#include <qwt_knob.h>

Public Types | |
| enum | Symbol { Line, Dot } |
Public Member Functions | |
| QwtKnob (QWidget *parent=NULL) | |
| virtual | ~QwtKnob () |
| void | setKnobWidth (int w) |
| int | knobWidth () const |
| void | setTotalAngle (double angle) |
| double | totalAngle () const |
| void | setBorderWidth (int bw) |
| int | borderWidth () const |
| void | setSymbol (Symbol) |
| Symbol | symbol () const |
| virtual QSize | sizeHint () const |
| virtual QSize | minimumSizeHint () const |
| void | setScaleDraw (QwtRoundScaleDraw *) |
| const QwtRoundScaleDraw * | scaleDraw () const |
| QwtRoundScaleDraw * | scaleDraw () |
Protected Member Functions | |
| virtual void | paintEvent (QPaintEvent *e) |
| virtual void | resizeEvent (QResizeEvent *e) |
| void | draw (QPainter *p, const QRect &ur) |
| void | drawKnob (QPainter *p, const QRect &r) |
| void | drawMarker (QPainter *p, double arc, const QColor &c) |
The QwtKnob widget imitates look and behaviour of a volume knob on a radio. It contains a scale around the knob which is set up automatically or can be configured manually (see QwtAbstractScale). Automatic scrolling is enabled when the user presses a mouse button on the scale. For a description of signals, slots and other members, see QwtAbstractSlider.
| enum QwtKnob::Symbol |
Symbol
| QwtKnob::QwtKnob | ( | QWidget * | parent = NULL |
) | [explicit] |
Constructor
| parent | Parent widget |
| QwtKnob::~QwtKnob | ( | ) | [virtual] |
Destructor.
| int QwtKnob::borderWidth | ( | ) | const |
Return the border width.
| void QwtKnob::draw | ( | QPainter * | painter, | |
| const QRect & | rect | |||
| ) | [protected] |
Repaint the knob
| painter | Painter | |
| rect | Update rectangle |
| void QwtKnob::drawKnob | ( | QPainter * | painter, | |
| const QRect & | r | |||
| ) | [protected] |
Draw the knob.
| painter | painter | |
| r | Bounding rectangle of the knob (without scale) |
| void QwtKnob::drawMarker | ( | QPainter * | p, | |
| double | arc, | |||
| const QColor & | c | |||
| ) | [protected] |
Draw the marker at the knob's front.
| p | Painter | |
| arc | Angle of the marker | |
| c | Marker color |
| int QwtKnob::knobWidth | ( | ) | const |
Return the width of the knob.
| QSize QwtKnob::minimumSizeHint | ( | ) | const [virtual] |
Return a minimum size hint.
| void QwtKnob::paintEvent | ( | QPaintEvent * | e | ) | [protected, virtual] |
Repaint the knob
| e | Paint event |
| void QwtKnob::resizeEvent | ( | QResizeEvent * | e | ) | [protected, virtual] |
Qt Resize Event
| QwtRoundScaleDraw * QwtKnob::scaleDraw | ( | ) |
| const QwtRoundScaleDraw * QwtKnob::scaleDraw | ( | ) | const |
| void QwtKnob::setBorderWidth | ( | int | bw | ) |
Set the knob's border width.
| bw | new border width |
| void QwtKnob::setKnobWidth | ( | int | w | ) |
Change the knob's width.
The specified width must be >= 5, or it will be clipped.
| w | New width |
| void QwtKnob::setScaleDraw | ( | QwtRoundScaleDraw * | scaleDraw | ) |
Change the scale draw of the knob
For changing the labels of the scales, it is necessary to derive from QwtRoundScaleDraw and overload QwtRoundScaleDraw::label().
| void QwtKnob::setSymbol | ( | QwtKnob::Symbol | s | ) |
| void QwtKnob::setTotalAngle | ( | double | angle | ) |
Set the total angle by which the knob can be turned.
| angle | Angle in degrees. |
| QSize QwtKnob::sizeHint | ( | ) | const [virtual] |
| QwtKnob::Symbol QwtKnob::symbol | ( | ) | const |
| double QwtKnob::totalAngle | ( | ) | const |
Return the total angle.
1.5.8