conflicting packages
QwtKnob(3) | Qwt User's Guide | QwtKnob(3) |
NAME¶
QwtKnob -SYNOPSIS¶
#include <qwt_knob.h> Inherits QwtAbstractSlider, and QwtAbstractScale.Public Types¶
enum Symbol { Line, Dot }
Public Member Functions¶
QwtKnob (QWidget *parent=NULL)
Protected Member Functions¶
void draw (QPainter *p, const QRect &ur)
Additional Inherited 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¶
enum QwtKnob::Symbol¶
Symbol See also:QwtKnob::QwtKnob()
Constructor & Destructor Documentation¶
QwtKnob::QwtKnob (QWidget *parent = NULL) [explicit]¶
Constructor Parameters:parent Parent widget
Member Function Documentation¶
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, doublearc, const QColor &c) [protected]¶
Draw the marker at the knob's front. Parameters:p Painter
arc Angle of the marker
c Marker color
QSize QwtKnob::minimumSizeHint () const [virtual]¶
Return a minimum size hint. Warning:The return value of QwtKnob::minimumSizeHint()
depends on the font and the scale.
void QwtKnob::paintEvent (QPaintEvent *e) [protected], [virtual]¶
Repaint the knob Parameters:e Paint event
void QwtKnob::resizeEvent (QResizeEvent *e) [protected], [virtual]¶
Qt Resize Eventconst QwtRoundScaleDraw * QwtKnob::scaleDraw () const¶
Returns:the scale draw of the knob
See also:
setScaleDraw()
QwtRoundScaleDraw * QwtKnob::scaleDraw ()¶
Returns:the scale draw of the knob
See also:
setScaleDraw()
void QwtKnob::setBorderWidth (intbw)¶
Set the knob's border width. Parameters:bw new border width
void QwtKnob::setKnobWidth (intw)¶
Change the knob's width. The specified width must be >= 5, or it will be clipped. Parameters: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(). See also:scaleDraw()
void QwtKnob::setSymbol ( QwtKnob::Symbols)¶
Set the symbol of the knob. See also:symbol()
void QwtKnob::setTotalAngle (doubleangle)¶
Set the total angle by which the knob can be turned. Parameters:angle Angle in degrees.
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]¶
Returns:minimumSizeHint()
QwtKnob::Symbol QwtKnob::symbol () const¶
Returns:symbol of the knob
See also:
setSymbol()
Author¶
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