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QwtWheel(3) Qwt User's Guide QwtWheel(3)

QwtWheel -

#include <qwt_wheel.h>
Inherits QwtAbstractSlider.


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
 


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 ()
 

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.
See also:
The radio example.

Redraw panel and wheel
Parameters:
painter Painter

Redraw the wheel. Parameters:
painter painter
 
r contents rectangle

Draw the Wheel's background gradient
Parameters:
painter Painter
 
r Bounding rectangle

Determine the scrolling mode and direction corresponding to a specified point. Parameters:
p point
 
scrollMode scrolling mode
 
direction direction
Implements QwtAbstractSlider.

Returns:
Internal border width of the wheel.
See also:
setInternalBorder()

Returns:
mass
Reimplemented from QwtAbstractSlider.

Return a minimum size hint. Warning:
The return value is based on the wheel width.

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.
Parameters:
w border width
See also:
internalBorder()

Set the mass of the wheel. Assigning a mass turns the wheel into a flywheel.
Parameters:
val the wheel's mass
Reimplemented from QwtAbstractSlider.

Set the wheel's orientation. Parameters:
o Orientation. Allowed values are Qt::Horizontal and Qt::Vertical. Defaults to Qt::Horizontal.
See also:
QwtAbstractSlider::orientation()
Reimplemented from QwtAbstractSlider.

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.
Parameters:
cnt Number of grooves per 360 degrees
See also:
tickCnt()

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
See also:
totalAngle()

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
See also:
viewAngle(), setTotalAngle()

Set the width of the wheel. Corresponds to the wheel height for horizontal orientation, and the wheel width for vertical orientation.
Parameters:
w the wheel's width

Returns:
a size hint

Returns:
Number of grooves in the wheel's surface.
See also:
setTickCnt()

Returns:
Total angle which the wheel can be turned.
See also:
setTotalAngle()

Returns:
Visible portion of the wheel
See also:
setViewAngle(), totalAngle()

Generated automatically by Doxygen for Qwt User's Guide from the source code.
Tue Nov 20 2012 Version 5.2.3

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