QwtPainter Class Reference

Collaboration diagram for QwtPainter:

[legend]List of all members.

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Detailed Description

A collection of QPainter workarounds.

1) Clipping to coordinate system limits (Qt3 only)

On X11 pixel coordinates are stored in shorts. Qt produces overruns when mapping QCOORDS to shorts.

2) Scaling to device metrics

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, QwtPainter adds scaling of these geometries. (Unfortunately QPainter::scale scales both types of paintings, so the objects of the first type would be scaled twice).

Definition at line 62 of file qwt_painter.h.

Static Public Member Functions
static void	setMetricsMap (const QPaintDevice *layout, const QPaintDevice *device)
static void	setMetricsMap (const QwtMetricsMap &)
static void	resetMetricsMap ()
static const QwtMetricsMap &	metricsMap ()
static void	setDeviceClipping (bool)
static bool	deviceClipping ()
static void	setClipRect (QPainter *, const QRect &)
static void	drawText (QPainter *, int x, int y, const QString &)
static void	drawText (QPainter *, const QPoint &, const QString &)
static void	drawText (QPainter *, int x, int y, int w, int h, int flags, const QString &)
static void	drawText (QPainter *, const QRect &, int flags, const QString &)
static void	drawSimpleRichText (QPainter *, const QRect &, int flags, QTextDocument &)
static void	drawRect (QPainter *, int x, int y, int w, int h)
static void	drawRect (QPainter *, const QRect &rect)
static void	fillRect (QPainter *, const QRect &, const QBrush &)
static void	drawEllipse (QPainter *, const QRect &)
static void	drawPie (QPainter *, const QRect &r, int a, int alen)
static void	drawLine (QPainter *, int x1, int y1, int x2, int y2)
static void	drawLine (QPainter *, const QPoint &p1, const QPoint &p2)
static void	drawPolygon (QPainter *, const QwtPolygon &pa)
static void	drawPolyline (QPainter *, const QwtPolygon &pa)
static void	drawPoint (QPainter *, int x, int y)
static void	drawRoundFrame (QPainter *, const QRect &, int width, const QPalette &, bool sunken)
static void	drawFocusRect (QPainter *, QWidget *)
static void	drawFocusRect (QPainter *, QWidget *, const QRect &)
static QwtPolygon	clip (const QwtPolygon &)
static void	drawColorBar (QPainter *painter, const QwtColorMap &, const QwtDoubleInterval &, const QwtScaleMap &, Qt::Orientation, const QRect &)

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Member Function Documentation

QwtPolygon QwtPainter::clip (  const QwtPolygon &   )  [static]

Clip a point array. Definition at line 94 of file qwt_painter.cpp. References QwtRect::clip(). Referenced by drawPolygon(), and drawPolyline().

bool QwtPainter::deviceClipping (   )  [static]

Returns whether device clipping is enabled. On X11 the default is enabled, otherwise it is disabled. See also: QwtPainter::setDeviceClipping() Definition at line 72 of file qwt_painter.cpp.

void QwtPainter::drawEllipse (  QPainter *  painter, const QRect &  rect )  [static]

Wrapper for QPainter::drawEllipse() Definition at line 294 of file qwt_painter.cpp. References QwtMetricsMap::layoutToDevice(). Referenced by QwtSymbol::draw(), and QwtPicker::drawRubberBand().

void QwtPainter::drawLine (  QPainter *  , const QPoint &  p1, const QPoint &  p2 )  [inline, static]

Wrapper for QPainter::drawLine(). Definition at line 143 of file qwt_painter.h. References drawLine().

void QwtPainter::drawLine (  QPainter *  painter, int  x1, int  y1, int  x2, int  y2 )  [static]

Wrapper for QPainter::drawLine() Definition at line 437 of file qwt_painter.cpp. References drawPolyline(), and QwtMetricsMap::isIdentity(). Referenced by QwtSymbol::draw(), QwtPlotMarker::draw(), QwtScaleDraw::drawBackbone(), QwtPlotSpectrogram::drawContourLines(), QwtLegendItem::drawIdentifier(), drawLine(), QwtPicker::drawRubberBand(), QwtPlotCurve::drawSticks(), and QwtRoundScaleDraw::drawTick().

void QwtPainter::drawPie (  QPainter *  painter, const QRect &  rect, int  a, int  alen )  [static]

Wrapper for QPainter::drawPie() Definition at line 279 of file qwt_painter.cpp. References QwtMetricsMap::layoutToDevice().

void QwtPainter::drawPoint (  QPainter *  painter, int  x, int  y )  [static]

Wrapper for QPainter::drawPoint() Definition at line 518 of file qwt_painter.cpp. References QwtMetricsMap::layoutToDevice(). Referenced by QwtPlotCurve::drawDots().

void QwtPainter::drawPolygon (  QPainter *  painter, const QwtPolygon &  pa )  [static]

Wrapper for QPainter::drawPolygon() Definition at line 487 of file qwt_painter.cpp. References clip(), and QwtMetricsMap::layoutToDevice(). Referenced by QwtSymbol::draw(), and QwtPlotCurve::fillCurve().

void QwtPainter::drawPolyline (  QPainter *  painter, const QwtPolygon &  pa )  [static]

Wrapper for QPainter::drawPolyline() Definition at line 504 of file qwt_painter.cpp. References clip(), and QwtMetricsMap::layoutToDevice(). Referenced by drawLine(), and drawRect().

void QwtPainter::drawRect (  QPainter *  painter, const QRect &  rect )  [static]

Wrapper for QPainter::drawRect() Definition at line 184 of file qwt_painter.cpp. References drawPolyline(), fillRect(), and QwtMetricsMap::layoutToDevice().

void QwtPainter::drawRect (  QPainter *  painter, int  x, int  y, int  w, int  h )  [static]

Wrapper for QPainter::drawRect() Definition at line 176 of file qwt_painter.cpp. Referenced by QwtText::draw(), QwtSymbol::draw(), drawColorBar(), and QwtPicker::drawRubberBand().

void QwtPainter::drawRoundFrame (  QPainter *  , const QRect &  , int  width, const QPalette &  , bool  sunken )  [static]

Draw a round frame. Definition at line 592 of file qwt_painter.cpp. Referenced by QwtDial::drawFrame().

void QwtPainter::drawSimpleRichText (  QPainter *  painter, const QRect &  rect, int  flags, QTextDocument &  text )  [static]

Wrapper for QSimpleRichText::draw() Definition at line 404 of file qwt_painter.cpp. References QwtMetricsMap::layoutToDevice(). Referenced by QwtRichTextEngine::draw().

void QwtPainter::drawText (  QPainter *  painter, const QRect &  rect, int  flags, const QString &  text )  [static]

Wrapper for QPainter::drawText() Definition at line 357 of file qwt_painter.cpp. References QwtMetricsMap::layoutToDevice().

void QwtPainter::drawText (  QPainter *  painter, int  x, int  y, int  w, int  h, int  flags, const QString &  text )  [static]

Wrapper for QPainter::drawText() Definition at line 348 of file qwt_painter.cpp. References drawText().

void QwtPainter::drawText (  QPainter *  painter, const QPoint &  pos, const QString &  text )  [static]

Wrapper for QPainter::drawText() Definition at line 332 of file qwt_painter.cpp. References QwtMetricsMap::layoutToDevice().

void QwtPainter::drawText (  QPainter *  painter, int  x, int  y, const QString &  text )  [static]

Wrapper for QPainter::drawText() Definition at line 323 of file qwt_painter.cpp. Referenced by QwtPlainTextEngine::draw(), and drawText().

void QwtPainter::fillRect (  QPainter *  painter, const QRect &  rect, const QBrush &  brush )  [static]

Wrapper for QPainter::fillRect() Definition at line 241 of file qwt_painter.cpp. References QwtMetricsMap::layoutToDevice(). Referenced by drawRect().

const QwtMetricsMap & QwtPainter::metricsMap (   )  [static]

Returns: Metrics map Definition at line 160 of file qwt_painter.cpp. Referenced by QwtText::draw(), QwtSymbol::draw(), QwtLegendItem::drawIdentifier(), QwtLegendItem::drawItem(), QwtPlotCurve::drawSymbols(), QwtScaleDraw::drawTick(), QwtText::heightForWidth(), QwtPlot::print(), and QwtPlot::printScale().

void QwtPainter::resetMetricsMap (   )  [static]

Reset the metrics map to the ratio 1:1 See also: QwtPainter::setMetricsMap, QwtPainter::resetMetricsMap Definition at line 152 of file qwt_painter.cpp. Referenced by QwtScaleDraw::drawTick().

void QwtPainter::setClipRect (  QPainter *  painter, const QRect &  rect )  [static]

Wrapper for QPainter::setClipRect() Definition at line 168 of file qwt_painter.cpp. References QwtMetricsMap::layoutToDevice(). Referenced by drawColorBar(), and QwtPlot::printLegend().

void QwtPainter::setDeviceClipping (  bool  enable  )  [static]

En/Disable device clipping. On X11 the default for device clipping is enabled, otherwise it is disabled. See also: QwtPainter::deviceClipping() Definition at line 61 of file qwt_painter.cpp.

void QwtPainter::setMetricsMap (  const QwtMetricsMap &  map  )  [static]

Change the metrics map See also: QwtPainter::resetMetricsMap, QwtPainter::metricsMap Definition at line 143 of file qwt_painter.cpp.

void QwtPainter::setMetricsMap (  const QPaintDevice *  layout, const QPaintDevice *  device )  [static]

Scale all QwtPainter drawing operations using the ratio QwtPaintMetrics(from).logicalDpiX() / QwtPaintMetrics(to).logicalDpiX() and QwtPaintMetrics(from).logicalDpiY() / QwtPaintMetrics(to).logicalDpiY() See also: QwtPainter::resetScaleMetrics(), QwtPainter::scaleMetricsX, QwtPainter::scaleMetricsY() Definition at line 133 of file qwt_painter.cpp. References QwtMetricsMap::setMetrics(). Referenced by QwtPlot::print().

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