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<title>Qwt User's Guide: qwt_plot_panner.cpp Source File</title>
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<h1>qwt_plot_panner.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span>
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<a name="l00002"></a>00002 <span class="comment"> * Qwt Widget Library</span>
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<a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 1997 Josef Wilgen</span>
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<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2002 Uwe Rathmann</span>
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<a name="l00005"></a>00005 <span class="comment"> *</span>
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<a name="l00006"></a>00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
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<a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span>
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<a name="l00008"></a>00008 <span class="comment"> *****************************************************************************/</span>
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<a name="l00009"></a>00009
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<a name="l00010"></a>00010 <span class="comment">// vim: expandtab</span>
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<a name="l00011"></a>00011
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<a name="l00012"></a>00012 <span class="preprocessor">#include "qwt_scale_div.h"</span>
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<a name="l00013"></a>00013 <span class="preprocessor">#include "qwt_plot.h"</span>
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<a name="l00014"></a>00014 <span class="preprocessor">#include "qwt_plot_canvas.h"</span>
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<a name="l00015"></a>00015 <span class="preprocessor">#include "qwt_plot_panner.h"</span>
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<a name="l00016"></a>00016
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<a name="l00017"></a>00017 <span class="keyword">class </span>QwtPlotPanner::PrivateData
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<a name="l00018"></a>00018 {
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<a name="l00019"></a>00019 <span class="keyword">public</span>:
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<a name="l00020"></a>00020 PrivateData()
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<a name="l00021"></a>00021 {
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<a name="l00022"></a>00022 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> axis = 0; axis < QwtPlot::axisCnt; axis++ )
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<a name="l00023"></a>00023 <a class="code" href="class_qwt_plot_panner.html#896c81c1d1989b26645ece85464e3977">isAxisEnabled</a>[axis] = <span class="keyword">true</span>;
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<a name="l00024"></a>00024 }
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026 <span class="keywordtype">bool</span> <a class="code" href="class_qwt_plot_panner.html#896c81c1d1989b26645ece85464e3977">isAxisEnabled</a>[QwtPlot::axisCnt];
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<a name="l00027"></a>00027 };
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<a name="l00028"></a>00028
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<a name="l00038"></a><a class="code" href="class_qwt_plot_panner.html#a9dbbfbfaf99eabdada6757211365098">00038</a> <a class="code" href="class_qwt_plot_panner.html#a9dbbfbfaf99eabdada6757211365098">QwtPlotPanner::QwtPlotPanner</a>(<a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *<a class="code" href="class_qwt_plot_panner.html#624eef57c43bc465d6702a0c4e8027bd">canvas</a>):
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<a name="l00039"></a>00039 <a class="code" href="class_qwt_panner.html">QwtPanner</a>(<a class="code" href="class_qwt_plot_panner.html#624eef57c43bc465d6702a0c4e8027bd">canvas</a>)
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<a name="l00040"></a>00040 {
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<a name="l00041"></a>00041 d_data = <span class="keyword">new</span> PrivateData();
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<a name="l00042"></a>00042
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<a name="l00043"></a>00043 connect(<span class="keyword">this</span>, SIGNAL(<a class="code" href="class_qwt_panner.html#e9ce78e6f9ae73317af29b2dc5df7372">panned</a>(<span class="keywordtype">int</span>, <span class="keywordtype">int</span>)),
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<a name="l00044"></a>00044 SLOT(<a class="code" href="class_qwt_plot_panner.html#ab045140de3e38d316593388da9231bd">moveCanvas</a>(<span class="keywordtype">int</span>, <span class="keywordtype">int</span>)));
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<a name="l00045"></a>00045 }
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<a name="l00046"></a>00046
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<a name="l00048"></a><a class="code" href="class_qwt_plot_panner.html#a72bb8323d5a8eb46900f978bf1e3623">00048</a> <a class="code" href="class_qwt_plot_panner.html#a72bb8323d5a8eb46900f978bf1e3623">QwtPlotPanner::~QwtPlotPanner</a>()
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<a name="l00049"></a>00049 {
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<a name="l00050"></a>00050 <span class="keyword">delete</span> d_data;
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<a name="l00051"></a>00051 }
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<a name="l00052"></a>00052
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<a name="l00064"></a><a class="code" href="class_qwt_plot_panner.html#cbd5d67684c5a20ea0115e66f69540e4">00064</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_panner.html#cbd5d67684c5a20ea0115e66f69540e4">QwtPlotPanner::setAxisEnabled</a>(<span class="keywordtype">int</span> axis, <span class="keywordtype">bool</span> on)
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<a name="l00065"></a>00065 {
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<a name="l00066"></a>00066 <span class="keywordflow">if</span> ( axis >= 0 && axis < QwtPlot::axisCnt )
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<a name="l00067"></a>00067 d_data->isAxisEnabled[axis] = on;
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<a name="l00068"></a>00068 }
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<a name="l00069"></a>00069
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<a name="l00078"></a><a class="code" href="class_qwt_plot_panner.html#896c81c1d1989b26645ece85464e3977">00078</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_plot_panner.html#896c81c1d1989b26645ece85464e3977">QwtPlotPanner::isAxisEnabled</a>(<span class="keywordtype">int</span> axis)<span class="keyword"> const</span>
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<a name="l00079"></a>00079 <span class="keyword"></span>{
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<a name="l00080"></a>00080 <span class="keywordflow">if</span> ( axis >= 0 && axis < QwtPlot::axisCnt )
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<a name="l00081"></a>00081 <span class="keywordflow">return</span> d_data->isAxisEnabled[axis];
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<a name="l00082"></a>00082
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<a name="l00083"></a>00083 <span class="keywordflow">return</span> <span class="keyword">true</span>;
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<a name="l00084"></a>00084 }
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<a name="l00085"></a>00085
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<a name="l00087"></a><a class="code" href="class_qwt_plot_panner.html#624eef57c43bc465d6702a0c4e8027bd">00087</a> <a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *<a class="code" href="class_qwt_plot_panner.html#624eef57c43bc465d6702a0c4e8027bd">QwtPlotPanner::canvas</a>()
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<a name="l00088"></a>00088 {
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<a name="l00089"></a>00089 QWidget *w = parentWidget();
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<a name="l00090"></a>00090 <span class="keywordflow">if</span> ( w && w->inherits(<span class="stringliteral">"QwtPlotCanvas"</span>) )
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<a name="l00091"></a>00091 <span class="keywordflow">return</span> (<a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *)w;
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<a name="l00092"></a>00092
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<a name="l00093"></a>00093 <span class="keywordflow">return</span> NULL;
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<a name="l00094"></a>00094 }
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<a name="l00095"></a>00095
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<a name="l00097"></a><a class="code" href="class_qwt_plot_panner.html#ac87f509106d49e083421d806a049bb7">00097</a> <span class="keyword">const</span> <a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *<a class="code" href="class_qwt_plot_panner.html#624eef57c43bc465d6702a0c4e8027bd">QwtPlotPanner::canvas</a>()<span class="keyword"> const</span>
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<a name="l00098"></a>00098 <span class="keyword"></span>{
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<a name="l00099"></a>00099 <span class="keywordflow">return</span> ((<a class="code" href="class_qwt_plot_panner.html">QwtPlotPanner</a> *)<span class="keyword">this</span>)->canvas();
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<a name="l00100"></a>00100 }
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<a name="l00101"></a>00101
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<a name="l00103"></a><a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">00103</a> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *<a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">QwtPlotPanner::plot</a>()
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<a name="l00104"></a>00104 {
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<a name="l00105"></a>00105 QObject *w = <a class="code" href="class_qwt_plot_panner.html#624eef57c43bc465d6702a0c4e8027bd">canvas</a>();
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<a name="l00106"></a>00106 <span class="keywordflow">if</span> ( w )
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<a name="l00107"></a>00107 {
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<a name="l00108"></a>00108 w = w->parent();
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<a name="l00109"></a>00109 <span class="keywordflow">if</span> ( w && w->inherits(<span class="stringliteral">"QwtPlot"</span>) )
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<a name="l00110"></a>00110 <span class="keywordflow">return</span> (<a class="code" href="class_qwt_plot.html">QwtPlot</a> *)w;
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<a name="l00111"></a>00111 }
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<a name="l00112"></a>00112
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<a name="l00113"></a>00113 <span class="keywordflow">return</span> NULL;
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<a name="l00114"></a>00114 }
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<a name="l00115"></a>00115
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<a name="l00117"></a><a class="code" href="class_qwt_plot_panner.html#5ecdd6a27002d13b4967eadabaa17674">00117</a> <span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *<a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">QwtPlotPanner::plot</a>()<span class="keyword"> const</span>
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<a name="l00118"></a>00118 <span class="keyword"></span>{
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<a name="l00119"></a>00119 <span class="keywordflow">return</span> ((<a class="code" href="class_qwt_plot_panner.html">QwtPlotPanner</a> *)<span class="keyword">this</span>)->plot();
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<a name="l00120"></a>00120 }
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<a name="l00121"></a>00121
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<a name="l00130"></a><a class="code" href="class_qwt_plot_panner.html#ab045140de3e38d316593388da9231bd">00130</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_panner.html#ab045140de3e38d316593388da9231bd">QwtPlotPanner::moveCanvas</a>(<span class="keywordtype">int</span> dx, <span class="keywordtype">int</span> dy)
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<a name="l00131"></a>00131 {
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<a name="l00132"></a>00132 <span class="keywordflow">if</span> ( dx == 0 && dy == 0 )
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<a name="l00133"></a>00133 <span class="keywordflow">return</span>;
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<a name="l00134"></a>00134
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<a name="l00135"></a>00135 <a class="code" href="class_qwt_plot.html">QwtPlot</a> *<a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a> = <a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">QwtPlotPanner::plot</a>();
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<a name="l00136"></a>00136 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a> == NULL )
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<a name="l00137"></a>00137 <span class="keywordflow">return</span>;
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<a name="l00138"></a>00138
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<a name="l00139"></a>00139 <span class="keyword">const</span> <span class="keywordtype">bool</span> doAutoReplot = <a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a>-><a class="code" href="class_qwt_plot.html#3a639850b65bc4dbf22b3f3170d61804">autoReplot</a>();
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<a name="l00140"></a>00140 <a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a>-><a class="code" href="class_qwt_plot.html#654934ec2ad167101dacb5174f5172d6">setAutoReplot</a>(<span class="keyword">false</span>);
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<a name="l00141"></a>00141
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<a name="l00142"></a>00142 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> axis = 0; axis < QwtPlot::axisCnt; axis++ )
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<a name="l00143"></a>00143 {
122
<a name="l00144"></a>00144 <span class="keywordflow">if</span> ( !d_data->isAxisEnabled[axis] )
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<a name="l00145"></a>00145 <span class="keywordflow">continue</span>;
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<a name="l00146"></a>00146
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<a name="l00147"></a>00147 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html">QwtScaleMap</a> map = <a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a>-><a class="code" href="class_qwt_plot.html#44dc140e8503bb44da7921841f31051c">canvasMap</a>(axis);
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<a name="l00148"></a>00148
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<a name="l00149"></a>00149 <span class="keyword">const</span> <span class="keywordtype">int</span> i1 = map.<a class="code" href="class_qwt_scale_map.html#f35bfdc44bad4b6932ab02e60e8e6e29">transform</a>(<a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a>-><a class="code" href="class_qwt_plot.html#029086e7b26fcfeff5430d25a4df4f3e">axisScaleDiv</a>(axis)-><a class="code" href="class_qwt_scale_div.html#df5e9211cd42a3efc1a3cdf836dc741a">lBound</a>());
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<a name="l00150"></a>00150 <span class="keyword">const</span> <span class="keywordtype">int</span> i2 = map.transform(<a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a>-><a class="code" href="class_qwt_plot.html#029086e7b26fcfeff5430d25a4df4f3e">axisScaleDiv</a>(axis)-><a class="code" href="class_qwt_scale_div.html#8c6238cf9e8f406e9633fcede305e33c">hBound</a>());
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<a name="l00151"></a>00151
130
<a name="l00152"></a>00152 <span class="keywordtype">double</span> d1, d2;
131
<a name="l00153"></a>00153 <span class="keywordflow">if</span> ( axis == QwtPlot::xBottom || axis == QwtPlot::xTop )
132
<a name="l00154"></a>00154 {
133
<a name="l00155"></a>00155 d1 = map.invTransform(i1 - dx);
134
<a name="l00156"></a>00156 d2 = map.invTransform(i2 - dx);
135
<a name="l00157"></a>00157 }
136
<a name="l00158"></a>00158 <span class="keywordflow">else</span>
137
<a name="l00159"></a>00159 {
138
<a name="l00160"></a>00160 d1 = map.invTransform(i1 - dy);
139
<a name="l00161"></a>00161 d2 = map.invTransform(i2 - dy);
140
<a name="l00162"></a>00162 }
141
<a name="l00163"></a>00163
142
<a name="l00164"></a>00164 <a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a>-><a class="code" href="class_qwt_plot.html#cef5ea818944b93b8695d0c16924eed6">setAxisScale</a>(axis, d1, d2);
143
<a name="l00165"></a>00165 }
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<a name="l00166"></a>00166
145
<a name="l00167"></a>00167 <a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a>-><a class="code" href="class_qwt_plot.html#654934ec2ad167101dacb5174f5172d6">setAutoReplot</a>(doAutoReplot);
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<a name="l00168"></a>00168 <a class="code" href="class_qwt_plot_panner.html#e52375921bfacc3e17d3db45858b1485">plot</a>-><a class="code" href="class_qwt_plot.html#7b094e29b8e92b00e36517d0d7633c4b">replot</a>();
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<a name="l00169"></a>00169 }
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</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sat May 24 18:47:40 2008 for Qwt User's Guide by
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