Tk::place - Geometry manager for fixed or rubber-sheet placement

       The placer is a geometry manager for Tk.  It provides simple fixed placement of windows, where you
       specify the exact size and location of one window, called the slave, within another window, called the
       master.  The placer also provides rubber-sheet placement, where you specify the size and location of the
       slave in terms of the dimensions of the master, so that the slave changes size and location in response
       to changes in the size of the master.  Lastly, the placer allows you to mix these styles of placement so
       that, for example, the slave has a fixed width and height but is centered inside the master.

       $slave->place?(-option=>value?, -option=>value, ...?)?
           The  place  method arranges for the placer to manage the geometry of $slave.  The remaining arguments
           consist of one or more -option=>value pairs that specify  the  way  in  which  $slave's  geometry  is
           managed. -option may have any of the values accepted by the placeConfigure method.

           The place method returns $slave.

       $slave->placeConfigure?(-option=>value?, -option=>value, ...?)?
           Query  or modify the geometry options of the $slave. If no option is specified, this method returns a
           list describing the available 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 method  modifies  the  given
           option(s) to have the given value(s); in this case the command returns "undef".

           The following -option=>value pairs are supported:

           -anchor => whereWhere  specifies  which point of $slave is to be positioned at the (x,y) location selected by
                   the -x, -y, -relx, and -rely options.  The anchor point is in terms  of  the  outer  area  of
                   $slave  including  its  border,  if  any.  Thus if where is se then the lower-right corner of
                   $slave's border will appear at the given (x,y) location in the master.  The  anchor  position
                   defaults to nw.

           -bordermode => modeMode  determines  the  degree  to which borders within the master are used in determining the
                   placement of the slave.  The default and most common value  is  inside.   In  this  case  the
                   placer  considers  the  area of the master to be the innermost area of the master, inside any
                   border: an option of -x=>0 corresponds to an x-coordinate  just  inside  the  border  and  an
                   option of -relwidth=>1.0 means $slave will fill the area inside the master's border.  If mode
                   is  outside then the placer considers the area of the master to include its border; this mode
                   is typically used when placing $slave outside its master, as with the options  -x=>0,  -y=>0,
                   -anchor=>ne.   Lastly,  mode  may  be specified as ignore, in which case borders are ignored:
                   the area of the master is considered to be its official X area, which includes  any  internal
                   border but no external border.  A bordermode of ignore is probably not very useful.

           -height => sizeSize  specifies  the  height  for  $slave  in screen units (i.e. any of the forms accepted by
                   Tk_GetPixels).  The height will be the outer dimension of $slave  including  its  border,  if
                   any.   If  size  is an empty string, or if no -height or -relheight option is specified, then
                   the height requested internally by the window will be used.

           -in => $master$master is the reference to the window relative to which $slave is  to  be  placed.   $master
                   must  either be $slave's parent or a descendant of $slave's parent.  In addition, $master and
                   $slave must both be descendants  of  the  same  top-level  window.   These  restrictions  are
                   necessary  to  guarantee  that $slave is visible whenever $master is visible.  If this option
                   isn't specified then the master defaults to $slave's parent.

           -relheight => sizeSize specifies the height for $slave.  In this case the height is specified  as  a  floating-
                   point  number  relative to the height of the master: 0.5 means $slave will be half as high as
                   the master, 1.0 means $slave will have the same height as the master, and  so  on.   If  both
                   -height  and  -relheight  are  specified  for a slave, their values are summed.  For example,
                   -relheight=>1.0, -height=>-2 makes the slave 2 pixels shorter than the master.

           -relwidth => sizeSize specifies the width for $slave.  In this case the width is specified as a floating-point
                   number relative to the width of the master: 0.5 means $slave will be  half  as  wide  as  the
                   master,  1.0  means $slave will have the same width as the master, and so on.  If both -width
                   and  -relwidth  are  specified  for  a  slave,  their  values  are  summed.    For   example,
                   -relwidth=>1.0, -width=>5 makes the slave 5 pixels wider than the master.

           -relx => locationLocation  specifies  the x-coordinate within the master window of the anchor point for $slave
                   widget.  In this case the location is specified in a relative  fashion  as  a  floating-point
                   number:  0.0 corresponds to the left edge of the master and 1.0 corresponds to the right edge
                   of  the  master.   Location  need  not  be  in  the  range 0.0-1.0.  If both -x and -relx are
                   specified for a slave then  their  values  are  summed.   For  example,  "-relx=>0.5,  -x=-2"
                   positions the left edge of the slave 2 pixels to the left of the center of its master.

           -rely => locationLocation  specifies  the y-coordinate within the master window of the anchor point for $slave
                   widget.  In this case the value is specified  in  a  relative  fashion  as  a  floating-point
                   number:  0.0 corresponds to the top edge of the master and 1.0 corresponds to the bottom edge
                   of  the  master.   Location  need  not  be  in  the  range 0.0-1.0.  If both -y and -rely are
                   specified for a slave then their values are summed.  For example, -rely=>0.5, -x=>3 positions
                   the top edge of the slave 3 pixels below the center of its master.

           -width => sizeSize specifies the width for $slave in screen units  (i.e.  any  of  the  forms  accepted  by
                   Tk_GetPixels).  The width will be the outer width of $slave including its border, if any.  If
                   size  is  an  empty  string, or if no -width or -relwidth option is specified, then the width
                   requested internally by the window will be used.

           -x => locationLocation specifies the x-coordinate within the master window of the anchor point  for  $slave
                   widget.   The  location  is  specified  in  screen  units  (i.e. any of the forms accepted by
                   Tk_GetPixels) and need not lie within the bounds of the master window.

           -y => locationLocation specifies the y-coordinate within the master window of the anchor point  for  $slave
                   widget.   The  location  is  specified  in  screen  units  (i.e. any of the forms accepted by
                   Tk_GetPixels) and need not lie within the bounds of the master window.

           If the same value is specified separately with two different options, such as -x and -relx, then  the
           most recent option is used and the older one is ignored.

       $slave->placeForget
           The  placeForget  method causes the placer to stop managing the geometry of $slave.  As a side effect
           of this method call $slave will be unmapped so that it doesn't appear on the screen.  If $slave isn't
           currently managed by the placer then the method call has no effect.   placeForget  returns  an  empty
           string as result.

       $slave->placeInfo
           The placeInfo method returns a list giving the current configuration of $slave.  The list consists of
           -option=>value pairs in exactly the same form as might be specified to the place method.

       $slave->placeSlaves
           The  placeSlaves  method returns a list of all the slave windows for which $master is the master.  If
           there are no slaves for $master then an empty list is returned.

       If the configuration of a window has been retrieved with placeInfo, that configuration  can  be  restored
       later by first using placeForget to erase any existing information for the window and then invoking place
       with the saved information.

       It  is  not necessary for the master window to be the parent of the slave window.  This feature is useful
       in at least two situations.  First, for complex window layouts it means you can  create  a  hierarchy  of
       subwindows  whose  only  purpose  is to assist in the layout of the parent.  The ``realchildren'' of the
       parent (i.e. the windows that are significant for the application's user interface) can  be  children  of
       the  parent  yet  be placed inside the windows of the geometry-management hierarchy.  This means that the
       path names of the ``realchildren'' don't reflect the geometry-management hierarchy and users can specify
       options for the real children without being aware of the structure of the geometry-management hierarchy.

       A second reason for having a master different than the slave's parent is to tie  two  siblings  together.
       For  example, the placer can be used to force a window always to be positioned centered just below one of
       its siblings by specifying the configuration

           -in=>$sibling, -relx=>0.5, -rely=>1.0, -anchor=>'n', -bordermode=>'outside'

       Whenever the $sibling widget is repositioned in the future, the slave will be repositioned as well.

       Unlike many other geometry managers (such as the  packer)  the  placer  does  not  make  any  attempt  to
       manipulate  the geometry of the master windows or the parents of slave windows (i.e. it doesn't set their
       requested sizes).  To control the sizes of these windows, make them windows like frames and canvases that
       provide configuration options for this purpose.

       geometry manager, height, location, master, place, rubber sheet, slave, width

perl v5.40.1                                       2025-04-13                                         place(3pm)

       Tk::place - Geometry manager for fixed or rubber-sheet placement

       Tk::form, Tk::grid, Tk::pack

$widget->place?(-option=>value?, -option=>value, ...)?

          $widget->placeForget$widget->placeInfo$master->placeSlaves