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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_wheel.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_wheel.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 <qevent.h></span><a name="l00011"></a>00011 <span class="preprocessor">#include <qdrawutil.h></span><a name="l00012"></a>00012 <span class="preprocessor">#include <qpainter.h></span><a name="l00013"></a>00013 <span class="preprocessor">#include <qstyle.h></span><a name="l00014"></a>00014 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00015"></a>00015 <span class="preprocessor">#include "qwt_painter.h"</span><a name="l00016"></a>00016 <span class="preprocessor">#include "qwt_paint_buffer.h"</span><a name="l00017"></a>00017 <span class="preprocessor">#include "qwt_wheel.h"</span><a name="l00018"></a>00018 <a name="l00019"></a>00019 <span class="preprocessor">#define NUM_COLORS 30</span><a name="l00020"></a>00020 <span class="preprocessor"></span><a name="l00021"></a>00021 <span class="keyword">class </span>QwtWheel::PrivateData<a name="l00022"></a>00022 {<a name="l00023"></a>00023 <span class="keyword">public</span>:<a name="l00024"></a>00024 PrivateData()<a name="l00025"></a>00025 {<a name="l00026"></a>00026 <a class="code" href="class_qwt_wheel.html#49c04ea6e1ec21268f63d45239bc9333">viewAngle</a> = 175.0;<a name="l00027"></a>00027 <a class="code" href="class_qwt_wheel.html#c05734986ee427e6d820f54a267dde26">totalAngle</a> = 360.0;<a name="l00028"></a>00028 <a class="code" href="class_qwt_wheel.html#02e84c468d3175278a490185ca4a7c2a">tickCnt</a> = 10;<a name="l00029"></a>00029 intBorder = 2;<a name="l00030"></a>00030 borderWidth = 2;<a name="l00031"></a>00031 wheelWidth = 20;<a name="l00032"></a>00032 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00033"></a>00033 <span class="preprocessor"></span> allocContext = 0;<a name="l00034"></a>00034 <span class="preprocessor">#endif</span><a name="l00035"></a>00035 <span class="preprocessor"></span> };<a name="l00036"></a>00036 <a name="l00037"></a>00037 QRect sliderRect;<a name="l00038"></a>00038 <span class="keywordtype">double</span> <a class="code" href="class_qwt_wheel.html#49c04ea6e1ec21268f63d45239bc9333">viewAngle</a>;<a name="l00039"></a>00039 <span class="keywordtype">double</span> <a class="code" href="class_qwt_wheel.html#c05734986ee427e6d820f54a267dde26">totalAngle</a>;<a name="l00040"></a>00040 <span class="keywordtype">int</span> <a class="code" href="class_qwt_wheel.html#02e84c468d3175278a490185ca4a7c2a">tickCnt</a>;<a name="l00041"></a>00041 <span class="keywordtype">int</span> intBorder;<a name="l00042"></a>00042 <span class="keywordtype">int</span> borderWidth;<a name="l00043"></a>00043 <span class="keywordtype">int</span> wheelWidth;<a name="l00044"></a>00044 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00045"></a>00045 <span class="preprocessor"></span> <span class="keywordtype">int</span> allocContext;<a name="l00046"></a>00046 <span class="preprocessor">#endif</span><a name="l00047"></a>00047 <span class="preprocessor"></span> QColor colors[NUM_COLORS];<a name="l00048"></a>00048 };<a name="l00049"></a>00049 <a name="l00051"></a><a class="code" href="class_qwt_wheel.html#98fc47123aac47168b5d98a73b87d0a7">00051</a> <a class="code" href="class_qwt_wheel.html#98fc47123aac47168b5d98a73b87d0a7">QwtWheel::QwtWheel</a>(QWidget *parent): <a name="l00052"></a>00052 <a class="code" href="class_qwt_abstract_slider.html">QwtAbstractSlider</a>(Qt::Horizontal, parent)<a name="l00053"></a>00053 {<a name="l00054"></a>00054 initWheel();<a name="l00055"></a>00055 }<a name="l00056"></a>00056 <a name="l00057"></a>00057 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00058"></a>00058 <span class="preprocessor"></span><a class="code" href="class_qwt_wheel.html#98fc47123aac47168b5d98a73b87d0a7">QwtWheel::QwtWheel</a>(QWidget *parent, <span class="keyword">const</span> <span class="keywordtype">char</span> *name): <a name="l00059"></a>00059 <a class="code" href="class_qwt_abstract_slider.html">QwtAbstractSlider</a>(Qt::Horizontal, parent)<a name="l00060"></a>00060 {<a name="l00061"></a>00061 setName(name);<a name="l00062"></a>00062 initWheel();<a name="l00063"></a>00063 }<a name="l00064"></a>00064 <span class="preprocessor">#endif</span><a name="l00065"></a>00065 <span class="preprocessor"></span><a name="l00066"></a>00066 <span class="keywordtype">void</span> QwtWheel::initWheel()<a name="l00067"></a>00067 {<a name="l00068"></a>00068 d_data = <span class="keyword">new</span> PrivateData;<a name="l00069"></a>00069 <a name="l00070"></a>00070 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00071"></a>00071 <span class="preprocessor"></span> setWFlags(Qt::WNoAutoErase);<a name="l00072"></a>00072 <span class="preprocessor">#endif</span><a name="l00073"></a>00073 <span class="preprocessor"></span><a name="l00074"></a>00074 setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);<a name="l00075"></a>00075 <a name="l00076"></a>00076 <span class="preprocessor">#if QT_VERSION >= 0x040000</span><a name="l00077"></a>00077 <span class="preprocessor"></span> setAttribute(Qt::WA_WState_OwnSizePolicy, <span class="keyword">false</span>);<a name="l00078"></a>00078 <span class="preprocessor">#else</span><a name="l00079"></a>00079 <span class="preprocessor"></span> clearWState( WState_OwnSizePolicy );<a name="l00080"></a>00080 <span class="preprocessor">#endif</span><a name="l00081"></a>00081 <span class="preprocessor"></span><a name="l00082"></a>00082 <a class="code" href="class_qwt_abstract_slider.html#945ba36e1b8e20d362083f6737b0601d">setUpdateTime</a>(50);<a name="l00083"></a>00083 }<a name="l00084"></a>00084 <a name="l00086"></a><a class="code" href="class_qwt_wheel.html#57f465a31a9d2d88cb7a1d0e6391535e">00086</a> <a class="code" href="class_qwt_wheel.html#57f465a31a9d2d88cb7a1d0e6391535e">QwtWheel::~QwtWheel</a>() <a name="l00087"></a>00087 {<a name="l00088"></a>00088 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00089"></a>00089 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( d_data->allocContext )<a name="l00090"></a>00090 QColor::destroyAllocContext( d_data->allocContext );<a name="l00091"></a>00091 <span class="preprocessor">#endif</span><a name="l00092"></a>00092 <span class="preprocessor"></span> <span class="keyword">delete</span> d_data;<a name="l00093"></a>00093 }<a name="l00094"></a>00094 <a name="l00096"></a><a class="code" href="class_qwt_wheel.html#f7d32d9b65d1f55913656a44b2a20646">00096</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#f7d32d9b65d1f55913656a44b2a20646">QwtWheel::setColorArray</a>()<a name="l00097"></a>00097 {<a name="l00098"></a>00098 <span class="keywordflow">if</span> ( !d_data->colors ) <a name="l00099"></a>00099 <span class="keywordflow">return</span>;<a name="l00100"></a>00100 <a name="l00101"></a>00101 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00102"></a>00102 <span class="preprocessor"></span> <span class="keyword">const</span> QColor light = colorGroup().light();<a name="l00103"></a>00103 <span class="keyword">const</span> QColor dark = colorGroup().dark();<a name="l00104"></a>00104 <span class="preprocessor">#else</span><a name="l00105"></a>00105 <span class="preprocessor"></span> <span class="keyword">const</span> QColor light = palette().color(QPalette::Light);<a name="l00106"></a>00106 <span class="keyword">const</span> QColor dark = palette().color(QPalette::Dark);<a name="l00107"></a>00107 <span class="preprocessor">#endif</span><a name="l00108"></a>00108 <span class="preprocessor"></span><a name="l00109"></a>00109 <span class="keywordflow">if</span> ( !d_data->colors[0].isValid() ||<a name="l00110"></a>00110 d_data->colors[0] != light ||<a name="l00111"></a>00111 d_data->colors[NUM_COLORS - 1] != dark )<a name="l00112"></a>00112 {<a name="l00113"></a>00113 #<span class="keywordflow">if</span> QT_VERSION < 0x040000<a name="l00114"></a>00114 <span class="keywordflow">if</span> ( d_data->allocContext )<a name="l00115"></a>00115 QColor::destroyAllocContext( d_data->allocContext );<a name="l00116"></a>00116 <a name="l00117"></a>00117 d_data->allocContext = QColor::enterAllocContext();<a name="l00118"></a>00118 <span class="preprocessor">#endif</span><a name="l00119"></a>00119 <span class="preprocessor"></span><a name="l00120"></a>00120 d_data->colors[0] = light;<a name="l00121"></a>00121 d_data->colors[NUM_COLORS - 1] = dark;<a name="l00122"></a>00122 <a name="l00123"></a>00123 <span class="keywordtype">int</span> dh, ds, dv, lh, ls, lv;<a name="l00124"></a>00124 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00125"></a>00125 <span class="preprocessor"></span> d_data->colors[0].rgb(&lh, &ls, &lv);<a name="l00126"></a>00126 d_data->colors[NUM_COLORS - 1].rgb(&dh, &ds, &dv);<a name="l00127"></a>00127 <span class="preprocessor">#else</span><a name="l00128"></a>00128 <span class="preprocessor"></span> d_data->colors[0].getRgb(&lh, &ls, &lv);<a name="l00129"></a>00129 d_data->colors[NUM_COLORS - 1].getRgb(&dh, &ds, &dv);<a name="l00130"></a>00130 <span class="preprocessor">#endif</span><a name="l00131"></a>00131 <span class="preprocessor"></span><a name="l00132"></a>00132 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 1; i < NUM_COLORS - 1; ++i )<a name="l00133"></a>00133 {<a name="l00134"></a>00134 <span class="keyword">const</span> <span class="keywordtype">double</span> factor = <span class="keywordtype">double</span>(i) / <span class="keywordtype">double</span>(NUM_COLORS);<a name="l00135"></a>00135 <a name="l00136"></a>00136 d_data->colors[i].setRgb( lh + <span class="keywordtype">int</span>( <span class="keywordtype">double</span>(dh - lh) * factor ),⌨️ 快捷键说明
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