intQwtWheel::borderWidth()constReturns:
Border width
Seealso:setBorderWidth()voidQwtWheel::drawTicks(QPainter*painter,constQRectF&rect)[protected],[virtual]
Draw the Wheel's ticks
Parameters:painter Painter
rect Geometry for the wheel
voidQwtWheel::drawWheelBackground(QPainter*painter,constQRectF&rect)[protected],[virtual]
Draw the Wheel's background gradient
Parameters:painter Painter
rect Geometry for the wheel
boolQwtWheel::isInverted()constReturns:
True, when the wheel is inverted
Seealso:setInverted()boolQwtWheel::isTracking()constReturns:
True, when tracking is enabled
Seealso:setTracking(), valueChanged(), wheelMoved()voidQwtWheel::keyPressEvent(QKeyEvent*event)[protected],[virtual]
Handle key events
• Qt::Key_Home
Step to minimum()
• Qt::Key_End
Step to maximum()
• Qt::Key_Up
In case of a horizontal or not inverted vertical wheel the value will be incremented by the step size.
For an inverted vertical wheel the value will be decremented by the step size.
• Qt::Key_Down
In case of a horizontal or not inverted vertical wheel the value will be decremented by the step size.
For an inverted vertical wheel the value will be incremented by the step size.
• Qt::Key_PageUp
The value will be incremented by pageStepSize() * singleStepSize().
• Qt::Key_PageDown
The value will be decremented by pageStepSize() * singleStepSize().
Parameters:event Key event
doubleQwtWheel::mass()constReturns:
mass
Seealso:setMass()doubleQwtWheel::maximum()constReturns:
The maximum of the range
Seealso:setRange(), setMaximum(), minimum()doubleQwtWheel::minimum()constReturns:
The minimum of the range
Seealso:setRange(), setMinimum(), maximum()QSizeQwtWheel::minimumSizeHint()const[protected],[virtual]Returns:
Minimum size hint
Warning:
The return value is based on the wheel width.
voidQwtWheel::mouseMoveEvent(QMouseEvent*event)[protected],[virtual]
Mouse Move Event handler. Turn the wheel according to the mouse position
Parameters:event Mouse event
voidQwtWheel::mousePressEvent(QMouseEvent*event)[protected],[virtual]
Mouse press event handler. Start movement of the wheel.
Parameters:event Mouse event
voidQwtWheel::mouseReleaseEvent(QMouseEvent*event)[protected],[virtual]
Mouse Release Event handler. When the wheel has no mass the movement of the wheel stops, otherwise it
starts flying.
Parameters:event Mouse event
Qt::OrientationQwtWheel::orientation()constReturns:
Orientation
Seealso:setOrientation()intQwtWheel::pageStepCount()constReturns:
Page step count
Seealso:setPageStepCount(), singleStep()voidQwtWheel::paintEvent(QPaintEvent*event)[protected],[virtual]
Qt Paint Event.
Parameters:event Paint event
voidQwtWheel::setBorderWidth(intwidth)
Set the border width. The border defaults to 2.
Parameters:width Border width
Seealso:borderWidth()voidQwtWheel::setInverted(boolon)
En/Disable inverted appearance. An inverted wheel increases its values in the opposite direction. The
direction of an inverted horizontal wheel will be from right to left an inverted vertical wheel will
increase from bottom to top.
Parameters:on En/Disable inverted appearance
Seealso:isInverted()voidQwtWheel::setMass(doublemass)[slot]
Set the slider's mass for flywheel effect. If the slider's mass is greater then 0, it will continue to
move after the mouse button has been released. Its speed decreases with time at a rate depending on the
slider's mass. A large mass means that it will continue to move for a long time.
Derived widgets may overload this function to make it public.
Parameters:mass New mass in kg
Seealso:mass()voidQwtWheel::setMaximum(doublevalue)
Set the maximum value of the range
Parameters:value Maximum value
Seealso:setRange(), setMinimum(), maximum()voidQwtWheel::setMinimum(doublevalue)
Set the minimum value of the range
Parameters:value Minimum value
Seealso:setRange(), setMaximum(), minimum()Note:
The maximum is adjusted if necessary to ensure that the range remains valid.
voidQwtWheel::setOrientation(Qt::Orientationorientation)
Set the wheel's orientation. The default orientation is Qt::Horizontal.
Parameters:orientation Qt::Horizontal or Qt::Vertical.
Seealso:orientation()voidQwtWheel::setPageStepCount(intcount)
Set the page step count. pageStepCount is a multiplicator for the single step size that typically
corresponds to the user pressing PageUp or PageDown.
A value of 0 disables page stepping.
The default value is 1.
Parameters:count Multiplicator for the single step size
Seealso:pageStepCount(), setSingleStep()voidQwtWheel::setRange(doublemin,doublemax)
Set the minimum and maximum values. The maximum is adjusted if necessary to ensure that the range remains
valid. The value might be modified to be inside of the range.
Parameters:min Minimum value
max Maximum value
Seealso:minimum(), maximum()voidQwtWheel::setSingleStep(doublestepSize)
Set the step size of the counter. A value <= 0.0 disables stepping
Parameters:stepSize Single step size
Seealso:singleStep(), setPageStepCount()voidQwtWheel::setStepAlignment(boolon)
En/Disable step alignment. When step alignment is enabled value changes initiated by user input ( mouse,
keyboard, wheel ) are aligned to the multiples of the single step.
Parameters:on On/Off
Seealso:stepAlignment(), setSingleStep()voidQwtWheel::setTickCount(intcount)
Adjust the number of grooves in the wheel's surface. The number of grooves is limited to 6 <= count <=
50. Values outside this range will be clipped. The default value is 10.
Parameters:count Number of grooves per 360 degrees
Seealso:tickCount()voidQwtWheel::setTotalAngle(doubleangle)[slot]
Set the total angle which the wheel can be turned. One full turn of the wheel corresponds to an angle of
360 degrees. A total angle of n*360 degrees means that the wheel has to be turned n times around its axis
to get from the minimum value to the maximum value.
The default setting of the total angle is 360 degrees.
Parameters:angle total angle in degrees
Seealso:totalAngle()voidQwtWheel::setTracking(boolenable)
En/Disable tracking. If tracking is enabled (the default), the wheel emits the valueChanged() signal
while the wheel is moving. If tracking is disabled, the wheel emits the valueChanged() signal only when
the wheel movement is terminated.
The wheelMoved() signal is emitted regardless id tracking is enabled or not.
Parameters:enable On/Off
Seealso:isTracking()voidQwtWheel::setUpdateInterval(intinterval)
Specify the update interval when the wheel is flying. Default and minimum value is 50 ms.
Parameters:interval Interval in milliseconds
Seealso:updateInterval(), setMass(), setTracking()voidQwtWheel::setValue(doublevalue)[slot]
Set a new value without adjusting to the step raster.
Parameters:value New value
Seealso:value(), valueChanged()Warning:
The value is clipped when it lies outside the range.
voidQwtWheel::setViewAngle(doubleangle)[slot]
Specify the visible portion of the wheel. You may use this function for fine-tuning the appearance of the
wheel. The default value is 175 degrees. The value is limited from 10 to 175 degrees.
Parameters:angle Visible angle in degrees
Seealso:viewAngle(), setTotalAngle()voidQwtWheel::setWheelBorderWidth(intborderWidth)
Set the wheel border width of the wheel. The wheel border must not be smaller than 1 and is limited in
dependence on the wheel's size. Values outside the allowed range will be clipped.
The wheel border defaults to 2.
Parameters:borderWidth Border width
Seealso:
internalBorder()
voidQwtWheel::setWheelWidth(intwidth)
Set the width of the wheel. Corresponds to the wheel height for horizontal orientation, and the wheel
width for vertical orientation.
Parameters:width the wheel's width
Seealso:wheelWidth()voidQwtWheel::setWrapping(boolon)
En/Disable wrapping. If wrapping is true stepping up from maximum() value will take you to the minimum()
value and vice versa.
Parameters:on En/Disable wrapping
Seealso:wrapping()doubleQwtWheel::singleStep()constReturns:
Single step size
Seealso:setSingleStep()QSizeQwtWheel::sizeHint()const[protected],[virtual]Returns:
a size hint
boolQwtWheel::stepAlignment()constReturns:
True, when the step alignment is enabled
Seealso:setStepAlignment(), singleStep()intQwtWheel::tickCount()constReturns:
Number of grooves in the wheel's surface.
Seealso:
setTickCnt()
voidQwtWheel::timerEvent(QTimerEvent*event)[protected],[virtual]
Qt timer event. The flying wheel effect is implemented using a timer
Parameters:event Timer event
Seealso:updateInterval()doubleQwtWheel::totalAngle()constReturns:
Total angle which the wheel can be turned.
Seealso:setTotalAngle()intQwtWheel::updateInterval()constReturns:
Update interval when the wheel is flying
Seealso:setUpdateInterval(), mass(), isTracking()doubleQwtWheel::value()constReturns:
Current value of the wheel
Seealso:setValue(), valueChanged()doubleQwtWheel::valueAt(constQPoint&pos)const[protected],[virtual]
Determine the value corresponding to a specified point
Parameters:pos Position
Returns:
Value corresponding to pos
voidQwtWheel::valueChanged(doublevalue)[signal]
Notify a change of value. When tracking is enabled this signal will be emitted every time the value
changes.
Parameters:value new value
Seealso:setTracking()doubleQwtWheel::viewAngle()constReturns:
Visible portion of the wheel
Seealso:setViewAngle(), totalAngle()intQwtWheel::wheelBorderWidth()constReturns:
Wheel border width
Seealso:setWheelBorderWidth()voidQwtWheel::wheelEvent(QWheelEvent*event)[protected],[virtual]
Handle wheel events. In/Decrement the value
Parameters:event Wheel event
voidQwtWheel::wheelMoved(doublevalue)[signal]
This signal is emitted when the user moves the wheel with the mouse.
Parameters:value new value
voidQwtWheel::wheelPressed()[signal]
This signal is emitted when the user presses the the wheel with the mouse
QRectQwtWheel::wheelRect()const[protected]Returns:
Rectangle of the wheel without the outer border
voidQwtWheel::wheelReleased()[signal]
This signal is emitted when the user releases the mouse
intQwtWheel::wheelWidth()constReturns:
Width of the wheel
Seealso:setWheelWidth()boolQwtWheel::wrapping()constReturns:
True, when wrapping is set
Seealso:setWrapping()
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