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Qwt User's Guide 6.3.0
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Base class for needles that can be used in a QwtDial. More...
#include <qwt_dial_needle.h>
Public Member Functions | |
| QwtDialNeedle () | |
| Constructor. | |
| virtual | ~QwtDialNeedle () |
| Destructor. | |
| virtual void | setPalette (const QPalette &) |
| const QPalette & | palette () const |
| virtual void | draw (QPainter *, const QPointF ¢er, double length, double direction, QPalette::ColorGroup=QPalette::Active) const |
Protected Member Functions | |
| virtual void | drawNeedle (QPainter *painter, double length, QPalette::ColorGroup colorGroup) const =0 |
| Draw the needle. | |
| virtual void | drawKnob (QPainter *, double width, const QBrush &, bool sunken) const |
| Draw the knob. | |
Base class for needles that can be used in a QwtDial.
QwtDialNeedle is a pointer that indicates a value by pointing to a specific direction.
Definition at line 27 of file qwt_dial_needle.h.
| QwtDialNeedle::QwtDialNeedle | ( | ) |
Constructor.
Definition at line 182 of file qwt_dial_needle.cpp.
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virtual |
Destructor.
Definition at line 188 of file qwt_dial_needle.cpp.
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virtual |
Draw the needle
| painter | Painter |
| center | Center of the dial, start position for the needle |
| length | Length of the needle |
| direction | Direction of the needle, in degrees counter clockwise |
| colorGroup | Color group, used for painting |
Definition at line 219 of file qwt_dial_needle.cpp.
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protectedvirtual |
Draw the knob.
Definition at line 234 of file qwt_dial_needle.cpp.
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protectedpure virtual |
Draw the needle.
The origin of the needle is at position (0.0, 0.0 ) pointing in direction 0.0 ( = east ).
The painter is already initialized with translation and rotation.
| painter | Painter |
| length | Length of the needle |
| colorGroup | Color group, used for painting |
Implemented in QwtDialSimpleNeedle, QwtCompassMagnetNeedle, and QwtCompassWindArrow.
| const QPalette & QwtDialNeedle::palette | ( | ) | const |
Definition at line 205 of file qwt_dial_needle.cpp.
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virtual |
Sets the palette for the needle.
| palette | New Palette |
Definition at line 197 of file qwt_dial_needle.cpp.