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.
Definition at line 25 of file qwt_wheel.h.
Public Member Functions | |
QwtWheel (QWidget *parent=NULL) | |
virtual | ~QwtWheel () |
virtual void | setOrientation (Qt::Orientation) |
double | totalAngle () const |
double | viewAngle () const |
int | tickCnt () const |
int | internalBorder () const |
double | mass () const |
void | setTotalAngle (double angle) |
void | setTickCnt (int cnt) |
void | setViewAngle (double angle) |
void | setInternalBorder (int width) |
void | setMass (double val) |
void | setWheelWidth (int w) |
virtual QSize | sizeHint () const |
virtual QSize | minimumSizeHint () const |
Protected Member Functions | |
virtual void | resizeEvent (QResizeEvent *e) |
virtual void | paintEvent (QPaintEvent *e) |
void | layoutWheel (bool update=true) |
void | draw (QPainter *p, const QRect &update_rect) |
void | drawWheel (QPainter *p, const QRect &r) |
void | drawWheelBackground (QPainter *p, const QRect &r) |
void | setColorArray () |
virtual void | valueChange () |
virtual void | paletteChange (const QPalette &) |
virtual double | getValue (const QPoint &p) |
virtual void | getScrollMode (const QPoint &p, int &scrollMode, int &direction) |
QwtWheel::QwtWheel | ( | QWidget * | parent = NULL |
) | [explicit] |
QwtWheel::~QwtWheel | ( | ) | [virtual] |
void QwtWheel::setOrientation | ( | Qt::Orientation | o | ) | [virtual] |
Set the wheel's orientation.
o | Orientation. Allowed values are Qt::Horizontal and Qt::Vertical. Defaults to Qt::Horizontal. |
Reimplemented from QwtAbstractSlider.
Definition at line 325 of file qwt_wheel.cpp.
References layoutWheel(), QwtAbstractSlider::orientation(), and QwtAbstractSlider::setOrientation().
double QwtWheel::mass | ( | ) | const [virtual] |
Reimplemented from QwtAbstractSlider.
Definition at line 168 of file qwt_wheel.cpp.
References QwtAbstractSlider::mass().
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 |
Definition at line 304 of file qwt_wheel.cpp.
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 |
Definition at line 154 of file qwt_wheel.cpp.
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 |
Definition at line 359 of file qwt_wheel.cpp.
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 |
Definition at line 183 of file qwt_wheel.cpp.
References layoutWheel().
void QwtWheel::setMass | ( | double | val | ) | [virtual] |
Set the mass of the wheel.
Assigning a mass turns the wheel into a flywheel.
val | the wheel's mass |
Reimplemented from QwtAbstractSlider.
Definition at line 612 of file qwt_wheel.cpp.
References QwtAbstractSlider::setMass().
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 |
Definition at line 624 of file qwt_wheel.cpp.
References layoutWheel().
QSize QwtWheel::sizeHint | ( | ) | const [virtual] |
QSize QwtWheel::minimumSizeHint | ( | ) | const [virtual] |
Return a minimum size hint.
Definition at line 642 of file qwt_wheel.cpp.
References QwtAbstractSlider::orientation().
Referenced by sizeHint().
void QwtWheel::resizeEvent | ( | QResizeEvent * | e | ) | [protected, virtual] |
void QwtWheel::paintEvent | ( | QPaintEvent * | e | ) | [protected, virtual] |
void QwtWheel::layoutWheel | ( | bool | update = true |
) | [protected] |
Recalculate the slider's geometry and layout based on.
Definition at line 533 of file qwt_wheel.cpp.
Referenced by resizeEvent(), setInternalBorder(), setOrientation(), and setWheelWidth().
void QwtWheel::draw | ( | QPainter * | p, | |
const QRect & | update_rect | |||
) | [protected] |
Redraw panel and wheel.
Definition at line 564 of file qwt_wheel.cpp.
References drawWheel().
Referenced by paintEvent().
void QwtWheel::drawWheel | ( | QPainter * | p, | |
const QRect & | r | |||
) | [protected] |
Redraw the wheel.
p | painter | |
r | contents rectangle |
Definition at line 375 of file qwt_wheel.cpp.
References drawWheelBackground(), QwtDoubleRange::maxValue(), QwtDoubleRange::minValue(), QwtAbstractSlider::orientation(), and QwtDoubleRange::value().
Referenced by draw().
void QwtWheel::drawWheelBackground | ( | QPainter * | p, | |
const QRect & | r | |||
) | [protected] |
Draw the Wheel's background gradient.
Definition at line 197 of file qwt_wheel.cpp.
References QwtAbstractSlider::orientation(), and setColorArray().
Referenced by drawWheel().
void QwtWheel::setColorArray | ( | ) | [protected] |
Set up the color array for the background pixmap.
Definition at line 96 of file qwt_wheel.cpp.
Referenced by drawWheelBackground().
void QwtWheel::valueChange | ( | ) | [protected, virtual] |
Notify value change.
Reimplemented from QwtAbstractSlider.
Definition at line 582 of file qwt_wheel.cpp.
References QwtAbstractSlider::valueChange().
void QwtWheel::paletteChange | ( | const QPalette & | ) | [protected, virtual] |
double QwtWheel::getValue | ( | const QPoint & | p | ) | [protected, virtual] |
Determine the value corresponding to a specified point.
Implements QwtAbstractSlider.
Definition at line 494 of file qwt_wheel.cpp.
References QwtDoubleRange::maxValue(), QwtDoubleRange::minValue(), and QwtAbstractSlider::orientation().
void QwtWheel::getScrollMode | ( | const QPoint & | p, | |
int & | scrollMode, | |||
int & | direction | |||
) | [protected, virtual] |
Determine the scrolling mode and direction corresponding to a specified point.
p | point | |
scrollMode | scrolling mode | |
direction | direction |
Implements QwtAbstractSlider.
Definition at line 596 of file qwt_wheel.cpp.