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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_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_plot_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="comment">// vim: expandtab</span><a name="l00011"></a>00011 <a name="l00012"></a>00012 <span class="preprocessor">#include <qscrollbar.h></span><a name="l00013"></a>00013 <span class="preprocessor">#include "qwt_rect.h"</span><a name="l00014"></a>00014 <span class="preprocessor">#include "qwt_text.h"</span><a name="l00015"></a>00015 <span class="preprocessor">#include "qwt_text_label.h"</span><a name="l00016"></a>00016 <span class="preprocessor">#include "qwt_plot_canvas.h"</span><a name="l00017"></a>00017 <span class="preprocessor">#include "qwt_scale_widget.h"</span><a name="l00018"></a>00018 <span class="preprocessor">#include "qwt_legend.h"</span><a name="l00019"></a>00019 <span class="preprocessor">#include "qwt_plot_layout.h"</span><a name="l00020"></a>00020 <a name="l00021"></a>00021 <span class="keyword">class </span>QwtPlotLayout::LayoutData<a name="l00022"></a>00022 {<a name="l00023"></a>00023 <span class="keyword">public</span>:<a name="l00024"></a>00024 <span class="keywordtype">void</span> init(<span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *, <span class="keyword">const</span> QRect &rect);<a name="l00025"></a>00025 <a name="l00026"></a>00026 <span class="keyword">struct </span>t_legendData<a name="l00027"></a>00027 {<a name="l00028"></a>00028 <span class="keywordtype">int</span> frameWidth;<a name="l00029"></a>00029 <span class="keywordtype">int</span> vScrollBarWidth;<a name="l00030"></a>00030 <span class="keywordtype">int</span> hScrollBarHeight;<a name="l00031"></a>00031 QSize hint;<a name="l00032"></a>00032 } legend;<a name="l00033"></a>00033 <a name="l00034"></a>00034 <span class="keyword">struct </span>t_titleData<a name="l00035"></a>00035 {<a name="l00036"></a>00036 <a class="code" href="class_qwt_text.html">QwtText</a> text;<a name="l00037"></a>00037 <span class="keywordtype">int</span> frameWidth;<a name="l00038"></a>00038 } title;<a name="l00039"></a>00039 <a name="l00040"></a>00040 <span class="keyword">struct </span>t_scaleData<a name="l00041"></a>00041 {<a name="l00042"></a>00042 <span class="keywordtype">bool</span> isEnabled;<a name="l00043"></a>00043 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_widget.html">QwtScaleWidget</a> *scaleWidget;<a name="l00044"></a>00044 QFont scaleFont;<a name="l00045"></a>00045 <span class="keywordtype">int</span> start;<a name="l00046"></a>00046 <span class="keywordtype">int</span> end;<a name="l00047"></a>00047 <span class="keywordtype">int</span> baseLineOffset;<a name="l00048"></a>00048 <span class="keywordtype">int</span> tickOffset; <a name="l00049"></a>00049 <span class="keywordtype">int</span> dimWithoutTitle;<a name="l00050"></a>00050 } scale[QwtPlot::axisCnt];<a name="l00051"></a>00051 <a name="l00052"></a>00052 <span class="keyword">struct </span>t_canvasData<a name="l00053"></a>00053 {<a name="l00054"></a>00054 <span class="keywordtype">int</span> frameWidth;<a name="l00055"></a>00055 } canvas;<a name="l00056"></a>00056 };<a name="l00057"></a>00057 <a name="l00058"></a>00058 <span class="comment">/*</span><a name="l00059"></a>00059 <span class="comment"> Extract all layout relevant data from the plot components</span><a name="l00060"></a>00060 <span class="comment">*/</span><a name="l00061"></a>00061 <a name="l00062"></a>00062 <span class="keywordtype">void</span> QwtPlotLayout::LayoutData::init(<span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *plot, <span class="keyword">const</span> QRect &rect)<a name="l00063"></a>00063 {<a name="l00064"></a>00064 <span class="comment">// legend</span><a name="l00065"></a>00065 <a name="l00066"></a>00066 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_plot_item.html#4c99653a14a49ad94d466168d06e97b9">plot</a>-><a class="code" href="class_qwt_plot.html#9156b14a6f67f6279a16fea063ce1d14">plotLayout</a>()-><a class="code" href="class_qwt_plot_layout.html#6351a18b76e22d9e83d682d203599afc">legendPosition</a>() != QwtPlot::ExternalLegend <a name="l00067"></a>00067 && <a class="code" href="class_qwt_plot_item.html#4c99653a14a49ad94d466168d06e97b9">plot</a>-><a class="code" href="class_qwt_plot.html#ab1f2cf0e567e09a4c4bce3181c03ba0">legend</a>() )<a name="l00068"></a>00068 {<a name="l00069"></a>00069 legend.frameWidth = <a class="code" href="class_qwt_plot_item.html#4c99653a14a49ad94d466168d06e97b9">plot</a>-><a class="code" href="class_qwt_plot.html#ab1f2cf0e567e09a4c4bce3181c03ba0">legend</a>()->frameWidth();<a name="l00070"></a>00070 legend.vScrollBarWidth = <a name="l00071"></a>00071 <a class="code" href="class_qwt_plot_item.html#4c99653a14a49ad94d466168d06e97b9">plot</a>-><a class="code" href="class_qwt_plot.html#ab1f2cf0e567e09a4c4bce3181c03ba0">legend</a>()-><a class="code" href="class_qwt_legend.html#494758e3d7ab688c59989da52e7e97cf">verticalScrollBar</a>()->sizeHint().width();<a name="l00072"></a>00072 legend.hScrollBarHeight = <a name="l00073"></a>00073 <a class="code" href="class_qwt_plot_item.html#4c99653a14a49ad94d466168d06e97b9">plot</a>-><a class="code" href="class_qwt_plot.html#ab1f2cf0e567e09a4c4bce3181c03ba0">legend</a>()-><a class="code" href="class_qwt_legend.html#40dab44d47921da18a925e8fcc8d6870">horizontalScrollBar</a>()->sizeHint().height();<a name="l00074"></a>00074 <a name="l00075"></a>00075 <span class="keyword">const</span> QSize hint = <a class="code" href="class_qwt_plot_item.html#4c99653a14a49ad94d466168d06e97b9">plot</a>-><a class="code" href="class_qwt_plot.html#ab1f2cf0e567e09a4c4bce3181c03ba0">legend</a>()-><a class="code" href="class_qwt_legend.html#2517a7d9d78ab7a3892125ecf755f33f">sizeHint</a>();<a name="l00076"></a>00076 <a name="l00077"></a>00077 <span class="keywordtype">int</span> w = qwtMin(hint.width(), rect.width());<a name="l00078"></a>00078 <span class="keywordtype">int</span> h = <a class="code" href="class_qwt_plot_item.html#4c99653a14a49ad94d466168d06e97b9">plot</a>-><a class="code" href="class_qwt_plot.html#ab1f2cf0e567e09a4c4bce3181c03ba0">legend</a>()-><a class="code" href="class_qwt_legend.html#273ec258209c42f57b154ff4da61e1d0">heightForWidth</a>(w);<a name="l00079"></a>00079 <span class="keywordflow">if</span> ( h == 0 )<a name="l00080"></a>00080 h = hint.height();<a name="l00081"></a>00081 <a name="l00082"></a>00082 <span class="keywordflow">if</span> ( h > rect.height() )<a name="l00083"></a>00083 w += legend.vScrollBarWidth;<a name="l00084"></a>00084 <a name="l00085"></a>00085 legend.hint = QSize(w, h);<a name="l00086"></a>00086 }<a name="l00087"></a>00087 <a name="l00088"></a>00088 <span class="comment">// title </span><a name="l00089"></a>00089 <a name="l00090"></a>00090 title.frameWidth = 0;<a name="l00091"></a>00091 title.text = <a class="code" href="class_qwt_text.html">QwtText</a>();<a name="l00092"></a>00092 <a name="l00093"></a>00093 <span class="keywordflow">if</span> (plot-><a class="code" href="class_qwt_plot.html#c39356b86ed70ebf256a8ae964910206">titleLabel</a>() )<a name="l00094"></a>00094 {<a name="l00095"></a>00095 <span class="keyword">const</span> <a class="code" href="class_qwt_text_label.html">QwtTextLabel</a> *label = plot-><a class="code" href="class_qwt_plot.html#c39356b86ed70ebf256a8ae964910206">titleLabel</a>();<a name="l00096"></a>00096 title.<a class="code" href="class_qwt_text_label.html#6ff4f9a87e11594740f312c8522f933e">text</a> = label-><a class="code" href="class_qwt_text.html#15a42a83153f82bab8cfc283d090d736">text</a>(); <a name="l00097"></a>00097 <span class="keywordflow">if</span> ( !(title.text.testPaintAttribute(QwtText::PaintUsingTextFont)) )<a name="l00098"></a>00098 title.text.setFont(label->font());<a name="l00099"></a>00099 <a name="l00100"></a>00100 title.frameWidth = plot-><a class="code" href="class_qwt_plot.html#c39356b86ed70ebf256a8ae964910206">titleLabel</a>()->frameWidth();<a name="l00101"></a>00101 }<a name="l00102"></a>00102 <a name="l00103"></a>00103 <span class="comment">// scales </span><a name="l00104"></a>00104 <a name="l00105"></a>00105 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> axis = 0; axis < QwtPlot::axisCnt; axis++ )<a name="l00106"></a>00106 {<a name="l00107"></a>00107 <span class="keywordflow">if</span> ( plot-><a class="code" href="class_qwt_plot.html#ac5107a1ec8836b53f084a5b1bb8cc43">axisEnabled</a>(axis) )<a name="l00108"></a>00108 {<a name="l00109"></a>00109 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_widget.html">QwtScaleWidget</a> *scaleWidget = plot-><a class="code" href="class_qwt_plot.html#6b495d9b17962be6e098026441a1f7b8">axisWidget</a>(axis);<a name="l00110"></a>00110 <a name="l00111"></a>00111 scale[axis].isEnabled = <span class="keyword">true</span>;<a name="l00112"></a>00112 <a name="l00113"></a>00113 scale[axis].scaleWidget = scaleWidget;<a name="l00114"></a>00114 <a name="l00115"></a>00115 scale[axis].scaleFont = scaleWidget->font();<a name="l00116"></a>00116 <a name="l00117"></a>00117 scale[axis].start = scaleWidget-><a class="code" href="class_qwt_scale_widget.html#b82bb290d685dfaec3894f5892f04ef9">startBorderDist</a>();<a name="l00118"></a>00118 scale[axis].end = scaleWidget->endBorderDist();<a name="l00119"></a>00119 <a name="l00120"></a>00120 scale[axis].baseLineOffset = scaleWidget->margin();<a name="l00121"></a>00121 scale[axis].tickOffset = scaleWidget->margin();<a name="l00122"></a>00122 <span class="keywordflow">if</span> ( scaleWidget->scaleDraw()->hasComponent(<a name="l00123"></a>00123 QwtAbstractScaleDraw::Ticks) )<a name="l00124"></a>00124 {<a name="l00125"></a>00125 scale[axis].tickOffset += <a name="l00126"></a>00126 (<span class="keywordtype">int</span>)scaleWidget->scaleDraw()->majTickLength();<a name="l00127"></a>00127 }<a name="l00128"></a>00128 <a name="l00129"></a>00129 scale[axis].dimWithoutTitle = scaleWidget->dimForLength(<a name="l00130"></a>00130 QWIDGETSIZE_MAX, scale[axis].scaleFont);<a name="l00131"></a>00131 <a name="l00132"></a>00132 <span class="keywordflow">if</span> ( !scaleWidget->title().isEmpty() )<a name="l00133"></a>00133 {<a name="l00134"></a>00134 scale[axis].dimWithoutTitle -= <a name="l00135"></a>00135 scaleWidget->titleHeightForWidth(QWIDGETSIZE_MAX);<a name="l00136"></a>00136 }<a name="l00137"></a>00137 }<a name="l00138"></a>00138 <span class="keywordflow">else</span><a name="l00139"></a>00139 {<a name="l00140"></a>00140 scale[axis].isEnabled = <span class="keyword">false</span>;<a name="l00141"></a>00141 scale[axis].start = 0;<a name="l00142"></a>00142 scale[axis].end = 0;⌨️ 快捷键说明
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