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<h1>qwt_paint_buffer.cpp</h1><a href="qwt__paint__buffer_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*-*- c++ -*-******************************************************************</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"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
<a name="l00006"></a>00006 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00007"></a>00007 <span class="comment"> * License as published by the Free Software Foundation; either</span>
<a name="l00008"></a>00008 <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * This library is distributed in the hope that it will be useful,</span>
<a name="l00011"></a>00011 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00012"></a>00012 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00013"></a>00013 <span class="comment"> * Lesser General Public License for more details.</span>
<a name="l00014"></a>00014 <span class="comment"> *</span>
<a name="l00015"></a>00015 <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span>
<a name="l00016"></a>00016 <span class="comment"> * License along with this library; if not, write to the Free Software</span>
<a name="l00017"></a>00017 <span class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00018"></a>00018 <span class="comment"> *****************************************************************************/</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#include <qwidget.h></span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="preprocessor">#if QT_VERSION < 0x040000</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="comment">//Added by the Qt porting tool:</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <QtGui/QPaintEngine></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <QtGui/QPixmap></span>
<a name="l00027"></a>00027 <span class="preprocessor">#endif</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <qpainter.h></span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="preprocessor">#include "<a class="code" href="qwt__paint__buffer_8h.html">qwt_paint_buffer.h</a>"</span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keyword">namespace </span>hippodraw {
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="preprocessor">#if QT_VERSION < 0x040000</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="keywordtype">bool</span> QwtPaintBuffer::d_enabled = TRUE;
<a name="l00037"></a>00037 <span class="preprocessor">#else</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="keywordtype">bool</span> QwtPaintBuffer::d_enabled = <span class="keyword">true</span>;
<a name="l00039"></a>00039 <span class="preprocessor">#endif</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span>
<a name="l00042"></a>00042 QwtPaintBuffer::QwtPaintBuffer():
<a name="l00043"></a>00043 d_device(0),
<a name="l00044"></a>00044 d_painter(0),
<a name="l00045"></a>00045 d_devicePainter(0)
<a name="l00046"></a>00046 {
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048
<a name="l00059"></a>00059 QwtPaintBuffer::QwtPaintBuffer(<a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpaintdevice.html">QPaintDevice</a> *device,
<a name="l00060"></a>00060 <span class="keyword">const</span> <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qrect.html">QRect</a> &rect, <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpainter.html">QPainter</a> *painter):
<a name="l00061"></a>00061 d_device(0),
<a name="l00062"></a>00062 d_painter(0),
<a name="l00063"></a>00063 d_devicePainter(0)
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 open(device, rect, painter);
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067
<a name="l00072"></a>00072 QwtPaintBuffer::~QwtPaintBuffer()
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 close();
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076
<a name="l00083"></a>00083 <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpainter.html">QPainter</a> *QwtPaintBuffer::painter()
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 <span class="keywordflow">return</span> d_painter;
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087
<a name="l00091"></a>00091 <span class="keyword">const</span> <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpaintdevice.html">QPaintDevice</a> *QwtPaintBuffer::device()
<a name="l00092"></a>00092 {
<a name="l00093"></a>00093 <span class="keywordflow">return</span> d_device;
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095
<a name="l00101"></a>00101 <span class="keywordtype">void</span> QwtPaintBuffer::setEnabled(<span class="keywordtype">bool</span> enable)
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 d_enabled = enable;
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105
<a name="l00109"></a>00109 <span class="keywordtype">bool</span> QwtPaintBuffer::isEnabled()
<a name="l00110"></a>00110 {
<a name="l00111"></a>00111 <span class="keywordflow">return</span> d_enabled;
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113
<a name="l00122"></a>00122 <span class="keywordtype">void</span> QwtPaintBuffer::open(<a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpaintdevice.html">QPaintDevice</a> *device,
<a name="l00123"></a>00123 <span class="keyword">const</span> <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qrect.html">QRect</a> &rect, <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpainter.html">QPainter</a> *painter)
<a name="l00124"></a>00124 {
<a name="l00125"></a>00125 close();
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="keywordflow">if</span> ( device == 0 || !rect.<a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qrect.html#isValid">isValid</a>() )
<a name="l00128"></a>00128 <span class="keywordflow">return</span>;
<a name="l00129"></a>00129
<a name="l00130"></a>00130 d_device = device;
<a name="l00131"></a>00131 d_devicePainter = painter;
<a name="l00132"></a>00132 d_rect = rect;
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="keywordflow">if</span> ( isEnabled() )
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 d_pixBuffer.resize(d_rect.size());
<a name="l00137"></a>00137
<a name="l00138"></a>00138 d_painter = <span class="keyword">new</span> <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpainter.html">QPainter</a>();
<a name="l00139"></a>00139 <span class="keywordflow">if</span> ( d_device->devType() == QInternal::Widget )
<a name="l00140"></a>00140 {
<a name="l00141"></a>00141 <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qwidget.html">QWidget</a> *w = (<a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qwidget.html">QWidget</a> *)d_device;
<a name="l00142"></a>00142 d_pixBuffer.fill(w, d_rect.topLeft());
<a name="l00143"></a>00143 d_painter->begin(&d_pixBuffer, w);
<a name="l00144"></a>00144 d_painter->translate(-d_rect.x(), -d_rect.y());
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146 <span class="keywordflow">else</span>
<a name="l00147"></a>00147 {
<a name="l00148"></a>00148 d_painter->begin(&d_pixBuffer);
<a name="l00149"></a>00149 }
<a name="l00150"></a>00150 }
<a name="l00151"></a>00151 <span class="keywordflow">else</span>
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 <span class="keywordflow">if</span> ( d_devicePainter )
<a name="l00154"></a>00154 d_painter = d_devicePainter;
<a name="l00155"></a>00155 <span class="keywordflow">else</span>
<a name="l00156"></a>00156 {
<a name="l00157"></a>00157 d_painter = <span class="keyword">new</span> <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpainter.html">QPainter</a>(d_device);
<a name="l00158"></a>00158
<a name="l00159"></a>00159 <span class="keywordflow">if</span> ( d_device->devType() == QInternal::Widget )
<a name="l00160"></a>00160 {
<a name="l00161"></a>00161 <span class="preprocessor">#if QT_VERSION < 0x040000</span>
<a name="l00162"></a>00162 <span class="preprocessor"></span> <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qwidget.html">QWidget</a> *w = (<a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qwidget.html">QWidget</a> *)d_device;
<a name="l00163"></a>00163 <span class="keywordflow">if</span> ( w-><a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qwidget.html#testWFlags">testWFlags</a>( Qt::WRepaintNoErase | Qt::WResizeNoErase) )
<a name="l00164"></a>00164 <span class="comment">// #else</span>
<a name="l00165"></a>00165 <span class="comment">// if ( w->testWFlags( Qt::WNoAutoErase | Qt::WResizeNoErase) )</span>
<a name="l00166"></a>00166 #endif
<a name="l00167"></a>00167 d_painter->eraseRect(d_rect);
<a name="l00168"></a>00168 }
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170 }
<a name="l00171"></a>00171 }
<a name="l00172"></a>00172
<a name="l00176"></a>00176 <span class="keywordtype">void</span> QwtPaintBuffer::flush()
<a name="l00177"></a>00177 {
<a name="l00178"></a>00178 <span class="keywordflow">if</span> ( d_enabled && d_device != 0 && d_rect.isValid())
<a name="l00179"></a>00179 {
<a name="l00180"></a>00180 <span class="comment">// We need a painter to find out if</span>
<a name="l00181"></a>00181 <span class="comment">// there is a painter redirection for d_device.</span>
<a name="l00182"></a>00182
<a name="l00183"></a>00183 <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpainter.html">QPainter</a> *p;
<a name="l00184"></a>00184 <span class="keywordflow">if</span> ( d_devicePainter == 0 )
<a name="l00185"></a>00185 p = <span class="keyword">new</span> <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpainter.html">QPainter</a>(d_device);
<a name="l00186"></a>00186 <span class="keywordflow">else</span>
<a name="l00187"></a>00187 p = d_devicePainter;
<a name="l00188"></a>00188
<a name="l00189"></a>00189 <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpaintdevice.html">QPaintDevice</a> *device = p-><a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpainter.html#device">device</a>();
<a name="l00190"></a>00190 <span class="preprocessor">#if QT_VERSION < 0x040000</span>
<a name="l00191"></a>00191 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( device-><a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpaintdevice.html#isExtDev">isExtDev</a>() )
<a name="l00192"></a>00192 #<span class="keywordflow">else</span>
<a name="l00193"></a>00193 QPaintEngine * pe = device -> paintEngine ();
<a name="l00194"></a>00194 <a class="code" href="namespacehippodraw_1_1Axes.html#a1d1cfd8ffb84e947f82999c682b666a7" title="Axes constants.">QPaintEngine::Type</a> <a class="code" href="namespacenum__util.html#af7e893a8c6a5f6a426480fc85cda4fa1">type</a> = pe-> <a class="code" href="namespacenum__util.html#af7e893a8c6a5f6a426480fc85cda4fa1">type</a> ();
<a name="l00195"></a>00195 <span class="keywordflow">if</span> ( type != QPaintEngine::PostScript )
<a name="l00196"></a>00196 <span class="preprocessor">#endif</span>
<a name="l00197"></a>00197 <span class="preprocessor"></span> d_devicePainter->drawPixmap(d_rect.topLeft(), d_pixBuffer);
<a name="l00198"></a>00198 <span class="keywordflow">else</span>
<a name="l00199"></a>00199 bitBlt(device, d_rect.topLeft(), &d_pixBuffer );
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="keywordflow">if</span> ( d_devicePainter == 0 )
<a name="l00202"></a>00202 <span class="keyword">delete</span> p;
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205
<a name="l00209"></a>00209 <span class="keywordtype">void</span> QwtPaintBuffer::close()
<a name="l00210"></a>00210 {
<a name="l00211"></a>00211 flush();
<a name="l00212"></a>00212
<a name="l00213"></a>00213 <span class="keywordflow">if</span> ( d_painter )
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 <span class="keywordflow">if</span> ( d_painter->isActive() )
<a name="l00216"></a>00216 d_painter->end();
<a name="l00217"></a>00217
<a name="l00218"></a>00218 <span class="keywordflow">if</span> ( d_painter != d_devicePainter )
<a name="l00219"></a>00219 <span class="keyword">delete</span> d_painter;
<a name="l00220"></a>00220 }
<a name="l00221"></a>00221
<a name="l00222"></a>00222 <span class="keywordflow">if</span> ( !d_pixBuffer.isNull() )
<a name="l00223"></a>00223 d_pixBuffer = <a class="codeRef" doxygen="qt.tag:http://doc.trolltech.com/3.3/" href="http://doc.trolltech.com/3.3/qpixmap.html">QPixmap</a>();
<a name="l00224"></a>00224
<a name="l00225"></a>00225 d_device = 0;
<a name="l00226"></a>00226 d_painter = 0;
<a name="l00227"></a>00227 d_devicePainter = 0;
<a name="l00228"></a>00228 }
<a name="l00229"></a>00229
<a name="l00230"></a>00230 } <span class="comment">// namespace hippodraw</span>
<a name="l00231"></a>00231
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