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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_dial.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_dial.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 <math.h></span><a name="l00011"></a>00011 <span class="preprocessor">#include <qpainter.h></span><a name="l00012"></a>00012 <span class="preprocessor">#if QT_VERSION >= 0x040000</span><a name="l00013"></a>00013 <span class="preprocessor"></span><span class="preprocessor">#include <qpaintengine.h></span><a name="l00014"></a>00014 <span class="preprocessor">#include <qbitmap.h></span><a name="l00015"></a>00015 <span class="preprocessor">#include <qpalette.h></span><a name="l00016"></a>00016 <span class="preprocessor">#endif</span><a name="l00017"></a>00017 <span class="preprocessor"></span><span class="preprocessor">#include <qpixmap.h></span><a name="l00018"></a>00018 <span class="preprocessor">#include <qevent.h></span><a name="l00019"></a>00019 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00020"></a>00020 <span class="preprocessor">#include "qwt_scale_engine.h"</span><a name="l00021"></a>00021 <span class="preprocessor">#include "qwt_scale_map.h"</span><a name="l00022"></a>00022 <span class="preprocessor">#include "qwt_paint_buffer.h"</span><a name="l00023"></a>00023 <span class="preprocessor">#include "qwt_painter.h"</span><a name="l00024"></a>00024 <span class="preprocessor">#include "qwt_dial_needle.h"</span><a name="l00025"></a>00025 <span class="preprocessor">#include "qwt_dial.h"</span><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><span class="keyword">static</span> <span class="keywordtype">void</span> setAntialiasing(QPainter *painter, <span class="keywordtype">bool</span> on)<a name="l00029"></a>00029 {<a name="l00030"></a>00030 QPaintEngine *engine = painter->paintEngine();<a name="l00031"></a>00031 <span class="keywordflow">if</span> ( engine && engine->hasFeature(QPaintEngine::Antialiasing) )<a name="l00032"></a>00032 painter->setRenderHint(QPainter::Antialiasing, on);<a name="l00033"></a>00033 }<a name="l00034"></a>00034 <span class="preprocessor">#else</span><a name="l00035"></a>00035 <span class="preprocessor"></span><span class="keyword">static</span> <span class="keywordtype">void</span> setAntialiasing(QPainter *, <span class="keywordtype">bool</span>)<a name="l00036"></a>00036 {<a name="l00037"></a>00037 }<a name="l00038"></a>00038 <span class="preprocessor">#endif</span><a name="l00039"></a>00039 <span class="preprocessor"></span><a name="l00040"></a>00040 <span class="keyword">class </span>QwtDial::PrivateData<a name="l00041"></a>00041 {<a name="l00042"></a>00042 <span class="keyword">public</span>:<a name="l00043"></a>00043 PrivateData():<a name="l00044"></a>00044 visibleBackground(true),<a name="l00045"></a>00045 <a class="code" href="class_qwt_dial.html#49e37bd4da2ed2b846bba75c79a04fbc">frameShadow</a>(Sunken),<a name="l00046"></a>00046 <a class="code" href="class_qwt_dial.html#fb583edf70364eb562bf84686b60a9b7">lineWidth</a>(0),<a name="l00047"></a>00047 <a class="code" href="class_qwt_dial.html#fd95a47735c0cfe963dfacd1a6a36a6f">mode</a>(RotateNeedle),<a name="l00048"></a>00048 <a class="code" href="class_qwt_dial.html#5d7a8b9094bcc3fb82b31c3ac9ad706d">origin</a>(90.0),<a name="l00049"></a>00049 <a class="code" href="class_qwt_dial.html#1725682984aff88ef891966225c06030">minScaleArc</a>(0.0),<a name="l00050"></a>00050 <a class="code" href="class_qwt_dial.html#9d7a976894700e616126d41a312f999d">maxScaleArc</a>(0.0),<a name="l00051"></a>00051 <a class="code" href="class_qwt_dial.html#4e51987ef0800ddbd36a0923535a2cdd">scaleDraw</a>(0),<a name="l00052"></a>00052 maxMajIntv(36),<a name="l00053"></a>00053 maxMinIntv(10),<a name="l00054"></a>00054 scaleStep(0.0),<a name="l00055"></a>00055 <a class="code" href="class_qwt_dial.html#58ed8cf5aae56c44427b25f691f69b5c">needle</a>(0)<a name="l00056"></a>00056 {<a name="l00057"></a>00057 }<a name="l00058"></a>00058 <a name="l00059"></a>00059 ~PrivateData()<a name="l00060"></a>00060 {<a name="l00061"></a>00061 <span class="keyword">delete</span> <a class="code" href="class_qwt_dial.html#4e51987ef0800ddbd36a0923535a2cdd">scaleDraw</a>;<a name="l00062"></a>00062 <span class="keyword">delete</span> <a class="code" href="class_qwt_dial.html#58ed8cf5aae56c44427b25f691f69b5c">needle</a>;<a name="l00063"></a>00063 }<a name="l00064"></a>00064 <span class="keywordtype">bool</span> visibleBackground;<a name="l00065"></a>00065 <a class="code" href="class_qwt_dial.html#7472124cb120352e8538430ab48c2386">Shadow</a> <a class="code" href="class_qwt_dial.html#49e37bd4da2ed2b846bba75c79a04fbc">frameShadow</a>;<a name="l00066"></a>00066 <span class="keywordtype">int</span> <a class="code" href="class_qwt_dial.html#fb583edf70364eb562bf84686b60a9b7">lineWidth</a>;<a name="l00067"></a>00067 <a name="l00068"></a>00068 <a class="code" href="class_qwt_dial.html#7376f53193014b91643350e6e6bc85ad">QwtDial::Mode</a> <a class="code" href="class_qwt_dial.html#fd95a47735c0cfe963dfacd1a6a36a6f">mode</a>;<a name="l00069"></a>00069 <a name="l00070"></a>00070 <span class="keywordtype">double</span> <a class="code" href="class_qwt_dial.html#5d7a8b9094bcc3fb82b31c3ac9ad706d">origin</a>;<a name="l00071"></a>00071 <span class="keywordtype">double</span> <a class="code" href="class_qwt_dial.html#1725682984aff88ef891966225c06030">minScaleArc</a>;<a name="l00072"></a>00072 <span class="keywordtype">double</span> <a class="code" href="class_qwt_dial.html#9d7a976894700e616126d41a312f999d">maxScaleArc</a>;<a name="l00073"></a>00073 <a name="l00074"></a>00074 <a class="code" href="class_qwt_dial_scale_draw.html">QwtDialScaleDraw</a> *<a class="code" href="class_qwt_dial.html#4e51987ef0800ddbd36a0923535a2cdd">scaleDraw</a>;<a name="l00075"></a>00075 <span class="keywordtype">int</span> maxMajIntv;<a name="l00076"></a>00076 <span class="keywordtype">int</span> maxMinIntv;<a name="l00077"></a>00077 <span class="keywordtype">double</span> scaleStep;<a name="l00078"></a>00078 <a name="l00079"></a>00079 <a class="code" href="class_qwt_dial_needle.html">QwtDialNeedle</a> *<a class="code" href="class_qwt_dial.html#58ed8cf5aae56c44427b25f691f69b5c">needle</a>;<a name="l00080"></a>00080 <a name="l00081"></a>00081 <span class="keyword">static</span> <span class="keywordtype">double</span> previousDir;<a name="l00082"></a>00082 };<a name="l00083"></a>00083 <a name="l00084"></a>00084 <span class="keywordtype">double</span> QwtDial::PrivateData::previousDir = -1.0;<a name="l00085"></a>00085 <a name="l00091"></a><a class="code" href="class_qwt_dial_scale_draw.html#a410c51b310d1492db2c0bbc0c1df163">00091</a> <a class="code" href="class_qwt_dial_scale_draw.html#a410c51b310d1492db2c0bbc0c1df163">QwtDialScaleDraw::QwtDialScaleDraw</a>(<a class="code" href="class_qwt_dial.html">QwtDial</a> *parent):<a name="l00092"></a>00092 d_parent(parent),<a name="l00093"></a>00093 d_penWidth(1)<a name="l00094"></a>00094 {<a name="l00095"></a>00095 }<a name="l00096"></a>00096 <a name="l00104"></a><a class="code" href="class_qwt_dial_scale_draw.html#478f4bcd24e67485d3f796c8fde51f22">00104</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial_scale_draw.html#478f4bcd24e67485d3f796c8fde51f22">QwtDialScaleDraw::setPenWidth</a>(uint penWidth)<a name="l00105"></a>00105 {<a name="l00106"></a>00106 d_penWidth = penWidth;<a name="l00107"></a>00107 }<a name="l00108"></a>00108 <a name="l00113"></a><a class="code" href="class_qwt_dial_scale_draw.html#d4166431ea6010dfcfd69636f16006cb">00113</a> uint <a class="code" href="class_qwt_dial_scale_draw.html#d4166431ea6010dfcfd69636f16006cb">QwtDialScaleDraw::penWidth</a>()<span class="keyword"> const</span><a name="l00114"></a>00114 <span class="keyword"></span>{<a name="l00115"></a>00115 <span class="keywordflow">return</span> d_penWidth;<a name="l00116"></a>00116 }<a name="l00117"></a>00117 <a name="l00125"></a><a class="code" href="class_qwt_dial_scale_draw.html#a497b0ca0f1c4d27a0bcc3c30556cb09">00125</a> <a class="code" href="class_qwt_text.html">QwtText</a> <a class="code" href="class_qwt_dial_scale_draw.html#a497b0ca0f1c4d27a0bcc3c30556cb09">QwtDialScaleDraw::label</a>(<span class="keywordtype">double</span> value)<span class="keyword"> const</span><a name="l00126"></a>00126 <span class="keyword"></span>{<a name="l00127"></a>00127 <span class="keywordflow">if</span> ( d_parent == NULL )<a name="l00128"></a>00128 <span class="keywordflow">return</span> <a class="code" href="class_qwt_abstract_scale_draw.html#4ff88bc827dd6c6ca9298de13483b61f">QwtRoundScaleDraw::label</a>(value);<a name="l00129"></a>00129 <a name="l00130"></a>00130 <span class="keywordflow">return</span> d_parent-><a class="code" href="class_qwt_dial.html#b91f5aa6c54349d735fe22acd4f5a2e1">scaleLabel</a>(value);<a name="l00131"></a>00131 }<a name="l00132"></a>00132 <a name="l00143"></a><a class="code" href="class_qwt_dial.html#910ad090ceb51587c965d9a2c9db8f60">00143</a> <a class="code" href="class_qwt_dial.html#910ad090ceb51587c965d9a2c9db8f60">QwtDial::QwtDial</a>(QWidget* parent):<a name="l00144"></a>00144 <a class="code" href="class_qwt_abstract_slider.html">QwtAbstractSlider</a>(Qt::Horizontal, parent)<a name="l00145"></a>00145 {<a name="l00146"></a>00146 initDial();<a name="l00147"></a>00147 }<a name="l00148"></a>00148 <a name="l00149"></a>00149 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00150"></a>00150 <span class="preprocessor"></span><a name="l00160"></a>00160 <a class="code" href="class_qwt_dial.html#910ad090ceb51587c965d9a2c9db8f60">QwtDial::QwtDial</a>(QWidget* parent, <span class="keyword">const</span> <span class="keywordtype">char</span> *name):<a name="l00161"></a>00161 <a class="code" href="class_qwt_abstract_slider.html">QwtAbstractSlider</a>(Qt::Horizontal, parent)<a name="l00162"></a>00162 {<a name="l00163"></a>00163 setName(name);<a name="l00164"></a>00164 initDial();<a name="l00165"></a>00165 }<a name="l00166"></a>00166 <span class="preprocessor">#endif</span><a name="l00167"></a>00167 <span class="preprocessor"></span><a name="l00168"></a>00168 <span class="keywordtype">void</span> QwtDial::initDial()<a name="l00169"></a>00169 {<a name="l00170"></a>00170 d_data = <span class="keyword">new</span> PrivateData;<a name="l00171"></a>00171 <a name="l00172"></a>00172 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00173"></a>00173 <span class="preprocessor"></span> setWFlags(Qt::WNoAutoErase);<a name="l00174"></a>00174 <span class="preprocessor">#endif </span><a name="l00175"></a>00175 <span class="preprocessor"></span><a name="l00176"></a>00176 <span class="preprocessor">#if QT_VERSION >= 0x040000</span><a name="l00177"></a>00177 <span class="preprocessor"></span> <span class="keyword">using namespace </span>Qt;<a name="l00178"></a>00178 <span class="preprocessor">#endif</span>⌨️ 快捷键说明
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