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Qwt User's Guide
6.0.2
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#include <qwt_slider.h>

Public Types | |
| enum | BackgroundStyle { Trough = 0x01, Groove = 0x02 } |
| typedef QFlags< BackgroundStyle > | BackgroundStyles |
| enum | ScalePos { NoScale, LeftScale, RightScale, TopScale, BottomScale } |
Public Types inherited from QwtAbstractSlider | |
| enum | ScrollMode { ScrNone, ScrMouse, ScrTimer, ScrDirect, ScrPage } |
Public Member Functions | |
| QwtSlider (QWidget *parent, Qt::Orientation=Qt::Horizontal, ScalePos=NoScale, BackgroundStyles=Trough) | |
| BackgroundStyles | backgroundStyle () const |
| int | borderWidth () const |
| QSize | handleSize () const |
| virtual QSize | minimumSizeHint () const |
| const QwtScaleDraw * | scaleDraw () const |
| ScalePos | scalePosition () const |
| void | setBackgroundStyle (BackgroundStyles) |
| void | setBorderWidth (int bw) |
| void | setHandleSize (int width, int height) |
| void | setHandleSize (const QSize &) |
| virtual void | setOrientation (Qt::Orientation) |
| void | setScaleDraw (QwtScaleDraw *) |
| void | setScalePosition (ScalePos s) |
| void | setSpacing (int) |
| virtual QSize | sizeHint () const |
| int | spacing () const |
Public Member Functions inherited from QwtAbstractSlider | |
| QwtAbstractSlider (Qt::Orientation, QWidget *parent=NULL) | |
| virtual | ~QwtAbstractSlider () |
| bool | isReadOnly () const |
| bool | isValid () const |
| virtual double | mass () const |
| Qt::Orientation | orientation () const |
| virtual void | setMass (double val) |
| 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 |
Public Member Functions inherited from QwtAbstractScale | |
| QwtAbstractScale () | |
| virtual | ~QwtAbstractScale () |
| bool | autoScale () const |
| const QwtScaleEngine * | scaleEngine () const |
| QwtScaleEngine * | scaleEngine () |
| const QwtScaleMap & | scaleMap () const |
| int | scaleMaxMajor () const |
| int | scaleMaxMinor () const |
| void | setAutoScale () |
| void | setScale (double vmin, double vmax, double step=0.0) |
| void | setScale (const QwtInterval &, double step=0.0) |
| void | setScale (const QwtScaleDiv &) |
| void | setScaleEngine (QwtScaleEngine *) |
| void | setScaleMaxMajor (int ticks) |
| void | setScaleMaxMinor (int ticks) |
Protected Member Functions | |
| virtual void | changeEvent (QEvent *) |
| virtual void | drawHandle (QPainter *, const QRect &, int pos) const |
| virtual void | drawSlider (QPainter *, const QRect &) const |
| virtual void | getScrollMode (const QPoint &p, QwtAbstractSlider::ScrollMode &, int &direction) const |
| virtual double | getValue (const QPoint &p) |
| virtual void | paintEvent (QPaintEvent *) |
| virtual void | rangeChange () |
| virtual void | resizeEvent (QResizeEvent *) |
| virtual void | scaleChange () |
| QwtScaleDraw * | scaleDraw () |
| int | transform (double v) const |
| 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 | stepChange () |
Protected Member Functions inherited from QwtAbstractScale | |
| const QwtAbstractScaleDraw * | abstractScaleDraw () const |
| QwtAbstractScaleDraw * | abstractScaleDraw () |
| void | rescale (double vmin, double vmax, double step=0.0) |
| void | setAbstractScaleDraw (QwtAbstractScaleDraw *) |
Additional Inherited Members | |
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 Slider Widget.
QwtSlider is a slider widget which operates on an interval of type double. QwtSlider supports different layouts as well as a scale.
| enum QwtSlider::ScalePos |
Scale position. QwtSlider tries to enforce valid combinations of its orientation and scale position:
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explicit |
Constructor.
| parent | parent widget |
| orientation | Orientation of the slider. Can be Qt::Horizontal or Qt::Vertical. Defaults to Qt::Horizontal. |
| scalePos | Position of the scale. Defaults to QwtSlider::NoScale. |
| bgStyle | Background style. QwtSlider::Trough draws the slider button in a trough, QwtSlider::Slot draws a slot underneath the button. An or-combination of both may also be used. The default is QwtSlider::Trough. |
QwtSlider enforces valid combinations of its orientation and scale position. If the combination is invalid, the scale position will be set to NoScale. Valid combinations are:
| QwtSlider::BackgroundStyles QwtSlider::backgroundStyle | ( | ) | const |
| int QwtSlider::borderWidth | ( | ) | const |
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protectedvirtual |
Draw the thumb at a position
| painter | Painter |
| sliderRect | Bounding rectangle of the slider |
| pos | Position of the slider thumb |
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protectedvirtual |
Draw the slider into the specified rectangle.
| painter | Painter |
| sliderRect | Bounding rectangle of the slider |
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protectedvirtual |
Determine scrolling mode and direction.
| p | point |
| scrollMode | Scrolling mode |
| direction | Direction |
Implements QwtAbstractSlider.
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protectedvirtual |
Determine the value corresponding to a specified mouse location.
| pos | Mouse position |
Implements QwtAbstractSlider.
| QSize QwtSlider::handleSize | ( | ) | const |
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virtual |
Return a minimum size hint.
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protectedvirtual |
Qt paint event
| event | Paint event |
| const QwtScaleDraw * QwtSlider::scaleDraw | ( | ) | const |
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protected |
| void QwtSlider::setBackgroundStyle | ( | BackgroundStyles | style | ) |
Set the background style.
| void QwtSlider::setBorderWidth | ( | int | width | ) |
Change the slider's border width.
| width | Border width |
| void QwtSlider::setHandleSize | ( | int | width, |
| int | height | ||
| ) |
| void QwtSlider::setHandleSize | ( | const QSize & | size | ) |
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virtual |
Set the orientation.
| o | Orientation. Allowed values are Qt::Horizontal and Qt::Vertical. |
If the new orientation and the old scale position are an invalid combination, the scale position will be set to QwtSlider::NoScale.
Reimplemented from QwtAbstractSlider.
| void QwtSlider::setScaleDraw | ( | QwtScaleDraw * | scaleDraw | ) |
Set a scale draw.
For changing the labels of the scales, it is necessary to derive from QwtScaleDraw and overload QwtScaleDraw::label().
| scaleDraw | ScaleDraw object, that has to be created with new and will be deleted in ~QwtSlider or the next call of setScaleDraw(). |
| void QwtSlider::setScalePosition | ( | ScalePos | scalePos | ) |
Change the scale position (and slider orientation).
| scalePos | Position of the scale. |
A valid combination of scale position and orientation is enforced:
| void QwtSlider::setSpacing | ( | int | spacing | ) |
Change the spacing between pipe and scale.
A spacing of 0 means, that the backbone of the scale is below the trough.
The default setting is 4 pixels.
| spacing | Number of pixels |
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virtual |
| int QwtSlider::spacing | ( | ) | const |
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protected |
Map and round a value into widget coordinates
| value | Value |
1.8.1