qwtpainter.3

This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in

.TH "QwtPainter" 3 "4 Nov 2003" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtPainter \- 
.SH SYNOPSIS
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.PP
.SH "Detailed Description"
.PP 
A collection of QPainter workarounds. 

1) Clipping to coordinate system limits
.PP
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
.PP
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).
.PP
3) Hide some Qt2/3 incompatibilities 
.PP
.SS "Static Public Member Functions"

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.RI "void \fBsetMetricsMap\fP (const  QPaintDevice *layout, const  QPaintDevice *device)"
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.RI "void \fBsetMetricsMap\fP (const  QwtMetricsMap &)"
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.RI "void \fBresetMetricsMap\fP ()"
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.RI "const  QwtMetricsMap & \fBmetricsMap\fP ()"
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.RI "void \fBsetDeviceClipping\fP (bool)"
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.RI "bool \fBdeviceClipping\fP ()"
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.RI "void \fBsetClipRect\fP (QPainter *, const  QRect &)"
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.RI "void \fBdrawText\fP (QPainter *, int x, int y, const  QString &, int len=-1)"
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.RI "void \fBdrawText\fP (QPainter *, const  QPoint &, const  QString &, int len=-1)"
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.RI "void \fBdrawText\fP (QPainter *, int x, int y, int w, int h, int flags, const  QString &, int len=-1)"
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.RI "void \fBdrawText\fP (QPainter *, const  QRect &, int flags, const  QString &, int len=-1)"
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.RI "void \fBdrawSimpleRichText\fP (QPainter *, const  QRect &, int flags, QSimpleRichText &)"
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.RI "void \fBdrawRect\fP (QPainter *, int x, int y, int w, int h)"
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.RI "void \fBdrawRect\fP (QPainter *, const  QRect &rect)"
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.RI "void \fBfillRect\fP (QPainter *, const  QRect &, const  QBrush &)"
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.RI "void \fBdrawEllipse\fP (QPainter *, const  QRect &)"
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.RI "void \fBdrawLine\fP (QPainter *, int x1, int y1, int x2, int y2)"
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.RI "void \fBdrawLine\fP (QPainter *, const  QPoint &p1, const  QPoint &p2)"
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.RI "void \fBdrawPolygon\fP (QPainter *, const  QPointArray &pa)"
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.RI "void \fBdrawPolyline\fP (QPainter *, const  QPointArray &pa)"
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.RI "void \fBdrawPoint\fP (QPainter *, int x, int y)"
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.RI "void \fBdrawRoundFrame\fP (QPainter *, const  QRect &, int width, const  QColorGroup &cg, bool sunken)"
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.RI "QPointArray \fBclip\fP (const  QPointArray &)"
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.SH "Member Function Documentation"
.PP 
.SS "bool QwtPainter::deviceClipping ()\fC [static]\fP"
.PP
Returns whether device clipping is enabled. On X11 the default is enabled, otherwise it is disabled. 
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\fBSee also:\fP
.RS 4
\fBQwtPainter::setDeviceClipping()\fP 
.RE
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.SS "void QwtPainter::drawEllipse (QPainter * painter, const QRect & rect)\fC [static]\fP"
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Wrapper for QPainter::drawEllipse() 
.SS "void QwtPainter::drawLine (QPainter * painter, const QPoint & p1, const QPoint & p2)\fC [static]\fP"
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Wrapper for QPainter::drawLine() 
.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() 
.SS "void QwtPainter::drawPoint (QPainter * painter, int x, int y)\fC [static]\fP"
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Wrapper for QPainter::drawPoint() 
.SS "void QwtPainter::drawPolygon (QPainter * painter, const QPointArray & pa)\fC [static]\fP"
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Wrapper for QPainter::drawPolygon() 
.SS "void QwtPainter::drawPolyline (QPainter * painter, const QPointArray & pa)\fC [static]\fP"
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Wrapper for QPainter::drawPolyline() 
.SS "void QwtPainter::drawRect (QPainter * painter, const QRect & rect)\fC [static]\fP"
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Wrapper for QPainter::drawRect() 
.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() 
.SS "void QwtPainter::drawText (QPainter * painter, const QRect & rect, int flags, const QString & text, int len = -1)\fC [static]\fP"
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Wrapper for QPainter::drawText() 
.SS "void QwtPainter::drawText (QPainter * painter, int x, int y, int w, int h, int flags, const QString & text, int len = -1)\fC [static]\fP"
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Wrapper for QPainter::drawText() 
.SS "void QwtPainter::drawText (QPainter * painter, const QPoint & pos, const QString & text, int len = -1)\fC [static]\fP"
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Wrapper for QPainter::drawText() 
.SS "void QwtPainter::drawText (QPainter * painter, int x, int y, const QString & text, int len = -1)\fC [static]\fP"
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Wrapper for QPainter::drawText() 
.SS "void QwtPainter::fillRect (QPainter * painter, const QRect & rect, const QBrush & brush)\fC [static]\fP"
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Wrapper for QPainter::fillRect() 
.SS "void QwtPainter::setClipRect (QPainter * painter, const QRect & rect)\fC [static]\fP"
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Wrapper for QPainter::setClipRect() 
.SS "void QwtPainter::setDeviceClipping (bool enable)\fC [static]\fP"
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En/Disable device clipping. On X11 the default for device clipping is enabled, otherwise it is disabled. 
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\fBSee also:\fP
.RS 4
\fBQwtPainter::deviceClipping()\fP 
.RE
.PP

.SS "void QwtPainter::setMetricsMap (const QPaintDevice * layout, const QPaintDevice * device)\fC [static]\fP"
.PP
Scale all QwtPainter drawing operations using the ratio QwtPaintMetrics(from).logicalDpiX() / QwtPaintMetrics(to).logicalDpiX() and QwtPaintMetrics(from).logicalDpiY() / QwtPaintMetrics(to).logicalDpiY()
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\fBSee also:\fP
.RS 4
QwtPainter::resetScaleMetrics(), QwtPainter::scaleMetricsX, QwtPainter::scaleMetricsY() 
.RE
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.SH "Author"
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Generated automatically by Doxygen for Qwt User's Guide from the source code.