QwtKnob Class Reference
The Knob Widget.
More...
#include <qwt_knob.h>
List of all members.
Detailed Description
The Knob Widget.
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.
- See also:
- QwtAbstractSlider and QwtAbstractScale for the descriptions of the inherited members.
Member Enumeration Documentation
Constructor & Destructor Documentation
QwtKnob::QwtKnob |
( |
QWidget * |
parent = NULL |
) |
[explicit] |
QwtKnob::~QwtKnob |
( |
|
) |
[virtual] |
Member Function Documentation
int QwtKnob::borderWidth |
( |
|
) |
const |
void QwtKnob::draw |
( |
QPainter * |
painter, |
|
|
const QRect & |
rect | |
|
) |
| | [protected] |
Repaint the knob
- Parameters:
-
| painter | Painter |
| rect | Update rectangle |
void QwtKnob::drawKnob |
( |
QPainter * |
painter, |
|
|
const QRect & |
r | |
|
) |
| | [protected] |
Draw the knob.
- Parameters:
-
| 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.
- Parameters:
-
| 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] |
void QwtKnob::paintEvent |
( |
QPaintEvent * |
e |
) |
[protected, virtual] |
Repaint the knob
- Parameters:
-
void QwtKnob::resizeEvent |
( |
QResizeEvent * |
e |
) |
[protected, virtual] |
void QwtKnob::setBorderWidth |
( |
int |
bw |
) |
|
Set the knob's border width.
- Parameters:
-
void QwtKnob::setKnobWidth |
( |
int |
w |
) |
|
Change the knob's width.
The specified width must be >= 5, or it will be clipped.
- Parameters:
-
Set the symbol of the knob.
- See also:
- symbol()
void QwtKnob::setTotalAngle |
( |
double |
angle |
) |
|
Set the total angle by which the knob can be turned.
- Parameters:
-
The default angle is 270 degrees. It is possible to specify an angle of more than 360 degrees so that the knob can be turned several times around its axis.
QSize QwtKnob::sizeHint |
( |
|
) |
const [virtual] |
double QwtKnob::totalAngle |
( |
|
) |
const |