treectrl - Create and manipulate hierarchical multicolumn widgets

Bitmap Element

       An element of type bitmap can be used to display  a  bitmap  in  an  item.   The  following  options  are
       supported for bitmap elements:

       -backgroundcolor
              Specifies  as  a per-state option the color to use for each of the bitmap's '0' valued pixels.  If
              the value for a certain state is an empty string (the default), the bitmap is drawn transparent.

       -bitmapbitmap
              Specifies as a per-state option the bitmap to display in the element.

       -drawboolean
              Deprecated; use the style layout option -draw instead.  Specifies as a per-state option whether to
              draw the element. If the value for a certain state is an empty string (the default), it is treated
              as true and the element will be drawn.

       -foregroundcolor
              Specifies as a per-state option the color to use for each of the bitmap's '1' valued  pixels.   If
              the  value  for a certain state is an empty string (the default), the bitmap's foreground color is
              black.

Border Element

An element of type border can be used to display a 3D border in an item. The following options are
supported for border elements:

-backgroundcolor
Specifies as a per-state option the color to use for the background of the border. If the value
for a certain state is an empty string (the default), the element will not be drawn.

-drawboolean
Deprecated; use the style layout option -draw instead. Specifies as a per-state option whether to
draw the element. If the value for a certain state is an empty string (the default), it is treated
as true and the element will be drawn.

-filledboolean
Specifies whether the interior of the border should be filled with the background color. If this
option is unspecified (the default), it it treated as false which means that only the edges of the
border will be drawn.

-heightsize
Specifies the height of the border. If this value is unspecified (the default), the border will be
exactly as tall as its display area as determined by the style layout options.

-reliefrelief
Specifies as a per-state option the relief of the border. If the value for a certain state is an
empty string (the default), it is treated as flat. For acceptable values see the description of
the -relief option in the options manual page.

-thicknessthickness
Specifies the thickness of the edges of the border.

-widthsize
Specifies the width of the border. If this value is unspecified (the default), the border will be
exactly as wide as its display area as determined by the style layout options.

Column Description

Many of the commands and options for a treectrl take as an argument a description of which column to
operate on. See the EXAMPLES section for examples. The initial part of a column description must begin
with one of the following terms:

id Specifies the unique column identifier, where id should be the return value of a prior call of the
columncreate widget command. See also the -columnprefix option.

QUALIFIERS
Specifies a list of qualifiers. This gives the same result as all followed by QUALIFIERS; i.e.,
every column is tested for a match.

tagExprQUALIFIERSTagExpr is a tag expression (see ITEMANDCOLUMNTAGS) against which every column's tags are
tested for a match. This keyword cannot be followed by any modifiers unless a single column is
matched. You may run into trouble if tagExpr looks like a column id or other keyword; also,
tagExpr must look like a single list element since column descriptions are properly-formed lists.
To be safe you may want to use the tag qualifier followed by tagExpr.

allQUALIFIERS
Indicates every column, including the tail column if the command allows it, which match
QUALIFIERS.

firstQUALIFIERS
Indicates the leftmost column of the treectrl which matches QUALIFIERS.

endQUALIFIERSlastQUALIFIERS
Indicates the rightmost column of the treectrl (but not the tail column) which matches QUALIFIERS.

listcolumnDescsColumnDescs is a list (a single argument, i.e. "list {a b c}" not "list a b c") of other column
descriptions. This keyword cannot be followed by any modifiers unless a single column is matched.

ordernQUALIFIERS
Indicates the nth column in the list of columns as returned by the columnorder command.

rangefirstlastQUALIFIERSFirst and last specify a range of columns. This keyword cannot be followed by any modifiers
unless a single column is specified.

tail Indicates the ever-present tail column of the treectrl.

tree Indicates the column specified by the -treecolumn option of the treectrl.

The initial part of the column description (matching any of the values above) may be followed by one or
more modifiers. A modifier changes the column used relative to the description up to this point. It may
be specified in any of the following forms:

nextQUALIFIERS
Use the column to the right matching QUALIFIERS.

prevQUALIFIERS
Use the column to the left matching QUALIFIERS.

spanNQUALIFIERS
Starting with (and counting) the single column specified by the column description so far, walk at
most N columns rightwards, stopping if any of the following conditions is met:

[1] A column does not match QUALIFIERS.

[2] A column's -lock option does not match the first column's -lock option.

The word QUALIFIERS above represents a sequence of zero or more of the following terms that changes which
column is chosen:

tagtagExprTagExpr is a tag expression (see ITEMANDCOLUMNTAGS) against which a column's tags are tested
for a match.

!tail When this qualifier is given, the tail column is not matched.

visible
When this qualifier is given, only columns whose -visible option is TRUE are considered.

!visible
When this qualifier is given, only columns whose -visible option is FALSE are considered.

Columns

A treectrl widget is capable of displaying multiple columns next to each other. An item can be
considered as a row, which reaches over all columns.

Columns in a treectrl may be specified in a number of ways. See COLUMNDESCRIPTION below.

There is always one special column, the tail column, which fills all space to the right of the last
ordinary column. This column has no unique ID; it can only be specified by the keyword tail.

For compatibility with older versions of treectrl (which did not support more than one row of column
headers) any of the configuration options mentioned in the HEADERS section, such as -arrow, -text, etc,
may be passed to the top header-row through the columnconfigure command and queried with the columncget
command.

The following options are supported for columns:

-expandboolean
Indicates whether or not any extra horizontal space should be distributed to this column. This
option has no effect if the -width option is set.

-gridleftcolorcolor-gridrightcolorcolor
Specifies the color of the lines drawn down the left and right edges of the column. These so-
called "grid lines" are drawn over the elements of each item style in the column and down into the
whitespace region below any items. The default value for each option is an empty string meaning
no lines are drawn.

-itembackgroundcolorList
Specifies a list of zero or more colors, which are used as alternating background colors for items
in this column. See also the -backgroundmode widget option for more on this.

-itemjustifyjustification
This option determines how the item styles in this column are aligned horizontally. Must be one
of left, center, or right. The default value is an empty string (for compatibility with older
versions), in which case the column option -justify is used to align item styles in this column.

-itemstylestyleStyle is the name of a style that should be set in this column for newly-created items.

-justifyjustification
This option determines how item styles in this column are aligned horizontally unless overriden by
the -itemjustify option for this column. Must be one of left (the default), center, or right.

For compatibility with older versions of treectrl (which did not allow multiple rows of column
headers), changing the value of this option also changes the -justify option of the column header
in the top header-row.

-locklock
This option allows a column to stick to the left or right edge of the window. A locked column
scrolls vertically but not horizontally. Must be one of none (the default), left, or right.

-maxwidthsize
Specifies the maximum size, in screen units, that will be permitted for this column. If size is
an empty string, then there is no limit on the maximum size of the column. This option has no
effect if the -width option is set.

-minwidthsize
Specifies the minimum size, in screen units, that will be permitted for this column. If size is
an empty string, then the minimum size of the column is zero. This option has no effect if the
-width option is set.

-resizeboolean
Specifies a boolean value that indicates whether the user should be allowed to resize the column
by dragging the edge of the column's header. Default is true.

-squeezeboolean
Specifies a boolean value that indicates whether or not the column should shrink when the content
width of the treectrl is less than the total needed width of all visible columns. Defaults to
false, which means the column will not get smaller than its needed width. The column will not get
smaller than the value of its -minwidth option, if specified. This option has no effect if the
-width option is set.

-stepwidthsize
Deprecated. Use the treectrl's -itemwidthmultiple option instead.

-tagstagListTagList is a list of tag names that can be used to identify the column. See also the columntag
command.

-uniformgroup
When a non-empty value is supplied, this option places the column in a uniformgroup with other
columns that have the same value for -uniform. The space for columns belonging to a uniform group
is allocated so that their sizes are always in strict proportion to their -weight values. This
option is based on the grid geometry manager.

-visibleboolean
Indicates whether or not the column should be displayed.

-weightinteger
Sets the relative weight for apportioning any extra space among columns. A weight of zero (0)
indicates the column will not deviate from its requested size. A column whose weight is two will
grow at twice the rate as a column of weight one when extra space is allocated to columns. This
option is based on the grid geometry manager.

-widthsize
Specifies a fixed width for the column. If this value is an empty string, then the column width is
calculated as the maximum of: a) the width requested by items; b) the width requested by the
column's header; and c) the column's -minwidth option. This calculated width is also affected by
the -expand, -squeeze, -uniform and -weight options. In any case, the calculated width will not be
greater than the -maxwidth option, if specified.

-widthhackboolean
Deprecated. Use the treectrl's -itemwidthequal option instead.

Default Bindings

Tk automatically creates class bindings for treectrl widgets that give them the following default
behavior.

[1] Clicking mouse button 1 over an item positions the active cursor on the item, sets the input focus
to this widget, and resets the selection of the widget to this item, if it is not already in the
selection.

[2] Clicking mouse button 1 with the Control key down will reposition the active cursor and add the
item to the selection without ever removing any items from the selection.

[3] If the mouse is dragged out of the widget while button 1 is pressed, the treectrl will
automatically scroll to make more items visible (if there are more items off-screen on the side
where the mouse left the window).

[4] The Left and Right keys move the active cursor one item to the left or right; for an hierarchical
tree with vertical orientation nothing will happen, since it has no two items in the same row.
The selection is set to include only the active item. If Left or Right is typed with the Shift
key down, then the active cursor moves and the selection is extended to include the new item.

[5] The Up and Down keys move the active cursor one item up or down. The selection is set to include
only the active item. If Up or Down is typed with the Shift key down, then the active cursor
moves and the selection is extended to include the new item.

[6] The Next and Prior keys move the active cursor forward or backwards by one screenful, without
affecting the selection.

[7] Control-Next and Control-Prior scroll the view right or left by one page without moving the active
cursor or affecting the selection. Control-Left and Control-Right behave the same.

[8] The Home and End keys scroll to the left or right end of the widget without moving the active
cursor or affecting the selection.

[9] The Control-Home and Control-End keys scroll to the top or bottom of the widget, they also
activate and select the first or last item. If also the Shift key is down, then the active cursor
moves and the selection is extended to include the new item.

[10] The Space and Select keys set the selection to the active item.

[11] Control-/ selects the entire contents of the widget.

[12] Control-\\ clears any selection in the widget.

[13] The + and - keys expand or collapse the active item, the Return key toggles the active item.

[14] The mousewheel scrolls the view of the widget four lines up or down depending on the direction,
the wheel was turned. The active cursor or the selection is not affected.

Description

treectrlpathName ?options?

The treectrl command creates a new window (given by the pathName argument) and makes it into a treectrl
widget. Additional options, described above, may be specified on the command line or in the option
database to configure aspects of the treectrl such as its background color and relief. The treectrl
command returns the path name of the new window. At the time this command is invoked, there must not
exist a window named pathName, but pathName's parent must exist.

A treectrl is a listbox widget which displays items in a one- or two-dimensional arrangement. Items have
a parent-child relationship with other items. Items may be arranged from top-to-bottom or from left-to-
right. Items may be spread about one or more columns. Each item-column may be configured to span one or
more adjacent item-columns. The visibility of items can be set individually.

Items have a set of states, which are boolean properties. For each column of an item there is a style
associated, which determines how to display the item's column taking into account the item's current
state set. New states may be defined to further control the appearance of items; these custom states may
be turned on or off in individual columns of items.

Multiple rows of column headers are supported. Column headers have platform-native appearance on
Windows, Mac OS X, and Gtk+. The appearance of column headers may be customized using styles.

Columns may be rearranged by the user using drag-and-drop. One column can be specified to display the
data in a hierarchical structure. The visibility of columns can be set individually.

A treectrl can display a user-resizable selection rectangle called the marquee. Another feature, the drag
image, may be used to provide feedback during drag-and-drop operations. Both of these are features
commonly found in file browsers.

A treectrl can generate events when various things happen, such as changes to the selection, or a parent
item being toggled open or closed. Scripts may be bound to these events. New events can be defined.

A treectrl can display a background image. The background image can be configured to be scrolled and
tiled on each axis individually.

Dynamic Events

In addition to the pre-defined static events such as <ActiveItem> and <Selection>, new dynamic events can
be created by using the notifyinstall command.

The library scripts provide an example of using a dynamic event called <Header-invoke>, which is
generated when the mouse button is clicked and released over a column header.

# Example application code
treectrl .t
.t notify install <Header-invoke>
.t notify bind MyTag <Header-invoke> {
puts "column header %C clicked in header-row %H in treectrl %T"
}
# Library code in treectrl.tcl
proc ::TreeCtrl::Release1 {w x y} {
...
$w notify generate <Header-invoke> [list H $Priv(header) C $Priv(column)] \
[list ::TreeCtrl::PercentsCmd $w]
...
}

In the example above, a new treectrl widget is created and the <Header-invoke> event is installed. A
script is bound to the event with notifybind which will print out the column ID, header ID and widget
name to the console. In a real application, any script bound to <Header-invoke> would be used to sort
the list based on the column header that was clicked.

Note there is no percentsCommand argument to notifyinstall; instead, the call to notifygenerate
specifies the %-substitution command. The charMap argument to notifygenerate provides a list of
%-substitution characters and values which is used by ::TreeCtrl::PercentsCmd. In the example, any %C in
any script bound to the <Header-invoke> event would be replaced by the value of $Priv(column), and %H
would be replaced by $Priv(header). The library procedure ::TreeCtrl::PercentsCmd also supports the same
common %-substitution characters as the built-in static events, such as %T, %P, %? etc.

The following dynamic events may be generated by the library scripts:

<ColumnDrag-begin>
This event is generated just after the user begins dragging a column header. At the time this
event is generated, the headerdragconfigure option -imagecolumn is set to the unique ID of the
column being dragged, the -imageoffset option is set to the horizontal distance the mouse pointer
has moved, and the -imagespan option is set to the span of the column header that was initially
clicked.

<ColumnDrag-indicator>
This event is generated each time a new place to drop the dragged column header is found. At the
time this event is generated, the headerdragconfigure option -indicatorcolumn is set to the
unique ID of the column before or after which the dragged column will be dropped, and the
-indicatorspan option is set to the span of the column header for this newly-chosen indicator
column.

<ColumnDrag-receive>
This event is generated when the user has successfully dragged and dropped a column header to a
new position. The library scripts do not actually move the dragged column. You must bind a script
to this event to move the column. See EXAMPLES.

<ColumnDrag-end>
This event is generated after the user finally releases the left mouse button while dragging a
column header. This event is generated after all the other <ColumnDrag> events even when the
column wasn't dragged to a new location (i.e., even when no <ColumnDrag-receive> event was
generated).

%H The header-row that contains the column header.

%C The column whose header is dragged within the header-row.

%b The column to move the dragged column(s) before. Valid for <ColumnDrag-receive> only.

<Drag-begin><Drag-receive><Drag-end>
Generated whenever the user drag-and-drops a file into a directory. This event is generated by the
filelist-bindings.tcl library code, which is not used by default. See the "Explorer" demos.

%I The item that the user dropped the dragged items on.

%l (lowercase L) The list of dragged items.

<Edit-begin><Edit-accept><Edit-end>
The filelist-bindings.tcl code will display a text-editing window if the user clicks on a selected
file/folder name. See the "Explorer" demos.

%I The item containing the edited text element.

%C The column containing the edited text element.

%E The name of the edited text element.

%t The edited text.

<Header-invoke>
Generated whenever the user clicks and releases the left mouse button in a column header if the
column header's -button option is true. You can bind a script to this event to sort the list.

%H The header-row that contains the column header.

%C The column whose header was clicked.

<Header-state>
Generated when the column header option -state is changed by the library scripts during Motion and
Button events.

%H The header-row that displays the column header.

%C The column within the header-row whose header option -state changed.

%s The new value of the column header option -state.

Elements And Styles

Elements and styles are the core visual building blocks that determine the appearance of items (and
optionally column headers). An element can be of type bitmap, border, header, image, rect, text or
window. One or more elements can be assigned to a style which manages the layout of those elements. It
may be helpful to think of an element as a Tk widget and a style as a Tk geometry manager such as grid,
pack or place.

When an element is created by the elementcreate command, that element is referred to as a master
element. Similarly, a style that is created by stylecreate is called a master style. When a master
style is assigned to a column of an item by the itemstyleset command, a new instance style is allocated
which refers back to the master style and its master elements. In this way, a single master style may be
shared by multiple columns of multiple items. If a master element or master style is modified, those
changes affect all the items whose instance styles and elements refer to those masters.

Although you probably want the font and selection-rectangle colors to be shared by all items, you most
likely don't want the text to be the same for every column of every item. The itemelementconfigure
command can be used to override a master element's configuration options for a specific column of an
item. When you call itemelementconfigure (or itemtext or itemimage), a new instance element is
allocated, if one wasn't already, and that instance element's options will override the master element's.

All of the element configuration options described below are unspecified by default, meaning that no
value whatsoever has been given to the option. It may seem strange to you that a boolean option would be
unspecified instead of simply "true" or "false". The reason for this is that when an instance element
used by an item has no value specified for an option, that instance element refers to the master element
for the value of that option. This allows items which are displaying a certain element to be redisplayed
when the master element's options change. The benefits of this are that you don't need to configure the
font or text color for every item in a treectrl individually, saving CPU cycles and memory.

You may be thinking that to change the color of a selection rectangle you would call itemelementconfigure when an item was selected, but that is not usually the case. It would be wasteful to allocate
a new instance element for a selection rectangle just because an item became selected. The solution is
to allow the appearance of the selection rectangle master element to change based on the selected state
of the item. This is described in PER-STATEOPTIONS.

For each element type there is a section below describing the options which can modify an element of that
type.

Events And Script Substitutions

The script argument to notifybind is a Tcl script, which will be evaluated whenever the given event is
generated. Script will be executed in the same interpreter that the notifybind command was executed in,
and it will run at global level (only global variables will be accessible). If script contains any %
characters, then the script will not be evaluated directly. Instead, a new script will be generated by
replacing each %, and the character following it, with information from the current event. Unlike the
regular Tk bind mechanism, each event generated by a treectrl widget has its own set of %-substitutions.

The following %-substitutions are valid for all static events:

%% Replaced with a single %

%d The detail name

%e The event name

%P The pattern, either <event> or <event-detail>

%W The object argument to the notifybind command

%T The treectrl widget which generated the event

%? A list of the format {char value char value ...} for each %-substitution character and the value
it is replaced by

The following events may be generated by a treectrl widget:

<ActiveItem>
Generated whenever the active item changes.

%c The current active item

%p The previous active item

<Collapse-before>
Generated before an item is collapsed.

%I The item id

<Collapse-after>
Generated after an item is collapsed.

%I The item id

<Expand-before>
Generated before an item is expanded. This event is useful if you want to add child items to the
item just before the item is expanded.

%I The item id

<Expand-after>
Generated after an item is expanded.

%I The item id

<ItemDelete>
Generated when items are about to be deleted by the itemdelete command.

%i List of items ids being deleted.

<ItemVisibility>
Generated when items become visible on screen and when items are no longer visible on screen.
This event is useful if you have a very large number of items and want to assign styles only when
items are actually going to be displayed.

%h List of items ids which are no longer visible.

%v List of items ids which are now visible.

<Scroll-x>
Generated whenever the view in the treectrl changes in such a way that a horizontal scrollbar
should be redisplayed.

%l Same as the first fraction appended to -xscrollcommand. Think lower.

%u Same as the second fraction appended to -xscrollcommand. Think upper.

<Scroll-y>
Generated whenever the view in the treectrl changes in such a way that a vertical scrollbar should
be redisplayed.

%l Same as the first fraction appended to -yscrollcommand. Think lower.

%u Same as the second fraction appended to -yscrollcommand. Think upper.

<Selection>
Generated whenever the selection changes. This event gives information about how the selection
changed.

%c Same as the selectioncount widget command

%D List of newly-deselected item ids

%S List of newly-selected item ids

Examples

       Get the unique identifier for the leftmost visible column:

       set id [$T column index "first visible"]

       Delete the leftmost column:

       $T column delete "order 0"

       Take the visible column that is to the left of the last column, and move that column in front of the tail
       column:

       $T column move "last prev visible" tail

       Get the unique identifier for the first visible item:

       set id [$T item index "first visible"]

       Delete the parent of the item that is under the point x,y:

       $T item delete "nearest $x $y parent"

       Add the 10th child of the second child of the root item to the selection:

       $T selection add "root firstchild nextsibling child 10"

       Move a column that the user drag-and-dropped:

       $T header dragconfigure -enable yes
       $T notify install <ColumnDrag-receive>
       $T notify bind MyTag <ColumnDrag-receive> {
                               %T column move %C %b
       }

Gradient Coordinates

       By default, a gradient brush is exactly the same size  as  whatever  rectangle  is  being  painted.   For
       example,  if  a column's -itembackground option specifies a gradient name, then the background of an item
       is painted with all the colors of the gradient.  So a vertical gradient from blue  to  green  will  start
       blue at the top and end with green at the bottom of every item.

       By  specifying  any of the -bottom, -left, -right or -top gradient options the size of the gradient brush
       does not need to match that of the rectangle being painted.  These options can be used to make a gradient
       appear to span across the entire width or height of the treectrl window, or across the entire canvas, for
       example.

       There is no point specifying -left or -right if the gradient is vertical, since the gradient's colors are
       constant horizontally, so changing the horizontal size of the brush won't change the  appearance  of  the
       gradient.  The same reasoning applies for the -top and -bottom options for a horizontal gradient.

       package require treectrl
       set T [treectrl .t -itemheight 20 -showheader no]
       $T gradient create G1 -orient vertical -top {0.0 canvas} -bottom {1.0 canvas} \
                               -stops {{0.0 blue} {0.5 green} {1.0 red}} -steps 25
       $T column create -expand yes -itembackground G1
       pack $T -expand yes -fill both

Gradients

Color gradients are an easy way to give your lists a more modern appearance. Since Tk provides no
support for drawing gradients, the TkPath extension was used as a guide when implementing gradients in
TkTreeCtrl. The current implementation has some limitations, however:

[1] Only linear gradients are supported.

[2] Gradients can only be painted left-to-right or top-to-bottom, not at arbitrary angles.

[3] Gradients look bad on low-color displays. Before using gradients, you should check that the
display's color depth is at least 15 or 16 by calling the winfodepth command.

[4] Gradients are fully opaque when XFillRectangle() is used to draw them (see below). This means the
opacity value of each color stop is ignored. Keep that in mind if your application is cross-
platform.

[5] Rounded rectangles cannot be filled or outlined with a gradient when XFillRectangle() is used to
draw gradients (see below). Instead, the rounded rectangle is painted with the gradient's first
-stops color.

Gradients may be used in the following places:

[1] The -gridleftcolor and -gridrightcolor options of columns.

[2] The -itembackground option of columns.

[3] The -fill and -outline options of rect elements.

[4] The -fill and -outline options of the marqueeconfigure command.

On Microsoft Windows, GDI+ is used where it is available (gdiplus.dll is dynamically loaded at run-time).
On Mac OS X, CoreGraphics is used to draw gradients. With the Gtk+ build of treectrl, libcairo is used
to draw gradients. When native gradient support is available, all the talk below about -steps can safely
be ignored.

When no native support for gradients is available, gradients are drawn simply by filling sub-rectangles
using XFillRectangle(). The number of sub-rectangles drawn and number of colors that make up the
displayed gradient are controlled by the gradient's -steps and -stops options. The number of sub-
rectangles is equal to the length of the -stops option multiplied by the value of the -steps option. For
example:

$T gradient create myGradient -stops {{0 white} {1 gray}} -steps 8

This gradient will be drawn with 2x8=16 sub-rectangles of color. The higher the -steps value, the
smoother the color transitions will be, and the slower the gradient will be to draw. For the best
appearance, make the number of sub-rectangles drawn less than or equal to the height or width of the
gradient being drawn. So if you have a rect element 18 pixels tall, use a vertical gradient that has
steps X stops=18. Avoid using gradients with steps X stops greater than the height or width of the
rectangle being drawn, because then colors will overlap.

Header Description

Many of the commands for a treectrl take as an argument a description of which header-rows to operate on.
A headerdescription is a properly-formed tcl list of keywords and arguments. The first word of a header
description must be one of the following:

id Specifies a unique header-row identifier, where id should be the return value of a prior call of
the headercreate widget command, or 0 to specify the ever-present top header-row.

QUALIFIERS
Specifies a list of qualifiers. This gives the same result as all followed by QUALIFIERS; i.e.,
every header-row is tested for a match.

tagExprQUALIFIERSTagExpr is a tag expression (see ITEMANDCOLUMNTAGS) against which every header-row's tags are
tested for a match. You may run into trouble if tagExpr looks like a header-row id or other
keyword; also, tagExpr must look like a single list element since header-row descriptions are
properly-formed lists. To be safe you may want to use the tag qualifier followed by tagExpr.

.t header dragconfigure {tag -funky} -draw yes

allQUALIFIERS
Matches every header-row which satisfies QUALIFIERS.

firstQUALIFIERS
Indicates the top header-row of the treectrl, or the first header-row starting from the top that
satisfies QUALIFIERS.

endQUALIFIERSlastQUALIFIERS
Indicates the last header-row which satisfies QUALIFIERS.

The word QUALIFIERS above represents a series of zero or more of the following terms that changes which
header-row is chosen:

tagtagExprTagExpr is a tag expression (see ITEMANDCOLUMNTAGS) against which a header-row's tags are
tested for a match.

visible
When this qualifier is given, only header-rows that are displayed are matched. A header-row is
displayed only if both the -showheader widget option and -visible header-row option are true.
Also, if only the tail column is visible, then header-rows are not displayed.

!visible
When this qualifier is given, only header-rows that are *not* displayed are matched.

Header Element

An element of type header can be used to display a themed (or non-themed) column header background and
sort arrow. Header elements are best used surrounding other elements via the style layout option -union,
so that the sort arrow can be displayed correctly.

Some of the options for this type of element get their default values from the headerstate flags that
are set in the column header in which the element is displayed. In particular, the -arrow option gets its
default value by checking the up and down state flags, and the -state option gets its default value by
checking the active, normal, and pressed state flags. If elements of this type are displayed in an item
instead of a column header, then this behavior isn't used since those state flags aren't meaningful for
items.

The following options are supported for header elements:

-arrowdirection
Indicates whether or not a sort arrow should be drawn. Direction must have one of the values none,
up, or down. If unspecified, the value defaults to none (but see the note above regarding header
states).

-arrowbitmapbitmap
Specifies as a per-state option the name of a bitmap to use to draw the sort arrow if this
element's -arrow option is not none. This option is ignored when drawing themed headers on Mac OS
X.

-arrowgravitydirection
Indicates onto which side the sort arrow should be packed, if there is more space available for
drawing the arrow than needed. Direction must be either left or right. If unspecified, the value
defaults to left. This option is ignored when drawing themed headers on Mac OS X.

-arrowimageimage
Specifies as a per-state option the name of an image to use to draw the sort arrow if this
element's -arrow option is not none. If an image is specified for a certain state, it overrides
the -arrowbitmap option. This option is ignored when drawing themed headers on Mac OS X.

-arrowpadxamountAmount specifies how much padding to leave on the left and right of the sort arrow. Amount may be
a list of two values to specify padding for the left and right separately. If unspecified, the
value defaults to 6. Padding to the right of the sort arrow is ignored when drawing themed
headers on Mac OS X.

-arrowpadyamountAmount specifies how much padding to leave on the top and bottom of the sort arrow. Amount may be
a list of two values to specify padding for the top and bottom separately. If unspecified, the
value defaults to 0. This option is ignored when drawing themed headers on Mac OS X.

-arrowsideside
Indicates on which side of the element the sort arrow should be drawn. Side must be either left
or right. If unspecified, the value defaults to right.

-backgroundcolor
Specifies as a per-state option the color to use for the non-themed background and 3D border. If
unspecified, the value defaults to either the Tk button widget's -background or -activebackground
color.

-borderwidthsize
Specifies a non-negative value indicating the width of the non-themed 3D border to draw around the
inner edges of the element (if such a border is being drawn; the -relief option determines this).
The value may have any of the forms acceptable to Tk_GetPixels. If unspecified, the value
defaults to 2.

-statestate
Specifies one of three states for the element: normal, active, or pressed. The active state is
used when the mouse is over the header. The pressed state is used when the mouse button is
pressed in the header. If unspecified, the value defaults to normal (but see the note above
regarding header states).

Headers

A treectrl widget can display zero or more rows of column headers. When a treectrl widget is created, a
single row of column headers (aka a header-row) is created as well; this top header-row cannot be
deleted. Additional header-rows can be created with the headercreate command and deleted with headerdelete.

There are no commands for changing the order of header-rows; they are displayed from top to bottom in
the order they were created.

Drag-and-drop reordering of column headers is supported within a widget. To control column header drag-
and-drop, use the headerdragconfigure command.

Header-rows in a treectrl may be specified in a number of ways. See HEADERDESCRIPTION below.

The appearance of individual column headers within a header-row may be customized in two different ways:

[1] By configuring various column header options with the headerconfigure command

[2] By assigning a style to a column header with the headerstyle command.

When one of the options below is specified as per-state, the state names are those described in STATES
for headers only, i.e. do not use item state names.

The following options are supported for each individual column header:

-arrowdirection
Indicates whether or not a sort arrow should be drawn in the column header. Direction must have
one of the values none (the default), up, or down.

-arrowbitmapbitmap
Specifies as a per-state option the name of a bitmap to use to draw the arrow if this column's
-arrow option is not none.

-arrowgravitydirection
Indicates onto which side the sort arrow should be packed, if there is more space available for
drawing the arrow then needed. direction must be either left (the default) or right.

-arrowimageimage
Specifies as a per-state option the name of an image to use to draw the sort arrow if this
column's -arrow option is not none. If an image is specified for a certain state, it overrides
the -arrowbitmap option.

-arrowpadxamountAmount specifies how much padding to leave on the left and right of the sort arrow. Amount may be
a list of two values to specify padding for left and right separately; it defaults to 6.

-arrowpadyamountAmount specifies how much padding to leave on the top and bottom of the sort arrow. Amount may be
a list of two values to specify padding for top and bottom separately; it defaults to 0.

-arrowsideside
Indicates on which side of the bitmap/image/text the sort arrow should be drawn. Side must be
either left or right (the default).

-bitmapbitmap
Specifies the name of a bitmap to display to the left of the column title.

-backgroundcolor
Specifies as a per-state option the color to use for the background of the column header.

-borderwidthsize
Specifies a non-negative value indicating the width of the 3-D border to draw around the outside
of the column header (if such a border is being drawn; the -relief column option determines
this). The value may have any of the forms acceptable to Tk_GetPixels.

-buttonboolean
Indicates whether or not the column header should be treated like a pushbutton. When this option
is true, the default bindings track <Button-1> events in the header and generate a <Header-invoke>
event when a <ButtonRelease-1> event occurs in the header. See DYNAMICEVENTS.

-fontfontName
Specifies the font to use for displaying the column title inside the column header. When the
value of this option is unspecified, the font specified by the widget option -headerfont is used.

-imageimage
Specifies the name of an image to display to the left of the column title. This option overrides
the -bitmap column option.

-imagepadxamountAmount specifies how much padding to leave on the left and right of the image (or bitmap). Amount
may be a list of two values to specify padding for left and right separately; it defaults to 6.

-imagepadyamountAmount specifies how much padding to leave on the top and bottom of the image (or bitmap). Amount
may be a list of two values to specify padding for top and bottom separately; it defaults to 0.

-justifyjustification
This option determines how the image and text in the column header are positioned. Must be one of
left (the default), center, or right.

-statestate
Specifies one of three states for the column header: normal, active, or pressed. The active state
is used when the mouse is over the header. The pressed state is used when the mouse button is
pressed in the header.

Changing the value of this option also affects the current set of headerstates for the column
header, which may affect both the per-state options mentioned here (such as -arrowimage) as well
as the elements in any style that may be assigned to the column header.

-texttext
Specifies a text string to be displayed as the column title.

-textcolorcolor
Specifies as a per-state option the color to display the column title with. When the value of
this option is unspecified, the title will be drawn according to the system theme color, if any,
otherwise the widget option -headerforeground is used. The default is unspecified.

-textlinescount
Specifies the maximum number of lines of text to display in the column title. If this value is
zero, the number of lines displayed is determined by any newline characters and the effects of
wrapping when the column width is less than needed. The default is 1. Note: Under OSX/Aqua this
value is always set to 1 when the treectrl's -usetheme option is true, because the Appearance
Manager uses a fixed height for the column header; there is only room for a single line of text.

-textpadxamountAmount specifies how much padding to leave on the left and right of the text. Amount may be a
list of two values to specify padding for left and right separately; it defaults to 6.

-textpadyamountAmount specifies how much padding to leave on the top and bottom of the text. Amount may be a
list of two values to specify padding for top and bottom separately; it defaults to 0.

Image Element

       An element of type image can be used to display an image in an item.  The following options are supported
       for image elements:

       -drawboolean
              Deprecated; use the style layout option -draw instead.  Specifies as a per-state option whether to
              draw the element. If the value for a certain state is an empty string (the default), it is treated
              as true and the element will be drawn.

       -heightsize
              Specifies  the  requested  height  of  the  display  area  for  this element.  If unspecified (the
              default), the element requests a height equal to the height of the image, or zero if there  is  no
              image.

       -imageimage
              Specifies as a per-state option the image to display in the element.

       -tiledboolean
              Specifies  a  boolean  indicating  whether  or  not  the  image  should  be tiled horizontally and
              vertically within the display area for the element.  The default is false.

       -widthsize
              Specifies the requested width of the display area for this element.  If unspecified (the default),
              the element requests a width equal to the width of the image, or zero if there is no image.

Item And Column Tags

       Columns  and  items  may  have  any  number  of  tags  associated  with  them.  A tag is just a string of
       characters, and it may take any form, including that of an integer, although  the  characters  '(',  ')',
       '&', '|', '^' and '!' should be avoided.

       The  same  tag  may  be  associated  with  many columns or items. This is commonly done to group items in
       various interesting ways; for example, in  a  file  browser  all  directories  might  be  given  the  tag
       "directory".

       Tag  expressions are used in columndescriptions and itemdescriptions to specify which columns and items
       to operate on.  A tag expression can be a single tag name or a logical expression of tags using operators
       '&&', '||', '^' and '!', and parenthesized subexpressions.  For example:

       .t item id "tag {(a && !b) || (!a && b)}"

       or equivalently:

       .t item id "tag {a ^ b}"

       will return the unique ids of any items with either "a" or "b" tags, but not both.

       Within a tag expression a tag name may be enclosed in double quotes to avoid special  processing  of  the
       operator characters. For example:

       .t item id {tag {"a&&b"||c}}

       will  return  the  unique  ids of any items with either "a&&b" or "c" tags; in this example the && is not
       treated as an operator. A double-quote may be escaped within a quoted tag name using a backslash '\'.

       Tag operators may be bypassed completely by setting the -columntagexpr and -itemtagexpr options. This can
       be useful if your application has column or item tags containing arbitrary text.

       .t configure -itemtagexpr false
       .t item delete "tag a&&b"

Item Description

Many of the commands for a treectrl take as an argument a description of which items to operate on. An
item description is a properly-formed tcl list of keywords and arguments. The first word of an item
description must be one of the following:

id Specifies the unique item identifier, where id should be the return value of a prior call of the
itemcreate widget command, or 0 to specify the ever-present root item. See also the -itemprefix
option.

QUALIFIERS
Specifies a list of qualifiers. This gives the same result as all followed by QUALIFIERS; i.e.,
every item is tested for a match.

tagExprQUALIFIERSTagExpr is a tag expression (see ITEMANDCOLUMNTAGS) against which every item's tags are tested
for a match. This keyword cannot be followed by any modifiers unless a single item is matched.
You may run into trouble if tagExpr looks like an item id or other keyword; also, tagExpr must
look like a single list element since item descriptions are properly-formed lists. To be safe you
may want to use the tag qualifier followed by tagExpr.

active Indicates the item that is currently active, i.e. normally the item specified as argument of the
last successful activate widget command, or the root item if no such call happened yet.

anchor Indicates the anchor item of the selection, i.e. normally the item specified as argument of the
last successful selectionanchor widget command, or the root item if no such call happened yet.

allQUALIFIERS
Indicates every item including orphans which match QUALIFIERS. This keyword cannot be followed by
any modifiers unless a single item is matched.

firstQUALIFIERS
Indicates the first item of the treectrl (the root item), or the first item matching QUALIFIERS.

endQUALIFIERSlastQUALIFIERS
Indicates the last item which matches QUALIFIERS.

listitemDescsItemDescs is a list (a single argument, i.e. "list {a b c}" not "list a b c") of other item
descriptions. This keyword cannot be followed by any modifiers unless a single item is matched.

nearestxy
Indicates the item nearest to the point given by x and y.

rncrowcolumn
Indicates the item in the given row and column. The row and column corresponds to the on-screen
arrangement of items as determined by the -orient and -wrap options. You can memorize rnc as an
abbreviation of "row 'n' column".

rangefirstlastQUALIFIERSFirst and last specify a range of items. This keyword cannot be followed by any modifiers unless
a single item is matched.

root Indicates the root item of the treectrl.

The initial part of the item description (matching any of the values above) may be followed by one or
more modifiers. A modifier changes the item used relative to the description up to this point. It may
be specified in any of the following forms:

above Use the item one row above in this column.

ancestorsQUALIFIERS
Use the ancestors of the item (like itemancestors but QUALIFIERS may change which ancestors
match). This keyword cannot be followed by any modifiers.

below Use the item one row below in this column.

bottom Use the item in the last row of this column.

childnQUALIFIERS
Use the nth child of the item.

childrenQUALIFIERS
Use the children of the item (like itemchildren but QUALIFIERS may change which children match).
This keyword cannot be followed by any modifiers.

descendantsQUALIFIERS
Use the descendants of the item (like itemdescendants but QUALIFIERS may change which descendants
match). This keyword cannot be followed by any modifiers.

firstchildQUALIFIERS
Use the first child of the item.

lastchildQUALIFIERS
Use the last child of the item.

left Use the item one column to the left in the same row.

leftmost
Use the item of the first column in the same row.

nextQUALIFIERS
Use the next item, which is the first item from the following list: the first child, the next
sibling or the next sibling of the nearest ancestor which has one.

nextsiblingQUALIFIERS
Use the next sibling of the item.

parent Use the parent of the item.

prevQUALIFIERS
Use the last child of the previous sibling, or the parent if there is no previous sibling.

prevsiblingQUALIFIERS
Use the previous sibling of the item.

right Use the item one column to the right in the same row.

rightmost
Use the item of the last column in the same row.

siblingnQUALIFIERS
Use the nth child of the item's parent.

top Use the item in the first row of this column.

The word QUALIFIERS above represents a series of zero or more of the following terms that changes which
item is chosen:

depthdepth
Matches items whose depth (as returned by the depth command) is equal to depth.

statestateListStateList is a list of item state names (static and dynamic, see STATES). Only items that have
the given states set (or unset if the '!' prefix is used) are considered.

tagtagExprTagExpr is a tag expression (see ITEMANDCOLUMNTAGS) against which an item's tags are tested for
a match.

visible
When this qualifier is given, only items that are displayed are considered.

!visible
When this qualifier is given, only items that are *not* displayed are considered.

To get the first item in the list that is enabled:

$T item id "first state enabled"

To get the ancestors that are not open of the last item in the list:

$T item id "last ancestors state !open"

To get the visible descendants of the root item:

$T item id "root descendants visible"

To get the every hidden item with tag "a" or "b":

$T item id "all !visible tag a||b"
$T item id "!visible tag a||b"
$T item id "tag a||b !visible"
$T item id "a||b !visible"

Keywords

       tree, widget

treectrl                                              2.4.1                                        treectrl(3tk)

Name

       treectrl - Create and manipulate hierarchical multicolumn widgets

Per-State Options

The visual appearance of an item can change depending on the state the item is in, such as being the
active item, being included in the selection, being collapsed, or some combination of those or other
states. When a configuration option is described as per-state, it means the option describes a value
which varies depending on the state of the item. If a per-state option is specified as a single value,
the value is used for all states. Otherwise the per-state option must be specified as an even-numbered
list. For example, to use the font "Times 12 bold" in a text element regardless of the item state you can
write:

$T element configure MyTextElement -font {{Times 12 bold}}

However, to use a different font when the item is selected you could write:

$T element configure MyTextElement -font {{Courier 10} selected {Times 12 bold} {}}

In the example above, the -font option reads "value stateList value stateList". If stateList is an empty
list, the preceding value is used regardless of the item state. A non-empty stateList specifies a list of
states which must be set for the item in order to use the preceding value. Each stateList can also
include state names preceded by a ! sign, indicating the state must *not* be set for the item. For
example:

$T element configure MyRectElement -fill {blue {selected focus} gray {selected !focus}}

In the example above, the rect element is filled with blue when the treectrl has the focus and the item
is selected. If the treectrl does not have the focus, the example specifies that gray should be used for
selected items. Also note that if the item is not selected, no color is specified for the -fill option.

Each value-stateList pair is checked in order from left to right. The value associated with the first
stateList that matches the current item state is used. So stateLists should be listed from most-specific
to least-specific.

$T element configure MyRectElement -fill {gray {selected} blue {selected focus}}

Written this way, gray will always be used for selected items since it appears first, and blue will never
be used for selected items regardless of the focus.

A value followed by an empty stateList should always be last since it will be chosen regardless of the
item's state.

Rectangle Element

An element of type rect can be used to display a rectangle in an item. The following options are
supported for rectangle elements:

-fillcolor
Specifies as a per-state option the color to be used to fill the rectangle's area. If the color
for a certain state is an empty string (the default), then the rectangle will not be filled (but
the outline may still be drawn).

-heightsize
Specifies the height of the rectangle. If this value is unspecified (the default), the rectangle
will be exactly as tall as its display area as determined by the style layout options.

-openopen
Specifies as a per-state option which edges of the rectangle should be left open. This option may
be used to get an incomplete drawing of the outline and rounded corners, often to give the
appearance of the rectangle extending over adjacent columns or items. Open is a string that
contains zero or more of the characters n, s, e or w. Each letter refers to an edge (north,
south, east, or west) on which the outline and rounded corners will not be drawn. The default is
the empty string, which causes all rounded corners and the outline to be drawn.

-outlinecolor
Specifies as a per-state option the color to be used to draw the outline of the rectangle. If the
color for a certain state is an empty string (the default), then no outline is drawn for the
rectangle.

-outlinewidthoutlineWidth
Specifies the width of the outline to be drawn around the rectangle's region. outlineWidth may be
in any of the forms acceptable to Tk_GetPixels. If this option is specified as an empty string
(the default), then no outline is drawn.

-rxradius-ryradius
Specifies the x and y radius of each corner of a rounded rectangle in any of the forms acceptable
to Tk_GetPixels.

-showfocusboolean
Specifies a boolean value indicating whether a "focus ring" should be drawn around the rectangle,
if the item containing the rectangle is the active item and the treectrl widget currently has the
focus. If this option is specified as an empty string (the default), then a focus rectangle is
not drawn.

-widthsize
Specifies the width of the rectangle. If this value is unspecified (the default), the rectangle
will be exactly as wide as its display area as determined by the style layout options.

Standard Options

-background-borderwidth-cursor-font-highlightbackground-highlightcolor-highlightthickness-orient-relief-takefocus-xscrollcommand-yscrollcommand-foreground

       See the option manual entry for details on the standard options.

States

For every column header and every item a set of boolean states is managed. These states play an integral
role in the appearance of headers and items; that role is described in detail in PER-STATEOPTIONS. The
set of states available to headers is separate from the set of states available to items.

HEADER STATES
The following states are predefined for every column header:

activenormalpressed
These states mirror the value of a column header's configuration option -state. Exactly
one of these states is set at any time in each column header.

downup These states mirror the value of a column header's configuration option -arrow. If the
-arrow option is none, then neither of these states is set.

background
This state is set for every header-row if the toplevel window containing the treectrl is
not the foreground active window. This state cannot be modified by means of a widget
command, but is maintained in reaction to the <Activate> and <Deactivate> windowing system
events.

focus This state is set for every header-row if the treectrl widget currently has the focus. It
cannot be modified by means of a widget command, but is maintained in reaction to the
<FocusIn> and <FocusOut> windowing system events.

ITEM STATES
The following states are predefined for every item:

active At all times this state is set for exactly one item. The active item is used with keyboard
navigation. When the treectrl widget is created or when the active item is deleted, the
root item will become the active item. This state can be modified by means of the widget
command activate.

enabled
This state is set for every item when it is created. Disabled items cannot be selected and
are ignored by the default bindings when navigating via the keyboard. This state can be
modified by means of the widget command itemenabled.

focus This state is set for every item if the treectrl widget currently has the focus. It cannot
be modified by means of a widget command, but is maintained in reaction to the <FocusIn>
and <FocusOut> events.

open If this state is switched on, the descendants of the item are displayed - the item is
expanded. If this state is switched off, the descendants of the item are not displayed -
the item is collapsed. For a new item this state is switched on by default. This state
can be modified by means of the widget commands itemexpand, itemcollapse, or itemtoggle.

selected
This state is set for every item included in the selection. It can be modified by means of
the widget command selection.

By means of the statedefine widget command, up to 27 additional states can be defined.

Synopsis

       package require treectrl2.4.1treectrlpathName ?options?

       pathNameactivateitemDescpathNamebbox ?area?

       pathNamecanvasxwindowxpathNamecanvasywindowypathNamecgetoptionpathNamecollapse ?-recurse? ?itemDesc...?

       pathNamecolumnoptioncolumn ?arg...?

       pathNamecolumnbboxcolumnDescpathNamecolumncgetcolumnDescoptionpathNamecolumnconfigurecolumnDesc ?option? ?value? ?optionvalue...?

       pathNamecolumncomparecolumn1opcolumn2pathNamecolumncount ?columnDesc?

       pathNamecolumncreate ?optionvalue...?

       pathNamecolumndeletefirst ?last?

       pathNamecolumndragcgetoptionpathNamecolumndragconfigure ?option? ?value? ?optionvalue...?

       pathNamecolumnindexcolumnDescpathNamecolumnidcolumnDescpathNamecolumnlist ?-visible?

       pathNamecolumnmovecolumnDescbeforeDescpathNamecolumnneededwidthcolumnDescpathNamecolumnordercolumnDesc ?-visible?

       pathNamecolumntagoption ?argarg...?

       pathNamecolumntagaddcolumnDesctagListpathNamecolumntagexprcolumnDesctagExprpathNamecolumntagnamescolumnDescpathNamecolumntagremovecolumnDesctagListpathNamecolumnwidthcolumnDescpathNamecompareitemDesc1opitemDesc2pathNameconfigure ?option? ?valueoptionvalue...?

       pathNamecontentboxpathNamedebugoption ?argarg...?

       pathNamedebugallocpathNamedebugcgetoptionpathNamedebugconfigure ?option? ?value? ?optionvalue...?

       pathNamedebugdinfooptionpathNamedebugexposex1y1x2y2pathNamedepth ?itemDesc?

       pathNamedragimageoption ?arg...?

       pathNamedragimageadditemDesc ?column? ?element?

       pathNamedragimagecgetoptionpathNamedragimageclearpathNamedragimageconfigure ?option? ?value? ?optionvalue...?

       pathNamedragimageoffset ?xy?

       pathNameelementoption ?element? ?argarg...?

       pathNameelementcgetelementoptionpathNameelementconfigureelement ?option? ?value? ?optionvalue...?

       pathNameelementcreatenametype ?optionvalue...?

       pathNameelementdelete ?element...?

       pathNameelementnamespathNameelementperstateelementoptionstateListpathNameelementtypeelementpathNameexpand ?-recurse? ?itemDesc...?

       pathNamegradientoption ?arg...?

       pathNamegradientcgetgradientoptionpathNamegradientconfiguregradient ?optionvalue...?

       pathNamegradientcreatename ?optionvalue...?

       pathNamegradientdelete ?name...?

       pathNamegradientnamespathNamegradientnative ?preference?

       pathNameheaderoption ?arg...?

       pathNameheaderbboxheaderDesc ?column? ?element?

       pathNameheadercompareheaderDesc1opheaderDesc2pathNameheaderconfigureheaderDesc ?arg...?

       pathNameheadercount ?headerDesc?

       pathNameheadercreate ?optionvalue?

       pathNameheaderdeleteheaderDescpathNameheaderdragcget ?arg...?

       pathNameheaderdragconfigure ?arg...?

       pathNameheaderelement ?arg...?

       pathNameheaderidheaderDescpathNameheaderimageheaderDesc ?column? ?image? ?columnimage...?

       pathNameheaderspanheaderDesc ?column? ?numColumns? ?columnnumColumns...?

       pathNameheaderstatecommandheaderDesc ?arg...?

       pathNameheaderstylecommandheaderDesc ?arg...?

       pathNameheadertextheaderDesc ?column? ?text? ?columntext...?

       pathNameheadertagcommandheaderDesc ?arg...?

       pathNameidentify ?-arrayvarName? xypathNameindexitemDescpathNameitemoption ?arg...?

       pathNameitemancestorsitemDescpathNameitembboxitemDesc ?column? ?element?

       pathNameitembuttonstateitemDesc ?state?

       pathNameitemcgetitemDescoptionpathNameitemchildrenitemDescpathNameitemcollapseitemDesc ?-animate? ?-recurse?

       pathNameitemcompareitemDesc1opitemDesc2pathNameitemcomplexitemDesc ?list...?

       pathNameitemconfigureitemDesc ?option? ?value? ?optionvalue...?

       pathNameitemcount ?itemDesc?

       pathNameitemcreate ?optionvalue...?

       pathNameitemdeletefirst ?last?

       pathNameitemdescendantsitemDescpathNameitemdumpitemDescpathNameitemelementcommanditemDesccolumnelement ?arg...?

       pathNameitemelementactualitemDesccolumnelementoptionpathNameitemelementcgetitemDesccolumnelementoptionpathNameitemelementconfigureitemDesccolumnelement ?option? ?value? ?optionvalue...?

       pathNameitemelementperstateitemDesccolumnelementoption ?stateList?

       pathNameitemenableditemDesc ?boolean?

       pathNameitemexpanditemDesc ?-animate? ?-recurse?

       pathNameitemfirstchildparent ?child?

       pathNameitemiditemDescpathNameitemimageitemDesc ?column? ?image? ?columnimage...?

       pathNameitemisancestoritemDescdescendantpathNameitemisopenitemDescpathNameitemlastchildparent ?child?

       pathNameitemnextsiblingsibling ?next?

       pathNameitemnumchildrenitemDescpathNameitemorderitemDesc ?-visible?

       pathNameitemparentitemDescpathNameitemprevsiblingsibling ?prev?

       pathNameitemrangefirstlastpathNameitemremoveitemDescpathNameitemrncitemDescpathNameitemsortitemDesc ?option...?

       pathNameitemspanitemDesc ?column? ?numColumns? ?columnnumColumns...?

       pathNameitemstatecommanditemDesc ?arg...?

       pathNameitemstatedefinestateNamepathNameitemstateforcolumnitemDesccolumn ?stateDescList?

       pathNameitemstategetitemDesc ?stateName?

       pathNameitemstatelinkagestateNamepathNameitemstatenamespathNameitemstatesetitemDesc ?lastItem? stateDescListpathNameitemstateundefine ?stateName...?

       pathNameitemstylecommanditemDesc ?arg...?

       pathNameitemstyleelementsitemDesccolumnpathNameitemstylemapitemDesccolumnstylemappathNameitemstylesetitemDesc ?column? ?style? ?columnstyle...?

       pathNameitemtagoption ?argarg...?

       pathNameitemtagadditemDesctagListpathNameitemtagexpritemDesctagExprpathNameitemtagnamesitemDescpathNameitemtagremoveitemDesctagListpathNameitemtextitemDesc ?column? ?text? ?columntext...?

       pathNameitemtoggleitemDesc ?-animate? ?-recurse?

       pathNamemarqueeoption ?arg...?

       pathNamemarqueeanchor ?xy?

       pathNamemarqueecgetoptionpathNamemarqueeconfigure ?option? ?value? ?optionvalue...?

       pathNamemarqueecoords ?x1y1x2y2?

       pathNamemarqueecorner ?xy?

       pathNamemarqueeidentifypathNamenotifyoption ?arg...?

       pathNamenotifybind ?object? ?pattern? ?+??script?

       pathNamenotifyconfigureobjectpattern ?option? ?value? ?optionvalue...?

       pathNamenotifydetailnameseventNamepathNamenotifyeventnamespathNamenotifygeneratepattern ?charMap? ?percentsCommand?

       pathNamenotifyinstallpattern ?percentsCommand?

       pathNamenotifyinstalldetaileventNamedetail ?percentsCommand?

       pathNamenotifyinstalleventeventName ?percentsCommand?

       pathNamenotifylinkagepatternpathNamenotifylinkageeventName ?detail?

       pathNamenotifyunbindobject ?pattern?

       pathNamenotifyuninstallpatternpathNamenotifyuninstalldetaileventNamedetailpathNamenotifyuninstalleventeventNamepathNamenumcolumnspathNamenumitemspathNameorphanspathNamerangefirstlastpathNamescanoptionargspathNamescanmarkxypathNamescandragtoxy ?gain?

       pathNameseeitemDesc ?columnDesc? ?optionvalue...?

       pathNameselectionoptionargspathNameselectionaddfirst ?last?

       pathNameselectionanchor ?itemDesc?

       pathNameselectionclear ?first? ?last?

       pathNameselectioncountpathNameselectionget ?first? ?last?

       pathNameselectionincludesitemDescpathNameselectionmodifyselectdeselectpathNamestateoptionargspathNamestatedefinestateNamepathNamestatelinkagestateNamepathNamestatenamespathNamestateundefine ?stateName...?

       pathNamestyleoption ?element? ?argarg...?

       pathNamestylecgetstyleoptionpathNamestyleconfigurestyle ?option? ?value? ?optionvalue...?

       pathNamestylecreatename ?optionvalue...?

       pathNamestyledelete ?style...?

       pathNamestyleelementsstyle ?elementList?

       pathNamestylelayoutstyleelement ?option? ?value? ?optionvalue...?

       pathNamestylenamespathNamethemeoption ?arg...?

       pathNamethemeplatformpathNamethemesetwindowthemeappnamepathNametoggle ?-recurse? ?itemDesc...?

       pathNamexview ?args?

       pathNamexviewpathNamexviewmovetofractionpathNamexviewscrollnumberwhatpathNameyview ?args?

       pathNameyviewpathNameyviewmovetofractionpathNameyviewscrollnumberwhat

_________________________________________________________________

Text Element

An element of type text can be used to display a text in an item. The following options are supported
for text elements:

-datadata
Specifies a value that together with the -datatype and -format options will be displayed as text.

-datatypedataType
Specifies the type of information in the -data option. Acceptable values are double, integer,
long, string, or time.

-fillcolor
Specifies as a per-state option the foreground color to use when displaying text.

In items, if the color for a certain state is an empty string (the default), then the text will be
displayed using the color specified by the treectrl's -foreground option.

In headers, if the color for a certain state is an empty string, then the text will be displayed
using the system theme color on Gtk+; if that color is not specified then the -headerforeground
option is used.

-fontfont
Specifies as a per-state option the font to use when displaying the text. If the font for a
certain state is an empty string, the text is displayed using the font specified by the treectrl's
-font option in items or the -headerfont option in headers.

-formatformatString
This option specifies the format string used to display the value of the -data option. If
-datatype is time, formatString should be a valid format string for the Tcl clock command. For
all other -datatype values formatString should be a valid format string for the Tcl format
command. If this value is unspecified the following defaults are used: for -datatype double "%g",
for -datatype integer "%d", for -datatype long "%ld", for -datatype string "%s", and for -datatype
time the default format string of the Tcl clock command.

-justifyhow
Specifies how to justify the text when multiple lines are displayed. How must be one of the
values left, right, or center. If this option is specified as an empty string (the default), left
is used.

-lineslineCount
Specifies the maximum number of lines to display. If more than lineCount lines would be
displayed, the last line will be truncated with an ellipsis at the right. If this option is
specified as zero or an empty string (the default), there is no limit to the number of lines
displayed.

-lmargin1pixelsPixels is a screen distance that specifies how much a line of text should be indented. If a line
of text wraps, this option only applies to the first line on the display; the -lmargin2 option
controls the indentation for subsequent lines. If this option is specified as zero or an empty
string (the default), then the line is not indented. This option was based on the Tk Text widget
tag option of the same name.

-lmargin2pixelsPixels is a screen distance that specifies how much a line of text should be indented. If a line
of text wraps, this option only applies to the second and later display lines for a line of text.
If this option is specified as zero or an empty string (the default), then the line is not
indented. This option was based on the Tk Text widget tag option of the same name.

-textstringString specifies a string to be displayed by the element. String may contain newline characters
in which case multiple lines of text will be displayed. If this option is specified, the -data,
-datatype, -format, and -textvariable options are ignored.

-textvariablevarName
Specifies the name of a variable. The value of the variable is a string to be displayed by the
element; if the variable value changes then the element will automatically update itself to
display the new value. If this option is specified, the -data, -datatype, and -format options are
ignored.

-underlinecharIndex
Specifies the integer index of a character to underline. 0 corresponds to the first character.
If charIndex is unspecified (the default), less than zero or greater than the index of the last
displayed character, the underline is not drawn.

-widthsize
Specifies the maximum line length in any of the forms acceptable to Tk_GetPixels. For text to
wrap lines the value of the -width option must be less than the needed width of the text, or the
display area for this element must be less than the needed width of the text. For the display
area to be less than the needed width of the text, one of the style layout options -maxwidth,
-width or -squeeze must be used.

-wrapmodeMode specifies how to handle lines in the text that are longer than the maximum line length.
Acceptable values are none, char or word. If this option is unspecified (the default), word is
used. See the -width option for a description of how the maximum line length is determined.

The Canvas

       Throughout  this  manual  page  the  term  canvas is sometimes used.  The canvas can be thought of as the
       virtual sheet of paper upon which all visible items are drawn.  The treectrl  window  displays  different
       areas of the canvas within its borders as the list is scrolled.

Widget Command

The treectrl command creates a new Tcl command whose name is the same as the path name of the treectrl's
window. This command may be used to invoke various operations on the widget. It has the following
general form:

pathNameoption ?argarg...?

PathName is the name of the command, which is the same as the treectrl widget's path name. Option and
the args determine the exact behavior of the command. The following commands are possible for treectrl
widgets:

pathNameactivateitemDesc
Sets the active item to the one described by itemDesc, and switches on the state active for that
item. The active item can be referred to by the item description active. If this command changes
which item is active an <ActiveItem> event is generated. If the active item is deleted the root
item becomes the new active item.

pathNamebbox ?area?
Returns a list with four elements giving the bounding box (left, top, right and bottom) of an area
of the window. If area is not specified, then the result is the bounding box of the entire window.
If area is content, then the result is the part of the window not including borders, headers, or
locked columns. If area is header, then the result is the part of the window not including
borders where column titles are displayed. If area is left, then the result is the part of the
window not including borders or headers where left-locked columns are displayed. If area is
right, then the result is the part of the window not including borders or headers where right-
locked columns are displayed.

If area is one of header.left, header.none or header.right then the area of the column headers
occupied by columns with -lock=left, -lock=none or -lock=right is returned.

An empty string is returned if the display area has no height or width, which can be true for
various reasons such as the window is too small, or the header is not displayed, or there aren't
any locked columns.

pathNamecanvasxwindowx
Translates the given window x-coordinate windowx in the treectrl to canvas coordinate space. The
marquee command expects canvas coordinates.

pathNamecanvasywindowy
Translates the given window y-coordinate windowy in the treectrl to canvas coordinate space. The
marquee command expects canvas coordinates.

pathNamecgetoption
Returns the current value of the configuration option given by option. Option may have any of the
values accepted by the tree command.

pathNamecollapse ?-recurse? ?itemDesc...?
Deprecated. Use itemcollapse instead.

pathNamecolumnoptioncolumn ?arg...?
This command is used to manipulate the columns of the treectrl widget (see section COLUMNS below).
The exact behavior of the command depends on the option argument that follows the column argument.
The following forms of the command are supported:

pathNamecolumnbboxcolumnDesc
Returns a list with four elements giving the bounding box of the header of the column
specified by the columndescriptioncolumnDesc. The returned coordinates are relative to
the top-left corner of the widget. If the column option -visible=false or if the widget
option -showheader=false, then an empty list is returned.

pathNamecolumncgetcolumnDescoption
This command returns the current value of the option named option for the column specified
by the columndescriptioncolumnDesc, ColumnDesc may also be the string tail to specify the
tail column. Option may have any of the values accepted by the columnconfigure widget
command.

pathNamecolumnconfigurecolumnDesc ?option? ?value? ?optionvalue...?
This command is similar to the configure widget command except that it modifies options
associated with the columns specified by the columndescriptioncolumnDesc instead of
modifying options for the overall treectrl widget. ColumnDesc may be the string tail to
specify the tail column. If columnDesc refers to more than one column, then at least one
option-value pair must be given. If no option is specified, the command returns a list
describing all of the available options for columnDesc (see Tk_ConfigureInfo for
information on the format of this list). If option is specified with no value, then the
command returns a list describing the one named option (this list will be identical to the
corresponding sublist of the value returned if no option is specified). If one or more
option-value pairs are specified, then the command modifies the given option(s) to have the
given value(s) for columnDesc; in this case the command returns an empty string.

See COLUMNS below for details on the options available for columns.

For compatibility with older versions of treectrl (which did not support more than one row
of column headers) any of the configuration options mentioned in the HEADERS section, such
as -arrow, -text, etc, may be passed to the top header-row through this command.

pathNamecolumncomparecolumn1opcolumn2
For both columndescriptionscolumn1 and column2 the index is retrieved (as returned from
the columnorder widget command). Then these indexes are compared using the operator op,
which must be either <, <=, ==, >=, >, or !=. The return value of this command is 1 if
the comparison evaluated to true, 0 otherwise.

pathNamecolumncount ?columnDesc?
If no additional arguments are given, the result is a decimal string giving the number of
columns created by the columncreate widget command which haven't been deleted by the
columndelete widget command; in this case the tail column is not counted. If columnDesc
is given, then the result is the number of columns that match that columndescription.

pathNamecolumncreate ?optionvalue...?
This command creates a new column in the treectrl widget. The new column is placed to the
right of all other columns (except the tail column). Any option-value arguments configure
the new column according to the columnconfigure command. The return value is the unique
identifier of the new column.

pathNamecolumndeletefirst ?last?
Deletes the specified column(s). First and last must be valid columndescriptions. If both
first and last are specified, then they may refer to a single column only. The tail column
cannot be deleted and it is an error to specify it. The order of first and last doesn't
matter, and first may be equal to last.

pathNamecolumndragcgetoption
Deprecated. Use headerdragcget instead.

pathNamecolumndragconfigure ?option? ?value? ?optionvalue...?
Deprecated. Use headerdragconfigure instead.

pathNamecolumnindexcolumnDesc
Deprecated. Use columnid instead.

pathNamecolumnidcolumnDesc
This command resolves the columndescriptioncolumnDesc into a list of unique column
identifiers. If the column(s) described by columnDesc don't exist, this command returns an
empty list.

pathNamecolumnlist ?-visible?
This command returns a list of identifiers for every column (except the tail) from left to
right. If -visible is given, only columns whose -visible option is true are returned.

pathNamecolumnmovecolumnDescbeforeDesc
Moves the column specified by columnDesc to the left of the column specified by beforeDesc.
Both columnDesc and beforeDesc must be valid columndescriptions. If beforeDesc is the
string tail, the column columnDesc will become the last column.

pathNamecolumnneededwidthcolumnDesc
This command returns a decimal string giving the needed width of the column specified by
the columndescriptioncolumnDesc. The needed width is the maximum of the width of the
column header and the width of the widest style in any visible item.

When an item style or column header spans multiple columns, the needed width of a column is
affected by the widths of other columns in the span, in which case the result of this
command isn't particularly useful.

pathNamecolumnordercolumnDesc ?-visible?
This command returns a decimal string giving the position of the column specified by the
columndescriptioncolumnDesc in the list of columns starting from zero for the leftmost
column. If -visible is given, only columns whose -visible option is true are considered,
and -1 is returned if columnDesc's -visible option is false.

pathNamecolumntagoption ?argarg...?
This command is used to manipulate tags on columns. The exact behavior of the command
depends on the option argument that follows the columntag argument. The following forms
of the command are supported:

pathNamecolumntagaddcolumnDesctagList
Adds each tag in tagList to the columns specified by the columndescriptioncolumnDesc. Duplicate tags are ignored. The list of tags for a column can also be
changed via a column's -tags option.

pathNamecolumntagexprcolumnDesctagExpr
Evaluates the tag expression tagExpr against every column specified by the columndescriptioncolumnDesc. The result is 1 if the tag expression evaluates to true for
every column, 0 otherwise.

pathNamecolumntagnamescolumnDesc
Returns a list of tag names assigned to the columns specified by the columndescriptioncolumnDesc. The result is the union of any tags assigned to the columns.

pathNamecolumntagremovecolumnDesctagList
Removes each tag in tagList from the columns specified by the columndescriptioncolumnDesc. It is not an error if any of the columns do not use any of the tags.
The list of tags for a column can also be changed via a column's -tags option.

pathNamecolumnwidthcolumnDesc
This command returns a decimal string giving the width in pixels of the column specified by
the columndescriptioncolumnDesc, even if the treectrl is configured to not display the
column headers by means of the -showheader option.

pathNamecompareitemDesc1opitemDesc2
Deprecated. Use the itemcompare command instead.

pathNameconfigure ?option? ?valueoptionvalue...?
Query or modify the configuration options of the widget. If no option is specified, returns a
list describing all of the available options for pathName (see Tk_ConfigureInfo for information on
the format of this list). If option is specified with no value, then the command returns a list
describing the one named option (this list will be identical to the corresponding sublist of the
value returned if no option is specified). If one or more option-value pairs are specified, then
the command modifies the given widget option(s) to have the given value(s); in this case the
command returns an empty string. Option may have any of the values accepted by the treectrl
command.

pathNamecontentbox
Returns a list with four elements giving the bounding box of the screen area used to display
items. This is the area of the window not including borders, column headers, or locked columns.
An empty string is returned if the display area has no height or width, which can happen if the
window is too small. The result of this command is the same as that of bboxcontent.

pathNamedebugoption ?argarg...?
This command is used to facilitate debugging of the treectrl widget. The exact behavior of the
command depends on the option argument that follows the debug argument. The following forms of
the command are supported:

pathNamedebugalloc
Returns a string giving partial statistics on memory allocations, if the package was built
with TREECTRL_DEBUG defined.

pathNamedebugcgetoption
This command returns the current value of the debugging option named option. Option may
have any of the values accepted by the debugconfigure widget command.

pathNamedebugconfigure ?option? ?value? ?optionvalue...?
This command is similar to the configure widget command except that it modifies debugging
options instead of modifying options for the overall treectrl widget. If no option is
specified, the command returns a list describing all of the available debugging options
(see Tk_ConfigureInfo for information on the format of this list). If option is specified
with no value, then the command returns a list describing the one named option (this list
will be identical to the corresponding sublist of the value returned if no option is
specified). If one or more option-value pairs are specified, then the command modifies the
given debugging option(s) to have the given value(s); in this case the command returns an
empty string.

The following debugging options are supported:

-displaydelaymillis
Specifies a time duration in milliseconds, which should be waited after something
has been drawn to the screen. Setting this option has only an effect, if the
debugging options -enable and -display are switched on.

-databoolean
If this option is switched on (together with the debugging option -enable), at
various places a consistence check on the internal data structure is made (e.g. for
every item is checked, if the registered number of children is equal to the number
of child items). If an inconsistency was found, a Tcl background error is raised.

-displayboolean
If this option is switched on (together with the debugging option -enable), at
varios places additional debugging output is printed to stdout.

-drawcolorcolor
When specified, areas of the window are painted with this color when drawing in
those areas is about to occur. Setting this option has only an effect if the
debugging options -enable and -display are switched on.

-enableboolean
All other debugging options only take effect if this option is also switched on.

-erasecolorcolor
When specified, areas of the window which have been marked as "invalid" (for
example, when part of the window is exposed) are painted with this color. If you
use an unusual color for this option (like pink), superflous screen redraws can be
spotted more easily. Setting this option has only an effect if the debugging
options -enable and -display are switched on.

-spanboolean
Debugging related to column spanning.

-textlayoutboolean
Debugging related to text-element layout.

pathNamedebugdinfooption
Returns a string describing display-related stuff. Option must be one of alloc, ditem,
onscreen or range.

pathNamedebugexposex1y1x2y2
Causes the area of the window bounded by the given window-coords to be marked as invalid.
This simulates uncovering part of the window.

pathNamedepth ?itemDesc?
If the additional argument itemDesc is given, then the result is a decimal string giving the depth
of the item described by itemDesc. If no itemDesc is specified, then the maximum depth of all
items in the treectrl widget is returned instead. Depth is defined as the number of ancestors an
item has.

pathNamedragimageoption ?arg...?
This command is used to manipulate the drag image, which is used to provide feedback when items
are drag-and-dropped within the window. The drag image is displayed as the dotted outlines of one
or more items, columns and/or elements. The exact behavior of the command depends on the option
argument that follows the dragimage argument. The following forms of the command are supported:

pathNamedragimageadditemDesc ?column? ?element?
Adds the shapes of the item described by itemDesc to the shapes of the dragimage.
Specifying additional arguments reduces the number of rectangles that are added to the
dragimage. If no additional arguments is specified, for every element of the item in every
column a dotted rectangles is added. If column is specified, all elements in other columns
are ignored. If also element is specified, only a rectangle for this one element of the
specified item in the given column is added.

pathNamedragimagecgetoption
This command returns the current value of the dragimage option named option. Option may
have any of the values accepted by the dragimageconfigure widget command.

pathNamedragimageclear
Removes all shapes (if there are any) from the dragimage. This command does not modify the
dragimage offset.

pathNamedragimageconfigure ?option? ?value? ?optionvalue...?
This command is similar to the configure widget command except that it modifies the
dragimage options instead of modifying options for the overall treectrl widget. If no
option is specified, the command returns a list describing all of the available dragimage
options (see Tk_ConfigureInfo for information on the format of this list). If option is
specified with no value, then the command returns a list describing the one named dragimage
option (this list will be identical to the corresponding sublist of the value returned if
no option is specified). If one or more option-value pairs are specified, then the command
modifies the given dragimage option(s) to have the given value(s); in this case the command
returns an empty string.

The following dragimage options are supported:

-visibleboolean
Specifies a boolean value which determines whether the dragimage should currently be
visible.

pathNamedragimageoffset ?xy?
Returns a list containing the x and y offsets of the dragimage, if no additional arguments
are specified. The dragimage offset is the screen distance the image is displayed at
relative to the item(s) its shape is derived from. If two coordinates are specified, sets
the dragimage offset to the given coordinates x and y.

pathNameelementoption ?element? ?argarg...?
This command is used to manipulate elements (see ELEMENTSANDSTYLES below). The exact behavior
of the command depends on the option argument that follows the element argument. The following
forms of the command are supported:

pathNameelementcgetelementoption
This command returns the current value of the option named option associated with the
element given by element. Option may have any of the values accepted by the elementconfigure widget command.

This command also accepts the -statedomain option.

pathNameelementconfigureelement ?option? ?value? ?optionvalue...?
This command is similar to the configure widget command except that it modifies options
associated with the element given by element instead of modifying options for the overall
treectrl widget. If no option is specified, the command returns a list describing all of
the available options for element (see Tk_ConfigureInfo for information on the format of
this list). If option is specified with no value, then the command returns a list
describing the one named option (this list will be identical to the corresponding sublist
of the value returned if no option is specified). If one or more option-value pairs are
specified, then the command modifies the given option(s) to have the given value(s) in
element; in this case the command returns an empty string. See ELEMENTSANDSTYLES below
for details on the options available for elements.

pathNameelementcreatenametype ?optionvalue...?
Creates a new master element of type type with the unique user-defined name name and
configures it with zero or more option/value pairs. See the subsections on individual
element types in ELEMENTSANDSTYLES for the options that are valid for each type of
element. This command returns the name of the new element (the same as the name argument).

This command also accepts the -statedomain option with a value of either header or item to
specify where this element will be displayed.

pathNameelementdelete ?element...?
Deletes each of the named elements and returns an empty string. If an element is deleted
while it is still configured as an element of one or more styles by means of the styleelements widget command, it is also removed from the element lists of these styles.

pathNameelementnames
Returns a list containing the names of all existing elements.

pathNameelementperstateelementoptionstateList
This command returns the value of the per-state option named option for element for a
certain state. StateList is a list of state names (static and dynamic, see STATES) which
specifies the state to use.

pathNameelementtypeelement
Returns the type of the element given by element, such as rect or text.

pathNameexpand ?-recurse? ?itemDesc...?
Deprecated. Use itemexpand instead.

pathNamegradientoption ?arg...?
This command is used to manipulate color gradients. See GRADIENTS for more information about
using gradients. The exact behavior of the command depends on the option argument that follows
the gradient argument. The following forms of the command are supported:

pathNamegradientcgetgradientoption
Returns the current value of the configuration option for the gradient specified by
gradient whose name is option. Option may have any of the values accepted by the gradientconfigure command.

pathNamegradientconfiguregradient ?optionvalue...?
If no option is specified, the command returns a list describing all of the available
gradient options (see Tk_ConfigureInfo for information on the format of this list). If
option is specified with no value, then the command returns a list describing the one named
gradient option (this list will be identical to the corresponding sublist of the value
returned if no option is specified). If one or more option-value pairs are specified, then
the command modifies the given gradient option(s) to have the given value(s); in this case
the command returns an empty string.

The following options are supported (see gradientcreate for the meaning of each option):

-bottomcoordSpec-leftcoordSpec-orientdirection-rightcoordSpec-stepsstepCount-stopsstopsList-topcoordSpecpathNamegradientcreatename ?optionvalue...?
Creates a new gradient with the name name, which must be a unique name not used by another
gradient created by this treectrl widget.

The following options are supported:

-bottomcoordSpec-leftcoordSpec-rightcoordSpec-topcoordSpec
Each of these options specifies one edge of the gradient brush. If the option is
specified as an empty string (the default), the gradient brush's edge is the same as
that of whatever rectangle is being painted using the gradient. See GRADIENTCOORDINATES for details on gradient brush coordinates.

The format of each of these options is a list of 2 or more values {value coordType
?arg ...?}, where value is a floating point number (usually from 0.0 to 1.0) and
coordType is one of area, canvas, column or item. The area keyword must be followed
by one of the same area names that the bbox command accepts. The column keyword may
be followed by a column description specifying exactly one column. The item keyword
may be followed by an item description specifying exactly one item.

-orientdirection
This option specifies the direction a linear gradient changes color in. Must be
either horizontal (the default) or vertical or an abbreviation of one of these.

-stepsstepCount
Specifies the number of bands of color drawn for each color stop described by the
-stops option. The default value is 1, the maximum is 25. This option has no
effect if gradients are drawn using something better than Tk API calls. See
GRADIENTS for more on this.

-stopsstopsList
Specifies the color stops along this gradient. The argument stopsList has the
following form:

{{offset color ?opacity?} {offset color ?opacity?} ...}

Each offset is a floating point number from 0.0 to 1.0 specifying the distance from
the start of the gradient where the color begins. Each color is a Tk color name or
description. Each optional opacity is a floating point number from 0.0 to 1.0
specifying how transparent the gradient is.

If stopsList is non-empty there must be at least two stops specified, and the first
offset must be 0.0 and the last offset must be 1.0. Any other stop offsets must be
listed in increasing order. Specifying opacity has no effect if gradients are drawn
using Tk API calls. See GRADIENTS for more on this.

pathNamegradientdelete ?name...?
Deletes each gradient specified by name. If the gradient is still being used then it is
not actually deleted until all elements etc using the gradient have stopped using it. A
deleted-but-in-use gradient is not recognized by the various gradient commands. Creating a
new gradient with the same name as a deleted-but-in-use gradient resurrects the deleted
gradient.

pathNamegradientnames
Returns a list of names of all the gradients that have been created by this treectrl
widget.

pathNamegradientnative ?preference?
Without any arguments, this command returns a boolean indicating whether or not the
platform supports native transparent gradients. The preference argument is a boolean that
indicates whether native gradients should be used; this can be used to test the appearance
of the application.

pathNameheaderoption ?arg...?
This command is used to manipulate column headers. The exact behavior of the command depends on
the option argument that follows the header argument. The following forms of the command are
supported:

pathNameheaderbboxheaderDesc ?column? ?element?
See the itembbox command.

pathNameheadercompareheaderDesc1opheaderDesc2
See the itemcompare command.

pathNameheaderconfigureheaderDesc ?arg...?
There are two forms of this command distinguished by whether or not a columndescription
appears after the headerDesc argument. If the first argument after headerDesc begins with
a '-' character it is assumed to be an option name, not a column description, in which case
the command applies to the header-row. If the first argument after headerDesc does not
being with a '-' it is assumed to be a column description, in which case the command
applies to a header-column.

pathNameheaderconfigureheaderDesc ?option? ?value? ?optionvalue...?
If no option is specified, returns a list describing all of the available options
for the header given by headerDesc (see Tk_ConfigureInfo for information on the
format of this list). If option is specified with no value, then the command returns
a list describing the one named option (this list will be identical to the
corresponding sublist of the value returned if no option is specified).

If one or more option-value pairs are specified, then the command modifies the given
option(s) to have the given value(s); in this case the command returns an empty
string. This is the only case where headerDesc may refer to multiple header-rows.

The following options are supported by this command (see headercreate for the
meaning of each option):

-heightheight-tagstagList-visiblebooleanpathNameheaderconfigureheaderDesccolumn ?option? ?value? ?optionvalue...?
If no option is specified, returns a list describing all of the available options
for the single column column of the header-row given by headerDesc (see
Tk_ConfigureInfo for information on the format of this list). If option is
specified with no value, then the command returns a list describing the one named
option (this list will be identical to the corresponding sublist of the value
returned if no option is specified).

The following options are supported by this command (see HEADERS) for the meaning of
each option):

-arrowdirection-arrowbitmapbitmap-arrowgravitydirection-arrowimageimage-arrowpadxamount-arrowpadyamount-arrowsideside-backgroundcolor-bitmapbitmap-borderwidthsize-buttonboolean-fontfontName-imageimage-imagepadxamount-imagepadyamount-justifyjustification-statestate-texttext-textcolorcolor-textlinescount-textpadxamount-textpadyamountpathNameheadercount ?headerDesc?
If no additional arguments are given, the result is a decimal string giving the number of
header-rows created by the headercreate widget command which haven't been deleted by the
headerdelete widget command, plus 1 for the ever-present top header-row created along with
the widget. If the optional argument headerDesc is given, then the result is the number of
header-rows that match that headerdescription.

pathNameheadercreate ?optionvalue?
Creates a new header-row and returns its unique identifier. The following configuration
options are supported:

-heightheight
Specifies a fixed height for the header-row in any of the forms acceptable to
Tk_GetPixels. Must be >= 0. If height is zero then the header-row's height is the
maximum height of all of its column headers. Defaults to 0.

-tagstagListTagList is a list of tag names to be added to the new header-row. The headertag
command can also be used to manipulate this list of tags.

-visiblebooleanBoolean must have one of the forms accepted by Tcl_GetBoolean. It indicates whether
or not the header-row should be displayed. If the widget option -showheader is
false then the header-row will not be displayed regardless of the value of this
option.

pathNameheaderdeleteheaderDesc
Deletes the header-rows given by the headerdescriptionheaderDesc. Attempts to delete the
ever-present top header-row are ignored without raising an error.

pathNameheaderdragcget ?arg...?
There are two forms of this command distinguished by whether or not a headerdescription
appears as the first argument. If the first argument begins with a '-' character it is
assumed to be an option name, not a header description, in which case the command applies
to the header-drag-and-drop options for the widget. If the first argument does not being
with a '-' it is assumed to be a header description, in which case the command applies to a
header-row.

pathNameheaderdragcgetoption
This command returns the current value of the header-drag-and-drop option named
option for the widget. The following configuration options are supported (see
headerdragconfigure for the meaning of each option):

-enableboolean-imagealphaalpha-imagecolorbackground-imagecolumncolumn-imageoffsetoffset-imagespancount-indicatorcolorcolor-indicatorcolumncolumn-indicatorsideside-indicatorspancountpathNameheaderdragcgetheaderDescoption
This command returns the current value of the header-drag-and-drop option named
option for a header-row. The following configuration options are supported (see
headerdragconfigure for the meaning of each option):

-drawboolean-enablebooleanpathNameheaderdragconfigure ?arg...?
There are two forms of this command distinguished by whether or not a headerdescription
appears as the first argument. If the first argument begins with a '-' character it is
assumed to be an option name, not a header description, in which case the command applies
to the header-drag-and-drop options for the widget. If the first argument does not being
with a '-' it is assumed to be a header description, in which case the command applies to a
header-row.

pathNameheaderdragconfigure ?option? ?value? ?optionvalue...?
This command queries and sets header-drag-and-drop options for the widget, not for
individual header-rows. The following configuration options are supported:

-enableboolean
Controls whether the user is allowed to rearrange columns by drag-and-drop.
The default is false. Each header-row also has an -enable dragconfigure
option.

-imagealphaalphaAlpha is an integer from 0 (invisible) to 255 (opaque) controlling the
transparency of the drag image. Any value outside this range is clipped. The
default is 200.

-imagecolorbackground
Unused.

-imagecolumncolumnColumn specifies the column to create the drag image from.

-imageoffsetoffsetOffset is the horizontal screen distance the drag image is offset from its
starting position.

-imagespancountCount is the number of columns, starting with -imagecolumn, that will be
dragged as a group.

-indicatorcolorcolor
Unused.

-indicatorcolumncolumn
The 2-pixel-thick line will be drawn over the left or right edge of column.

-indicatorsideside
Unused.

-indicatorspancountCount is the number of columns, starting with -indicatorcolumn, that will be
displaced as a group by the dragged column(s)

pathNameheaderdragconfigureheader ?option? ?value? ?optionvalue...?
This command queries and sets header-drag-and-drop options for header-rows, not for
the widget as a whole. The following configuration options are supported:

-drawboolean
Controls whether a header-row displays any feedback during header drag-and-
drop. The default is true.

-enableboolean
Controls whether clicking and dragging in this header-row initiates drag-and-
drop. The default is true. If the -enable option for the widget is false
(see above) then this option has no effect.

pathNameheaderelement ?arg...?
See the itemelement command.

pathNameheaderidheaderDesc
This command resolves the headerdescriptionheaderDesc into a list of unique header-row
identifiers. If headerDesc doesn't refer to any existing header-rows, then this command
returns an empty list.

pathNameheaderimageheaderDesc ?column? ?image? ?columnimage...?
The behavior of this command depends on whether or not a column header was assigned a style
containing an image element. If a column header has no style or no style with an image
element then this command operates on the same -image option as headerconfigure.
Otherwise this command operates on the -image option of the first image element in a column
header's style. See the itemimage command.

pathNameheaderspanheaderDesc ?column? ?numColumns? ?columnnumColumns...?
See the itemspan command.

pathNameheaderstatecommandheaderDesc ?arg...?
See the itemstate command.

pathNameheaderstylecommandheaderDesc ?arg...?
See the itemstyle command.

pathNameheadertextheaderDesc ?column? ?text? ?columntext...?
The behavior of this command depends on whether or not a column header was assigned a style
containing a text element. If a column header has no style or no style with a text element
then this command operates on the same -text option as headerconfigure. Otherwise this
command operates on the -text option of the first text element in a column header's style.
See itemtext.

pathNameheadertagcommandheaderDesc ?arg...?
See the itemtag command.

pathNameidentify ?-arrayvarName? xy
This command returns information about the what is displayed at the given window coordinates x and
y. When the -array option is used to specify the name of an array variable, elements of the array
variable are set as follows:

[1] If the coordinates are outside the window, over the borders, or over any whitespace in the
window, then:

$varName(where) is ""

[2] If the coordinates are over a column header, then:

$varName(where) is header

$varName(header) is the unique id of the header-row

$varName(column) is the unique id of the column

$varName(element) is the name of an element, or ""

$varName(side) is left or right if the coordinates are close to the edge of the column
header, otherwise ""

[3] If the coordinates are over an item, then:

$varName(where) is item

$varName(item) is the unique id of the item

$varName(column) is the unique id of the column

$varName(element) is the name of an element, or ""

$varName(button) is a boolean indicating whether or not the coordinates are over the item's
expand/collapse button

$varName(line) is the unique id of an ancestor of the item (but not the parent of the item)
if the coordinates are over a line descending from that ancestor. If the coordinates are
not over such a line then $varName(line) is "". This is used to collapse the ancestor when
the line is clicked on.
When the -array option is not used, this command returns a list describing what is displayed at the given
window coordinates. The format of this list can be like one of the following:

[1] {}

An empty list is returned if the coordinates are outside the window, over the borders, or
over any whitespace in the window.

[2] header C ?left|right?

header C elem E ?left|right?

header H column C ?left|right?

header H column C elem E ?left|right?

Only when there is more than one header-row is there a unique id of a header-row H followed
by the keyword column. This is for compatibility with older versions when there was only
one row of column headers allowed.

[3] item I column C

[4] item I column C elem E

[5] item I button

This is the result when the coordinates are over the expand/collapse button next to an
item.

[6] item I line I2

This is the result when the coordinates are over a line descending from an ancestor I2 of
the item I (but not the parent of that item). This is used to collapse the ancestor when
the line is clicked on.

pathNameindexitemDesc
Deprecated. Use itemid instead.

pathNameitemoption ?arg...?
This command is used to manipulate items. The exact behavior of the command depends on the option
argument that follows the item argument. The following forms of the command are supported:

pathNameitemancestorsitemDesc
Returns a list containing the item ids of the ancestors of the item specified by itemDesc.
The first list value is the parent, the second is the parent's parent, an so on. The last
list value will be the root item if itemDesc is a descendant of the root item.

pathNameitembboxitemDesc ?column? ?element?
Returns a list with four elements giving the bounding box of the item described by
itemDesc. If no further argument is specified, the bbox spans the area of the item over all
non-locked columns. If a column is specified, only the area of the item in this column is
considered. If an additional element is specified, the area of this element in column of
the specified item is returned. The returned coordinates are relative to the top-left
corner of the widget. If the item is not visible for any reason, the result in an empty
string.

pathNameitembuttonstateitemDesc ?state?
If state is specified, this command sets the state of the expand/collapse button for the
single item specified by itemDesc. The state argument may be one of active, normal or
pressed. The current (or newly-set) state of the button is returned. The button state is
used by the system theme, if any, to change the appearance of the button.

pathNameitemcgetitemDescoption
Returns the current value of the configuration option for the item specified by itemDesc
whose name is option. Option may have any of the values accepted by the itemconfigure
command.

pathNameitemchildrenitemDesc
Returns a list containing the item ids of all children of the item specified by itemDesc in
the correct order from the first child to the last child.

pathNameitemcollapseitemDesc ?-animate? ?-recurse?
Switches off the open state of the item(s) described by itemDesc. If an item has
descendants, then they are no longer displayed. If an item is already closed, then this
command has no effect on that item. If -animate is specified, then the item's button will
animate as it transitions between states if the theme supports it; in this case only one
item may be specified. If -recurse is specified, then all descendants of the items
described by itemDesc will also be collapsed. For every item that actually will be
collapsed, two events are generated: a <Collapse-before> event before the item state is
changed, and a <Collapse-after> event after the item state was changed.

pathNameitemcompareitemDesc1opitemDesc2
From both items described by the itemDescs the index is retrieved (as returned from the
itemorder widget command). Then these indexes are compared using the operator op, which
must be either <, <=, ==, >=, >, or !=. The return value of this command is 1 if the
comparison evaluated to true, 0 otherwise.

pathNameitemcomplexitemDesc ?list...?
This horrible command is now deprecated. Use itemelementconfigure instead. For every
column of the treectrl there may be specified one list. Each list should look like this:

{ {element option value ...} {element option value ...} ...}

Every option must be known by the element's type (see ELEMENTSANDSTYLES below). Each
option will be set to value for the element in this one column in this item.

pathNameitemconfigureitemDesc ?option? ?value? ?optionvalue...?
If no option is specified, returns a list describing all of the available options for the
item given by itemDesc (see Tk_ConfigureInfo for information on the format of this list).
If option is specified with no value, then the command returns a list describing the one
named option (this list will be identical to the corresponding sublist of the value
returned if no option is specified).

If one or more option-value pairs are specified, then the command modifies the given item
option(s) to have the given value(s); in this case the command returns an empty string.
This is the only case where itemDesc may refer to multiple items.

The following options are supported by this command (see itemcreate for the meaning of
each option):

-buttonboolean|auto-heightheight-tagstagList-visibleboolean-wrapbooleanpathNameitemcount ?itemDesc?
If no additional arguments are given, the result is a decimal string giving the number of
items created by the itemcreate widget command which haven't been deleted by the itemdelete widget command, plus 1 for the ever-present root item. If the optional argument
itemDesc is given, then the result is the number of items that match that itemdescription.

pathNameitemcreate ?optionvalue...?
Creates some new items and optionally returns a list of unique identifiers for those items.
The new items have the states open and enabled set by default. If the treectrl widget
currently has the focus, the state focus is also set.

The following options are supported by this command:

-buttonboolean|auto
The value of this option must have one of the forms accepted by Tcl_GetBoolean or be
the word auto (or any abbreviation of it). It indicates whether or not an
expand/collapse button should be drawn next to the item, typically to indicate that
the item has children. If the value of this option is auto, then a button is
displayed next to the item whenever the item has any children whose item option
-visible is true. The button will only be displayed if:

[1] the column specified by the treectrl option -treecolumn is visible, and

[2] the treectrl option -showbuttons is true, and

[3] for the root item, the treectrl option -showrootbutton is true, and

[4] for immediate children of the root item, the treectrl option
-showrootchildbuttons is true.

-countnumItems
Specifies the number of items to create. Must be >= 0. Defaults to 1.

-enabledboolean
Specifies whether the items should be enabled. Default is true.

-heightheight
Specifies a fixed height in any of the forms acceptable to Tk_GetPixels. Must be >=
0. If height is zero then the item's height is unspecified. Defaults to 0. See
also the widget options -itemheight and -minitemheight.

-nextsiblingitemDesc
Specifies the item before which the new items will be inserted. The new items will
have the same parent as itemDesc.

-openboolean
Specifies whether the items should be open or closed. Default is true.

-parentitemDesc
Specifies the item which the new items will be the children of. The new items will
be appended to the list of children of itemDesc. When no parent is specified, the
new items are orphan items (see the widget command orphans) and will not be
displayed in the list.

-prevsiblingitemDesc
Specifies the item after which the new items will be inserted. The new items will
have the same parent as itemDesc.

-returnidboolean
Specifies whether or not to return a list of item identifiers for the newly created
items. Specifying false is useful when creating a large number of items in the
console or to improve performance. Default is true.

-tagstagListTagList is a list of tag names to be added to the new items. The itemtag command
can also be used to manipulate this list of tags.

-visiblebooleanBoolean must have one of the forms accepted by Tcl_GetBoolean. It indicates that the
item should be displayed in the list. The item will only be displayed if:

[1] each ancestor is a descendant of the root item (not an orphan), and

[2] each ancestor's -visible option is true

-wrapbooleanBoolean must have one of the forms accepted by Tcl_GetBoolean. It indicates that
this item should be the first one in a horizontal range or vertical range of items.
See also the widget option -wrap.

pathNameitemdeletefirst ?last?
Deletes the specified item(s). First and last must be valid itemdescriptions. If last
isn't specified, then first may specify multiple items. If both first and last are
specified, they must each decribe a single item with a common ancestor; then the range of
items between first and last is deleted. The order of first and last doesn't matter.

Deleting an item deletes any child items of the deleted item recursively. If the current
active item is deleted, the root item becomes the new active item. If the current
selection anchor item is deleted, the root item becomes the new anchor item. There is no
way to delete the root item of the treectrl widget; in all cases the specification of the
root item is ignored.

For each call to this command, two events may be generated. If any of the deleted items
are selected, then they are removed from the selection and a <Selection> event is generated
just before the items are deleted. If any items are going to be deleted, then an
<ItemDelete> event is generated just before the items are deleted.

pathNameitemdescendantsitemDesc
Returns a list containing the item ids of the descendants of the item specified by
itemDesc, i.e. the children, grandchildren, great-grandchildren etc, of the item.

pathNameitemdumpitemDesc
Debug command. Returns a list with 4 words in the form indexindexindexVisindexVis.

pathNameitemelementcommanditemDesccolumnelement ?arg...?
This command is used to manipulate elements of the item. The exact behavior of the command
depends on the command argument that follows the element argument. The following forms of
the command are supported:

pathNameitemelementactualitemDesccolumnelementoption
Deprecated. Use itemelementperstate instead.

pathNameitemelementcgetitemDesccolumnelementoption
This command returns the value of the option named option associated with element
inside column of the item described by itemDesc, if it was already configured for
the actual item. Option may have any of the values accepted by the type of the
specified element (see ELEMENTSANDSTYLES below)

pathNameitemelementconfigureitemDesccolumnelement ?option? ?value? ?optionvalue...?
This command modifies configuration options for an element in a column of an item.
If no option is specified, the command returns a list describing all of the
available options for the element (see Tk_ConfigureInfo for information on the
format of this list). If option is specified with no value, then the command
returns a list describing the one named option (this list will be identical to the
corresponding sublist of the value returned if no option is specified).

If one or more option-value pairs are specified, then the command modifies the given
option(s) to have the given value(s) in the element inside column of the item(s)
described by itemDesc; in this case the command returns an empty string. This is the
only case where itemDesc may refer to multiple items.

It is possible to configure multiple elements in multiple columns with a single
call. To configure another element in the same column, append a ´+' argument
followed by the element name. To configure elements in another column, append a ','
argument followed by the column. For example:

.t item element configure $I \
$C1 $E1 -text "hello" + $E2 -text "world" , \
$C2 $E3 -fill Blue , \
$C3 $E1 -text "apples and oranges"

Each of the columndescription arguments to this command may refer to multiple
columns if at least one option-value pair is given.

pathNameitemelementperstateitemDesccolumnelementoption ?stateList?
This command returns the current value of the per-state option named option for
element inside column of the item described by itemDesc. If stateList is specified,
the list of state names (static and dynamic, see STATES) is used in place of the
current state for item and column.pathNameitemenableditemDesc ?boolean?
Returns 1 if the item described by itemDesc has the state enabled switched on, 0 otherwise.
If boolean is specified, then the enabled state of every item described by the itemdescriptionitemDesc is set accordingly. New items are enabled by default when created.
Disabled items cannot be selected, and are ignored by the default key-navigation and mouse
bindings.

pathNameitemexpanditemDesc ?-animate? ?-recurse?
Switches on the open state of the item(s) described by itemDesc. If an item has
descendants, then they are now displayed. If an item is already open, then this command
has no effect on that item. If -animate is specified, then the item's button will animate
as it transitions between states if the theme supports it; in this case only one item may
be specified. If -recurse is specified, then all descendants of the items described by
itemDesc will also be expanded. For every item that actually will be expanded, two events
are generated: an <Expand-before> event before the item state is changed, and an <Expand-after> event after the item state was changed.

pathNameitemfirstchildparent ?child?
If child is not specified, returns the item id of the first child of the item described by
parent. If child is specified, it must describe an item that is neither the root item nor
an ancestor of parent. Then it will become the new first child of parent.

pathNameitemiditemDesc
This command resolves the itemdescriptionitemDesc into a list of unique item identifiers.
If itemDesc doesn't refer to any existing items, then this command returns an empty list.

pathNameitemimageitemDesc ?column? ?image? ?columnimage...?
This command sets or retrieves the value of the per-state -image option for the first image
element in one or more columns. If no column is specified, this command returns a list of
values, one per column. If no image is specified, this command returns the value for
column.

If one or more column-image pairs is specified, then the value of the -image option in each
column is set to image. In this case itemDesc may refer to multiple items and each column
may refer to multiple columns.

Note that this command is provided as a convenience. Use the itemelementconfigure or itemelementcget commands if you want to set or retrieve the value of the -image option for a
specific image element.

pathNameitemisancestoritemDescdescendant
Returns 1 if the item described by itemDesc is a direct or indirect parent of the item
decribed by descendant, 0 otherwise.

pathNameitemisopenitemDesc
Returns 1 if the item described by itemDesc has the state open switched on, 0 otherwise.

pathNameitemlastchildparent ?child?
If child is not specified, returns the item id of the last child of the item described by
parent. If child is specified, it must describe an item that is not an ancestor of parent.
Then it will become the new last child of parent.

pathNameitemnextsiblingsibling ?next?
If next is not specified, returns the item id of the next sibling of the item described by
sibling. If next is specified, it must describe an item that is not an ancestor of
sibling. Then it will become the new next sibling of sibling.

pathNameitemnumchildrenitemDesc
Returns the number of children of the item described by itemDesc.

pathNameitemorderitemDesc ?-visible?
This command returns the position of the item itemDesc relative to its toplevel ancestor
(usually the root item, unless the ancestor is an orphan). If you imagine all the items
flattened into a vertical list, the result of this command is the row the item falls in. If
the optional argument -visible is given, only the items whose ancestors are expanded, and
whose -visible option is true, get counted; in this case -1 is returned if the item is not
visible.

pathNameitemparentitemDesc
Returns the item id of the parent of the item described by itemDesc.

pathNameitemprevsiblingsibling ?prev?
If prev is not specified, returns the item id of the previous sibling of the item described
by sibling. If prev is specified, it must describe an item that is not an ancestor of
sibling. Then it will become the new previous sibling of sibling.

pathNameitemrangefirstlast
Returns a list containing the item ids of all items in the range between first and last,
inclusive. The order between first and last doesn't matter, and the result is always
sorted by the increasing order of the items (as returned by the itemorder command). The
items specified by first and last must share a common ancestor.

pathNameitemremoveitemDesc
Removes the item described by itemDesc from the list of children of its parent, so that it
will become an orphan.

pathNameitemrncitemDesc
Returns a list of two integers, which corresponds to the row and column of the item
described by itemDesc. The row and column corresponds to the on-screen arrangement of items
as determined by the -orient and -wrap options. If the item is not displayed, this command
returns an empty string.

pathNameitemsortitemDesc ?option...?
Sorts the children of the item described by itemDesc, and redisplays the tree with the
items in the new order.

The range of items which should be sorted can be restricted by means of the -first and/or
-last options, which should be children of the item described by itemDesc; the order
between these two limiting items doesn't matter.

The sort column can be specified by means of the -column option; this option can be used
repeatedly to define a multicolumn sort. The sorting is done by looking at the text of the
element specified by the -element option, which must be a text element defined in the style
of the sorting column, by default the first text element is used.

If the -notreally option is specified, no rearranging of the items is done; instead the
sorted items are returned as result of the command.

By default ASCII sorting is used with the result returned in increasing order. Any of the
following options may be specified to control the sorting process of the previously
specified column (unique abbreviations are accepted):

-ascii Use string comparison with ASCII collation order. This is the default.

-commandcommand
Use command as a comparison command. To compare two items, evaluate a Tcl script
consisting of command with the numerical ids of the two items appended as additional
arguments. The script should return an integer less than, equal to, or greater than
zero if the first item is to be considered less than, equal to, or greater than the
second, respectively.

-decreasing
Sort the items in decreasing order ("largest" items first).

-dictionary
Use dictionary-style comparison. This is the same as -ascii except (a) case is
ignored except as a tie-breaker and (b) if two strings contain embedded numbers, the
numbers compare as integers, not characters. For example, in -dictionary mode,
bigBoy sorts between bigbang and bigboy, and x10y sorts between x9y and x11y.

-increasing
Sort the items in increasing order ("smallest" items first). This is the default.

-integer
Convert to integers and use integer comparison.

-real Convert to floating-point values and use floating comparison.

pathNameitemspanitemDesc ?column? ?numColumns? ?columnnumColumns...?
This command sets or retrieves the number of columns that a style covers. If no column is
specified, the return value is a list of spans, one per column. If no numColumns is
specified, the return value is the span for column.

If one or more column-numColumns pairs is specified, the span for each column is set to
numColumns. In this case itemDesc may refer to multiple items and each column may refer to
multiple columns.

pathNameitemstatecommanditemDesc ?arg...?
This command is used to manipulate the states of an item. The exact behavior of the
command depends on the command argument that follows the style argument. The following
forms of the command are supported:

pathNameitemstatedefinestateName
Defines a new state with the name stateName, which must not be the name of an
existing state.

pathNameitemstateforcolumnitemDesccolumn ?stateDescList?
Just like itemstateset but manipulates dynamic states for a single item column,
not the item as a whole. If stateDescList is unspecified, this command returns a
list containing the names of all the dynamic states which are switched on in column.

If stateDescList is specified, then itemDesc may refer to multiple items and column
may refer to multiple columns.

pathNameitemstategetitemDesc ?stateName?
If no stateName is specified, returns a list containing the names of all (static and
dynamic) states which are currently switched on for the item described by itemDesc.
If a stateName is specified, 1 is returned if the specified state is currently
switched on for the item, 0 otherwise.

pathNameitemstatelinkagestateName
Returns a string indicating whether the specified state is user-defined by means of
the itemstatedefine widget command (dynamic) or predefined by the treectrl widget
itself (static).

pathNameitemstatenames
Returns a list containing the names of all user-defined states.

pathNameitemstatesetitemDesc ?lastItem? stateDescList
Every element of stateDescList must be the name of a dynamic state (see STATES
below), optionally preceded by a ~ or ! character. Every state with a leading !
will be switched off for the item described by itemDesc, every state with a leading
~ will be toggled, and every state without leading ! or ~ will be switched on. If
lastItem is specified, the state changes will be made for all items in the range
between itemDesc and lastItem. If lastItem unspecified, then the state changes are
made for all items described by itemDesc.

pathNameitemstateundefine ?stateName...?
Every stateName must be the name of a user-defined state. Removes this state from
the list of user-defined states.

pathNameitemstylecommanditemDesc ?arg...?
This command is used to manipulate the styles of an item. The exact behavior of the
command depends on the command argument that follows the style argument. The following
forms of the command are supported:

pathNameitemstyleelementsitemDesccolumn
This command returns a list containing the names of elements which were configured
by the itemelementconfigure command for the item described by itemDesc in column.
If there is no style assigned to column an error is returned.

pathNameitemstylemapitemDesccolumnstylemap
Like the itemstyleset command, this command may be used to assign a style to a
specific column of an item. Unlike itemstyleset, this command can transfer
configuration values of elements in the current style to elements in the new style
specified by style. Map must be a list of elementOld-elementNew pairs, where
elementOld is an element in the current style, and elementNew is an element in the
style specified by style. Both elementOld and elementNew must be of the same type
(bitmap, text etc). ItemDesc may refer to multiple items and column may refer to
multiple columns.

pathNameitemstylesetitemDesc ?column? ?style? ?columnstyle...?
This command sets or retrieves the style assigned to one or more columns. If no
column is specified, this command returns a list containing the names of the styles
set for all columns of the item described by itemDesc. If no style is specified,
this command returns the name of the style set for the item described by itemDesc in
column.

If one or more column-style pairs is specified, then the style in each column is set
to style. In this case itemDesc may refer to multiple items and each column may
refer to multiple columns.

pathNameitemtagoption ?argarg...?
This command is used to manipulate tags on items. The exact behavior of the command
depends on the option argument that follows the itemtag argument. The following forms of
the command are supported:

pathNameitemtagadditemDesctagList
Adds each tag in tagList to the items specified by the itemdescriptionitemDesc.
Duplicate tags are ignored. The list of tags for an item can also be changed via an
item's -tags option.

pathNameitemtagexpritemDesctagExpr
Evaluates the tag expression tagExpr against every item specified by the itemdescriptionitemDesc. The result is 1 if the tag expression evaluates to true for
every item, 0 otherwise.

pathNameitemtagnamesitemDesc
Returns a list of tag names assigned to the items specified by the itemdescriptionitemDesc. The result is the union of any tags assigned to the items.

pathNameitemtagremoveitemDesctagList
Removes each tag in tagList from the items specified by the itemdescriptionitemDesc. It is not an error if any of the items do not use any of the tags. The
list of tags for an item can also be changed via an item's -tags option.

pathNameitemtextitemDesc ?column? ?text? ?columntext...?
This command sets or retrieves the value of the -text option for the first text element in
one or more columns. If no column is specified, this command returns a list of values, one
per column. If no text is specified, this command returns the value for column.

If one or more column-text pairs is specified, then the value of the -text option in each
column is set to text. In this case itemDesc may refer to multiple items and each column
may refer to multiple columns.

Note that this command is provided as a convenience. Use the itemelementconfigure or itemelementcget commands if you want to set or retrieve the value of the -text option for a
specific text element.

pathNameitemtoggleitemDesc ?-animate? ?-recurse?
Changes the open state of the item(s) described by itemDesc. If the open state is
currently switched off, then this command does the same as the itemexpand widget command;
otherwise the same as the itemcollapse widget command. If -animate is specified, then the
item's button will animate as it transitions between states if the theme supports it; in
this case only one item may be specified. If -recurse is specified, then the open state of
all descendants of the items described by itemDesc will also be toggled.

pathNamemarqueeoption ?arg...?
This command is used to manipulate the marquee, which can be used to implement a resizable
selection rectangle, in a file browser for example. One corner point of the marquee is fixed as
long as the marquee is visible and called the anchor; the diagonally opposite corner is dragged
with the mouse while resizing the marquee and simply called the corner.

All coordinates handled by this widget command are canvas coordinates, i.e. the canvasx or canvasy
widget command should be used to translate window coordinates to canvas coordinates.

By default, the marquee is displayed as a 1-pixel thick dotted rectangle. If either of the -fill
or -outline options is specified, then the marquee is drawn as a filled and/or outlined rectangle
of the specified color(s). The -fill option should specify a transparent gradient to avoid
hiding what is inside the marquee. See GRADIENTS for more info.

The exact behavior of the command depends on the option argument that follows the marquee
argument. The following forms of the command are supported:

pathNamemarqueeanchor ?xy?
Returns a list containing the x and y coordinates of the anchor, if no additional arguments
are specified. If two coordinates are specified, sets the anchor to the given coordinates
x and y.

pathNamemarqueecgetoption
This command returns the current value of the marquee option named option. Option may have
any of the values accepted by the marqueeconfigure widget command.

pathNamemarqueeconfigure ?option? ?value? ?optionvalue...?
This command is similar to the configure widget command except that it modifies the marquee
options instead of modifying options for the overall treectrl widget. If no option is
specified, the command returns a list describing all of the available marquee options (see
Tk_ConfigureInfo for information on the format of this list). If option is specified with
no value, then the command returns a list describing the one named marquee option (this
list will be identical to the corresponding sublist of the value returned if no option is
specified). If one or more option-value pairs are specified, then the command modifies the
given marquee option(s) to have the given value(s); in this case the command returns an
empty string.

The following marquee options are supported:

-fillcolor
Specifies the color to fill the marquee rectangle with. See the comments above
about using a transparent gradient here.

-outlinecolor
Specifies the color to outline the marquee rectangle with.

-outlinewidthcolor
Specifies the width of the outline drawn inside the marquee's rectangle. The
outline is not drawn if this value is less than 1. This option has no effect if the
-outline option is unspecified, i.e., the default dotted rectangle is unaffected by
this option. outlineWidth may be in any of the forms acceptable to Tk_GetPixels.
Defaults to 1.

-visibleboolean
Specifies a boolean value which determines whether the marquee is displayed.

pathNamemarqueecoords ?x1y1x2y2?
Returns a list containing the x and y coordinates of the anchor followed by the x and y
coordinates of the corner, if no additional arguments are specified. If four coordinates
are specified, sets the anchor to the given coordinates x1 and y1 and the corner to the
coordinates x2 and y2.

pathNamemarqueecorner ?xy?
Returns a list containing the x and y coordinates of the corner, if no additional arguments
are specified. If two coordinates are specified, sets the corner to the given coordinates
x and y.

pathNamemarqueeidentify
Returns a list with information about any items intersecting the marquee. The format of
the returned list is:

{
{item {column element element ...} {column element element ...} ...}
{item {column element element ...} {column element element ...} ...}
...
}

There may be zero sublists following an item id if the marquee is in the button/line area
of an item. There may be zero element names following a column id if the item-column has no
style or if the marquee does not intersect any elements in that column.

pathNamenotifyoption ?arg...?
Many Tk widgets communicate with the outside world via -command callbacks and/or virtual events.
For example, the Text widget evaluates its -yscrollcommand when the view in the widget changes,
and generates a <<Modified>> virtual event when text is inserted or deleted. A treectrl widget
replaces both methods of communication with its own event mechanism accessed through the notify
subcommands.

The exact behavior of the command depends on the option argument that follows the notify argument.
The following forms of the command are supported:

pathNamenotifybind ?object? ?pattern? ?+??script?
This command associates Tcl scripts with events generated by a treectrl widget. If all
three arguments are specified, notifybind will arrange for script (a Tcl script) to be
evaluated whenever the event(s) specified by pattern are generated by this treectrl widget.
If script is prefixed with a "+", then it is appended to any existing binding for pattern;
otherwise script replaces any existing binding. If script is an empty string then the
current binding for pattern is destroyed, leaving pattern unbound. In all of the cases
where a script argument is provided, notifybind returns an empty string.

If pattern is specified without a script, then the script currently bound to pattern is
returned, or an empty string is returned if there is no binding for pattern. If neither
pattern nor script is specified, then the return value is a list whose elements are all the
patterns for which there exist bindings for object.

The object argument determines which window(s) the binding applies to. If object begins
with a dot, as in .a.b.c, then it must be the path name for a window; otherwise it may be
an arbitrary string. Like the regular bind command, bindings on window names are
automatically removed if that window is destroyed.

pathNamenotifyconfigureobjectpattern ?option? ?value? ?optionvalue...?
This command sets and retrieves options for bindings created by the notifybind command.

If no option is specified, the command returns a list with option-value pairs describing
all the available binding options for pattern on object. If option is specified with no
value, then the command returns the current value of that option. If one or more option-
value pairs are specified, then the command modifies the given option(s) to have the given
value(s) for the binding; in this case the command returns an empty string.

The following binding options are supported:

-activeboolean
Specifies if the binding should be active. As long as this option is specified as
false, a binding script will not be evaluated when the corresponding event is
generated.

pathNamenotifydetailnameseventName
Returns a list containing the names of all details, which are installed for the event with
the name eventName by means of the notifyinstall widget command or by the treectrl widget
itself.

pathNamenotifyeventnames
Returns a list containing the names of all events, which are installed by means of the
notifyinstall widget command or by the treectrl widget itself.

pathNamenotifygeneratepattern ?charMap? ?percentsCommand?
This command causes the treectrl widget to generate an event. This command is typically
used to generate dynamic events created by the notifyinstall command, but may be used to
generate static events also. The event specified by pattern is generated, and any active
binding scripts on the event are evaluated after undergoing %-substitution. If there are
details defined for the event, pattern must describe an <eventName-detail> pair, otherwise
pattern should be <eventName>.

The optional charMap is a list of char-value pairs as in the form returned by arrayget.
Each char has to be exactly one character. The charMap is used in %-substitution.

If percentsCommand is specified, then it will be used to perform %-substitution on any
scripts bound to the event. If percentsCommand is not specified and the event is dynamic,
then the %-subtitution command passed to notifyinstall will be used if it was provided. If
the event is static or no %-substitution command is available, then all %-substitution is
done using charMap only . See notifyinstall for a description of percentsCommand.

pathNamenotifyinstallpattern ?percentsCommand?
This command installs a new event or detail specified by pattern. Events created by this
command are called dynamic, whereas events created by the treectrl widget itself are called
static. This command may be called to set or retrieve the percentsCommand for an existing
dynamic event.

The optional percentsCommand is a list containing the name of a Tcl command, plus any
optional arguments, to which five additional arguments will be appended. The command will
be called to perform %-substitution on any scripts bound to the event specified by pattern
(see EVENTSANDSCRIPTSUBSTITUTIONS). PercentsCommand should be defined as follows:

proc percentsCommand {?arg arg ...? char object event detail charMap} {
switch -- $char {
...
}
return $value
}

The optional arg arguments are part of the percentsCommand list. Char is the %-character
to be substituted. Object is the same as the argument to notifybind. Event and detail
specify the event. CharMap is the same as the argument to notifygenerate. PercentsCommand
should return the value to replace the %-character by. If an error occurs evaluating
percentsCommand, the %-character is replaced by itself.

notifyinstall returns the current percentsCommand for the event, or an error if the event
is not dynamic.

pathNamenotifyinstalldetaileventNamedetail ?percentsCommand?
Deprecated. Use notifyinstall with a pattern of <eventName-detail> instead.

pathNamenotifyinstalleventeventName ?percentsCommand?
Deprecated. Use notifyinstall with a pattern of <eventName> instead.

pathNamenotifylinkagepattern
Returns a string indicating whether the specified event or detail is created by means of
the notifyinstall widget command (dynamic) or by the treectrl widget itself (static).

pathNamenotifylinkageeventName ?detail?
Deprecated. Use notifylinkage with a pattern of <eventName> or <eventName-detail>
instead.

pathNamenotifyunbindobject ?pattern?
If no pattern is specified, all bindings on object are removed. If pattern is specified,
then the current binding for pattern is destroyed, leaving pattern unbound.

pathNamenotifyuninstallpattern
If the event or detail specified by pattern is static (i.e. created by the treectrl widget
itself), an error is generated. Otherwise the dynamic event or detail is removed. If an
event name is specified without a detail, all details for that event are also removed.

pathNamenotifyuninstalldetaileventNamedetail
Deprecated. Use notifyuninstall with a pattern of <eventName-detail> instead.

pathNamenotifyuninstalleventeventName
Deprecated. Use notifyuninstall with a pattern of <eventName> instead.

pathNamenumcolumns
Deprecated. Use the columncount command instead.

pathNamenumitems
Deprecated. Use the itemcount command instead.

pathNameorphans
Returns a list containing the item ids of all items which have no parent. When an item is
created, it has no parent by default, and can later become an orphan by means of the itemremove
widget command. The root item is not returned.

pathNamerangefirstlast
Deprecated. Use the itemrange command instead.

pathNamescanoptionargs
This command is used to implement scanning on treectrls. It has two forms, depending on option:

pathNamescanmarkxy
Records x and y and the treectrl's current view; used in conjunction with later scandragto commands. Typically this command is associated with a mouse button press in the
widget and x and y are the coordinates of the mouse. It returns an empty string.

pathNamescandragtoxy ?gain?
This command computes the difference between its x and y arguments (which are typically
mouse coordinates) and the x and y arguments to the last scanmark command for the widget.
It then adjusts the view by gain times the difference in coordinates, where gain defaults
to 10. This command is typically associated with mouse motion events in the widget, to
produce the effect of dragging the treectrl at high speed through its window. The return
value is an empty string.

pathNameseeitemDesc ?columnDesc? ?optionvalue...?
Adjust the view in the treectrl so that the item described by itemDesc is visible. If the item is
already visible then the command has no effect; otherwise the treectrl scrolls to bring the item
into view, and the corresponding <Scroll-x> and/or <Scroll-y> events are generated. If columnDesc
is specified then a specific column of the item is scrolled into view instead of the entire item.

The following options are supported:

-centerflagsFlags is a string that contains zero or more of the characters x or y. This option is used
to center the item horizontally and/or vertically in the window. The item will be centered
regardless of whether it is already visible.

pathNameselectionoptionargs
This command is used to adjust the selection within a treectrl. It has several forms, depending
on option:

pathNameselectionaddfirst ?last?
First and last (if specified) must be valid itemdescriptions. If both first and last are
specified, then they may refer to a single item only; in this case the command adds every
unselected item in the range between first and last, inclusive, to the selection without
affecting the selected state of items outside that range. If only first is specified, then
every unselected item specified by first is added to the selection. A <Selection> event is
generated if any items were added to the selection.

pathNameselectionanchor ?itemDesc?
If itemDesc is specified, the selection anchor is set to the described item. The selection
anchor is the end of the selection that is fixed while dragging out a selection with the
mouse. The item description anchor may be used to refer to the anchor item. This command
doesn't modify the selection state of any item. Returns the unique id of the selection
anchor item.

pathNameselectionclear ?first? ?last?
First and last (if specified) must be valid itemdescriptions. If both first and last are
specified, then they may refer to a single item only; in this case any selected items
between first and last (inclusive) are removed from the selection without affecting the
selected state of items outside that range. If only first is specified, then every
selected item specified by first is removed from the selection. If neither first nor last
are specified, then all selected items are removed from the selection. A <Selection> event
is generated if any items were removed from the selection.

pathNameselectioncount
Returns an integer indicating the number of items in the treectrl that are currently
selected.

pathNameselectionget ?first? ?last?
When no additional arguments are given, the result is an unsorted list containing the item
ids of all of the items in the treectrl that are currently selected. If there are no items
selected in the treectrl, then an empty string is returned. The optional arguments first
and last are treated as indices into the sorted list of selected items; these arguments
allow in-place lindex and lrange operations on the selection. For example:

.t selection get 0 ; # return the first selected item
.t selection get end ; # return the last selected item
.t selection get 1 end-1 ; # return every selected item except the first and last

pathNameselectionincludesitemDesc
Returns 1 if the item described by itemDesc is currently selected, 0 if it isn't.

pathNameselectionmodifyselectdeselect
Both arguments select and deselect are a possibly-empty list of itemdescriptions. Any
unselected items in select are added to the selection, and any selected items in deselect
are removed from the selection (except for those items which are also in select). A
<Selection> event is generated if any items were selected or deselected.

pathNamestateoptionargs
This command is used to manipulate the list of user-defined item states, see section STATES below.
Item states can also be managed using the itemstate command. To manage states for header-rows,
use the headerstate widget command. The exact behavior of the command depends on the option
argument that follows the state argument. The following forms of the command are supported:

pathNamestatedefinestateName
Defines a new state with the name stateName, which must not be the name of an existing
state.

pathNamestatelinkagestateName
Returns a string indicating whether the specified state is user-defined by means of the
statedefine widget command (dynamic) or predefined by the treectrl widget itself (static).

pathNamestatenames
Returns a list containing the names of all user-defined states.

pathNamestateundefine ?stateName...?
Every stateName must be the name of a user-defined state. Removes this state from the list
of user-defined states.

pathNamestyleoption ?element? ?argarg...?
This command is used to manipulate styles, which can be thought of as a geometry manager for
elements. The exact behavior of the command depends on the option argument that follows the style
argument. The following forms of the command are supported:

pathNamestylecgetstyleoption
This command returns the current value of the option named option associated with the style
given by style. Option may have any of the values accepted by the styleconfigure widget
command.

This command also accepts the -statedomain option.

pathNamestyleconfigurestyle ?option? ?value? ?optionvalue...?
This command is similar to the configure widget command except that it modifies options
associated with the style given by style instead of modifying options for the overall
treectrl widget. If no option is specified, the command returns a list describing all of
the available options for style (see Tk_ConfigureInfo for information on the format of this
list). If option is specified with no value, then the command returns a list describing
the one named option (this list will be identical to the corresponding sublist of the value
returned if no option is specified). If one or more option-value pairs are specified, then
the command modifies the given option(s) to have the given value(s) in style; in this case
the command returns an empty string.

The following options are supported:

-buttonyoffset
Specifies the distance from the top of the item that the expand/collapse button
should be drawn. If offset is an empty string (the default) then the button is
centered vertically in the item. The value may have any of the forms acceptable to
Tk_GetPixels. This option only has effect when the style is set in an item in the
tree column.

-orientvarName
This option specifies which orientation should be used when laying out the elements
associated with this style. Must be either horizontal (the default) or vertical or
an abbreviation of one of these.

pathNamestylecreatename ?optionvalue...?
Creates a new style with the unique user-defined name name. After name there may be any
number of option-value pairs, each of which sets one of the configuration options for the
style. See the styleconfigure command for the possible options. The result of this
command is the name of the new style (the same as the name option).

This command also accepts the -statedomain option with a value of either header or item to
specify where this style will be displayed.

pathNamestyledelete ?style...?
Deletes each of the named styles and returns an empty string. If a style is deleted while
it is still used to display one or more items, it is also removed from the style list of
these items.

pathNamestyleelementsstyle ?elementList?
Specifies the elements which should be layed out by this style. Each element of
elementList must be the name of an element created by the widget command elementcreate.
Duplicate names in elementList are ignored. An element which was specified in a former
call of this command for style but is not included in elementList, will be deleted from the
elements layed out by style.

Every element used by a style must have been created with the same value for the
-statedomain option.

If the elementList argument is not specified, a list is returned containing the currently
defined elements of style.

pathNamestylelayoutstyleelement ?option? ?value? ?optionvalue...?
This command is similar to the configure widget command except that it modifies options
used by style for laying out element instead of modifying options for the overall treectrl
widget. If no option is specified, the command returns a list with option-value pairs
describing all of the available options for the layout. If option is specified with no
value, then the command returns the value of the named option. If one or more option-value
pairs are specified, then the command modifies the given option(s) to have the given
value(s) for the layout; in this case the command returns an empty string.

The options of a layout have effect on exactly the one element element managed by style.
The following options are supported:

-detachboolean
Specifies whether the element should be positioned by itself, i.e. independent from
the other elements. The default is false.

-centerflagsFlags is a string that contains zero or more of the characters x or y. x causes the
element to be centered horizontally, y causes the element to be centered vertically.
When more than one element has -center layout, all the elements between the first
and last with -center layout in the style's list of elements are centered as a
group. Consider the following when there is another element to the right of
MyElement:

.t style layout MyStyle MyElement -expand we
.t style layout MyStyle MyElement -center x

With the first call, MyElement will be centered only within the space that is not
occupied by the other element, so MyElement will appear off-center towards the left
of the style. With the second call, MyElement will be centered within the style so
long as it doesn't overlap the other element.

-drawboolean
This is a per-state option that determines whether an element should be drawn. If
the value of the option evaluates to false for a given item state, then the element
is not drawn, although it still consumes space in the layout.

-expandflags
This option allows the external padding around the element to increase when a style
has more screen space than it needs. Flags is a string that contains zero or more
of the characters n, s, w or e. Each letter refers to the padding on the top,
bottom, left, or right that should be allowed to increase. This option is typically
used to justify an element. The default is an empty string.

-iexpandflags
This option allows the internal padding of the element and the display area of the
element to increase when a style has more screen space than it needs. Flags is a
string that contains zero or more of the characters x, y, n, s, w or e. For n, s, w
and e, each letter refers to the padding on the top, bottom, left, or right that
should be allowed to increase. For x and y, each letter refers to the horizontal
and vertical screen space the element can display itself in (i.e., the space between
the padding). Note that if the -union option is specified for this element, then the
x and y flags have no effect, since the size of an element with -union layout is
determined by the elements it surrounds. The default is an empty string.

-indentboolean
For item styles, this option specifies whether the element should be positioned to
the right of the button/line area in the tree column. When false, the element is
displayed beneath the buttons and lines in the tree column. This option is ignored
unless the -detach option is true.

For header styles, this option specifies whether the element should be positioned to
the right of the -canvaspadx padding. This option is ignored unless the -detach
option is true or the -union option is specified.

The default is true.

-ipadxamount-ipadyamountAmount specifies how much internal padding to leave on the left and right (for
-ipadx) or top and bottom (for -ipady) sides of the element. Amount may be a list of
two values to specify padding for the two sides separately. The default value is 0.
This option is typically used with the -union layout option, to create space around
the enclosed elements.

-minheightpixels-heightpixels-maxheightpixels
Specifies the minimum, fixed, and maximum height of the display area of the element.
The default is unspecified.

-minwidthpixels-widthpixels-maxwidthpixels
Specifies the minimum, fixed, and maximum width of the display area of the element.
The default is unspecified.

-padxamount-padyamountAmount specifies how much external padding to leave on the left and right (for
-padx) or top and bottom (for -pady) sides of the element. Amount may be a list of
two values to specify padding for the two sides separately. The default value is 0.

-squeezeflags
This option allows the display area of an element to decrease when a style has less
space than it needs. Flags is a string that contains zero or more of the characters
x or y. x allows display area to decrease horizontally, y allows display area to
decrease vertically. This option is typically used for text elements and will cause
the text element to display an ellipsis (...) and/or wrap lines. The default is an
empty string.

-stickyflags
This option controls how the actual display information (image, text, etc) of an
element is positioned (or stretched) within its display area. Flags is a string
that contains zero or more of the characters n, s, w or e. Each letter refers to the
top, bottom, left or right side of the display area that the display information
should "stick" to. The default is nswe.

-unionelementList
Specifies a list of other elements which this element will surround. The size of an
element with -union layout is determined by the size and position of the elements in
elementList. The -ipadx and -ipady options in this case refer to the distance of
the edges of the display area of this element from those elements it surrounds. This
option is typically used to display a selection rectangle around a piece of text. If
none of the elements in elementList are visible, then the element is not displayed.

-visibleboolean
This is a per-state option that controls visibility of an element. If the value of
the option evaluates to false for a given item state, then the element is not
displayed and consumes no space in the layout.

pathNamestylenames
Returns a list containing the names of all existing styles.

pathNamethemeoption ?arg...?
This command is used to interact with the platform-specific theme. The exact behavior of the
command depends on the option argument that follows the theme argument. The following forms of
the command are supported:

pathNamethemeplatform
Returns the API used to draw themed parts of the treectrl. On Mac OS X the result is
always aqua. On MS Windows the result is visualstyles if the uxtheme.dll was loaded and
visual themes are in use, otherwise X11 is returned to indicate the Tk Xlib calls are
drawing the themed parts. On Unix systems the result is gtk if the Gtk+ version of
treectrl was built, otherwise X11 is returned.

pathNamethemesetwindowthemeappname
The command is available on MS Windows only. If appname is "Explorer" then the item
buttons look like those in the Explorer file browser (disclosure triangles under Windows
Vista/7). If appname is an empty string then the buttons revert to their default
appearance according to the system's current visual style.

pathNametoggle ?-recurse? ?itemDesc...?
Use itemtoggle instead.

pathNamexview ?args?
This command is used to query and change the horizontal position of the information displayed in
the treectrl's window. It can take any of the following forms:

pathNamexview
Returns a list containing two elements. Each element is a real fraction between 0 and 1;
together they describe the horizontal span that is visible in the window. For example, if
the first element is .2 and the second element is .6, 20% of the tree's area is off-screen
to the left, the middle 40% is visible in the window, and 40% of the tree is off-screen to
the right. These are the same values passed to scrollbars via the -xscrollcommand option.

pathNamexviewmovetofraction
Adjusts the view in the window so that fraction of the total width of the tree is off-
screen to the left. Fraction must be a fraction between 0 and 1. A <Scroll-x> event is
generated.

pathNamexviewscrollnumberwhat
This command shifts the view in the window left or right according to number and what.
Number must be an integer. What must be either units or pages or an abbreviation of one of
these. If what is units, the view adjusts left or right in units determined by the
-xscrollincrement option (which may be zero, see the description of that option). If what
is pages then the view adjusts in units of nine-tenths the window's width. If number is
negative then information farther to the left becomes visible; if it is positive then
information farther to the right becomes visible. A <Scroll-x> event is generated.

pathNameyview ?args?
This command is used to query and change the vertical position of the information displayed in the
treectrl's window. It can take any of the following forms:

pathNameyview
Returns a list containing two elements. Each element is a real fraction between 0 and 1;
together they describe the vertical span that is visible in the window. For example, if
the first element is .6 and the second element is 1.0, the lowest 40% of the tree's area is
visible in the window. These are the same values passed to scrollbars via the
-yscrollcommand option.

pathNameyviewmovetofraction
Adjusts the view in the window so that fraction of the tree's area is off-screen to the
top. Fraction is a fraction between 0 and 1. A <Scroll-y> event is generated.

pathNameyviewscrollnumberwhat
This command adjusts the view in the window up or down according to number and what.
Number must be an integer. What must be either units or pages. If what is units, the view
adjusts up or down in units of the -yscrollincrement option (which may be zero, see the
description of that option). If what is pages then the view adjusts in units of nine-
tenths the window's height. If number is negative then higher information becomes visible;
if it is positive then lower information becomes visible. A <Scroll-y> event is generated.

Widget Specific Options

Command-Line Switch: -backgroundimage
Database Name: backgroundImage
Database Class: BackgroundImage

Specifies the name of an image to draw as the list background. Other options control whether the
image is tiled and whether the image scrolls. If the image is transparent it is drawn on top of
any column -itembackground colors.

Command-Line Switch: -backgroundmode
Database Name: backgroundMode
Database Class: BackgroundMode

Specifies how the background color of items is chosen in each column. The value should be one of
row, column, order, or ordervisible. The default is row. This option has only an effect for
columns which have -itembackground defined as list of two or more colors (see section COLUMNS
below for more on this). If row or column is specified, the background color is chosen based on
the location of the item in the 1- or 2-dimensional grid of items as layed out on the screen; this
layout of items is affected by the -orient and -wrap options as well as item visibility. When
order or ordervisible is specified, the background color is chosen based on the result of the itemorder command, regardless of the layout of items.

Command-Line Switch: -bgimage
Database Name: bgImage
Database Class: BgImage

Synonym for -backgroundimage.

Command-Line Switch: -bgimageanchor
Database Name: bgImageAnchor
Database Class: BgImageAnchor

Specifies how the background image should be aligned in any of the forms acceptable to
Tk_GetAnchor. Must be one of the values n, ne, e, se, s, sw, w, nw, or center. The default is
nw. When the background image scrolls, the anchor position is relative to the canvas, otherwise
it is relative to the contentbox.

Command-Line Switch: -bgimageopaque
Database Name: bgImageOpaque
Database Class: BgImageOpaque

Specifies a boolean indicating whether or not the background image is fully opaque. This is
needed because there is no way in Tk to determine whether an image contains transparency or not.
The default value is true, so if you use a transparent -backgroundimage you must set this to
false.

Command-Line Switch: -bgimagescroll
Database Name: bgImageScroll
Database Class: BgImageScroll

Specifies whether the background image scrolls along with the items or whether it remains locked
in place relative to the edges of the window. The value must be a string that contains zero or
more of the characters x or y. The default is xy.

Command-Line Switch: -bgimagetile
Database Name: bgImageTile
Database Class: BgImageTile

Specifies whether the background image is tiled along the x and/or y axes. The value must be a
string that contains zero or more of the characters x or y. The default is xy.

Command-Line Switch: -buttonbitmap
Database Name: buttonBitmap
Database Class: ButtonBitmap

Specifies the name of a bitmap be used to display the expand/collapse button of an item. This is
a per-state option. If a bitmap is specified for a certain item state, it overrides the effects
of -usetheme.

Command-Line Switch: -buttoncolor
Database Name: buttonColor
Database Class: ButtonColor

Specifies the foreground color which should be used for drawing the outline and the plus or minus
sign of an item's expand/collapse button.

Command-Line Switch: -buttonimage
Database Name: buttonImage
Database Class: ButtonImage

Specifies the name of an image to be used to display the expand/collapse button of an item. This
is a per-state option. If an image is specified for a certain item state, it overrides the
effects of -buttonbitmap and -usetheme.

Command-Line Switch: -buttonsize
Database Name: buttonSize
Database Class: ButtonSize

Specifies the width and height of the expand/collapse button of an item in any of the forms
acceptable to Tk_GetPixels.

Command-Line Switch: -buttonthickness
Database Name: buttonThickness
Database Class: ButtonThickness

Specifies the width of the outline and the plus or minus sign of the expand/collapse button of an
item in any of the forms acceptable to Tk_GetPixels.

Command-Line Switch: -buttonttracking
Database Name: buttonTracking
Database Class: ButtonTracking

Specifies a boolean that determines if the expand/collapse buttons are tracked like pushbuttons
when clicking them. When true, buttons are not toggled until the <ButtonRelease> event occurs
over them. When false, buttons are toggled as soon as the <ButtonPress> event occurs over them.
This option defaults to true on Mac OS X and Gtk+, false on Win32 and X11.

Command-Line Switch: -canvaspadx
Database Name: canvasPadX
Database Class: CanvasPadX

Specifies the width of extra whitespace on the left and right edges of the canvas in any of the
forms acceptable to Tk_GetPixels. The option value may be a list of one or two screen distances
to specify padding for the two edges separately. The default is 0.

Command-Line Switch: -canvaspady
Database Name: canvasPadY
Database Class: CanvasPadY

Specifies the height of extra whitespace on the top and bottom edges of the canvas in any of the
forms acceptable to Tk_GetPixels. The option value may be a list of one or two screen distances
to specify padding for the two edges separately. The default is 0.

Command-Line Switch: -columnprefix
Database Name: columnPrefix
Database Class: ColumnPrefix

Specifies an ascii string that changes the way column ids are reported and processed. If this
option is a non-empty string, the usual integer value of a column id is prefixed with the given
string. This can aid debugging but it is important your code doesn't assume column ids are
integers if you use it.

Command-Line Switch: -columnproxy
Database Name: columnProxy
Database Class: ColumnProxy

If this option specifies a non empty value, it should be a screen distance in any of the forms
acceptable to Tk_GetPixels. Then a 1 pixel thick vertical line will be drawn at the specified
screen distance from the left edge of the treectrl widget, which reaches from top to bottom of the
treectrl widget and uses an inverting color (i.e black on lighter background, white on darker
background). This line can be used to give the user a visual feedback during column resizing.

Command-Line Switch: -columnresizemode
Database Name: columnResizeMode
Database Class: ColumnResizeMode

Specifies the visual feedback used when resizing columns. The value should be one of proxy or
realtime. For proxy, a 1-pixel thick vertical line is drawn representing where the right edge of
the column will be after resizing. For realtime, the column's size is changed while the user is
dragging the right edge of the column. The default is realtime.

Command-Line Switch: -columntagexpr
Database Name: columnTagExpr
Database Class: ColumnTagExpr

Specifies a boolean that enables or disables tag expressions in column descriptions. See ITEMANDCOLUMNTAGS.

Command-Line Switch: -defaultstyle
Database Name: defaultStyle
Database Class: DefaultStyle

This option is deprecated; use the column option -itemstyle instead. Specifies a list of styles,
one per column, to apply to each item created by the itemcreate command. The number of styles in
the list can be different from the number of tree columns. Each list element should be a valid
style name or an empty string to indicate no style should be applied to a specific column. The
list of styles is updated if a style is deleted or if a column is moved.

Command-Line Switch: -doublebuffer
Database Name: doubleBuffer
Database Class: DoubleBuffer

This option no longer has any effect, but was left in for compatibility. It used to control the
amount of double-buffering that was used when displaying a treectrl.

Command-Line Switch: -headerfont
Database Name: headerFont
Database Class: Font

Specifies the font to draw text in column headers with. The default value is TkHeadingFont where
available (on Tk 8.5+). This option can be overridden by setting the -font option for individual
column headers.

Command-Line Switch: -headerfg
Database Name: headerForeground
Database Class: Foreground

Synonym for -headerforeground.

Command-Line Switch: -headerforeground
Database Name: headerForeground
Database Class: Foreground

Specifies the color to draw text in column headers with. The default value is the Tk button
foreground color (usually black). On Gtk+, the system theme may override this color. This option
(and the Gtk+ system theme color) can be overridden by setting the -textcolor option for
individual column headers.

Command-Line Switch: -height
Database Name: height
Database Class: Height

Specifies the desired height for the window in any of the forms acceptable to Tk_GetPixels. The
default is 200 pixels. If this option is less than or equal to zero then the window will not
request any size at all.

Command-Line Switch: -indent
Database Name: indent
Database Class: Indent

Specifies the screen distance an item is indented relative to its parent item in any of the forms
acceptable to Tk_GetPixels. The default is 19 pixels.

Command-Line Switch: -itemgapx
Database Name: itemGapX
Database Class: ItemGapX

Specifies the horizontal spacing between adjacent items in any of the forms acceptable to
Tk_GetPixels. The default is 0.

Command-Line Switch: -itemgapy
Database Name: itemGapY
Database Class: ItemGapY

Specifies the vertical spacing between adjacent items in any of the forms acceptable to
Tk_GetPixels. The default is 0.

Command-Line Switch: -itemheight
Database Name: itemHeight
Database Class: ItemHeight

Specifies a fixed height for every item in any of the forms acceptable to Tk_GetPixels. If non-
zero, this option overrides the requested height of an item and the -minitemheight option. If an
item's own -height option is specified then that is the height used for the item. In any case,
items are never shorter than the maximum height of a button if they display one. The default is
0.

Command-Line Switch: -itemprefix
Database Name: itemPrefix
Database Class: ItemPrefix

Specifies an ascii string that changes the way item ids are reported and processed. If this option
is a non-empty string, the usual integer value of an item id is prefixed with the given string.
This can aid debugging but it is important your code doesn't assume item ids are integers if you
use it.

Command-Line Switch: -itemtagexpr
Database Name: itemTagExpr
Database Class: ItemTagExpr

Specifies a boolean that enables or disables tag expressions in item descriptions. See ITEMANDCOLUMNTAGS.

Command-Line Switch: -itemwidth
Database Name: itemWidth
Database Class: ItemWidth

Specifies a fixed width for every item in any of the forms acceptable to Tk_GetPixels. If more
than one column is visible, then this option has no effect. If the -orient option is vertical,
and the -wrap option is unspecified, then this option has no effect (in that case all items are as
wide as the column).

Command-Line Switch: -itemwidthequal
Database Name: itemWidthEqual
Database Class: ItemWidthEqual

Specifies a boolean that says whether all items should have the same width. If more than one
column is visible, then this option has no effect. If the -orient option is vertical, and the
-wrap option is unspecified, then this option has no effect (in that case all items are as wide as
the column). If the -itemwidth option is specified, then this option has no effect.

Command-Line Switch: -itemwidthmultiple
Database Name: itemWidthMultiple
Database Class: ItemWidthMultiple

Specifies a screen distance that every item's width will be evenly divisible by in any of the
forms acceptable to Tk_GetPixels. If more than one column is visible, then this option has no
effect. If the -orient option is vertical, and the -wrap option is unspecified, then this option
has no effect (in that case all items are as wide as the column). If the -itemwidth option is
specified, then this option has no effect.

Command-Line Switch: -linecolor
Database Name: lineColor
Database Class: LineColor

Specifies the color which should be used for drawing the connecting lines between related items.

Command-Line Switch: -linestyle
Database Name: lineStyle
Database Class: LineStyle

Specifies the appearance of the connecting lines between related items. The value should be dot,
which is the default, or solid.

Command-Line Switch: -linethickness
Database Name: lineThickness
Database Class: LineThickness

Specifies the thickness of the connecting lines between related items in any of the forms
acceptable to Tk_GetPixels.

Command-Line Switch: -minitemheight
Database Name: minItemHeight
Database Class: MinItemHeight

Specifies a minimum height for every item in any of the forms acceptable to Tk_GetPixels. The
default is 0, which means that every item has the height requested by the arrangement of elements
in each column. This option has no effect if either the -itemheight widget option or -height item
option is specified. In any case, items are never shorter than the maximum height of an
expand/collapse button.

Command-Line Switch: -rowproxy
Database Name: rowProxy
Database Class: RowProxy

If this option specifies a non empty value, it should be a screen distance in any of the forms
acceptable to Tk_GetPixels. Then a 1 pixel thick horizontal line will be drawn at the specified
screen distance from the top edge of the treectrl widget, which reaches from left to right of the
treectrl widget and uses an inverting color (i.e black on lighter background, white on darker
background). This line can be used to give the user a visual feedback during row resizing.

Command-Line Switch: -scrollmargin
Database Name: scrollMargin
Database Class: ScrollMargin

Specifies a positive screen distance in any of the forms acceptable to Tk_GetPixels. This option
is used by the default bindings to determine how close to the edges of the contentbox the mouse
pointer must be before scrolling occurs. Specifying a positive value is useful when items may be
drag-and-dropped. Defaults to 0.

Command-Line Switch: -selectmode
Database Name: selectMode
Database Class: SelectMode

Specifies one of several styles for manipulating the selection. The value of the option may be
arbitrary, but the default bindings expect it to be either single, browse, multiple, or extended;
the default value is browse.

Command-Line Switch: -showbuttons
Database Name: showButtons
Database Class: ShowButtons

Specifies a boolean value that determines whether this widget leaves indentation space to display
the expand/collapse buttons next to items. The default value is true. The item option -button
determines whether an item has a button. See also the widget options -showrootbutton and
-showrootchildbuttons.

Command-Line Switch: -showheader
Database Name: showHeader
Database Class: ShowHeader

Specifies a boolean value that determines whether this widget should display the header line with
the column names at the top of the widget. The default value is true.

Command-Line Switch: -showlines
Database Name: showLines
Database Class: ShowLines

Specifies a boolean value that determines whether this widget should draw the connecting lines
between related items. The default value is true on Win32 and X11, false on Mac OS X and Gtk+.

Command-Line Switch: -showroot
Database Name: showRoot
Database Class: ShowRoot

Specifies a boolean value that determines whether this widget should draw the root item. By
suppressing the drawing of the root item the widget can have multiple items that appear as
toplevel items. The default value is true.

Command-Line Switch: -showrootbutton
Database Name: showRootButton
Database Class: ShowRootButton

Specifies a boolean value that determines whether this widget leaves indentation space to display
the expand/collapse button next to the root item. The default value is false. The item option
-button determines whether the root item has a button.

Command-Line Switch: -showrootchildbuttons
Database Name: showRootChildButtons
Database Class: ShowRootChildButtons

Specifies a boolean value that determines whether this widget should draw the expand/collapse
buttons next to children of the root item. The default value is true.

Command-Line Switch: -showrootlines
Database Name: showRootLines
Database Class: ShowRootLines

Specifies a boolean value that determines whether this widget should draw the connecting lines
between children of the root item. The default value is true.

Command-Line Switch: -treecolumn
Database Name: treeColumn
Database Class: TreeColumn

Specifies a columndescription that determines which column displays the expand/collapse buttons
and connecting lines between items. The default is unspecified.

Command-Line Switch: -usetheme
Database Name: useTheme
Database Class: UseTheme

Specifies a boolean value that determines whether this widget should draw parts of itself using a
platform-specific theme manager. The default is true.

Command-Line Switch: -width
Database Name: width
Database Class: Width

Specifies the desired width for the window in any of the forms acceptable to Tk_GetPixels. The
default is 200 pixel. If this option is less than or equal to zero then the window will not
request any size at all.

Command-Line Switch: -wrap
Database Name: wrap
Database Class: Wrap

Specifies whether items are arranged in a 1- or 2-dimensional layout.

If the value is an empty string (the default), then items are arranged from top to bottom
(-orient=vertical) or from left to right (-orient=horizontal) in a 1-dimensional layout.

If the value is "Nitems", then no more than N items will appear in a vertical group
(-orient=vertical) or horizontal group (-orient=horizontal).

If the value is "Npixels", then no vertical group of items will be taller than N pixels
(-orient=vertical) or no horizontal group of items will be wider than N pixels
(-orient=horizontal).

If the value is window, then a no vertical group of items will be taller than the window
(-orient=vertical) or no horizontal group of items will be wider than the window
(-orient=horizontal).

It is also possible to cause wrapping to occur on a per-item basis by using the item option -wrap.
See the itemcreate command for that option.

Command-Line Switch: -xscrolldelay
Database Name: xScrollDelay
Database Class: ScrollDelay

This option controls how quickly horizontal scrolling occurs while dragging the mouse with button
1 pressed. The value should be a list of 1 or 2 integers interpreted as milliseconds. If 2
values are specified, then the first value determines the intial delay after the first scroll, and
the second value determines the delay for all scrolling after the first. If only 1 value is
specified, each scroll takes place after that delay.

Command-Line Switch: -xscrollincrement
Database Name: xScrollIncrement
Database Class: ScrollIncrement

Specifies an increment for horizontal scrolling, in any of the usual forms permitted for screen
distances. If the value of this option is greater than zero, the horizontal view in the window
will be constrained so that the canvas x coordinate at the left edge of the window is always an
even multiple of -xscrollincrement; furthermore, the units for scrolling (e.g., the change in
view when the left and right arrows of a scrollbar are selected) will also be -xscrollincrement.
If the value of this option is less than or equal to zero, then horizontal scrolling snaps to the
left of an item, or part of an item if items are wider than the contentbox.

Command-Line Switch: -xscrollsmoothing
Database Name: xScrollSmoothing
Database Class: ScrollSmoothing

Specifies whether scrolling should be done as if -xscrollincrement=1 whenever scrolling is
performed by non-unit amounts. When the value of this option is true and the xview command is
called to scroll by "units", scrolling occurs according to the -xscrollincrement option, and all
other scrolling is done as if the -xscrollincrement option was set to 1. The effect is that when
dragging the scrollbar thumb scrolling is very smooth, but when clicking the scrollbar buttons
scrolling is done in coarser increments. The default value is false.

Command-Line Switch: -yscrolldelay
Database Name: yScrollDelay
Database Class: ScrollDelay

This option controls how quickly vertical scrolling occurs while dragging the mouse with button 1
pressed. The value should be a list of 1 or 2 integers interpreted as milliseconds. If 2 values
are specified, then the first value determines the intial delay after the first scroll, and the
second value determines the delay for all scrolling after the first. If only 1 value is specified,
each scroll takes place after that delay.

Command-Line Switch: -yscrollincrement
Database Name: yScrollIncrement
Database Class: ScrollIncrement

Specifies an increment for vertical scrolling, in any of the usual forms permitted for screen
distances. If the value of this option is greater than zero, the vertical view in the window will
be constrained so that the canvas y coordinate at the top edge of the window is always an even
multiple of -yscrollincrement; furthermore, the units for scrolling (e.g., the change in view
when the top and bottom arrows of a scrollbar are selected) will also be -yscrollincrement. If
the value of this option is less than or equal to zero, then vertical scrolling snaps to the top
of an item, or part of an item if items are taller than the contentbox.

Command-Line Switch: -yscrollsmoothing
Database Name: yScrollSmoothing
Database Class: ScrollSmoothing

Specifies whether scrolling should be done as if -yscrollincrement=1 whenever scrolling is
performed by non-unit amounts. When the value of this option is true and the yview command is
called to scroll by "units", scrolling occurs according to the -yscrollincrement option, and all
other scrolling is done as if the -yscrollincrement option was set to 1. The effect is that when
dragging the scrollbar thumb scrolling is very smooth, but when clicking the scrollbar buttons
scrolling is done in coarser increments. The default value is false.

Window Element

An element of type window can be used to display a Tk window in an item. The following options are
supported for window elements:

-clipboolean
Specifies whether the associated Tk window is a borderless frame which should be used to clip its
child window so it doesn't overlap the header, borders, or other items or columns. When this
option is true, the treectrl manages the geometry of both the -window widget and its first child
widget; in this case the -window widget (which should be a borderless frame) is kept sized and
positioned so that it is never out-of-bounds.

-destroyboolean
Specifies whether the associated Tk window should be destroyed when the element is deleted. The
element is deleted when the item containing the element is deleted, when the column containing the
element is deleted, or when the style assigned to the item's column is changed. If this option is
unspecified (the default), it is treated as false and the Tk window will not be destroyed.

-windowpathName
Specifies the window to associate with this element. The window specified by pathName must either
be a child of the treectrl widget or a child of some ancestor of the treectrl widget. PathName may
not refer to a top-level window. This option cannot be specified by the elementcreate or elementconfigure commands, only by the itemelementconfigure command; i.e., the element must be
associated with a particular item.