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<div id="projectname">Qwt User's Guide <span id="projectnumber">5.2.2</span></div>
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<h1>qwt_plot_rasteritem.h</h1> </div>
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<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="preprocessor">#ifndef QWT_PLOT_RASTERITEM_H</span>
<a name="l00011"></a>00011 <span class="preprocessor"></span><span class="preprocessor">#define QWT_PLOT_RASTERITEM_H</span>
<a name="l00012"></a>00012 <span class="preprocessor"></span>
<a name="l00013"></a>00013 <span class="preprocessor">#include <qglobal.h></span>
<a name="l00014"></a>00014 <span class="preprocessor">#include <qstring.h></span>
<a name="l00015"></a>00015 <span class="preprocessor">#include <qimage.h></span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#include "qwt_plot_item.h"</span>
<a name="l00018"></a>00018
<a name="l00036"></a><a class="code" href="class_qwt_plot_raster_item.html">00036</a> <span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data.">QwtPlotRasterItem</a>: <span class="keyword">public</span> <a class="code" href="class_qwt_plot_item.html" title="Base class for items on the plot canvas.">QwtPlotItem</a>
<a name="l00037"></a>00037 {
<a name="l00038"></a>00038 <span class="keyword">public</span>:
<a name="l00056"></a><a class="code" href="class_qwt_plot_raster_item.html#a94929fc4c31c3dab75ee5adcac2d57b0">00056</a> <span class="keyword">enum</span> <a class="code" href="class_qwt_plot_raster_item.html#a94929fc4c31c3dab75ee5adcac2d57b0">CachePolicy</a>
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 NoCache,
<a name="l00059"></a>00059 PaintCache,
<a name="l00060"></a>00060 ScreenCache
<a name="l00061"></a>00061 };
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keyword">explicit</span> <a class="code" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data.">QwtPlotRasterItem</a>(<span class="keyword">const</span> QString& title = QString::null);
<a name="l00064"></a>00064 <span class="keyword">explicit</span> <a class="code" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data.">QwtPlotRasterItem</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_text.html" title="A class representing a text.">QwtText</a>& title);
<a name="l00065"></a>00065 <span class="keyword">virtual</span> ~<a class="code" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data.">QwtPlotRasterItem</a>();
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="keywordtype">void</span> setAlpha(<span class="keywordtype">int</span> alpha);
<a name="l00068"></a>00068 <span class="keywordtype">int</span> alpha() <span class="keyword">const</span>;
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="keywordtype">void</span> setCachePolicy(CachePolicy);
<a name="l00071"></a>00071 CachePolicy cachePolicy() <span class="keyword">const</span>;
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="keywordtype">void</span> invalidateCache();
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_item.html#a5483623e4fd1ae85b06b93523784358b" title="Draw the item.">draw</a>(QPainter *p,
<a name="l00076"></a>00076 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &yMap,
<a name="l00077"></a>00077 <span class="keyword">const</span> QRect &rect) <span class="keyword">const</span>;
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <span class="keyword">virtual</span> QSize rasterHint(<span class="keyword">const</span> QwtDoubleRect &) <span class="keyword">const</span>;
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="keyword">protected</span>:
<a name="l00082"></a>00082
<a name="l00093"></a>00093 <span class="keyword">virtual</span> QImage renderImage(<span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &xMap,
<a name="l00094"></a>00094 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &yMap, <span class="keyword">const</span> QwtDoubleRect &area
<a name="l00095"></a>00095 ) <span class="keyword">const</span> = 0;
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keyword">private</span>:
<a name="l00098"></a>00098 <a class="code" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data.">QwtPlotRasterItem</a>( <span class="keyword">const</span> <a class="code" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data.">QwtPlotRasterItem</a> & );
<a name="l00099"></a>00099 <a class="code" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data.">QwtPlotRasterItem</a> &operator=( <span class="keyword">const</span> <a class="code" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data.">QwtPlotRasterItem</a> & );
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keywordtype">void</span> init();
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keyword">class </span>PrivateData;
<a name="l00104"></a>00104 PrivateData *d_data;
<a name="l00105"></a>00105 };
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="preprocessor">#endif</span>
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