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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_legend.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_legend.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 <qapplication.h></span> <a name="l00013"></a>00013 <span class="preprocessor">#include <qmap.h></span> <a name="l00014"></a>00014 <span class="preprocessor">#if QT_VERSION >= 0x040000</span><a name="l00015"></a>00015 <span class="preprocessor"></span><span class="preprocessor">#include <qscrollbar.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 "qwt_math.h"</span><a name="l00018"></a>00018 <span class="preprocessor">#include "qwt_dyngrid_layout.h"</span><a name="l00019"></a>00019 <span class="preprocessor">#include "qwt_plot_item.h"</span><a name="l00020"></a>00020 <span class="preprocessor">#include "qwt_legend_item.h"</span><a name="l00021"></a>00021 <span class="preprocessor">#include "qwt_legend.h"</span><a name="l00022"></a>00022 <a name="l00023"></a>00023 <span class="keyword">class </span>QwtLegend::PrivateData<a name="l00024"></a>00024 {<a name="l00025"></a>00025 <span class="keyword">public</span>:<a name="l00026"></a>00026 <span class="keyword">class </span>LegendMap<a name="l00027"></a>00027 {<a name="l00028"></a>00028 <span class="keyword">public</span>:<a name="l00029"></a>00029 <span class="keywordtype">void</span> <a class="code" href="class_qwt_legend.html#54456bf97e80da5bfb4cca91367b8e15">insert</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_plot_item.html">QwtPlotItem</a> *, QWidget *);<a name="l00030"></a>00030 <a name="l00031"></a>00031 <span class="keywordtype">void</span> <a class="code" href="class_qwt_legend.html#330345b54cbe7be630d55ee9ad31b3b4">remove</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_plot_item.html">QwtPlotItem</a> *);<a name="l00032"></a>00032 <span class="keywordtype">void</span> <a class="code" href="class_qwt_legend.html#330345b54cbe7be630d55ee9ad31b3b4">remove</a>(QWidget *);<a name="l00033"></a>00033 <a name="l00034"></a>00034 <span class="keywordtype">void</span> <a class="code" href="class_qwt_legend.html#084177665b32798903176de57d962c6e">clear</a>();<a name="l00035"></a>00035 <a name="l00036"></a>00036 uint count() <span class="keyword">const</span>;<a name="l00037"></a>00037 <a name="l00038"></a>00038 <span class="keyword">inline</span> <span class="keyword">const</span> QWidget *<a class="code" href="class_qwt_legend.html#ae136e8199d5a3caf86a7767c1de186c">find</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_plot_item.html">QwtPlotItem</a> *) <span class="keyword">const</span>;<a name="l00039"></a>00039 <span class="keyword">inline</span> QWidget *<a class="code" href="class_qwt_legend.html#ae136e8199d5a3caf86a7767c1de186c">find</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_plot_item.html">QwtPlotItem</a> *);<a name="l00040"></a>00040 <a name="l00041"></a>00041 <span class="keyword">inline</span> <span class="keyword">const</span> <a class="code" href="class_qwt_plot_item.html">QwtPlotItem</a> *<a class="code" href="class_qwt_legend.html#ae136e8199d5a3caf86a7767c1de186c">find</a>(<span class="keyword">const</span> QWidget *) <span class="keyword">const</span>;<a name="l00042"></a>00042 <span class="keyword">inline</span> <a class="code" href="class_qwt_plot_item.html">QwtPlotItem</a> *<a class="code" href="class_qwt_legend.html#ae136e8199d5a3caf86a7767c1de186c">find</a>(<span class="keyword">const</span> QWidget *);<a name="l00043"></a>00043 <a name="l00044"></a>00044 <span class="keyword">const</span> QMap<QWidget *, const QwtPlotItem *> &widgetMap() <span class="keyword">const</span>;<a name="l00045"></a>00045 QMap<QWidget *, const QwtPlotItem *> &widgetMap();<a name="l00046"></a>00046 <a name="l00047"></a>00047 <span class="keyword">private</span>:<a name="l00048"></a>00048 QMap<QWidget *, const QwtPlotItem *> d_widgetMap;<a name="l00049"></a>00049 QMap<const QwtPlotItem *, QWidget *> d_itemMap;<a name="l00050"></a>00050 };<a name="l00051"></a>00051 <a name="l00052"></a>00052 <a class="code" href="class_qwt_legend.html#b216dd2dba9ebf6cb0ed2dd621a652e0">QwtLegend::LegendItemMode</a> <a class="code" href="class_qwt_legend.html#463c5542c6547c04050c912a5e500155">itemMode</a>;<a name="l00053"></a>00053 <a class="code" href="class_qwt_legend.html#898db0483371da91c694c34502f09ecd">QwtLegend::LegendDisplayPolicy</a> <a class="code" href="class_qwt_legend.html#a74ccc6083345a1517ffbb86356f7ba0">displayPolicy</a>;<a name="l00054"></a>00054 <span class="keywordtype">int</span> <a class="code" href="class_qwt_legend.html#a0d1126ccd9f65b0926ce7c802f74e6a">identifierMode</a>;<a name="l00055"></a>00055 <a name="l00056"></a>00056 LegendMap map;<a name="l00057"></a>00057 <a name="l00058"></a>00058 <span class="keyword">class </span>LegendView;<a name="l00059"></a>00059 LegendView *view;<a name="l00060"></a>00060 };<a name="l00061"></a>00061 <a name="l00062"></a>00062 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00063"></a>00063 <span class="preprocessor"></span><span class="preprocessor">#include <qscrollview.h></span><a name="l00064"></a>00064 <a name="l00065"></a>00065 <span class="keyword">class </span>QwtLegend::PrivateData::LegendView: <span class="keyword">public</span> QScrollView<a name="l00066"></a>00066 {<a name="l00067"></a>00067 <span class="keyword">public</span>:<a name="l00068"></a>00068 LegendView(QWidget *parent):<a name="l00069"></a>00069 QScrollView(parent)<a name="l00070"></a>00070 {<a name="l00071"></a>00071 setResizePolicy(Manual);<a name="l00072"></a>00072 <a name="l00073"></a>00073 viewport()->setBackgroundMode(Qt::NoBackground); <span class="comment">// Avoid flicker</span><a name="l00074"></a>00074 <a name="l00075"></a>00075 <a class="code" href="class_qwt_legend.html#a52edeceb553ae703516c984f34d7ab7">contentsWidget</a> = <span class="keyword">new</span> QWidget(viewport());<a name="l00076"></a>00076 <a name="l00077"></a>00077 addChild(<a class="code" href="class_qwt_legend.html#a52edeceb553ae703516c984f34d7ab7">contentsWidget</a>);<a name="l00078"></a>00078 }<a name="l00079"></a>00079 <a name="l00080"></a>00080 <span class="keywordtype">void</span> viewportResizeEvent(QResizeEvent *e)<a name="l00081"></a>00081 {<a name="l00082"></a>00082 QScrollView::viewportResizeEvent(e);<a name="l00083"></a>00083 <a name="l00084"></a>00084 <span class="comment">// It's not safe to update the layout now, because</span><a name="l00085"></a>00085 <span class="comment">// we are in an internal update of the scrollview framework.</span><a name="l00086"></a>00086 <span class="comment">// So we delay the update by posting a LayoutHint.</span><a name="l00087"></a>00087 <a name="l00088"></a>00088 QApplication::postEvent(<a class="code" href="class_qwt_legend.html#a52edeceb553ae703516c984f34d7ab7">contentsWidget</a>, <a name="l00089"></a>00089 <span class="keyword">new</span> QEvent(QEvent::LayoutHint));<a name="l00090"></a>00090 }<a name="l00091"></a>00091 <a name="l00092"></a>00092 QWidget *<a class="code" href="class_qwt_legend.html#a52edeceb553ae703516c984f34d7ab7">contentsWidget</a>;<a name="l00093"></a>00093 };<a name="l00094"></a>00094 <a name="l00095"></a>00095 <span class="preprocessor">#else // QT_VERSION >= 0x040000</span><a name="l00096"></a>00096 <span class="preprocessor"></span><a name="l00097"></a>00097 <span class="preprocessor">#include <qscrollarea.h></span><a name="l00098"></a>00098 <a name="l00099"></a>00099 <span class="keyword">class </span>QwtLegend::PrivateData::LegendView: <span class="keyword">public</span> QScrollArea<a name="l00100"></a>00100 {<a name="l00101"></a>00101 <span class="keyword">public</span>:<a name="l00102"></a>00102 LegendView(QWidget *parent):<a name="l00103"></a>00103 QScrollArea(parent)<a name="l00104"></a>00104 {<a name="l00105"></a>00105 <a class="code" href="class_qwt_legend.html#a52edeceb553ae703516c984f34d7ab7">contentsWidget</a> = <span class="keyword">new</span> QWidget(<span class="keyword">this</span>);<a name="l00106"></a>00106 <a name="l00107"></a>00107 setWidget(<a class="code" href="class_qwt_legend.html#a52edeceb553ae703516c984f34d7ab7">contentsWidget</a>);<a name="l00108"></a>00108 setWidgetResizable(<span class="keyword">false</span>);<a name="l00109"></a>00109 setFocusPolicy(Qt::NoFocus);<a name="l00110"></a>00110 }<a name="l00111"></a>00111 <a name="l00112"></a>00112 <span class="keyword">virtual</span> <span class="keywordtype">bool</span> viewportEvent(QEvent *e) <a name="l00113"></a>00113 {<a name="l00114"></a>00114 <span class="keywordtype">bool</span> ok = QScrollArea::viewportEvent(e);<a name="l00115"></a>00115 <a name="l00116"></a>00116 <span class="keywordflow">if</span> ( e->type() == QEvent::Resize )<a name="l00117"></a>00117 {<a name="l00118"></a>00118 QApplication::sendEvent(<a class="code" href="class_qwt_legend.html#a52edeceb553ae703516c984f34d7ab7">contentsWidget</a>, <a name="l00119"></a>00119 <span class="keyword">new</span> QEvent(QEvent::LayoutRequest));<a name="l00120"></a>00120 }<a name="l00121"></a>00121 <span class="keywordflow">return</span> ok;<a name="l00122"></a>00122 }<a name="l00123"></a>00123 <a name="l00124"></a>00124 QSize viewportSize(<span class="keywordtype">int</span> w, <span class="keywordtype">int</span> h)<span class="keyword"> const</span><a name="l00125"></a>00125 <span class="keyword"> </span>{<a name="l00126"></a>00126 <span class="keyword">const</span> <span class="keywordtype">int</span> sbHeight = <a class="code" href="class_qwt_legend.html#40dab44d47921da18a925e8fcc8d6870">horizontalScrollBar</a>()->sizeHint().height();<a name="l00127"></a>00127 <span class="keyword">const</span> <span class="keywordtype">int</span> sbWidth = <a class="code" href="class_qwt_legend.html#494758e3d7ab688c59989da52e7e97cf">verticalScrollBar</a>()->sizeHint().width();<a name="l00128"></a>00128 <a name="l00129"></a>00129 <span class="keyword">const</span> <span class="keywordtype">int</span> cw = contentsRect().width();<a name="l00130"></a>00130 <span class="keyword">const</span> <span class="keywordtype">int</span> ch = contentsRect().height();<a name="l00131"></a>00131 <a name="l00132"></a>00132 <span class="keywordtype">int</span> vw = cw;<a name="l00133"></a>00133 <span class="keywordtype">int</span> vh = ch;<a name="l00134"></a>00134 <a name="l00135"></a>00135 <span class="keywordflow">if</span> ( w > vw )<a name="l00136"></a>00136 vh -= sbHeight;<a name="l00137"></a>00137 <a name="l00138"></a>00138 <span class="keywordflow">if</span> ( h > vh )⌨️ 快捷键说明
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