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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_dyngrid_layout.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_dyngrid_layout.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 <qwidget.h></span><a name="l00011"></a>00011 <span class="preprocessor">#include "qwt_dyngrid_layout.h"</span><a name="l00012"></a>00012 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00013"></a>00013 <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 <qvaluelist.h></span><a name="l00016"></a>00016 <span class="preprocessor">#else</span><a name="l00017"></a>00017 <span class="preprocessor"></span><span class="preprocessor">#include <qlist.h></span><a name="l00018"></a>00018 <span class="preprocessor">#endif</span><a name="l00019"></a>00019 <span class="preprocessor"></span><a name="l00020"></a>00020 <span class="keyword">class </span>QwtDynGridLayout::PrivateData<a name="l00021"></a>00021 {<a name="l00022"></a>00022 <span class="keyword">public</span>:<a name="l00023"></a>00023 <a name="l00024"></a>00024 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00025"></a>00025 <span class="preprocessor"></span> <span class="keyword">class </span>LayoutIterator: <span class="keyword">public</span> QGLayoutIterator<a name="l00026"></a>00026 {<a name="l00027"></a>00027 <span class="keyword">public</span>:<a name="l00028"></a>00028 LayoutIterator(PrivateData *data):<a name="l00029"></a>00029 d_data(data) <a name="l00030"></a>00030 {<a name="l00031"></a>00031 d_iterator = d_data->itemList.begin();<a name="l00032"></a>00032 }<a name="l00033"></a>00033 <a name="l00034"></a>00034 <span class="keyword">virtual</span> QLayoutItem *current()<a name="l00035"></a>00035 { <a name="l00036"></a>00036 <span class="keywordflow">if</span> (d_iterator == d_data->itemList.end())<a name="l00037"></a>00037 <span class="keywordflow">return</span> NULL;<a name="l00038"></a>00038 <a name="l00039"></a>00039 <span class="keywordflow">return</span> *d_iterator;<a name="l00040"></a>00040 }<a name="l00041"></a>00041 <a name="l00042"></a>00042 <span class="keyword">virtual</span> QLayoutItem *next()<a name="l00043"></a>00043 { <a name="l00044"></a>00044 <span class="keywordflow">if</span> (d_iterator == d_data->itemList.end())<a name="l00045"></a>00045 <span class="keywordflow">return</span> NULL;<a name="l00046"></a>00046 <a name="l00047"></a>00047 d_iterator++;<a name="l00048"></a>00048 <span class="keywordflow">if</span> (d_iterator == d_data->itemList.end())<a name="l00049"></a>00049 <span class="keywordflow">return</span> NULL;<a name="l00050"></a>00050 <a name="l00051"></a>00051 <span class="keywordflow">return</span> *d_iterator;<a name="l00052"></a>00052 }<a name="l00053"></a>00053 <a name="l00054"></a>00054 <span class="keyword">virtual</span> QLayoutItem *takeCurrent()<a name="l00055"></a>00055 { <a name="l00056"></a>00056 <span class="keywordflow">if</span> ( d_iterator == d_data->itemList.end() )<a name="l00057"></a>00057 <span class="keywordflow">return</span> NULL;<a name="l00058"></a>00058 <a name="l00059"></a>00059 QLayoutItem *item = *d_iterator;<a name="l00060"></a>00060 <a name="l00061"></a>00061 d_data->isDirty = <span class="keyword">true</span>;<a name="l00062"></a>00062 d_iterator = d_data->itemList.remove(d_iterator);<a name="l00063"></a>00063 <span class="keywordflow">return</span> item;<a name="l00064"></a>00064 }<a name="l00065"></a>00065 <a name="l00066"></a>00066 <span class="keyword">private</span>:<a name="l00067"></a>00067 <a name="l00068"></a>00068 QValueListIterator<QLayoutItem*> d_iterator;<a name="l00069"></a>00069 QwtDynGridLayout::PrivateData *d_data;<a name="l00070"></a>00070 };<a name="l00071"></a>00071 <span class="preprocessor">#endif</span><a name="l00072"></a>00072 <span class="preprocessor"></span><a name="l00073"></a>00073 PrivateData():<a name="l00074"></a>00074 isDirty(true)<a name="l00075"></a>00075 {<a name="l00076"></a>00076 }<a name="l00077"></a>00077 <a name="l00078"></a>00078 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00079"></a>00079 <span class="preprocessor"></span> <span class="keyword">typedef</span> QValueList<QLayoutItem*> LayoutItemList;<a name="l00080"></a>00080 <span class="preprocessor">#else</span><a name="l00081"></a>00081 <span class="preprocessor"></span> <span class="keyword">typedef</span> QList<QLayoutItem*> LayoutItemList;<a name="l00082"></a>00082 <span class="preprocessor">#endif</span><a name="l00083"></a>00083 <span class="preprocessor"></span><a name="l00084"></a>00084 <span class="keyword">mutable</span> LayoutItemList itemList;<a name="l00085"></a>00085 <a name="l00086"></a>00086 uint <a class="code" href="class_qwt_dyn_grid_layout.html#6ffaad457d8c9b4d423c23fb6b433299">maxCols</a>;<a name="l00087"></a>00087 uint <a class="code" href="class_qwt_dyn_grid_layout.html#d3f387078e5e78b66b452c72e99923c2">numRows</a>;<a name="l00088"></a>00088 uint <a class="code" href="class_qwt_dyn_grid_layout.html#4678cd0f67c332162c266ac9661b5db6">numCols</a>;<a name="l00089"></a>00089 <a name="l00090"></a>00090 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00091"></a>00091 <span class="preprocessor"></span> QSizePolicy::ExpandData expanding;<a name="l00092"></a>00092 <span class="preprocessor">#else</span><a name="l00093"></a>00093 <span class="preprocessor"></span> Qt::Orientations expanding;<a name="l00094"></a>00094 <span class="preprocessor">#endif</span><a name="l00095"></a>00095 <span class="preprocessor"></span><a name="l00096"></a>00096 <span class="keywordtype">bool</span> isDirty;<a name="l00097"></a>00097 QwtArray<QSize> itemSizeHints;<a name="l00098"></a>00098 };<a name="l00099"></a>00099 <a name="l00100"></a>00100 <a name="l00107"></a><a class="code" href="class_qwt_dyn_grid_layout.html#2079ddcba8442ef9f386556dd9cb8cc6">00107</a> <a class="code" href="class_qwt_dyn_grid_layout.html#2079ddcba8442ef9f386556dd9cb8cc6">QwtDynGridLayout::QwtDynGridLayout</a>(QWidget *parent, <a name="l00108"></a>00108 <span class="keywordtype">int</span> margin, <span class="keywordtype">int</span> spacing):<a name="l00109"></a>00109 QLayout(parent)<a name="l00110"></a>00110 {<a name="l00111"></a>00111 init();<a name="l00112"></a>00112 <a name="l00113"></a>00113 setSpacing(spacing);<a name="l00114"></a>00114 setMargin(margin);<a name="l00115"></a>00115 }<a name="l00116"></a>00116 <a name="l00117"></a>00117 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00118"></a>00118 <span class="preprocessor"></span><a name="l00122"></a>00122 <a class="code" href="class_qwt_dyn_grid_layout.html#2079ddcba8442ef9f386556dd9cb8cc6">QwtDynGridLayout::QwtDynGridLayout</a>(QLayout *parent, <span class="keywordtype">int</span> spacing):<a name="l00123"></a>00123 QLayout(parent, spacing)<a name="l00124"></a>00124 {<a name="l00125"></a>00125 init();<a name="l00126"></a>00126 }<a name="l00127"></a>00127 <span class="preprocessor">#endif</span><a name="l00128"></a>00128 <span class="preprocessor"></span><a name="l00133"></a><a class="code" href="class_qwt_dyn_grid_layout.html#05d45c0928702e37da3497626b0f7c93">00133</a> <a class="code" href="class_qwt_dyn_grid_layout.html#2079ddcba8442ef9f386556dd9cb8cc6">QwtDynGridLayout::QwtDynGridLayout</a>(<span class="keywordtype">int</span> spacing)<a name="l00134"></a>00134 {<a name="l00135"></a>00135 init();<a name="l00136"></a>00136 setSpacing(spacing);<a name="l00137"></a>00137 }<a name="l00138"></a>00138 <a name="l00142"></a>00142 <span class="keywordtype">void</span> QwtDynGridLayout::init()<a name="l00143"></a>00143 {<a name="l00144"></a>00144 d_data = <span class="keyword">new</span> QwtDynGridLayout::PrivateData;<a name="l00145"></a>00145 d_data->maxCols = d_data->numRows <a name="l00146"></a>00146 = d_data->numCols = 0;<a name="l00147"></a>00147 ⌨️ 快捷键说明
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