📄 qwt__knob_8cpp-source.html
字号:
<!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_knob.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_knob.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 <qpainter.h></span><a name="l00011"></a>00011 <span class="preprocessor">#if QT_VERSION >= 0x040000</span><a name="l00012"></a>00012 <span class="preprocessor"></span><span class="preprocessor">#include <qpaintengine.h></span><a name="l00013"></a>00013 <span class="preprocessor">#endif</span><a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#include <qpalette.h></span><a name="l00015"></a>00015 <span class="preprocessor">#include <qstyle.h></span><a name="l00016"></a>00016 <span class="preprocessor">#include <qevent.h></span><a name="l00017"></a>00017 <span class="preprocessor">#include "qwt_round_scale_draw.h"</span><a name="l00018"></a>00018 <span class="preprocessor">#include "qwt_knob.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_painter.h"</span><a name="l00021"></a>00021 <span class="preprocessor">#include "qwt_paint_buffer.h"</span><a name="l00022"></a>00022 <a name="l00023"></a>00023 <span class="keyword">class </span>QwtKnob::PrivateData<a name="l00024"></a>00024 {<a name="l00025"></a>00025 <span class="keyword">public</span>:<a name="l00026"></a>00026 PrivateData()<a name="l00027"></a>00027 {<a name="l00028"></a>00028 angle = 0.0;<a name="l00029"></a>00029 nTurns = 0.0;<a name="l00030"></a>00030 <a class="code" href="class_qwt_knob.html#3e19de6a4762aeaf2b95266b20961574">borderWidth</a> = 2;<a name="l00031"></a>00031 borderDist = 4;<a name="l00032"></a>00032 <a class="code" href="class_qwt_knob.html#804d957c14e08bd9b132985c892ab853">totalAngle</a> = 270.0;<a name="l00033"></a>00033 scaleDist = 4;<a name="l00034"></a>00034 <a class="code" href="class_qwt_knob.html#d99ead1799a7390f7e290062d548385b">symbol</a> = Line;<a name="l00035"></a>00035 maxScaleTicks = 11;<a name="l00036"></a>00036 <a class="code" href="class_qwt_knob.html#a9470eed740c7175c7ccfc4406eb5fc2">knobWidth</a> = 50;<a name="l00037"></a>00037 dotWidth = 8;<a name="l00038"></a>00038 }<a name="l00039"></a>00039 <a name="l00040"></a>00040 <span class="keywordtype">int</span> <a class="code" href="class_qwt_knob.html#3e19de6a4762aeaf2b95266b20961574">borderWidth</a>;<a name="l00041"></a>00041 <span class="keywordtype">int</span> borderDist;<a name="l00042"></a>00042 <span class="keywordtype">int</span> scaleDist;<a name="l00043"></a>00043 <span class="keywordtype">int</span> maxScaleTicks;<a name="l00044"></a>00044 <span class="keywordtype">int</span> <a class="code" href="class_qwt_knob.html#a9470eed740c7175c7ccfc4406eb5fc2">knobWidth</a>;<a name="l00045"></a>00045 <span class="keywordtype">int</span> dotWidth;<a name="l00046"></a>00046 <a name="l00047"></a>00047 <a class="code" href="class_qwt_knob.html#a72613ae9e19a921beffaf8c99ab87f0">Symbol</a> <a class="code" href="class_qwt_knob.html#d99ead1799a7390f7e290062d548385b">symbol</a>;<a name="l00048"></a>00048 <span class="keywordtype">double</span> angle;<a name="l00049"></a>00049 <span class="keywordtype">double</span> <a class="code" href="class_qwt_knob.html#804d957c14e08bd9b132985c892ab853">totalAngle</a>;<a name="l00050"></a>00050 <span class="keywordtype">double</span> nTurns;<a name="l00051"></a>00051 <a name="l00052"></a>00052 QRect knobRect; <span class="comment">// bounding rect of the knob without scale</span><a name="l00053"></a>00053 };<a name="l00054"></a>00054 <a name="l00059"></a><a class="code" href="class_qwt_knob.html#767e89f3d4875da7d2074050572e0556">00059</a> <a class="code" href="class_qwt_knob.html#767e89f3d4875da7d2074050572e0556">QwtKnob::QwtKnob</a>(QWidget* parent): <a name="l00060"></a>00060 <a class="code" href="class_qwt_abstract_slider.html">QwtAbstractSlider</a>(Qt::Horizontal, parent)<a name="l00061"></a>00061 {<a name="l00062"></a>00062 initKnob();<a name="l00063"></a>00063 }<a name="l00064"></a>00064 <a name="l00065"></a>00065 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00066"></a>00066 <span class="preprocessor"></span><a name="l00071"></a>00071 <a class="code" href="class_qwt_knob.html#767e89f3d4875da7d2074050572e0556">QwtKnob::QwtKnob</a>(QWidget* parent, <span class="keyword">const</span> <span class="keywordtype">char</span> *name): <a name="l00072"></a>00072 <a class="code" href="class_qwt_abstract_slider.html">QwtAbstractSlider</a>(Qt::Horizontal, parent)<a name="l00073"></a>00073 {<a name="l00074"></a>00074 setName(name);<a name="l00075"></a>00075 initKnob();<a name="l00076"></a>00076 }<a name="l00077"></a>00077 <span class="preprocessor">#endif</span><a name="l00078"></a>00078 <span class="preprocessor"></span><a name="l00079"></a>00079 <span class="keywordtype">void</span> QwtKnob::initKnob()<a name="l00080"></a>00080 {<a name="l00081"></a>00081 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00082"></a>00082 <span class="preprocessor"></span> setWFlags(Qt::WNoAutoErase);<a name="l00083"></a>00083 <span class="preprocessor">#endif</span><a name="l00084"></a>00084 <span class="preprocessor"></span><a name="l00085"></a>00085 d_data = <span class="keyword">new</span> PrivateData;<a name="l00086"></a>00086 <a name="l00087"></a>00087 <a class="code" href="class_qwt_knob.html#fea44f23da7f79a2b790178850c26edd">setScaleDraw</a>(<span class="keyword">new</span> <a class="code" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a>());<a name="l00088"></a>00088 <a name="l00089"></a>00089 <a class="code" href="class_qwt_abstract_slider.html#945ba36e1b8e20d362083f6737b0601d">setUpdateTime</a>(50);<a name="l00090"></a>00090 <a class="code" href="class_qwt_knob.html#82c6a859d63833894a6e66f0fdbf8f05">setTotalAngle</a>( 270.0 );<a name="l00091"></a>00091 recalcAngle();<a name="l00092"></a>00092 setSizePolicy(QSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum));<a name="l00093"></a>00093 <a name="l00094"></a>00094 <a class="code" href="class_qwt_double_range.html#43891011664b74b8e5454763a3f5ff21">setRange</a>(0.0, 10.0, 1.0);<a name="l00095"></a>00095 <a class="code" href="class_qwt_abstract_slider.html#c3713f8989b647cb79f0a5894991e36a">setValue</a>(0.0);<a name="l00096"></a>00096 }<a name="l00097"></a>00097 <a name="l00099"></a><a class="code" href="class_qwt_knob.html#13f3e622b333c9918bc61844029f8a70">00099</a> <a class="code" href="class_qwt_knob.html#13f3e622b333c9918bc61844029f8a70">QwtKnob::~QwtKnob</a>()<a name="l00100"></a>00100 {<a name="l00101"></a>00101 <span class="keyword">delete</span> d_data;<a name="l00102"></a>00102 }<a name="l00103"></a>00103 <a name="l00108"></a><a class="code" href="class_qwt_knob.html#63421f4b0d0745608bb6c202b0492eaf">00108</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_knob.html#63421f4b0d0745608bb6c202b0492eaf">QwtKnob::setSymbol</a>(<a class="code" href="class_qwt_knob.html#a72613ae9e19a921beffaf8c99ab87f0">QwtKnob::Symbol</a> s)<a name="l00109"></a>00109 {<a name="l00110"></a>00110 <span class="keywordflow">if</span> ( d_data->symbol != s )<a name="l00111"></a>00111 {<a name="l00112"></a>00112 d_data->symbol = s;<a name="l00113"></a>00113 update();<a name="l00114"></a>00114 }<a name="l00115"></a>00115 }<a name="l00116"></a>00116 <a name="l00121"></a><a class="code" href="class_qwt_knob.html#d99ead1799a7390f7e290062d548385b">00121</a> <a class="code" href="class_qwt_knob.html#a72613ae9e19a921beffaf8c99ab87f0">QwtKnob::Symbol</a> <a class="code" href="class_qwt_knob.html#d99ead1799a7390f7e290062d548385b">QwtKnob::symbol</a>()<span class="keyword"> const</span><a name="l00122"></a>00122 <span class="keyword"></span>{<a name="l00123"></a>00123 <span class="keywordflow">return</span> d_data->symbol;<a name="l00124"></a>00124 }<a name="l00125"></a>00125 <a name="l00134"></a><a class="code" href="class_qwt_knob.html#82c6a859d63833894a6e66f0fdbf8f05">00134</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_knob.html#82c6a859d63833894a6e66f0fdbf8f05">QwtKnob::setTotalAngle</a> (<span class="keywordtype">double</span> angle)<a name="l00135"></a>00135 {<a name="l00136"></a>00136 <span class="keywordflow">if</span> (angle < 10.0)<a name="l00137"></a>00137 d_data->totalAngle = 10.0;<a name="l00138"></a>00138 <span class="keywordflow">else</span><a name="l00139"></a>00139 d_data->totalAngle = angle;<a name="l00140"></a>00140 <a name="l00141"></a>00141 <a class="code" href="class_qwt_knob.html#a9c4c23e20fc59b3ca2bfed9fe1e3719">scaleDraw</a>()-><a class="code" href="class_qwt_round_scale_draw.html#5d85678fdb9fbb4d622425aab9ecc681">setAngleRange</a>( -0.5 * d_data->totalAngle, <a name="l00142"></a>00142 0.5 * d_data->totalAngle);<a name="l00143"></a>00143 layoutKnob();<a name="l00144"></a>00144 }<a name="l00145"></a>00145 <a name="l00147"></a><a class="code" href="class_qwt_knob.html#804d957c14e08bd9b132985c892ab853">00147</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_knob.html#804d957c14e08bd9b132985c892ab853">QwtKnob::totalAngle</a>()<span class="keyword"> const </span><a name="l00148"></a>00148 <span class="keyword"></span>{<a name="l00149"></a>00149 <span class="keywordflow">return</span> d_data->totalAngle;<a name="l00150"></a>00150 }<a name="l00151"></a>00151 <a name="l00161"></a><a class="code" href="class_qwt_knob.html#fea44f23da7f79a2b790178850c26edd">00161</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_knob.html#fea44f23da7f79a2b790178850c26edd">QwtKnob::setScaleDraw</a>(<a class="code" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> *scaleDraw)<a name="l00162"></a>00162 {<a name="l00163"></a>00163 <a class="code" href="class_qwt_abstract_scale.html#950c5bf521dc704b78f76c7951346288">setAbstractScaleDraw</a>(<a class="code" href="class_qwt_knob.html#a9c4c23e20fc59b3ca2bfed9fe1e3719">scaleDraw</a>);<a name="l00164"></a>00164 }<a name="l00165"></a>00165 <a name="l00170"></a><a class="code" href="class_qwt_knob.html#a9c4c23e20fc59b3ca2bfed9fe1e3719">00170</a> <span class="keyword">const</span> <a class="code" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> *<a class="code" href="class_qwt_knob.html#a9c4c23e20fc59b3ca2bfed9fe1e3719">QwtKnob::scaleDraw</a>()<span class="keyword"> const</span><a name="l00171"></a>00171 <span class="keyword"></span>{<a name="l00172"></a>00172 <span class="keywordflow">return</span> (<a class="code" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> *)<a class="code" href="class_qwt_abstract_scale.html#b3c5f30892792e5ca3d84f4409ef6216">abstractScaleDraw</a>();<a name="l00173"></a>00173 }⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -