.TH "QwtNullPaintDevice" 3 "Fri Apr 15 2011" "Version 6.0.0" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtNullPaintDevice \- 
.PP
A null paint device doing nothing.  

.SH SYNOPSIS
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.PP
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\fC#include <qwt_null_paintdevice.h>\fP
.PP
Inherited by QwtStyleSheetRecorder.
.SS "Public Member Functions"

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.RI "\fBQwtNullPaintDevice\fP (QPaintEngine::PaintEngineFeatures)"
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.RI "\fBQwtNullPaintDevice\fP (const QSize &size, QPaintEngine::PaintEngineFeatures)"
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.RI "virtual \fB~QwtNullPaintDevice\fP ()"
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.RI "void \fBsetSize\fP (const QSize &)"
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.RI "QSize \fBsize\fP () const "
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.RI "virtual QPaintEngine * \fBpaintEngine\fP () const "
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.RI "virtual int \fBmetric\fP (PaintDeviceMetric metric) const "
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.RI "virtual void \fBdrawRects\fP (const QRect *, int)"
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.RI "virtual void \fBdrawRects\fP (const QRectF *, int)"
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.RI "virtual void \fBdrawLines\fP (const QLine *, int)"
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.RI "virtual void \fBdrawLines\fP (const QLineF *, int)"
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.RI "virtual void \fBdrawEllipse\fP (const QRectF &)"
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.RI "virtual void \fBdrawEllipse\fP (const QRect &)"
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.RI "virtual void \fBdrawPath\fP (const QPainterPath &)"
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.RI "virtual void \fBdrawPoints\fP (const QPointF *, int)"
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.RI "virtual void \fBdrawPoints\fP (const QPoint *, int)"
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.RI "virtual void \fBdrawPolygon\fP (const QPointF *, int, QPaintEngine::PolygonDrawMode)"
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.RI "virtual void \fBdrawPolygon\fP (const QPoint *, int, QPaintEngine::PolygonDrawMode)"
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.RI "virtual void \fBdrawPixmap\fP (const QRectF &, const QPixmap &, const QRectF &)"
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.RI "virtual void \fBdrawTextItem\fP (const QPointF &, const QTextItem &)"
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.RI "virtual void \fBdrawTiledPixmap\fP (const QRectF &, const QPixmap &, const QPointF &s)"
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.RI "virtual void \fBdrawImage\fP (const QRectF &, const QImage &, const QRectF &, Qt::ImageConversionFlags)"
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.RI "virtual void \fBupdateState\fP (const QPaintEngineState &state)"
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.SH "Detailed Description"
.PP 
A null paint device doing nothing. 

Sometimes important layout/rendering geometries are not available or changable from the public Qt class interface. ( f.e hidden in the style implementation ).
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\fBQwtNullPaintDevice\fP can be used to manipulate or filter out these informations by analyzing the stream of paint primitives.
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F.e. \fBQwtNullPaintDevice\fP is used by \fBQwtPlotCanvas\fP to identify styled backgrounds with rounded corners. 
.SH "Constructor & Destructor Documentation"
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.SS "QwtNullPaintDevice::QwtNullPaintDevice (QPaintEngine::PaintEngineFeaturesfeatures)"
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Constructor. 
.SS "QwtNullPaintDevice::QwtNullPaintDevice (const QSize &size, QPaintEngine::PaintEngineFeaturesfeatures)"
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Constructor. 
.SS "QwtNullPaintDevice::~QwtNullPaintDevice ()\fC [virtual]\fP"
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Destructor. 
.SH "Member Function Documentation"
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.SS "void QwtNullPaintDevice::drawEllipse (const QRectF &rect)\fC [virtual]\fP"
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See QPaintEngine::drawEllipse() 
.SS "void QwtNullPaintDevice::drawEllipse (const QRect &rect)\fC [virtual]\fP"
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See QPaintEngine::drawEllipse() 
.SS "void QwtNullPaintDevice::drawImage (const QRectF &rect, const QImage &image, const QRectF &subRect, Qt::ImageConversionFlagsflags)\fC [virtual]\fP"
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See QPaintEngine::drawImage() 
.SS "void QwtNullPaintDevice::drawLines (const QLineF *lines, intlineCount)\fC [virtual]\fP"
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See QPaintEngine::drawLines() 
.SS "void QwtNullPaintDevice::drawLines (const QLine *lines, intlineCount)\fC [virtual]\fP"
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See QPaintEngine::drawLines() 
.SS "void QwtNullPaintDevice::drawPath (const QPainterPath &path)\fC [virtual]\fP"
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See QPaintEngine::drawPath() 
.SS "void QwtNullPaintDevice::drawPixmap (const QRectF &rect, const QPixmap &pm, const QRectF &subRect)\fC [virtual]\fP"
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See QPaintEngine::drawPixmap() 
.SS "void QwtNullPaintDevice::drawPoints (const QPointF *points, intpointCount)\fC [virtual]\fP"
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See QPaintEngine::drawPoints() 
.SS "void QwtNullPaintDevice::drawPoints (const QPoint *points, intpointCount)\fC [virtual]\fP"
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See QPaintEngine::drawPoints() 
.SS "void QwtNullPaintDevice::drawPolygon (const QPoint *points, intpointCount, QPaintEngine::PolygonDrawModemode)\fC [virtual]\fP"
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See QPaintEngine::drawPolygon() 
.SS "void QwtNullPaintDevice::drawPolygon (const QPointF *points, intpointCount, QPaintEngine::PolygonDrawModemode)\fC [virtual]\fP"
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See QPaintEngine::drawPolygon() 
.SS "void QwtNullPaintDevice::drawRects (const QRectF *rects, intrectCount)\fC [virtual]\fP"
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See QPaintEngine::drawRects() 
.SS "void QwtNullPaintDevice::drawRects (const QRect *rects, intrectCount)\fC [virtual]\fP"
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See QPaintEngine::drawRects() 
.SS "void QwtNullPaintDevice::drawTextItem (const QPointF &pos, const QTextItem &textItem)\fC [virtual]\fP"
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See QPaintEngine::drawTextItem() 
.SS "void QwtNullPaintDevice::drawTiledPixmap (const QRectF &rect, const QPixmap &pixmap, const QPointF &s)\fC [virtual]\fP"
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See QPaintEngine::drawTiledPixmap() 
.SS "int QwtNullPaintDevice::metric (PaintDeviceMetricmetric) const\fC [virtual]\fP"See QPaintDevice::metric() 
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\fBSee also:\fP
.RS 4
\fBsetSize()\fP 
.RE
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.SS "QPaintEngine * QwtNullPaintDevice::paintEngine () const\fC [virtual]\fP"
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See QPaintDevice::paintEngine() 
.SS "void QwtNullPaintDevice::setSize (const QSize &size)"Set the size of the paint device
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\fBParameters:\fP
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\fIsize\fP Size 
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\fBSee also:\fP
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\fBsize()\fP 
.RE
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.SS "QSize QwtNullPaintDevice::size () const"\fBReturns:\fP
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Size of the paint device 
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\fBSee also:\fP
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\fBsetSize()\fP 
.RE
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.SS "void QwtNullPaintDevice::updateState (const QPaintEngineState &state)\fC [virtual]\fP"
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See QPaintEngine::updateState() 

.SH "Author"
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