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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Qwt User's Guide: qwt_painter.cpp Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.6 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="classes.html"><span>Classes</span></a></li> <li id="current"><a href="files.html"><span>Files</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> </ul></div><h1>qwt_painter.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span><a name="l00002"></a>00002 <span class="comment"> * Qwt Widget Library</span><a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 1997 Josef Wilgen</span><a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2002 Uwe Rathmann</span><a name="l00005"></a>00005 <span class="comment"> *</span><a name="l00006"></a>00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span><a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span><a name="l00008"></a>00008 <span class="comment"> *****************************************************************************/</span><a name="l00009"></a>00009 <a name="l00010"></a>00010 <span class="comment">// vim: expandtab</span><a name="l00011"></a>00011 <a name="l00012"></a>00012 <span class="preprocessor">#include <qwindowdefs.h></span><a name="l00013"></a>00013 <span class="preprocessor">#include <qwidget.h></span><a name="l00014"></a>00014 <span class="preprocessor">#include <qrect.h></span><a name="l00015"></a>00015 <span class="preprocessor">#include <qpainter.h></span><a name="l00016"></a>00016 <span class="preprocessor">#include <qpalette.h></span><a name="l00017"></a>00017 <span class="preprocessor">#include <qpaintdevice.h></span><a name="l00018"></a>00018 <span class="preprocessor">#include <qpixmap.h></span><a name="l00019"></a>00019 <span class="preprocessor">#include <qstyle.h></span><a name="l00020"></a>00020 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#include <qsimplerichtext.h></span><a name="l00022"></a>00022 <span class="preprocessor">#else</span><a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#include <qtextdocument.h></span><a name="l00024"></a>00024 <span class="preprocessor">#include <qabstracttextdocumentlayout.h></span><a name="l00025"></a>00025 <span class="preprocessor">#include <qstyleoption.h></span><a name="l00026"></a>00026 <span class="preprocessor">#endif</span><a name="l00027"></a>00027 <span class="preprocessor"></span><a name="l00028"></a>00028 <span class="preprocessor">#include "qwt_rect.h"</span><a name="l00029"></a>00029 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00030"></a>00030 <span class="preprocessor">#include "qwt_color_map.h"</span><a name="l00031"></a>00031 <span class="preprocessor">#include "qwt_scale_map.h"</span><a name="l00032"></a>00032 <span class="preprocessor">#include "qwt_painter.h"</span><a name="l00033"></a>00033 <a name="l00034"></a>00034 <a class="code" href="class_qwt_metrics_map.html">QwtMetricsMap</a> QwtPainter::d_metricsMap;<a name="l00035"></a>00035 <a name="l00036"></a>00036 <span class="preprocessor">#if defined(Q_WS_X11)</span><a name="l00037"></a>00037 <span class="preprocessor"></span><span class="keywordtype">bool</span> QwtPainter::d_deviceClipping = <span class="keyword">true</span>;<a name="l00038"></a>00038 <span class="preprocessor">#else</span><a name="l00039"></a>00039 <span class="preprocessor"></span><span class="keywordtype">bool</span> QwtPainter::d_deviceClipping = <span class="keyword">false</span>;<a name="l00040"></a>00040 <span class="preprocessor">#endif</span><a name="l00041"></a>00041 <span class="preprocessor"></span><a name="l00042"></a>00042 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00043"></a>00043 <span class="preprocessor"></span><span class="keywordtype">bool</span> QwtPainter::d_SVGMode = <span class="keyword">false</span>;<a name="l00044"></a>00044 <span class="preprocessor">#endif</span><a name="l00045"></a>00045 <span class="preprocessor"></span><a name="l00046"></a>00046 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> needDeviceClipping(<a name="l00047"></a>00047 <span class="keyword">const</span> QPainter *painter, <span class="keywordtype">bool</span> deviceClipping)<a name="l00048"></a>00048 {<a name="l00049"></a>00049 <span class="keywordflow">return</span> deviceClipping && <a name="l00050"></a>00050 (painter->device()->devType() == QInternal::Widget ||<a name="l00051"></a>00051 painter->device()->devType() == QInternal::Pixmap );<a name="l00052"></a>00052 }<a name="l00053"></a>00053 <a name="l00061"></a><a class="code" href="class_qwt_painter.html#97362eaf7ae87354b4145a8d05b29ea1">00061</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#97362eaf7ae87354b4145a8d05b29ea1">QwtPainter::setDeviceClipping</a>(<span class="keywordtype">bool</span> enable)<a name="l00062"></a>00062 {<a name="l00063"></a>00063 d_deviceClipping = enable;<a name="l00064"></a>00064 }<a name="l00065"></a>00065 <a name="l00072"></a><a class="code" href="class_qwt_painter.html#0d4b0e0cb454143e9951a951d1cb0600">00072</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_painter.html#0d4b0e0cb454143e9951a951d1cb0600">QwtPainter::deviceClipping</a>()<a name="l00073"></a>00073 {<a name="l00074"></a>00074 <span class="keywordflow">return</span> d_deviceClipping;<a name="l00075"></a>00075 }<a name="l00076"></a>00076 <a name="l00081"></a>00081 <span class="keyword">const</span> QRect &QwtPainter::deviceClipRect()<a name="l00082"></a>00082 {<a name="l00083"></a>00083 <span class="keyword">static</span> QRect <a class="code" href="class_qwt_painter.html#241e86dde3636d8e25acc40a135dd054">clip</a>;<a name="l00084"></a>00084 <a name="l00085"></a>00085 <span class="keywordflow">if</span> ( !clip.isValid() )<a name="l00086"></a>00086 {<a name="l00087"></a>00087 clip.setCoords(QWT_COORD_MIN, QWT_COORD_MIN,<a name="l00088"></a>00088 QWT_COORD_MAX, QWT_COORD_MAX);<a name="l00089"></a>00089 }<a name="l00090"></a>00090 <span class="keywordflow">return</span> clip;<a name="l00091"></a>00091 }<a name="l00092"></a>00092 <a name="l00094"></a><a class="code" href="class_qwt_painter.html#241e86dde3636d8e25acc40a135dd054">00094</a> QwtPolygon <a class="code" href="class_qwt_painter.html#241e86dde3636d8e25acc40a135dd054">QwtPainter::clip</a>(<span class="keyword">const</span> QwtPolygon &pa)<a name="l00095"></a>00095 {<a name="l00096"></a>00096 <span class="keyword">const</span> <a class="code" href="class_qwt_rect.html">QwtRect</a> rect(deviceClipRect());<a name="l00097"></a>00097 <span class="keywordflow">return</span> rect.<a class="code" href="class_qwt_rect.html#89bfabf3416a3b535451a83e91a12d13">clip</a>(pa);<a name="l00098"></a>00098 }<a name="l00099"></a>00099 <a name="l00100"></a>00100 <span class="preprocessor">#if QT_VERSION < 0x040000 </span><a name="l00101"></a>00101 <span class="preprocessor"></span><a name="l00113"></a>00113 <span class="keywordtype">void</span> QwtPainter::setSVGMode(<span class="keywordtype">bool</span> on)<a name="l00114"></a>00114 {<a name="l00115"></a>00115 d_SVGMode = on;<a name="l00116"></a>00116 }<a name="l00117"></a>00117 <a name="l00118"></a>00118 <span class="keywordtype">bool</span> QwtPainter::isSVGMode()<a name="l00119"></a>00119 {<a name="l00120"></a>00120 <span class="keywordflow">return</span> d_SVGMode;<a name="l00121"></a>00121 }<a name="l00122"></a>00122 <a name="l00123"></a>00123 <span class="preprocessor">#endif // QT_VERSION < 0x040000</span><a name="l00124"></a>00124 <span class="preprocessor"></span><a name="l00133"></a><a class="code" href="class_qwt_painter.html#952553514abb7ab83c4a43602c899777">00133</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#952553514abb7ab83c4a43602c899777">QwtPainter::setMetricsMap</a>(<span class="keyword">const</span> QPaintDevice *layout,<a name="l00134"></a>00134 <span class="keyword">const</span> QPaintDevice *device)<a name="l00135"></a>00135 {<a name="l00136"></a>00136 d_metricsMap.<a class="code" href="class_qwt_metrics_map.html#5890baf34ffa9e2bcd18f5e559821ad0">setMetrics</a>(layout, device);<a name="l00137"></a>00137 }<a name="l00138"></a>00138 <a name="l00143"></a><a class="code" href="class_qwt_painter.html#8ddc7ad5f7544ee42e9014eebb7b7bcc">00143</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#952553514abb7ab83c4a43602c899777">QwtPainter::setMetricsMap</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_metrics_map.html">QwtMetricsMap</a> &map)<a name="l00144"></a>00144 {<a name="l00145"></a>00145 d_metricsMap = map;<a name="l00146"></a>00146 }<a name="l00147"></a>00147 <a name="l00152"></a><a class="code" href="class_qwt_painter.html#0a20214cff4c8edd4c3caa0ad3a2112f">00152</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#0a20214cff4c8edd4c3caa0ad3a2112f">QwtPainter::resetMetricsMap</a>()<a name="l00153"></a>00153 {<a name="l00154"></a>00154 d_metricsMap = <a class="code" href="class_qwt_metrics_map.html">QwtMetricsMap</a>();<a name="l00155"></a>00155 }<a name="l00156"></a>00156 <a name="l00160"></a><a class="code" href="class_qwt_painter.html#3de95bfc83c9beee537404b41749bad5">00160</a> <span class="keyword">const</span> <a class="code" href="class_qwt_metrics_map.html">QwtMetricsMap</a> &<a class="code" href="class_qwt_painter.html#3de95bfc83c9beee537404b41749bad5">QwtPainter::metricsMap</a>()<a name="l00161"></a>00161 {<a name="l00162"></a>00162 <span class="keywordflow">return</span> d_metricsMap;<a name="l00163"></a>00163 }<a name="l00164"></a>00164 <a name="l00168"></a><a class="code" href="class_qwt_painter.html#7a3b7e59fd56236dd99c5b1772e1a768">00168</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#7a3b7e59fd56236dd99c5b1772e1a768">QwtPainter::setClipRect</a>(QPainter *painter, <span class="keyword">const</span> QRect &rect)<a name="l00169"></a>00169 {<a name="l00170"></a>00170 painter->setClipRect(d_metricsMap.<a class="code" href="class_qwt_metrics_map.html#180736dad3afe26c2579f6fefcb9f2d9">layoutToDevice</a>(rect, painter));<a name="l00171"></a>00171 }<a name="l00172"></a>00172 <a name="l00176"></a><a class="code" href="class_qwt_painter.html#9d606b6a681b9e1d0e0823c8a169ac7e">00176</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#9d606b6a681b9e1d0e0823c8a169ac7e">QwtPainter::drawRect</a>(QPainter *painter, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">int</span> w, <span class="keywordtype">int</span> h) <a name="l00177"></a>00177 {<a name="l00178"></a>00178 <a class="code" href="class_qwt_painter.html#9d606b6a681b9e1d0e0823c8a169ac7e">drawRect</a>(painter, QRect(x, y, w, h));<a name="l00179"></a>00179 }<a name="l00180"></a>00180 <a name="l00184"></a><a class="code" href="class_qwt_painter.html#864e17670956e5c65dbe463eb945a23e">00184</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#9d606b6a681b9e1d0e0823c8a169ac7e">QwtPainter::drawRect</a>(QPainter *painter, <span class="keyword">const</span> QRect &rect) <a name="l00185"></a>00185 {<a name="l00186"></a>00186 QRect r = d_metricsMap.<a class="code" href="class_qwt_metrics_map.html#180736dad3afe26c2579f6fefcb9f2d9">layoutToDevice</a>(rect, painter);<a name="l00187"></a>00187 <a name="l00188"></a>00188 QRect clipRect;<a name="l00189"></a>00189 <a name="l00190"></a>00190 <span class="keyword">const</span> <span class="keywordtype">bool</span> deviceClipping = needDeviceClipping(painter, d_deviceClipping);<a name="l00191"></a>00191 <span class="keywordflow">if</span> ( deviceClipping )<a name="l00192"></a>00192 clipRect = deviceClipRect();<a name="l00193"></a>00193 <a name="l00194"></a>00194 <span class="keywordflow">if</span> ( clipRect.isValid() )<a name="l00195"></a>00195 {<a name="l00196"></a>00196 <span class="keywordflow">if</span> ( !clipRect.intersects(r) )<a name="l00197"></a>00197 <span class="keywordflow">return</span>;<a name="l00198"></a>00198 <a name="l00199"></a>00199 <span class="keywordflow">if</span> ( !clipRect.contains(r) )⌨️ 快捷键说明
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