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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_round_scale_draw.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_round_scale_draw.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="comment">// vim: expandtab</span><a name="l00011"></a>00011 <a name="l00012"></a>00012 <span class="preprocessor">#include <math.h></span><a name="l00013"></a>00013 <span class="preprocessor">#include <qpen.h></span><a name="l00014"></a>00014 <span class="preprocessor">#include <qpainter.h></span><a name="l00015"></a>00015 <span class="preprocessor">#include <qfontmetrics.h></span><a name="l00016"></a>00016 <span class="preprocessor">#include "qwt_painter.h"</span><a name="l00017"></a>00017 <span class="preprocessor">#include "qwt_scale_div.h"</span><a name="l00018"></a>00018 <span class="preprocessor">#include "qwt_scale_map.h"</span><a name="l00019"></a>00019 <span class="preprocessor">#include "qwt_round_scale_draw.h"</span><a name="l00020"></a>00020 <a name="l00021"></a>00021 <span class="keyword">class </span>QwtRoundScaleDraw::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 class="code" href="class_qwt_round_scale_draw.html#79346d7551aa877667a104863f9a198e">center</a>(50, 50),<a name="l00026"></a>00026 <a class="code" href="class_qwt_round_scale_draw.html#2eb03d12749a44f7ca8a8ff92514dd56">radius</a>(50),<a name="l00027"></a>00027 minAngle(-135 * 16),<a name="l00028"></a>00028 maxAngle(135 * 16)<a name="l00029"></a>00029 {<a name="l00030"></a>00030 }<a name="l00031"></a>00031 <a name="l00032"></a>00032 QPoint <a class="code" href="class_qwt_round_scale_draw.html#79346d7551aa877667a104863f9a198e">center</a>;<a name="l00033"></a>00033 <span class="keywordtype">int</span> <a class="code" href="class_qwt_round_scale_draw.html#2eb03d12749a44f7ca8a8ff92514dd56">radius</a>; <a name="l00034"></a>00034 <a name="l00035"></a>00035 <span class="keywordtype">int</span> minAngle;<a name="l00036"></a>00036 <span class="keywordtype">int</span> maxAngle;<a name="l00037"></a>00037 };<a name="l00038"></a>00038 <a name="l00046"></a><a class="code" href="class_qwt_round_scale_draw.html#9c44d19488567825d826528b701587c8">00046</a> <a class="code" href="class_qwt_round_scale_draw.html#9c44d19488567825d826528b701587c8">QwtRoundScaleDraw::QwtRoundScaleDraw</a>()<a name="l00047"></a>00047 {<a name="l00048"></a>00048 d_data = <span class="keyword">new</span> QwtRoundScaleDraw::PrivateData;<a name="l00049"></a>00049 <a name="l00050"></a>00050 <a class="code" href="class_qwt_round_scale_draw.html#069d658989db2ad96f26b79a298f7d10">setRadius</a>(50);<a name="l00051"></a>00051 <a class="code" href="class_qwt_abstract_scale_draw.html#e7488eb63ad73a2e69acb29ff069c904">scaleMap</a>().<a class="code" href="class_qwt_scale_map.html#a9a63a0b2e4ff81b1df23d9f968cd5b8">setPaintInterval</a>(d_data->minAngle, d_data->maxAngle);<a name="l00052"></a>00052 }<a name="l00053"></a>00053 <a name="l00055"></a><a class="code" href="class_qwt_round_scale_draw.html#d6237d352a7004166dacfe644bfc4308">00055</a> <a class="code" href="class_qwt_round_scale_draw.html#9c44d19488567825d826528b701587c8">QwtRoundScaleDraw::QwtRoundScaleDraw</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> &other):<a name="l00056"></a>00056 <a class="code" href="class_qwt_abstract_scale_draw.html">QwtAbstractScaleDraw</a>(other)<a name="l00057"></a>00057 {<a name="l00058"></a>00058 d_data = <span class="keyword">new</span> QwtRoundScaleDraw::PrivateData(*other.<a class="code" href="class_qwt_round_scale_draw.html#f9ae2e1bce85893a9ea95679a114ae3b">d_data</a>);<a name="l00059"></a>00059 }<a name="l00060"></a>00060 <a name="l00061"></a>00061 <a name="l00063"></a><a class="code" href="class_qwt_round_scale_draw.html#81583432e629cd8a14524b05fabb4731">00063</a> <a class="code" href="class_qwt_round_scale_draw.html#81583432e629cd8a14524b05fabb4731">QwtRoundScaleDraw::~QwtRoundScaleDraw</a>()<a name="l00064"></a>00064 {<a name="l00065"></a>00065 <span class="keyword">delete</span> d_data;<a name="l00066"></a>00066 }<a name="l00067"></a>00067 <a name="l00069"></a><a class="code" href="class_qwt_round_scale_draw.html#dc6fc2de0c09ea6b70258a129fecac3a">00069</a> <a class="code" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> &<a class="code" href="class_qwt_round_scale_draw.html#dc6fc2de0c09ea6b70258a129fecac3a">QwtRoundScaleDraw::operator=</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> &other)<a name="l00070"></a>00070 {<a name="l00071"></a>00071 *(<a class="code" href="class_qwt_abstract_scale_draw.html">QwtAbstractScaleDraw</a>*)<span class="keyword">this</span> = (<span class="keyword">const</span> <a class="code" href="class_qwt_abstract_scale_draw.html">QwtAbstractScaleDraw</a> &)other;<a name="l00072"></a>00072 *d_data = *other.<a class="code" href="class_qwt_round_scale_draw.html#f9ae2e1bce85893a9ea95679a114ae3b">d_data</a>;<a name="l00073"></a>00073 <span class="keywordflow">return</span> *<span class="keyword">this</span>;<a name="l00074"></a>00074 }<a name="l00075"></a>00075 <a name="l00084"></a><a class="code" href="class_qwt_round_scale_draw.html#069d658989db2ad96f26b79a298f7d10">00084</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_round_scale_draw.html#069d658989db2ad96f26b79a298f7d10">QwtRoundScaleDraw::setRadius</a>(<span class="keywordtype">int</span> radius)<a name="l00085"></a>00085 {<a name="l00086"></a>00086 d_data->radius = radius;<a name="l00087"></a>00087 }<a name="l00088"></a>00088 <a name="l00096"></a><a class="code" href="class_qwt_round_scale_draw.html#2eb03d12749a44f7ca8a8ff92514dd56">00096</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_round_scale_draw.html#2eb03d12749a44f7ca8a8ff92514dd56">QwtRoundScaleDraw::radius</a>()<span class="keyword"> const</span><a name="l00097"></a>00097 <span class="keyword"></span>{<a name="l00098"></a>00098 <span class="keywordflow">return</span> d_data->radius;<a name="l00099"></a>00099 }<a name="l00100"></a>00100 <a name="l00107"></a><a class="code" href="class_qwt_round_scale_draw.html#536cdecd6046e4a8434e117c9cd5c180">00107</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_round_scale_draw.html#fe2226d225c3d7f50a85a80c86f5eb6e">QwtRoundScaleDraw::moveCenter</a>(<span class="keyword">const</span> QPoint &center)<a name="l00108"></a>00108 {<a name="l00109"></a>00109 d_data->center = center;<a name="l00110"></a>00110 }<a name="l00111"></a>00111 <a name="l00113"></a><a class="code" href="class_qwt_round_scale_draw.html#79346d7551aa877667a104863f9a198e">00113</a> QPoint <a class="code" href="class_qwt_round_scale_draw.html#79346d7551aa877667a104863f9a198e">QwtRoundScaleDraw::center</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_data->center;<a name="l00116"></a>00116 }<a name="l00117"></a>00117 <a name="l00135"></a><a class="code" href="class_qwt_round_scale_draw.html#5d85678fdb9fbb4d622425aab9ecc681">00135</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_round_scale_draw.html#5d85678fdb9fbb4d622425aab9ecc681">QwtRoundScaleDraw::setAngleRange</a>(<span class="keywordtype">double</span> angle1, <span class="keywordtype">double</span> angle2)<a name="l00136"></a>00136 {<a name="l00137"></a>00137 angle1 = qwtLim(angle1, -360.0, 360.0);<a name="l00138"></a>00138 angle2 = qwtLim(angle2, -360.0, 360.0);<a name="l00139"></a>00139 <a name="l00140"></a>00140 <span class="keywordtype">int</span> amin = qRound(qwtMin(angle1, angle2) * 16.0);<a name="l00141"></a>00141 <span class="keywordtype">int</span> amax = qRound(qwtMax(angle1, angle2) * 16.0); <a name="l00142"></a>00142 <a name="l00143"></a>00143 <span class="keywordflow">if</span> (amin == amax)<a name="l00144"></a>00144 {<a name="l00145"></a>00145 amin -= 1;<a name="l00146"></a>00146 amax += 1;<a name="l00147"></a>00147 }<a name="l00148"></a>00148 <a name="l00149"></a>00149 d_data->minAngle = amin;<a name="l00150"></a>00150 d_data->maxAngle = amax;<a name="l00151"></a>00151 <a class="code" href="class_qwt_abstract_scale_draw.html#e7488eb63ad73a2e69acb29ff069c904">scaleMap</a>().<a class="code" href="class_qwt_scale_map.html#a9a63a0b2e4ff81b1df23d9f968cd5b8">setPaintInterval</a>(d_data->minAngle, d_data->maxAngle);<a name="l00152"></a>00152 }<a name="l00153"></a>00153 <a name="l00162"></a><a class="code" href="class_qwt_round_scale_draw.html#a43bf3624c464727bb4f0cab28c3f6fe">00162</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_round_scale_draw.html#a43bf3624c464727bb4f0cab28c3f6fe">QwtRoundScaleDraw::drawLabel</a>(QPainter *painter, <span class="keywordtype">double</span> value)<span class="keyword"> const</span><a name="l00163"></a>00163 <span class="keyword"></span>{<a name="l00164"></a>00164 <span class="keyword">const</span> <a class="code" href="class_qwt_text.html">QwtText</a> <a class="code" href="class_qwt_abstract_scale_draw.html#4ff88bc827dd6c6ca9298de13483b61f">label</a> = <a class="code" href="class_qwt_abstract_scale_draw.html#5e703dcb115a51024f89f92e61c2c8d8">tickLabel</a>(painter->font(), value);<a name="l00165"></a>00165 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_abstract_scale_draw.html#4ff88bc827dd6c6ca9298de13483b61f">label</a>.<a class="code" href="class_qwt_text.html#25843b1120b648752ed5be2247ebe43f">isEmpty</a>() )<a name="l00166"></a>00166 <span class="keywordflow">return</span>; <a name="l00167"></a>00167 <a name="l00168"></a>00168 <span class="keyword">const</span> <span class="keywordtype">int</span> tval = <a class="code" href="class_qwt_abstract_scale_draw.html#9777f34effee2395dde92a42ef7902fd">map</a>().<a class="code" href="class_qwt_scale_map.html#1ddda39f41e137560e625a8c66c1d2e1">transform</a>(value);<a name="l00169"></a>00169 <span class="keywordflow">if</span> ((tval > d_data->minAngle + 359 * 16)<a name="l00170"></a>00170 || (tval < d_data->minAngle - 359 * 16))<a name="l00171"></a>00171 {<a name="l00172"></a>00172 <span class="keywordflow">return</span>; <a name="l00173"></a>00173 }⌨️ 快捷键说明
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