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Qwt User's Guide
5.2.3
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#include <qwt_wheel.h>

Public Member Functions | |
| QwtWheel (QWidget *parent=NULL) | |
| virtual | ~QwtWheel () |
| int | internalBorder () const |
| double | mass () const |
| virtual QSize | minimumSizeHint () const |
| void | setInternalBorder (int width) |
| void | setMass (double val) |
| virtual void | setOrientation (Qt::Orientation) |
| void | setTickCnt (int cnt) |
| void | setTotalAngle (double angle) |
| void | setViewAngle (double angle) |
| void | setWheelWidth (int w) |
| virtual QSize | sizeHint () const |
| int | tickCnt () const |
| double | totalAngle () const |
| double | viewAngle () const |
Public Member Functions inherited from QwtAbstractSlider | |
| QwtAbstractSlider (Qt::Orientation, QWidget *parent=NULL) | |
| virtual | ~QwtAbstractSlider () |
| bool | isReadOnly () const |
| bool | isValid () const |
| Qt::Orientation | orientation () const |
| void | setTracking (bool enable) |
| void | setUpdateTime (int t) |
| void | setValid (bool valid) |
| void | stopMoving () |
Public Member Functions inherited from QwtDoubleRange | |
| QwtDoubleRange () | |
| virtual | ~QwtDoubleRange () |
| virtual void | incPages (int) |
| double | maxValue () const |
| double | minValue () const |
| int | pageSize () const |
| bool | periodic () const |
| void | setPeriodic (bool tf) |
| void | setRange (double vmin, double vmax, double vstep=0.0, int pagesize=1) |
| void | setStep (double) |
| double | step () const |
| double | value () const |
Protected Member Functions | |
| void | draw (QPainter *, const QRect &) |
| void | drawWheel (QPainter *, const QRect &) |
| void | drawWheelBackground (QPainter *, const QRect &) |
| virtual void | getScrollMode (const QPoint &, int &scrollMode, int &direction) |
| virtual double | getValue (const QPoint &) |
| void | layoutWheel (bool update=true) |
| virtual void | paintEvent (QPaintEvent *e) |
| virtual void | paletteChange (const QPalette &) |
| virtual void | resizeEvent (QResizeEvent *e) |
| void | setColorArray () |
| virtual void | valueChange () |
Protected Member Functions inherited from QwtAbstractSlider | |
| virtual void | keyPressEvent (QKeyEvent *e) |
| virtual void | mouseMoveEvent (QMouseEvent *e) |
| double | mouseOffset () const |
| virtual void | mousePressEvent (QMouseEvent *e) |
| virtual void | mouseReleaseEvent (QMouseEvent *e) |
| int | scrollMode () const |
| void | setMouseOffset (double) |
| virtual void | setPosition (const QPoint &) |
| virtual void | timerEvent (QTimerEvent *e) |
| virtual void | wheelEvent (QWheelEvent *e) |
Protected Member Functions inherited from QwtDoubleRange | |
| double | exactPrevValue () const |
| double | exactValue () const |
| double | prevValue () const |
| virtual void | rangeChange () |
| virtual void | stepChange () |
Additional Inherited Members | |
Public Types inherited from QwtAbstractSlider | |
| enum | ScrollMode { ScrNone, ScrMouse, ScrTimer, ScrDirect, ScrPage } |
Public Slots inherited from QwtAbstractSlider | |
| virtual void | fitValue (double val) |
| virtual void | incValue (int steps) |
| virtual void | setReadOnly (bool) |
| virtual void | setValue (double val) |
Signals inherited from QwtAbstractSlider | |
| void | sliderMoved (double value) |
| void | sliderPressed () |
| void | sliderReleased () |
| void | valueChanged (double value) |
The Wheel Widget.
The wheel widget can be used to change values over a very large range in very small steps. Using the setMass member, it can be configured as a flywheel.
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protected |
Redraw panel and wheel
| painter | Painter |
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protected |
Redraw the wheel.
| painter | painter |
| r | contents rectangle |
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protected |
Draw the Wheel's background gradient
| painter | Painter |
| r | Bounding rectangle |
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protectedvirtual |
Determine the scrolling mode and direction corresponding to a specified point.
| p | point |
| scrollMode | scrolling mode |
| direction | direction |
Implements QwtAbstractSlider.
| int QwtWheel::internalBorder | ( | ) | const |
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virtual |
Reimplemented from QwtAbstractSlider.
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Return a minimum size hint.
| void QwtWheel::setInternalBorder | ( | int | w | ) |
Set the internal border width of the wheel.
The internal 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 internal border defaults to 2.
| w | border width |
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virtual |
Set the mass of the wheel.
Assigning a mass turns the wheel into a flywheel.
| val | the wheel's mass |
Reimplemented from QwtAbstractSlider.
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virtual |
Set the wheel's orientation.
| o | Orientation. Allowed values are Qt::Horizontal and Qt::Vertical. Defaults to Qt::Horizontal. |
Reimplemented from QwtAbstractSlider.
| void QwtWheel::setTickCnt | ( | int | cnt | ) |
Adjust the number of grooves in the wheel's surface.
The number of grooves is limited to 6 <= cnt <= 50. Values outside this range will be clipped. The default value is 10.
| cnt | Number of grooves per 360 degrees |
| void QwtWheel::setTotalAngle | ( | double | angle | ) |
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.
| angle | total angle in degrees |
| void QwtWheel::setViewAngle | ( | double | angle | ) |
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.
| angle | Visible angle in degrees |
| void QwtWheel::setWheelWidth | ( | int | w | ) |
Set the width of the wheel.
Corresponds to the wheel height for horizontal orientation, and the wheel width for vertical orientation.
| w | the wheel's width |
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virtual |
| int QwtWheel::tickCnt | ( | ) | const |
| double QwtWheel::totalAngle | ( | ) | const |
| double QwtWheel::viewAngle | ( | ) | const |
1.8.1