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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_marker.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_marker.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 <qpainter.h></span><a name="l00013"></a>00013 <span class="preprocessor">#include "qwt_painter.h"</span><a name="l00014"></a>00014 <span class="preprocessor">#include "qwt_scale_map.h"</span><a name="l00015"></a>00015 <span class="preprocessor">#include "qwt_plot_marker.h"</span><a name="l00016"></a>00016 <span class="preprocessor">#include "qwt_symbol.h"</span><a name="l00017"></a>00017 <span class="preprocessor">#include "qwt_text.h"</span><a name="l00018"></a>00018 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00019"></a>00019 <a name="l00020"></a>00020 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> LabelDist = 2;<a name="l00021"></a>00021 <a name="l00022"></a>00022 <span class="keyword">class </span>QwtPlotMarker::PrivateData<a name="l00023"></a>00023 {<a name="l00024"></a>00024 <span class="keyword">public</span>:<a name="l00025"></a>00025 PrivateData():<a name="l00026"></a>00026 align(Qt::AlignCenter),<a name="l00027"></a>00027 style(NoLine),<a name="l00028"></a>00028 <a class="code" href="class_qwt_plot_marker.html#ad43f527f3c0033865fea5a488ef3857">xValue</a>(0.0),<a name="l00029"></a>00029 <a class="code" href="class_qwt_plot_marker.html#30ec999a3e4eba759d4c405fa92f9563">yValue</a>(0.0)<a name="l00030"></a>00030 {<a name="l00031"></a>00031 }<a name="l00032"></a>00032 <a name="l00033"></a>00033 <a class="code" href="class_qwt_text.html">QwtText</a> <a class="code" href="class_qwt_plot_marker.html#cf81c4a657fd772cf7c5387a19ab6793">label</a>;<a name="l00034"></a>00034 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00035"></a>00035 <span class="preprocessor"></span> <span class="keywordtype">int</span> align;<a name="l00036"></a>00036 <span class="preprocessor">#else</span><a name="l00037"></a>00037 <span class="preprocessor"></span> Qt::Alignment align;<a name="l00038"></a>00038 <span class="preprocessor">#endif</span><a name="l00039"></a>00039 <span class="preprocessor"></span> QPen pen;<a name="l00040"></a>00040 <a class="code" href="class_qwt_symbol.html">QwtSymbol</a> sym;<a name="l00041"></a>00041 <a class="code" href="class_qwt_plot_marker.html#297efa835423bfa5a870bbc8ff1c623b">LineStyle</a> style;<a name="l00042"></a>00042 <a name="l00043"></a>00043 <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_marker.html#ad43f527f3c0033865fea5a488ef3857">xValue</a>;<a name="l00044"></a>00044 <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_marker.html#30ec999a3e4eba759d4c405fa92f9563">yValue</a>;<a name="l00045"></a>00045 };<a name="l00046"></a>00046 <a name="l00048"></a><a class="code" href="class_qwt_plot_marker.html#86eeb61f8f50e879569a439f8d6ab912">00048</a> <a class="code" href="class_qwt_plot_marker.html#86eeb61f8f50e879569a439f8d6ab912">QwtPlotMarker::QwtPlotMarker</a>():<a name="l00049"></a>00049 <a class="code" href="class_qwt_plot_item.html">QwtPlotItem</a>(<a class="code" href="class_qwt_text.html">QwtText</a>(<span class="stringliteral">"Marker"</span>))<a name="l00050"></a>00050 {<a name="l00051"></a>00051 d_data = <span class="keyword">new</span> PrivateData;<a name="l00052"></a>00052 <a class="code" href="class_qwt_plot_item.html#57d90e4146133b59d589c71b3a643e82">setZ</a>(30.0);<a name="l00053"></a>00053 }<a name="l00054"></a>00054 <a name="l00056"></a><a class="code" href="class_qwt_plot_marker.html#920d2ddeb2041c03790d7c173e3ad0cf">00056</a> <a class="code" href="class_qwt_plot_marker.html#920d2ddeb2041c03790d7c173e3ad0cf">QwtPlotMarker::~QwtPlotMarker</a>()<a name="l00057"></a>00057 {<a name="l00058"></a>00058 <span class="keyword">delete</span> d_data;<a name="l00059"></a>00059 }<a name="l00060"></a>00060 <a name="l00061"></a><a class="code" href="class_qwt_plot_marker.html#4e48032adf8bdda1aacba4977280123f">00061</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_marker.html#4e48032adf8bdda1aacba4977280123f">QwtPlotMarker::rtti</a>()<span class="keyword"> const</span><a name="l00062"></a>00062 <span class="keyword"></span>{<a name="l00063"></a>00063 <span class="keywordflow">return</span> QwtPlotItem::Rtti_PlotMarker;<a name="l00064"></a>00064 }<a name="l00065"></a>00065 <a name="l00067"></a><a class="code" href="class_qwt_plot_marker.html#de838d7e6da2e84934bb87327afd3c5c">00067</a> QwtDoublePoint <a class="code" href="class_qwt_plot_marker.html#de838d7e6da2e84934bb87327afd3c5c">QwtPlotMarker::value</a>()<span class="keyword"> const</span><a name="l00068"></a>00068 <span class="keyword"></span>{<a name="l00069"></a>00069 <span class="keywordflow">return</span> QwtDoublePoint(d_data->xValue, d_data->yValue);<a name="l00070"></a>00070 }<a name="l00071"></a>00071 <a name="l00073"></a><a class="code" href="class_qwt_plot_marker.html#ad43f527f3c0033865fea5a488ef3857">00073</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_marker.html#ad43f527f3c0033865fea5a488ef3857">QwtPlotMarker::xValue</a>()<span class="keyword"> const </span><a name="l00074"></a>00074 <span class="keyword"></span>{ <a name="l00075"></a>00075 <span class="keywordflow">return</span> d_data->xValue; <a name="l00076"></a>00076 }<a name="l00077"></a>00077 <a name="l00079"></a><a class="code" href="class_qwt_plot_marker.html#30ec999a3e4eba759d4c405fa92f9563">00079</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_marker.html#30ec999a3e4eba759d4c405fa92f9563">QwtPlotMarker::yValue</a>()<span class="keyword"> const </span><a name="l00080"></a>00080 <span class="keyword"></span>{ <a name="l00081"></a>00081 <span class="keywordflow">return</span> d_data->yValue; <a name="l00082"></a>00082 }<a name="l00083"></a>00083 <a name="l00085"></a><a class="code" href="class_qwt_plot_marker.html#ef658b7c91945ba1ef7cc38b500abf0d">00085</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_marker.html#d3a480c64192dabffd02bf5db31f917c">QwtPlotMarker::setValue</a>(<span class="keyword">const</span> QwtDoublePoint& pos)<a name="l00086"></a>00086 {<a name="l00087"></a>00087 <a class="code" href="class_qwt_plot_marker.html#d3a480c64192dabffd02bf5db31f917c">setValue</a>(pos.x(), pos.y());<a name="l00088"></a>00088 }<a name="l00089"></a>00089 <a name="l00091"></a><a class="code" href="class_qwt_plot_marker.html#d3a480c64192dabffd02bf5db31f917c">00091</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_marker.html#d3a480c64192dabffd02bf5db31f917c">QwtPlotMarker::setValue</a>(<span class="keywordtype">double</span> x, <span class="keywordtype">double</span> y) <a name="l00092"></a>00092 {<a name="l00093"></a>00093 <span class="keywordflow">if</span> ( x != d_data->xValue || y != d_data->yValue )<a name="l00094"></a>00094 {<a name="l00095"></a>00095 d_data->xValue = x; <a name="l00096"></a>00096 d_data->yValue = y; <a name="l00097"></a>00097 <a class="code" href="class_qwt_plot_item.html#d956fdbce5b0721abccce6d09fe4d5ce">itemChanged</a>(); <a name="l00098"></a>00098 }<a name="l00099"></a>00099 }<a name="l00100"></a>00100 <a name="l00102"></a><a class="code" href="class_qwt_plot_marker.html#0d53b0e0ed8b48478c02a0ecaf5852b2">00102</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_marker.html#0d53b0e0ed8b48478c02a0ecaf5852b2">QwtPlotMarker::setXValue</a>(<span class="keywordtype">double</span> x) <a name="l00103"></a>00103 { <a name="l00104"></a>00104 <a class="code" href="class_qwt_plot_marker.html#d3a480c64192dabffd02bf5db31f917c">setValue</a>(x, d_data->yValue);<a name="l00105"></a>00105 }<a name="l00106"></a>00106 <a name="l00108"></a><a class="code" href="class_qwt_plot_marker.html#47d8e3c0708ad02a9c7cc6aaf985e278">00108</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_marker.html#47d8e3c0708ad02a9c7cc6aaf985e278">QwtPlotMarker::setYValue</a>(<span class="keywordtype">double</span> y) <a name="l00109"></a>00109 { <a name="l00110"></a>00110 <a class="code" href="class_qwt_plot_marker.html#d3a480c64192dabffd02bf5db31f917c">setValue</a>(d_data->xValue, y);<a name="l00111"></a>00111 }<a name="l00112"></a>00112 <a name="l00120"></a><a class="code" href="class_qwt_plot_marker.html#2958b4b028b822f2b5e08fda061928e7">00120</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_marker.html#2958b4b028b822f2b5e08fda061928e7">QwtPlotMarker::draw</a>(QPainter *p,<a name="l00121"></a>00121 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html">QwtScaleMap</a> &xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html">QwtScaleMap</a> &yMap,<a name="l00122"></a>00122 <span class="keyword">const</span> QRect &r)<span class="keyword"> const</span><a name="l00123"></a>00123 <span class="keyword"></span>{<a name="l00124"></a>00124 <span class="keyword">const</span> <span class="keywordtype">int</span> x = xMap.<a class="code" href="class_qwt_scale_map.html#1ddda39f41e137560e625a8c66c1d2e1">transform</a>(d_data->xValue);<a name="l00125"></a>00125 <span class="keyword">const</span> <span class="keywordtype">int</span> y = yMap.<a class="code" href="class_qwt_scale_map.html#1ddda39f41e137560e625a8c66c1d2e1">transform</a>(d_data->yValue);<a name="l00126"></a>00126 <a name="l00127"></a>00127 <span class="comment">// draw lines</span><a name="l00128"></a>00128 <span class="keywordflow">if</span> (d_data->style != NoLine)<a name="l00129"></a>00129 {<a name="l00130"></a>00130 p->setPen(d_data->pen);<a name="l00131"></a>00131 <span class="keywordflow">if</span> ((d_data->style == HLine) || (d_data->style == Cross))<a name="l00132"></a>00132 <a class="code" href="class_qwt_painter.html#f809f23704df7e05f51222daa296ca80">QwtPainter::drawLine</a>(p, r.left(), y, r.right(), y);<a name="l00133"></a>00133 <span class="keywordflow">if</span> ((d_data->style == VLine)||(d_data->style == Cross))<a name="l00134"></a>00134 <a class="code" href="class_qwt_painter.html#f809f23704df7e05f51222daa296ca80">QwtPainter::drawLine</a>(p, x, r.top(), x, r.bottom());<a name="l00135"></a>00135 }<a name="l00136"></a>00136 <a name="l00137"></a>00137 <span class="comment">// draw symbol</span><a name="l00138"></a>00138 QSize sSym(0, 0);<a name="l00139"></a>00139 <span class="keywordflow">if</span> (d_data->sym.style() != QwtSymbol::NoSymbol)<a name="l00140"></a>00140 {<a name="l00141"></a>00141 sSym = d_data->sym.size();<a name="l00142"></a>00142 d_data->sym.draw(p, x, y);<a name="l00143"></a>00143 }<a name="l00144"></a>00144 <a name="l00145"></a>00145 <span class="comment">// draw label</span><a name="l00146"></a>00146 <span class="keywordflow">if</span> (!d_data->label.isEmpty())<a name="l00147"></a>00147 {<a name="l00148"></a>00148 <span class="keywordtype">int</span> xlw = qwtMax(<span class="keywordtype">int</span>(d_data->pen.width()), 1);<a name="l00149"></a>00149 <span class="keywordtype">int</span> ylw = xlw;<a name="l00150"></a>00150 <span class="keywordtype">int</span> xlw1;<a name="l00151"></a>00151 <span class="keywordtype">int</span> ylw1;<a name="l00152"></a>00152 <a name="l00153"></a>00153 <span class="keyword">const</span> <span class="keywordtype">int</span> xLabelDist = <a name="l00154"></a>00154 <a class="code" href="class_qwt_painter.html#3de95bfc83c9beee537404b41749bad5">QwtPainter::metricsMap</a>().<a class="code" href="class_qwt_metrics_map.html#e1cce24cb234af56b3e52bfad1d153ac">screenToLayoutX</a>(LabelDist);<a name="l00155"></a>00155 <span class="keyword">const</span> <span class="keywordtype">int</span> yLabelDist = ⌨️ 快捷键说明
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