Main Page | Class Hierarchy | Alphabetical List | Class List | Directories | File List | Class Members | File Members | Related Pages

QwtPainter Class Reference

Collaboration diagram for QwtPainter:

Collaboration graph
[legend]
List of all members.

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 58 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 QwtMetricsMapmetricsMap ()
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, QSimpleRichText &)
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 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 QPointArray &pa)
static void drawPolyline (QPainter *, const QPointArray &pa)
static void drawPoint (QPainter *, int x, int y)
static void drawRoundFrame (QPainter *, const QRect &, int width, const QColorGroup &cg, bool sunken)
static void drawFocusRect (QPainter *, QWidget *)
static void drawFocusRect (QPainter *, QWidget *, const QRect &)
static QPointArray clip (const QPointArray &)


Member Function Documentation

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 60 of file qwt_painter.cpp.

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

Wrapper for QPainter::drawEllipse()

Definition at line 241 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
[static]
 

Wrapper for QPainter::drawLine().

Definition at line 134 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 354 of file qwt_painter.cpp.

References QwtMetricsMap::isIdentity(), and QwtMetricsMap::layoutToDevice().

Referenced by QwtSymbol::draw(), QwtPlotMarker::draw(), QwtScaleDraw::drawBackbone(), QwtLegendItem::drawIdentifier(), drawLine(), QwtPicker::drawRubberBand(), QwtPlotCurve::drawSticks(), QwtScaleDraw::drawTick(), and QwtRoundScaleDraw::drawTick().

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

Wrapper for QPainter::drawPoint()

Definition at line 430 of file qwt_painter.cpp.

References QwtMetricsMap::layoutToDevice().

Referenced by QwtPlotCurve::drawDots().

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

Wrapper for QPainter::drawRect()

Definition at line 147 of file qwt_painter.cpp.

References 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 139 of file qwt_painter.cpp.

Referenced by QwtText::draw(), QwtSymbol::draw(), QwtPicker::drawRubberBand(), and QwtPlot::printCanvas().

void QwtPainter::drawRoundFrame QPainter *  ,
const QRect &  ,
int  width,
const QColorGroup &  cg,
bool  sunken
[static]
 

Draw a round frame.

Definition at line 499 of file qwt_painter.cpp.

Referenced by QwtDial::drawFrame().

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

Wrapper for QSimpleRichText::draw()

Definition at line 300 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 286 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 277 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 263 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 254 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 205 of file qwt_painter.cpp.

References QwtMetricsMap::layoutToDevice().

Referenced by drawRect().

const QwtMetricsMap & QwtPainter::metricsMap  )  [static]
 

Returns:
Metrics map

Definition at line 123 of file qwt_painter.cpp.

Referenced by QwtText::draw(), QwtSymbol::draw(), QwtPlotMarker::draw(), QwtLegendItem::drawIdentifier(), QwtLegendItem::drawItem(), QwtPlotCurve::drawSymbols(), QwtText::heightForWidth(), QwtPlot::print(), QwtPlot::printCanvas(), and QwtText::textSize().

void QwtPainter::resetMetricsMap  )  [static]
 

Reset the metrics map to the ratio 1:1

See also:
QwtPainter::setMetricsMap, QwtPainter::resetMetricsMap

Definition at line 115 of file qwt_painter.cpp.

Referenced by QwtPlot::print().

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

Wrapper for QPainter::setClipRect()

Definition at line 131 of file qwt_painter.cpp.

References QwtMetricsMap::layoutToDevice().

Referenced by QwtPlot::printCanvas(), 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 49 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 106 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 96 of file qwt_painter.cpp.

References QwtMetricsMap::setMetrics().

Referenced by QwtPlot::print().


Generated on Mon Jan 30 22:17:11 2006 for Qwt User's Guide by  doxygen 1.4.4