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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_double_interval.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_double_interval.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 <qglobal.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 <qalgorithms.h></span><a name="l00013"></a>00013 <span class="preprocessor">#else</span><a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#include <qtl.h></span><a name="l00015"></a>00015 <span class="preprocessor">#endif</span><a name="l00016"></a>00016 <span class="preprocessor"></span><a name="l00017"></a>00017 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00018"></a>00018 <span class="preprocessor">#include "qwt_double_interval.h"</span><a name="l00019"></a>00019 <a name="l00028"></a><a class="code" href="class_qwt_double_interval.html#e4735252fef79bff0bda2dc61fb886c2">00028</a> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> <a class="code" href="class_qwt_double_interval.html#e4735252fef79bff0bda2dc61fb886c2">QwtDoubleInterval::normalized</a>()<span class="keyword"> const</span><a name="l00029"></a>00029 <span class="keyword"></span>{<a name="l00030"></a>00030 <span class="keywordflow">if</span> ( !<a class="code" href="class_qwt_double_interval.html#311402213e243b809008faaec00507d5">isValid</a>() )<a name="l00031"></a>00031 {<a name="l00032"></a>00032 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_interval.html#d07ae136fc65e6ad566b482274705cf2">QwtDoubleInterval</a>(d_maxValue, d_minValue);<a name="l00033"></a>00033 }<a name="l00034"></a>00034 <span class="keywordflow">else</span><a name="l00035"></a>00035 <span class="keywordflow">return</span> *<span class="keyword">this</span>;<a name="l00036"></a>00036 }<a name="l00037"></a>00037 <a name="l00043"></a><a class="code" href="class_qwt_double_interval.html#ad0ecc63759dd0cded108b111649601e">00043</a> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> <a class="code" href="class_qwt_double_interval.html#ad0ecc63759dd0cded108b111649601e">QwtDoubleInterval::inverted</a>()<span class="keyword"> const</span><a name="l00044"></a>00044 <span class="keyword"></span>{<a name="l00045"></a>00045 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_interval.html#d07ae136fc65e6ad566b482274705cf2">QwtDoubleInterval</a>(d_maxValue, d_minValue);<a name="l00046"></a>00046 }<a name="l00047"></a>00047 <a name="l00054"></a><a class="code" href="class_qwt_double_interval.html#8468036025b90b7b420722c2bd165fcb">00054</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_double_interval.html#8468036025b90b7b420722c2bd165fcb">QwtDoubleInterval::contains</a>(<span class="keywordtype">double</span> value)<span class="keyword"> const</span><a name="l00055"></a>00055 <span class="keyword"></span>{<a name="l00056"></a>00056 <span class="keywordflow">if</span> ( !<a class="code" href="class_qwt_double_interval.html#311402213e243b809008faaec00507d5">isValid</a>() )<a name="l00057"></a>00057 <span class="keywordflow">return</span> <span class="keyword">false</span>;<a name="l00058"></a>00058 <a name="l00059"></a>00059 <span class="keywordflow">return</span> (value >= d_minValue) && (value <= d_maxValue);<a name="l00060"></a>00060 }<a name="l00061"></a>00061 <a name="l00063"></a><a class="code" href="class_qwt_double_interval.html#f6f3a0baf79d261237fb4aca2f099716">00063</a> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> <a class="code" href="class_qwt_double_interval.html#f6f3a0baf79d261237fb4aca2f099716">QwtDoubleInterval::unite</a>(<a name="l00064"></a>00064 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval)<span class="keyword"> const</span><a name="l00065"></a>00065 <span class="keyword"></span>{<a name="l00066"></a>00066 <span class="keywordflow">if</span> ( !<a class="code" href="class_qwt_double_interval.html#311402213e243b809008faaec00507d5">isValid</a>() )<a name="l00067"></a>00067 {<a name="l00068"></a>00068 <span class="keywordflow">if</span> ( !interval.<a class="code" href="class_qwt_double_interval.html#311402213e243b809008faaec00507d5">isValid</a>() )<a name="l00069"></a>00069 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_interval.html#d07ae136fc65e6ad566b482274705cf2">QwtDoubleInterval</a>();<a name="l00070"></a>00070 <span class="keywordflow">else</span><a name="l00071"></a>00071 <span class="keywordflow">return</span> interval;<a name="l00072"></a>00072 }<a name="l00073"></a>00073 <span class="keywordflow">if</span> ( !interval.<a class="code" href="class_qwt_double_interval.html#311402213e243b809008faaec00507d5">isValid</a>() )<a name="l00074"></a>00074 <span class="keywordflow">return</span> *<span class="keyword">this</span>;<a name="l00075"></a>00075 <a name="l00076"></a>00076 <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_interval.html#2d7d56e81ee75911f176c94f6aaf4b8b">minValue</a> = qwtMin(d_minValue, interval.<a class="code" href="class_qwt_double_interval.html#2d7d56e81ee75911f176c94f6aaf4b8b">minValue</a>());<a name="l00077"></a>00077 <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_interval.html#8fd8629d76f24d5494e59458cd79c4e2">maxValue</a> = qwtMax(d_maxValue, interval.<a class="code" href="class_qwt_double_interval.html#8fd8629d76f24d5494e59458cd79c4e2">maxValue</a>());<a name="l00078"></a>00078 <a name="l00079"></a>00079 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_interval.html#d07ae136fc65e6ad566b482274705cf2">QwtDoubleInterval</a>(minValue, maxValue);<a name="l00080"></a>00080 }<a name="l00081"></a>00081 <a name="l00083"></a><a class="code" href="class_qwt_double_interval.html#52488d71ecc5dee5ea0a4106bd7901f4">00083</a> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> <a class="code" href="class_qwt_double_interval.html#52488d71ecc5dee5ea0a4106bd7901f4">QwtDoubleInterval::intersect</a>(<a name="l00084"></a>00084 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval)<span class="keyword"> const</span><a name="l00085"></a>00085 <span class="keyword"></span>{<a name="l00086"></a>00086 <span class="keywordflow">if</span> ( !interval.<a class="code" href="class_qwt_double_interval.html#311402213e243b809008faaec00507d5">isValid</a>() || !<a class="code" href="class_qwt_double_interval.html#311402213e243b809008faaec00507d5">isValid</a>() )<a name="l00087"></a>00087 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_interval.html#d07ae136fc65e6ad566b482274705cf2">QwtDoubleInterval</a>();<a name="l00088"></a>00088 <a name="l00089"></a>00089 <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> i1 = *<span class="keyword">this</span>;<a name="l00090"></a>00090 <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> i2 = interval;<a name="l00091"></a>00091 ⌨️ 快捷键说明
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