.TH "QwtMetricsMap" 3 "Mon Aug 1 2011" "Version 5.2.2" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtMetricsMap \- 
.PP
A Map to translate between layout, screen and paint device metrics.  

.SH SYNOPSIS
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.PP
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\fC#include <qwt_layout_metrics.h>\fP
.SS "Public Member Functions"

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.RI "QPoint \fBdeviceToLayout\fP (const QPoint &, const QPainter *=NULL) const "
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.RI "QSize \fBdeviceToLayout\fP (const QSize &) const "
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.RI "QRect \fBdeviceToLayout\fP (const QRect &, const QPainter *=NULL) const "
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.RI "QwtPolygon \fBdeviceToLayout\fP (const QwtPolygon &, const QPainter *=NULL) const "
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.RI "int \fBdeviceToLayoutX\fP (int x) const "
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.RI "int \fBdeviceToLayoutY\fP (int y) const "
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.RI "bool \fBisIdentity\fP () const "
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.RI "QSize \fBlayoutToDevice\fP (const QSize &) const "
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.RI "QwtPolygon \fBlayoutToDevice\fP (const QwtPolygon &, const QPainter *=NULL) const "
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.RI "QRect \fBlayoutToDevice\fP (const QRect &, const QPainter *=NULL) const "
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.RI "QPoint \fBlayoutToDevice\fP (const QPoint &, const QPainter *=NULL) const "
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.RI "int \fBlayoutToDeviceX\fP (int x) const "
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.RI "int \fBlayoutToDeviceY\fP (int y) const "
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.RI "QSize \fBlayoutToScreen\fP (const QSize &) const "
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.RI "QRect \fBlayoutToScreen\fP (const QRect &) const "
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.RI "QPoint \fBlayoutToScreen\fP (const QPoint &point) const "
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.RI "int \fBlayoutToScreenX\fP (int x) const "
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.RI "int \fBlayoutToScreenY\fP (int y) const "
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.RI "QPoint \fBscreenToLayout\fP (const QPoint &) const "
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.RI "QRect \fBscreenToLayout\fP (const QRect &) const "
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.RI "QSize \fBscreenToLayout\fP (const QSize &) const "
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.RI "int \fBscreenToLayoutX\fP (int x) const "
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.RI "int \fBscreenToLayoutY\fP (int y) const "
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.RI "void \fBsetMetrics\fP (const QPaintDevice *layoutMetrics, const QPaintDevice *deviceMetrics)"
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.SS "Static Public Member Functions"

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.RI "static QwtPolygon \fBtranslate\fP (const QMatrix &, const QwtPolygon &)"
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.RI "static QRect \fBtranslate\fP (const QMatrix &, const QRect &)"
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.SH "Detailed Description"
.PP 
A Map to translate between layout, screen and paint device metrics. 

Qt3 supports painting in integer coordinates only. Therefore it is not possible to scale the layout in screen coordinates to layouts in higher resolutions ( f.e printing ) without losing the higher precision. \fBQwtMetricsMap\fP is used to incorporate the various widget attributes ( always in screen resolution ) into the layout/printing code of \fBQwtPlot\fP.
.PP
Qt4 is able to paint floating point based coordinates, what makes it possible always to render in screen coordinates ( with a common scale factor ). \fBQwtMetricsMap\fP will be obsolete as soon as Qt3 support has been dropped ( Qwt 6.x ). 
.SH "Member Function Documentation"
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.SS "QwtPolygon QwtMetricsMap::translate (const QMatrix &m, const QwtPolygon &pa)\fC [static]\fP"Wrapper for QMatrix::map.
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\fBParameters:\fP
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\fIm\fP Matrix 
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\fIpa\fP Polygon to translate 
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\fBReturns:\fP
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Translated polygon 
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.SS "QRect QwtMetricsMap::translate (const QMatrix &m, const QRect &rect)\fC [static]\fP"Wrapper for QMatrix::mapRect.
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\fBParameters:\fP
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\fIm\fP Matrix 
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\fIrect\fP Rectangle to translate 
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\fBReturns:\fP
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Translated rectangle 
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.SH "Author"
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