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.TH "QwtPainter" 3 "11 Jun 2007" "Version 5.0.2" "Qwt User's Guide" \" -*- nroff -*-
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.SH "Detailed Description"
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A collection of QPainter workarounds.
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1) Clipping to coordinate system limits (Qt3 only)
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On X11 pixel coordinates are stored in shorts. Qt produces overruns when mapping QCOORDS to shorts.
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2) Scaling to device metrics
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QPainter scales fonts, line and fill patterns to the metrics of the paint device. Other values like the geometries of rects, points remain device independend. To enable a device independent widget implementation, \fBQwtPainter\fP adds scaling of these geometries. (Unfortunately QPainter::scale scales both types of paintings, so the objects of the first type would be scaled twice).
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Definition at line 62 of file qwt_painter.h.
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.SS "Static Public Member Functions"
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.RI "static void \fBsetMetricsMap\fP (const QPaintDevice *layout, const QPaintDevice *device)"
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.RI "static void \fBsetMetricsMap\fP (const \fBQwtMetricsMap\fP &)"
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.RI "static void \fBresetMetricsMap\fP ()"
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.RI "static const \fBQwtMetricsMap\fP & \fBmetricsMap\fP ()"
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.RI "static void \fBsetDeviceClipping\fP (bool)"
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.RI "static bool \fBdeviceClipping\fP ()"
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.RI "static void \fBsetClipRect\fP (QPainter *, const QRect &)"
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.RI "static void \fBdrawText\fP (QPainter *, int x, int y, const QString &)"
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.RI "static void \fBdrawText\fP (QPainter *, const QPoint &, const QString &)"
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.RI "static void \fBdrawText\fP (QPainter *, int x, int y, int w, int h, int flags, const QString &)"
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.RI "static void \fBdrawText\fP (QPainter *, const QRect &, int flags, const QString &)"
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.RI "static void \fBdrawSimpleRichText\fP (QPainter *, const QRect &, int flags, QTextDocument &)"
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.RI "static void \fBdrawRect\fP (QPainter *, int x, int y, int w, int h)"
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.RI "static void \fBdrawRect\fP (QPainter *, const QRect &rect)"
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.RI "static void \fBfillRect\fP (QPainter *, const QRect &, const QBrush &)"
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.RI "static void \fBdrawEllipse\fP (QPainter *, const QRect &)"
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.RI "static void \fBdrawPie\fP (QPainter *, const QRect &r, int a, int alen)"
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.RI "static void \fBdrawLine\fP (QPainter *, int x1, int y1, int x2, int y2)"
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.RI "static void \fBdrawLine\fP (QPainter *, const QPoint &p1, const QPoint &p2)"
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.RI "static void \fBdrawPolygon\fP (QPainter *, const QwtPolygon &pa)"
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.RI "static void \fBdrawPolyline\fP (QPainter *, const QwtPolygon &pa)"
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.RI "static void \fBdrawPoint\fP (QPainter *, int x, int y)"
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.RI "static void \fBdrawRoundFrame\fP (QPainter *, const QRect &, int width, const QPalette &, bool sunken)"
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.RI "static void \fBdrawFocusRect\fP (QPainter *, QWidget *)"
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.RI "static void \fBdrawFocusRect\fP (QPainter *, QWidget *, const QRect &)"
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.RI "static QwtPolygon \fBclip\fP (const QwtPolygon &)"
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.RI "static void \fBdrawColorBar\fP (QPainter *painter, const \fBQwtColorMap\fP &, const \fBQwtDoubleInterval\fP &, const \fBQwtScaleMap\fP &, Qt::Orientation, const QRect &)"
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.SH "Member Function Documentation"
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.SS "QwtPolygon QwtPainter::clip (const QwtPolygon &)\fC [static]\fP"
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Definition at line 95 of file qwt_painter.cpp.
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References QwtRect::clip().
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Referenced by drawPolygon(), and drawPolyline().
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.SS "bool QwtPainter::deviceClipping ()\fC [static]\fP"
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Returns whether device clipping is enabled. On X11 the default is enabled, otherwise it is disabled.
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\fBQwtPainter::setDeviceClipping()\fP
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Definition at line 73 of file qwt_painter.cpp.
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.SS "void QwtPainter::drawEllipse (QPainter * painter, const QRect & rect)\fC [static]\fP"
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Wrapper for QPainter::drawEllipse()
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Definition at line 295 of file qwt_painter.cpp.
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References QwtMetricsMap::layoutToDevice().
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Referenced by QwtSymbol::draw(), and QwtPicker::drawRubberBand().
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.SS "void QwtPainter::drawLine (QPainter *, const QPoint & p1, const QPoint & p2)\fC [inline, static]\fP"
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Wrapper for QPainter::drawLine().
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Definition at line 143 of file qwt_painter.h.
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References drawLine().
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.SS "void QwtPainter::drawLine (QPainter * painter, int x1, int y1, int x2, int y2)\fC [static]\fP"
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Wrapper for QPainter::drawLine()
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Definition at line 438 of file qwt_painter.cpp.
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References drawPolyline(), and QwtMetricsMap::isIdentity().
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Referenced by QwtSymbol::draw(), QwtPlotMarker::draw(), QwtScaleDraw::drawBackbone(), QwtPlotSpectrogram::drawContourLines(), QwtLegendItem::drawIdentifier(), drawLine(), QwtPicker::drawRubberBand(), QwtPlotCurve::drawSticks(), and QwtRoundScaleDraw::drawTick().
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.SS "void QwtPainter::drawPie (QPainter * painter, const QRect & rect, int a, int alen)\fC [static]\fP"
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Wrapper for QPainter::drawPie()
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Definition at line 280 of file qwt_painter.cpp.
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References QwtMetricsMap::layoutToDevice().
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.SS "void QwtPainter::drawPoint (QPainter * painter, int x, int y)\fC [static]\fP"
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Wrapper for QPainter::drawPoint()
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Definition at line 548 of file qwt_painter.cpp.
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References QwtMetricsMap::layoutToDevice().
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Referenced by QwtPlotCurve::drawDots().
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.SS "void QwtPainter::drawPolygon (QPainter * painter, const QwtPolygon & pa)\fC [static]\fP"
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Wrapper for QPainter::drawPolygon()
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Definition at line 488 of file qwt_painter.cpp.
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References clip(), and QwtMetricsMap::layoutToDevice().
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Referenced by QwtSymbol::draw(), and QwtPlotCurve::fillCurve().
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.SS "void QwtPainter::drawPolyline (QPainter * painter, const QwtPolygon & pa)\fC [static]\fP"
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Wrapper for QPainter::drawPolyline()
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Definition at line 505 of file qwt_painter.cpp.
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References clip(), and QwtMetricsMap::layoutToDevice().
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Referenced by drawLine(), and drawRect().
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.SS "void QwtPainter::drawRect (QPainter * painter, const QRect & rect)\fC [static]\fP"
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Wrapper for QPainter::drawRect()
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Definition at line 185 of file qwt_painter.cpp.
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References drawPolyline(), fillRect(), and QwtMetricsMap::layoutToDevice().
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.SS "void QwtPainter::drawRect (QPainter * painter, int x, int y, int w, int h)\fC [static]\fP"
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Wrapper for QPainter::drawRect()
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Definition at line 177 of file qwt_painter.cpp.
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Referenced by QwtText::draw(), QwtSymbol::draw(), drawColorBar(), and QwtPicker::drawRubberBand().
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.SS "void QwtPainter::drawRoundFrame (QPainter *, const QRect &, int width, const QPalette &, bool sunken)\fC [static]\fP"
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Definition at line 622 of file qwt_painter.cpp.
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Referenced by QwtDial::drawFrame().
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.SS "void QwtPainter::drawSimpleRichText (QPainter * painter, const QRect & rect, int flags, QTextDocument & text)\fC [static]\fP"
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Wrapper for QSimpleRichText::draw()
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Definition at line 405 of file qwt_painter.cpp.
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References QwtMetricsMap::layoutToDevice().
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Referenced by QwtRichTextEngine::draw().
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.SS "void QwtPainter::drawText (QPainter * painter, const QRect & rect, int flags, const QString & text)\fC [static]\fP"
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Wrapper for QPainter::drawText()
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Definition at line 358 of file qwt_painter.cpp.
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References QwtMetricsMap::layoutToDevice().
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.SS "void QwtPainter::drawText (QPainter * painter, int x, int y, int w, int h, int flags, const QString & text)\fC [static]\fP"
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Wrapper for QPainter::drawText()
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Definition at line 349 of file qwt_painter.cpp.
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References drawText().
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.SS "void QwtPainter::drawText (QPainter * painter, const QPoint & pos, const QString & text)\fC [static]\fP"
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Wrapper for QPainter::drawText()
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Definition at line 333 of file qwt_painter.cpp.
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References QwtMetricsMap::layoutToDevice().
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.SS "void QwtPainter::drawText (QPainter * painter, int x, int y, const QString & text)\fC [static]\fP"
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Wrapper for QPainter::drawText()
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Definition at line 324 of file qwt_painter.cpp.
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Referenced by QwtPlainTextEngine::draw(), and drawText().
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.SS "void QwtPainter::fillRect (QPainter * painter, const QRect & rect, const QBrush & brush)\fC [static]\fP"
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Wrapper for QPainter::fillRect()
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Definition at line 242 of file qwt_painter.cpp.
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References QwtMetricsMap::layoutToDevice().
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Referenced by drawRect().
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.SS "const \fBQwtMetricsMap\fP & QwtPainter::metricsMap ()\fC [static]\fP"
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Definition at line 161 of file qwt_painter.cpp.
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Referenced by QwtText::draw(), QwtSymbol::draw(), QwtLegendItem::drawIdentifier(), QwtLegendItem::drawItem(), QwtPlotCurve::drawSymbols(), QwtScaleDraw::drawTick(), QwtText::heightForWidth(), QwtPlot::print(), and QwtPlot::printScale().
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.SS "void QwtPainter::resetMetricsMap ()\fC [static]\fP"
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Reset the metrics map to the ratio 1:1
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\fBQwtPainter::setMetricsMap\fP, \fBQwtPainter::resetMetricsMap\fP
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Definition at line 153 of file qwt_painter.cpp.
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Referenced by QwtScaleDraw::drawTick().
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.SS "void QwtPainter::setClipRect (QPainter * painter, const QRect & rect)\fC [static]\fP"
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Wrapper for QPainter::setClipRect()
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Definition at line 169 of file qwt_painter.cpp.
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References QwtMetricsMap::layoutToDevice().
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Referenced by drawColorBar(), and QwtPlot::printLegend().
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.SS "void QwtPainter::setDeviceClipping (bool enable)\fC [static]\fP"
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En/Disable device clipping.
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On X11 the default for device clipping is enabled, otherwise it is disabled.
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\fBQwtPainter::deviceClipping()\fP
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Definition at line 62 of file qwt_painter.cpp.
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.SS "void QwtPainter::setMetricsMap (const \fBQwtMetricsMap\fP & map)\fC [static]\fP"
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Change the metrics map
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\fBQwtPainter::resetMetricsMap\fP, \fBQwtPainter::metricsMap\fP
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Definition at line 144 of file qwt_painter.cpp.
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.SS "void QwtPainter::setMetricsMap (const QPaintDevice * layout, const QPaintDevice * device)\fC [static]\fP"
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Scale all \fBQwtPainter\fP drawing operations using the ratio QwtPaintMetrics(from).logicalDpiX() / QwtPaintMetrics(to).logicalDpiX() and QwtPaintMetrics(from).logicalDpiY() / QwtPaintMetrics(to).logicalDpiY()
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QwtPainter::resetScaleMetrics(), QwtPainter::scaleMetricsX, QwtPainter::scaleMetricsY()
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Definition at line 134 of file qwt_painter.cpp.
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References QwtMetricsMap::setMetrics().
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Referenced by QwtPlot::print().
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