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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_plot_magnifier.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_plot_magnifier.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 <qevent.h></span><a name="l00014"></a>00014 <span class="preprocessor">#include "qwt_plot.h"</span><a name="l00015"></a>00015 <span class="preprocessor">#include "qwt_plot_canvas.h"</span><a name="l00016"></a>00016 <span class="preprocessor">#include "qwt_scale_div.h"</span><a name="l00017"></a>00017 <span class="preprocessor">#include "qwt_plot_magnifier.h"</span><a name="l00018"></a>00018 <a name="l00019"></a>00019 <span class="keyword">class </span>QwtPlotMagnifier::PrivateData<a name="l00020"></a>00020 {<a name="l00021"></a>00021 <span class="keyword">public</span>:<a name="l00022"></a>00022 PrivateData():<a name="l00023"></a>00023 <a class="code" href="class_qwt_plot_magnifier.html#e666487b1a1a000aa7e213fa0aceb6ad">isEnabled</a>(false),<a name="l00024"></a>00024 <a class="code" href="class_qwt_plot_magnifier.html#2f5e0cbafaf153791d51f4d3fc16c3ed">wheelFactor</a>(0.9),<a name="l00025"></a>00025 <a class="code" href="class_qwt_plot_magnifier.html#0607f861a284480a15d1964f129d327f">wheelButtonState</a>(Qt::NoButton),<a name="l00026"></a>00026 <a class="code" href="class_qwt_plot_magnifier.html#fb7b250bfe7d595950f038f86c7d2f08">mouseFactor</a>(0.95),<a name="l00027"></a>00027 mouseButton(Qt::RightButton),<a name="l00028"></a>00028 mouseButtonState(Qt::NoButton),<a name="l00029"></a>00029 <a class="code" href="class_qwt_plot_magnifier.html#49e7a757a1238e8fd0f7647928da347b">keyFactor</a>(0.9),<a name="l00030"></a>00030 zoomInKey(Qt::Key_Plus),<a name="l00031"></a>00031 zoomOutKey(Qt::Key_Minus),<a name="l00032"></a>00032 #if QT_VERSION < 0x040000<a name="l00033"></a>00033 zoomInKeyButtonState(Qt::NoButton),<a name="l00034"></a>00034 zoomOutKeyButtonState(Qt::NoButton),<a name="l00035"></a>00035 #else<a name="l00036"></a>00036 zoomInKeyButtonState(Qt::NoModifier),<a name="l00037"></a>00037 zoomOutKeyButtonState(Qt::NoModifier),<a name="l00038"></a>00038 #endif<a name="l00039"></a>00039 mousePressed(false)<a name="l00040"></a>00040 {<a name="l00041"></a>00041 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> axis = 0; axis < QwtPlot::axisCnt; axis++ )<a name="l00042"></a>00042 <a class="code" href="class_qwt_plot_magnifier.html#cb4c33465bdd3c19c07ea3fa836c1f8d">isAxisEnabled</a>[axis] = <span class="keyword">true</span>;<a name="l00043"></a>00043 }<a name="l00044"></a>00044 <a name="l00045"></a>00045 <span class="keywordtype">bool</span> <a class="code" href="class_qwt_plot_magnifier.html#e666487b1a1a000aa7e213fa0aceb6ad">isEnabled</a>;<a name="l00046"></a>00046 <a name="l00047"></a>00047 <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_magnifier.html#2f5e0cbafaf153791d51f4d3fc16c3ed">wheelFactor</a>;<a name="l00048"></a>00048 <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_magnifier.html#0607f861a284480a15d1964f129d327f">wheelButtonState</a>;<a name="l00049"></a>00049 <a name="l00050"></a>00050 <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_magnifier.html#fb7b250bfe7d595950f038f86c7d2f08">mouseFactor</a>;<a name="l00051"></a>00051 <span class="keywordtype">int</span> mouseButton;<a name="l00052"></a>00052 <span class="keywordtype">int</span> mouseButtonState;<a name="l00053"></a>00053 <a name="l00054"></a>00054 <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_magnifier.html#49e7a757a1238e8fd0f7647928da347b">keyFactor</a>;<a name="l00055"></a>00055 <span class="keywordtype">int</span> zoomInKey;<a name="l00056"></a>00056 <span class="keywordtype">int</span> zoomOutKey;<a name="l00057"></a>00057 <span class="keywordtype">int</span> zoomInKeyButtonState;<a name="l00058"></a>00058 <span class="keywordtype">int</span> zoomOutKeyButtonState;<a name="l00059"></a>00059 <a name="l00060"></a>00060 <span class="keywordtype">bool</span> <a class="code" href="class_qwt_plot_magnifier.html#cb4c33465bdd3c19c07ea3fa836c1f8d">isAxisEnabled</a>[QwtPlot::axisCnt];<a name="l00061"></a>00061 <a name="l00062"></a>00062 <span class="keywordtype">bool</span> mousePressed;<a name="l00063"></a>00063 <span class="keywordtype">bool</span> hasMouseTracking;<a name="l00064"></a>00064 QPoint mousePos;<a name="l00065"></a>00065 };<a name="l00066"></a>00066 <a name="l00067"></a><a class="code" href="class_qwt_plot_magnifier.html#b60fc56ac5a3f2e9ab879f0a9be0fdb9">00067</a> <a class="code" href="class_qwt_plot_magnifier.html#b60fc56ac5a3f2e9ab879f0a9be0fdb9">QwtPlotMagnifier::QwtPlotMagnifier</a>(<a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *<a class="code" href="class_qwt_plot_magnifier.html#947d94f9517bb096851738b5c2bf4b7d">canvas</a>):<a name="l00068"></a>00068 QObject(<a class="code" href="class_qwt_plot_magnifier.html#947d94f9517bb096851738b5c2bf4b7d">canvas</a>)<a name="l00069"></a>00069 {<a name="l00070"></a>00070 d_data = <span class="keyword">new</span> PrivateData();<a name="l00071"></a>00071 <a class="code" href="class_qwt_plot_magnifier.html#634c991e066749954ae9dcd6ad764cc1">setEnabled</a>(<span class="keyword">true</span>);<a name="l00072"></a>00072 }<a name="l00073"></a>00073 <a name="l00074"></a><a class="code" href="class_qwt_plot_magnifier.html#38c0508241885ea49542cc0f11c740df">00074</a> <a class="code" href="class_qwt_plot_magnifier.html#38c0508241885ea49542cc0f11c740df">QwtPlotMagnifier::~QwtPlotMagnifier</a>()<a name="l00075"></a>00075 {<a name="l00076"></a>00076 <span class="keyword">delete</span> d_data;<a name="l00077"></a>00077 }<a name="l00078"></a>00078 <a name="l00079"></a><a class="code" href="class_qwt_plot_magnifier.html#634c991e066749954ae9dcd6ad764cc1">00079</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_magnifier.html#634c991e066749954ae9dcd6ad764cc1">QwtPlotMagnifier::setEnabled</a>(<span class="keywordtype">bool</span> on)<a name="l00080"></a>00080 {<a name="l00081"></a>00081 <span class="keywordflow">if</span> ( d_data->isEnabled != on )<a name="l00082"></a>00082 {<a name="l00083"></a>00083 d_data->isEnabled = on;<a name="l00084"></a>00084 <a name="l00085"></a>00085 QObject *o = parent();<a name="l00086"></a>00086 <span class="keywordflow">if</span> ( o )<a name="l00087"></a>00087 {<a name="l00088"></a>00088 <span class="keywordflow">if</span> ( d_data->isEnabled )<a name="l00089"></a>00089 o->installEventFilter(<span class="keyword">this</span>);<a name="l00090"></a>00090 <span class="keywordflow">else</span><a name="l00091"></a>00091 o->removeEventFilter(<span class="keyword">this</span>);<a name="l00092"></a>00092 }<a name="l00093"></a>00093 }<a name="l00094"></a>00094 }<a name="l00095"></a>00095 <a name="l00096"></a><a class="code" href="class_qwt_plot_magnifier.html#e666487b1a1a000aa7e213fa0aceb6ad">00096</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_plot_magnifier.html#e666487b1a1a000aa7e213fa0aceb6ad">QwtPlotMagnifier::isEnabled</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->isEnabled;<a name="l00099"></a>00099 }<a name="l00100"></a>00100 <a name="l00101"></a><a class="code" href="class_qwt_plot_magnifier.html#1244337234720e4894956488071481c6">00101</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_magnifier.html#1244337234720e4894956488071481c6">QwtPlotMagnifier::setWheelFactor</a>(<span class="keywordtype">double</span> factor)<a name="l00102"></a>00102 {<a name="l00103"></a>00103 d_data->wheelFactor = factor;<a name="l00104"></a>00104 }<a name="l00105"></a>00105 <a name="l00106"></a><a class="code" href="class_qwt_plot_magnifier.html#2f5e0cbafaf153791d51f4d3fc16c3ed">00106</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_magnifier.html#2f5e0cbafaf153791d51f4d3fc16c3ed">QwtPlotMagnifier::wheelFactor</a>()<span class="keyword"> const</span><a name="l00107"></a>00107 <span class="keyword"></span>{<a name="l00108"></a>00108 <span class="keywordflow">return</span> d_data->wheelFactor;<a name="l00109"></a>00109 }<a name="l00110"></a>00110 <a name="l00111"></a><a class="code" href="class_qwt_plot_magnifier.html#f22437a472e8d1ca5449e4e9d84b7803">00111</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_magnifier.html#f22437a472e8d1ca5449e4e9d84b7803">QwtPlotMagnifier::setWheelButtonState</a>(<span class="keywordtype">int</span> buttonState)<a name="l00112"></a>00112 {<a name="l00113"></a>00113 d_data->wheelButtonState = buttonState;<a name="l00114"></a>00114 }<a name="l00115"></a>00115 <a name="l00116"></a><a class="code" href="class_qwt_plot_magnifier.html#0607f861a284480a15d1964f129d327f">00116</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_magnifier.html#0607f861a284480a15d1964f129d327f">QwtPlotMagnifier::wheelButtonState</a>()<span class="keyword"> const</span><a name="l00117"></a>00117 <span class="keyword"></span>{<a name="l00118"></a>00118 <span class="keywordflow">return</span> d_data->wheelButtonState;<a name="l00119"></a>00119 }<a name="l00120"></a>00120 <a name="l00121"></a><a class="code" href="class_qwt_plot_magnifier.html#94fb6f7f2e4c21df07cd2f14d47f3e61">00121</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_magnifier.html#94fb6f7f2e4c21df07cd2f14d47f3e61">QwtPlotMagnifier::setMouseFactor</a>(<span class="keywordtype">double</span> factor)<a name="l00122"></a>00122 {<a name="l00123"></a>00123 d_data->mouseFactor = factor;<a name="l00124"></a>00124 }<a name="l00125"></a>00125 <a name="l00126"></a><a class="code" href="class_qwt_plot_magnifier.html#fb7b250bfe7d595950f038f86c7d2f08">00126</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_magnifier.html#fb7b250bfe7d595950f038f86c7d2f08">QwtPlotMagnifier::mouseFactor</a>()<span class="keyword"> const</span>⌨️ 快捷键说明
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