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Qwt User's Guide
6.2.0
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Canvas of a QwtPolarPlot. More...
#include <qwt_polar_canvas.h>
Public Types | |
| enum | PaintAttribute { BackingStore = 0x01 } |
| Paint attributes. More... | |
| typedef QFlags< PaintAttribute > | PaintAttributes |
Public Member Functions | |
| QwtPolarCanvas (QwtPolarPlot *) | |
| Constructor. | |
| virtual | ~QwtPolarCanvas () |
| Destructor. | |
| QwtPolarPlot * | plot () |
| const QwtPolarPlot * | plot () const |
| void | setPaintAttribute (PaintAttribute, bool on=true) |
| Changing the paint attributes. More... | |
| bool | testPaintAttribute (PaintAttribute) const |
| const QPixmap * | backingStore () const |
| void | invalidateBackingStore () |
| Invalidate the internal backing store. | |
| QwtPointPolar | invTransform (const QPoint &) const |
| QPoint | transform (const QwtPointPolar &) const |
Protected Member Functions | |
| virtual void | paintEvent (QPaintEvent *) override |
| virtual void | resizeEvent (QResizeEvent *) override |
Canvas of a QwtPolarPlot.
The canvas is the widget, where all polar items are painted to.
Definition at line 27 of file qwt_polar_canvas.h.
| typedef QFlags<PaintAttribute > QwtPolarCanvas::PaintAttributes |
An ORed combination of PaintAttribute values.
Definition at line 50 of file qwt_polar_canvas.h.
Paint attributes.
The default setting enables BackingStore
| Enumerator | |
|---|---|
| BackingStore | Paint double buffered and reuse the content of the pixmap buffer for some spontaneous repaints that happen when a plot gets unhidden, deiconified or changes the focus. |
Definition at line 40 of file qwt_polar_canvas.h.
| const QPixmap * QwtPolarCanvas::backingStore | ( | ) | const |
Definition at line 170 of file qwt_polar_canvas.cpp.
| QwtPointPolar QwtPolarCanvas::invTransform | ( | const QPoint & | pos | ) | const |
Translate a point from widget into plot coordinates
| pos | Point in widget coordinates of the plot canvas |
Definition at line 267 of file qwt_polar_canvas.cpp.
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overrideprotectedvirtual |
| QwtPolarPlot * QwtPolarCanvas::plot | ( | ) |
Definition at line 97 of file qwt_polar_canvas.cpp.
| const QwtPolarPlot * QwtPolarCanvas::plot | ( | ) | const |
Definition at line 103 of file qwt_polar_canvas.cpp.
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overrideprotectedvirtual |
| void QwtPolarCanvas::setPaintAttribute | ( | PaintAttribute | attribute, |
| bool | on = true |
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Changing the paint attributes.
| attribute | Paint attribute |
| on | On/Off |
The default setting enables BackingStore
Definition at line 118 of file qwt_polar_canvas.cpp.
| bool QwtPolarCanvas::testPaintAttribute | ( | PaintAttribute | attribute | ) | const |
Test whether a paint attribute is enabled
| attribute | Paint attribute |
Definition at line 164 of file qwt_polar_canvas.cpp.
| QPoint QwtPolarCanvas::transform | ( | const QwtPointPolar & | polarPos | ) | const |
Translate a point from plot into widget coordinates
| polarPos | Point in plot coordinates |
Definition at line 310 of file qwt_polar_canvas.cpp.