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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_color_map.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_color_map.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="preprocessor">#include "qwt_array.h"</span><a name="l00011"></a>00011 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00012"></a>00012 <span class="preprocessor">#include "qwt_double_interval.h"</span><a name="l00013"></a>00013 <span class="preprocessor">#include "qwt_color_map.h"</span><a name="l00014"></a>00014 <a name="l00015"></a>00015 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00016"></a>00016 <span class="preprocessor"></span><span class="preprocessor">#include <qvaluelist.h></span><a name="l00017"></a>00017 <span class="keyword">typedef</span> QValueVector<QRgb> QwtColorTable;<a name="l00018"></a>00018 <span class="preprocessor">#else</span><a name="l00019"></a>00019 <span class="preprocessor"></span><span class="keyword">typedef</span> QVector<QRgb> QwtColorTable;<a name="l00020"></a>00020 <span class="preprocessor">#endif</span><a name="l00021"></a>00021 <span class="preprocessor"></span><a name="l00022"></a>00022 <span class="keyword">class </span>QwtLinearColorMap::ColorStops<a name="l00023"></a>00023 {<a name="l00024"></a>00024 <span class="keyword">public</span>:<a name="l00025"></a>00025 ColorStops()<a name="l00026"></a>00026 {<a name="l00027"></a>00027 <span class="preprocessor">#if QT_VERSION >= 0x040000</span><a name="l00028"></a>00028 <span class="preprocessor"></span> _stops.reserve(256);<a name="l00029"></a>00029 <span class="preprocessor">#endif</span><a name="l00030"></a>00030 <span class="preprocessor"></span> }<a name="l00031"></a>00031 <a name="l00032"></a>00032 <span class="keywordtype">void</span> insert(<span class="keywordtype">double</span> pos, <span class="keyword">const</span> QColor &<a class="code" href="class_qwt_color_map.html#f5f3c1df460cee0ec48005e7f161423d">color</a>);<a name="l00033"></a>00033 QRgb <a class="code" href="class_qwt_linear_color_map.html#db056bd9487fde980a85da8ea5ec6188">rgb</a>(<a class="code" href="class_qwt_linear_color_map.html#c8c5f1991f533b1d25a9a0a0874b7d54">QwtLinearColorMap::Mode</a>, <span class="keywordtype">double</span> pos) <span class="keyword">const</span>;<a name="l00034"></a>00034 <a name="l00035"></a>00035 QwtArray<double> stops() <span class="keyword">const</span>;<a name="l00036"></a>00036 <a name="l00037"></a>00037 <span class="keyword">private</span>:<a name="l00038"></a>00038 <a name="l00039"></a>00039 <span class="keyword">class </span>ColorStop<a name="l00040"></a>00040 {<a name="l00041"></a>00041 <span class="keyword">public</span>:<a name="l00042"></a>00042 ColorStop():<a name="l00043"></a>00043 pos(0.0),<a name="l00044"></a>00044 <a class="code" href="class_qwt_linear_color_map.html#db056bd9487fde980a85da8ea5ec6188">rgb</a>(0)<a name="l00045"></a>00045 {<a name="l00046"></a>00046 };<a name="l00047"></a>00047 <a name="l00048"></a>00048 ColorStop(<span class="keywordtype">double</span> p, <span class="keyword">const</span> QColor &c):<a name="l00049"></a>00049 pos(p),<a name="l00050"></a>00050 <a class="code" href="class_qwt_linear_color_map.html#db056bd9487fde980a85da8ea5ec6188">rgb</a>(c.<a class="code" href="class_qwt_linear_color_map.html#db056bd9487fde980a85da8ea5ec6188">rgb</a>())<a name="l00051"></a>00051 {<a name="l00052"></a>00052 r = qRed(<a class="code" href="class_qwt_linear_color_map.html#db056bd9487fde980a85da8ea5ec6188">rgb</a>);<a name="l00053"></a>00053 g = qGreen(<a class="code" href="class_qwt_linear_color_map.html#db056bd9487fde980a85da8ea5ec6188">rgb</a>);<a name="l00054"></a>00054 b = qBlue(<a class="code" href="class_qwt_linear_color_map.html#db056bd9487fde980a85da8ea5ec6188">rgb</a>);<a name="l00055"></a>00055 }<a name="l00056"></a>00056 <a name="l00057"></a>00057 <span class="keywordtype">double</span> pos;<a name="l00058"></a>00058 QRgb <a class="code" href="class_qwt_linear_color_map.html#db056bd9487fde980a85da8ea5ec6188">rgb</a>;<a name="l00059"></a>00059 <span class="keywordtype">int</span> r, g, b;<a name="l00060"></a>00060 };<a name="l00061"></a>00061 <a name="l00062"></a>00062 <span class="keyword">inline</span> <span class="keywordtype">int</span> findUpper(<span class="keywordtype">double</span> pos) <span class="keyword">const</span>; <a name="l00063"></a>00063 QwtArray<ColorStop> _stops;<a name="l00064"></a>00064 };<a name="l00065"></a>00065 <a name="l00066"></a>00066 <span class="keywordtype">void</span> QwtLinearColorMap::ColorStops::insert(<span class="keywordtype">double</span> pos, <span class="keyword">const</span> QColor &<a class="code" href="class_qwt_color_map.html#f5f3c1df460cee0ec48005e7f161423d">color</a>)<a name="l00067"></a>00067 {<a name="l00068"></a>00068 <span class="comment">// Lookups need to be very fast, insertions are not so important.</span><a name="l00069"></a>00069 <span class="comment">// Anyway, a balanced tree is what we need here. TODO ...</span><a name="l00070"></a>00070 <a name="l00071"></a>00071 <span class="keywordflow">if</span> ( pos < 0.0 || pos > 1.0 )<a name="l00072"></a>00072 <span class="keywordflow">return</span>;<a name="l00073"></a>00073 <a name="l00074"></a>00074 <span class="keywordtype">int</span> index;<a name="l00075"></a>00075 <span class="keywordflow">if</span> ( _stops.size() == 0 )<a name="l00076"></a>00076 {<a name="l00077"></a>00077 index = 0;<a name="l00078"></a>00078 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00079"></a>00079 <span class="preprocessor"></span> _stops.resize(1, QGArray::SpeedOptim);<a name="l00080"></a>00080 <span class="preprocessor">#else</span><a name="l00081"></a>00081 <span class="preprocessor"></span> _stops.resize(1);<a name="l00082"></a>00082 <span class="preprocessor">#endif</span><a name="l00083"></a>00083 <span class="preprocessor"></span> }<a name="l00084"></a>00084 <span class="keywordflow">else</span><a name="l00085"></a>00085 {<a name="l00086"></a>00086 index = findUpper(pos);<a name="l00087"></a>00087 <span class="keywordflow">if</span> ( index == (<span class="keywordtype">int</span>)_stops.size() || <a name="l00088"></a>00088 qwtAbs(_stops[index].pos - pos) >= 0.001 )<a name="l00089"></a>00089 {<a name="l00090"></a>00090 #<span class="keywordflow">if</span> QT_VERSION < 0x040000<a name="l00091"></a>00091 _stops.resize(_stops.size() + 1, QGArray::SpeedOptim);<a name="l00092"></a>00092 <span class="preprocessor">#else</span><a name="l00093"></a>00093 <span class="preprocessor"></span> _stops.resize(_stops.size() + 1);<a name="l00094"></a>00094 <span class="preprocessor">#endif</span><a name="l00095"></a>00095 <span class="preprocessor"></span> <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = _stops.size() - 1; i > index; i-- )<a name="l00096"></a>00096 _stops[i] = _stops[i-1];<a name="l00097"></a>00097 }<a name="l00098"></a>00098 }<a name="l00099"></a>00099 <a name="l00100"></a>00100 _stops[index] = ColorStop(pos, color);<a name="l00101"></a>00101 }<a name="l00102"></a>00102 <a name="l00103"></a>00103 <span class="keyword">inline</span> QwtArray<double> QwtLinearColorMap::ColorStops::stops()<span class="keyword"> const</span><a name="l00104"></a>00104 <span class="keyword"></span>{<a name="l00105"></a>00105 QwtArray<double> positions(_stops.size());<a name="l00106"></a>00106 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i < (int)_stops.size(); i++ )<a name="l00107"></a>00107 positions[i] = _stops[i].pos;<a name="l00108"></a>00108 <span class="keywordflow">return</span> positions;<a name="l00109"></a>00109 }<a name="l00110"></a>00110 <a name="l00111"></a>00111 <span class="keyword">inline</span> <span class="keywordtype">int</span> QwtLinearColorMap::ColorStops::findUpper(<span class="keywordtype">double</span> pos)<span class="keyword"> const</span><a name="l00112"></a>00112 <span class="keyword"></span>{<a name="l00113"></a>00113 <span class="keywordtype">int</span> index = 0;<a name="l00114"></a>00114 <span class="keywordtype">int</span> n = _stops.size();<a name="l00115"></a>00115 <a name="l00116"></a>00116 <span class="keyword">const</span> ColorStop *stops = _stops.data();<a name="l00117"></a>00117 <a name="l00118"></a>00118 <span class="keywordflow">while</span> (n > 0) <a name="l00119"></a>00119 {<a name="l00120"></a>00120 <span class="keyword">const</span> <span class="keywordtype">int</span> half = n >> 1;⌨️ 快捷键说明
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