File: qwt__curve_8cpp-source.html

package info (click to toggle)
libqwt 4.2.0-4.1
links: PTS
area: main
in suites: lenny
size: 9,832 kB
ctags: 5,512
sloc: cpp: 22,973; ansic: 244; makefile: 66
file content (626 lines) | stat: -rw-r--r-- 42,171 bytes
parent folder | download | duplicates (5)
<!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&apos;s Guide: qwt_curve.cpp Source File</title>
<link href="doxygen.css" rel="stylesheet" type="text/css">
</head><body>
<!-- Generated by Doxygen 1.3.8 -->
<div class="qindex"><a class="qindex" href="index.html">Main&nbsp;Page</a> | <a class="qindex" href="hierarchy.html">Class&nbsp;Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical&nbsp;List</a> | <a class="qindex" href="annotated.html">Class&nbsp;List</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="functions.html">Class&nbsp;Members</a> | <a class="qindex" href="globals.html">File&nbsp;Members</a> | <a class="qindex" href="pages.html">Related&nbsp;Pages</a></div>
<h1>qwt_curve.cpp</h1><pre class="fragment"><div>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span>
00002 <span class="comment"> * Qwt Widget Library</span>
00003 <span class="comment"> * Copyright (C) 1997   Josef Wilgen</span>
00004 <span class="comment"> * Copyright (C) 2002   Uwe Rathmann</span>
00005 <span class="comment"> *</span>
00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span>
00008 <span class="comment"> *****************************************************************************/</span>
00009 
00010 <span class="preprocessor">#include &lt;qpainter.h&gt;</span>
00011 <span class="preprocessor">#include "qwt_global.h"</span>
00012 <span class="preprocessor">#include "qwt_curve.h"</span>
00013 <span class="preprocessor">#include "qwt_data.h"</span>
00014 <span class="preprocessor">#include "qwt_dimap.h"</span>
00015 <span class="preprocessor">#include "qwt_double_rect.h"</span>
00016 <span class="preprocessor">#include "<a class="code" href="qwt__math_8h.html">qwt_math.h</a>"</span>
00017 <span class="preprocessor">#include "qwt_painter.h"</span>
00018 
<a name="l00022"></a><a class="code" href="class_qwt_curve.html#b0">00022</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b0">QwtCurve::init</a>(<span class="keyword">const</span> QString &amp;title)
00023 {
00024     d_pen = QPen(Qt::black, 1);
00025     d_ref = 0.0;
00026     d_splineSize = 250;
00027     d_options = Auto;
00028     d_title = title;
00029     d_style = Lines;
00030     d_data = <span class="keyword">new</span> <a class="code" href="class_qwt_double_point_data.html">QwtDoublePointData</a>(QwtArray&lt;QwtDoublePoint&gt;());
00031 }
00032 
<a name="l00036"></a><a class="code" href="class_qwt_curve.html#b1">00036</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b1">QwtCurve::copy</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_curve.html">QwtCurve</a> &amp;c)
00037 {
00038     d_ref = c.<a class="code" href="class_qwt_curve.html#r2">d_ref</a>;
00039     d_sym = c.<a class="code" href="class_qwt_curve.html#r3">d_sym</a>;
00040     d_pen = c.<a class="code" href="class_qwt_curve.html#r4">d_pen</a>;
00041     d_title = c.<a class="code" href="class_qwt_curve.html#r6">d_title</a>;
00042     d_style = c.<a class="code" href="class_qwt_curve.html#r1">d_style</a>;
00043 
00044     d_splineSize = c.<a class="code" href="class_qwt_curve.html#r8">d_splineSize</a>;
00045     d_options = c.<a class="code" href="class_qwt_curve.html#r7">d_options</a>;
00046 
00047     <span class="keyword">delete</span> d_data;
00048     d_data = c.<a class="code" href="class_qwt_curve.html#r0">d_data</a>-&gt;<a class="code" href="class_qwt_data.html#a2">copy</a>();
00049 }
00050 
<a name="l00052"></a><a class="code" href="class_qwt_curve.html#a2">00052</a> <a class="code" href="class_qwt_curve.html#a2">QwtCurve::~QwtCurve</a>()
00053 {
00054     <span class="keyword">delete</span> d_data;
00055 }
00056 
<a name="l00060"></a><a class="code" href="class_qwt_curve.html#a1">00060</a> <a class="code" href="class_qwt_curve.html#a0">QwtCurve::QwtCurve</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_curve.html">QwtCurve</a> &amp;c)
00061 {
00062     <a class="code" href="class_qwt_curve.html#b0">init</a>(c.<a class="code" href="class_qwt_curve.html#r6">d_title</a>);
00063     <a class="code" href="class_qwt_curve.html#b1">copy</a>(c);
00064 }
00065 
<a name="l00069"></a><a class="code" href="class_qwt_curve.html#a3">00069</a> <span class="keyword">const</span> <a class="code" href="class_qwt_curve.html">QwtCurve</a>&amp; <a class="code" href="class_qwt_curve.html#a3">QwtCurve::operator=</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_curve.html">QwtCurve</a> &amp;c)
00070 {
00071     <span class="keywordflow">if</span> (<span class="keyword">this</span> != &amp;c)
00072     {
00073         <a class="code" href="class_qwt_curve.html#b1">copy</a>(c);
00074         <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00075     }
00076 
00077     <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00078 }
00079 
<a name="l00110"></a><a class="code" href="class_qwt_curve.html#a27">00110</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a27">QwtCurve::setStyle</a>(<span class="keywordtype">int</span> style, <span class="keywordtype">int</span> options)
00111 {
00112     d_options = options;
00113     d_style = style;
00114     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00115 }
00116 
<a name="l00122"></a><a class="code" href="class_qwt_curve.html#a28">00122</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_curve.html#a28">QwtCurve::style</a>()<span class="keyword"> const </span>
00123 <span class="keyword"></span>{ 
00124     <span class="keywordflow">return</span> d_style; 
00125 }
00126 
<a name="l00132"></a><a class="code" href="class_qwt_curve.html#a29">00132</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a29">QwtCurve::setSymbol</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_symbol.html">QwtSymbol</a> &amp;s )
00133 {
00134     d_sym = s;
00135     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00136 }
00137 
<a name="l00142"></a><a class="code" href="class_qwt_curve.html#a30">00142</a> <span class="keyword">const</span> <a class="code" href="class_qwt_symbol.html">QwtSymbol</a> &amp;<a class="code" href="class_qwt_curve.html#a30">QwtCurve::symbol</a>()<span class="keyword"> const </span>
00143 <span class="keyword"></span>{ 
00144     <span class="keywordflow">return</span> d_sym; 
00145 }
00146 
00147 
<a name="l00152"></a><a class="code" href="class_qwt_curve.html#a21">00152</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a21">QwtCurve::setPen</a>(<span class="keyword">const</span> QPen &amp;p)
00153 {
00154     <span class="keywordflow">if</span> ( p != d_pen )
00155     {
00156         d_pen = p;
00157         <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00158     }
00159 }
00160 
<a name="l00165"></a><a class="code" href="class_qwt_curve.html#a22">00165</a> <span class="keyword">const</span> QPen&amp; <a class="code" href="class_qwt_curve.html#a22">QwtCurve::pen</a>()<span class="keyword"> const </span>
00166 <span class="keyword"></span>{ 
00167     <span class="keywordflow">return</span> d_pen; 
00168 }
00169 
<a name="l00182"></a><a class="code" href="class_qwt_curve.html#a23">00182</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a23">QwtCurve::setBrush</a>(<span class="keyword">const</span> QBrush &amp;brush)
00183 {
00184     <span class="keywordflow">if</span> ( brush != d_brush )
00185     {
00186         d_brush = brush;
00187         <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00188     }
00189 }
00190 
<a name="l00196"></a><a class="code" href="class_qwt_curve.html#a24">00196</a> <span class="keyword">const</span> QBrush&amp; <a class="code" href="class_qwt_curve.html#a24">QwtCurve::brush</a>()<span class="keyword"> const </span>
00197 <span class="keyword"></span>{
00198     <span class="keywordflow">return</span> d_brush;
00199 }
00200 
00201 
<a name="l00213"></a><a class="code" href="class_qwt_curve.html#a5">00213</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a5">QwtCurve::setData</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> *xData, <span class="keyword">const</span> <span class="keywordtype">double</span> *yData, <span class="keywordtype">int</span> size)
00214 {
00215     <span class="keyword">delete</span> d_data;
00216     d_data = <span class="keyword">new</span> <a class="code" href="class_qwt_array_data.html">QwtArrayData</a>(xData, yData, size);
00217     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00218 }
00219 
<a name="l00228"></a><a class="code" href="class_qwt_curve.html#a6">00228</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a5">QwtCurve::setData</a>(<span class="keyword">const</span> QwtArray&lt;double&gt; &amp;xData, 
00229     <span class="keyword">const</span> QwtArray&lt;double&gt; &amp;yData)
00230 {
00231     <span class="keyword">delete</span> d_data;
00232     d_data = <span class="keyword">new</span> <a class="code" href="class_qwt_array_data.html">QwtArrayData</a>(xData, yData);
00233     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00234 }
00235 
<a name="l00243"></a><a class="code" href="class_qwt_curve.html#a7">00243</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a5">QwtCurve::setData</a>(<span class="keyword">const</span> QwtArray&lt;QwtDoublePoint&gt; &amp;data)
00244 {
00245     <span class="keyword">delete</span> d_data;
00246     d_data = <span class="keyword">new</span> <a class="code" href="class_qwt_double_point_data.html">QwtDoublePointData</a>(data);
00247     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00248 }
00249 
<a name="l00257"></a><a class="code" href="class_qwt_curve.html#a8">00257</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a5">QwtCurve::setData</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_data.html">QwtData</a> &amp;data)
00258 {
00259     <span class="keyword">delete</span> d_data;
00260     d_data = data.<a class="code" href="class_qwt_data.html#a2">copy</a>();
00261     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00262 }
00263 
<a name="l00277"></a><a class="code" href="class_qwt_curve.html#a4">00277</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a4">QwtCurve::setRawData</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> *xData, <span class="keyword">const</span> <span class="keywordtype">double</span> *yData, <span class="keywordtype">int</span> size)
00278 {
00279     <span class="keyword">delete</span> d_data;
00280     d_data = <span class="keyword">new</span> <a class="code" href="class_qwt_c_pointer_data.html">QwtCPointerData</a>(xData, yData, size);
00281     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00282 }
00283 
<a name="l00288"></a><a class="code" href="class_qwt_curve.html#a19">00288</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a19">QwtCurve::setTitle</a>(<span class="keyword">const</span> QString &amp;title)
00289 {
00290     d_title = title;
00291     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00292 }
00293 
<a name="l00298"></a><a class="code" href="class_qwt_curve.html#a20">00298</a> <span class="keyword">const</span> QString &amp;<a class="code" href="class_qwt_curve.html#a20">QwtCurve::title</a>()<span class="keyword"> const </span>
00299 <span class="keyword"></span>{ 
00300     <span class="keywordflow">return</span> d_title; 
00301 }
00302 
<a name="l00309"></a><a class="code" href="class_qwt_curve.html#a12">00309</a> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a> <a class="code" href="class_qwt_curve.html#a12">QwtCurve::boundingRect</a>()<span class="keyword"> const</span>
00310 <span class="keyword"></span>{
00311     <span class="keywordflow">if</span> ( d_data == NULL )
00312         <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a>(1.0, -1.0, 1.0, -1.0); <span class="comment">// invalid</span>
00313 
00314     <span class="keywordflow">return</span> d_data-&gt;<a class="code" href="class_qwt_data.html#a6">boundingRect</a>();
00315 }
00316 
<a name="l00321"></a><a class="code" href="class_qwt_curve.html#a0">00321</a> <a class="code" href="class_qwt_curve.html#a0">QwtCurve::QwtCurve</a>(<span class="keyword">const</span> QString &amp;title)
00322 {
00323     <a class="code" href="class_qwt_curve.html#b0">init</a>(title);
00324 }
00325 
<a name="l00331"></a><a class="code" href="class_qwt_curve.html#b11">00331</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_curve.html#b11">QwtCurve::verifyRange</a>(<span class="keywordtype">int</span> &amp;i1, <span class="keywordtype">int</span> &amp;i2)
00332 {
00333     <span class="keywordtype">int</span> size = <a class="code" href="class_qwt_curve.html#a9">dataSize</a>();
00334 
00335     <span class="keywordflow">if</span> (size &lt; 1) <span class="keywordflow">return</span> 0;
00336 
00337     i1 = <a class="code" href="qwt__math_8h.html#a37">qwtLim</a>(i1, 0, size-1);
00338     i2 = <a class="code" href="qwt__math_8h.html#a37">qwtLim</a>(i2, 0, size-1);
00339     <a class="code" href="qwt__math_8h.html#a36">qwtSort</a>(i1, i2, i1, i2);
00340 
00341     <span class="keywordflow">return</span> (i2 - i1 + 1);
00342 }
00343 
<a name="l00357"></a><a class="code" href="class_qwt_curve.html#a33">00357</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a33">QwtCurve::draw</a>(QPainter *painter,
00358     <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;yMap, <span class="keywordtype">int</span> from, <span class="keywordtype">int</span> to)
00359 {
00360     <span class="keywordflow">if</span> ( !painter || <a class="code" href="class_qwt_curve.html#a9">dataSize</a>() &lt;= 0 )
00361         <span class="keywordflow">return</span>;
00362 
00363     <span class="keywordflow">if</span> (to &lt; 0)
00364         to = <a class="code" href="class_qwt_curve.html#a9">dataSize</a>() - 1;
00365 
00366     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_curve.html#b11">verifyRange</a>(from, to) &gt; 0 )
00367     {
00368         painter-&gt;save();
00369         painter-&gt;setPen(d_pen);
00370 
00371         QBrush b = d_brush;
00372         <span class="keywordflow">if</span> ( b.style() != Qt::NoBrush &amp;&amp; !b.color().isValid() )
00373             b.setColor(d_pen.color());
00374 
00375         painter-&gt;setBrush(b);
00376 
00377         <a class="code" href="class_qwt_curve.html#b2">drawCurve</a>(painter, d_style, xMap, yMap, from, to);
00378         painter-&gt;restore();
00379 
00380         <span class="keywordflow">if</span> (d_sym.<a class="code" href="class_qwt_symbol.html#a13">style</a>() != QwtSymbol::None)
00381         {
00382             painter-&gt;save();
00383             <a class="code" href="class_qwt_curve.html#b3">drawSymbols</a>(painter, d_sym, xMap, yMap, from, to);
00384             painter-&gt;restore();
00385         }
00386     }
00387 }
00388 
<a name="l00401"></a><a class="code" href="class_qwt_curve.html#b2">00401</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b2">QwtCurve::drawCurve</a>(QPainter *painter, <span class="keywordtype">int</span> style,
00402     <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;yMap, <span class="keywordtype">int</span> from, <span class="keywordtype">int</span> to)
00403 {
00404     <span class="keywordflow">switch</span> (style)
00405     {
00406         <span class="keywordflow">case</span> NoCurve:
00407             <span class="keywordflow">break</span>;
00408         <span class="keywordflow">case</span> Lines:
00409             <a class="code" href="class_qwt_curve.html#b4">drawLines</a>(painter, xMap, yMap, from, to);
00410             <span class="keywordflow">break</span>;
00411         <span class="keywordflow">case</span> Sticks:
00412             <a class="code" href="class_qwt_curve.html#b5">drawSticks</a>(painter, xMap, yMap, from, to);
00413             <span class="keywordflow">break</span>;
00414         <span class="keywordflow">case</span> Steps:
00415             <a class="code" href="class_qwt_curve.html#b7">drawSteps</a>(painter, xMap, yMap, from, to);
00416             <span class="keywordflow">break</span>;
00417         <span class="keywordflow">case</span> Spline:
00418             <span class="keywordflow">if</span> ( from &gt; 0 || to &lt; <a class="code" href="class_qwt_curve.html#a9">dataSize</a>() - 1 )
00419                 <a class="code" href="class_qwt_curve.html#b4">drawLines</a>(painter, xMap, yMap, from, to);
00420             <span class="keywordflow">else</span>
00421                 <a class="code" href="class_qwt_curve.html#b8">drawSpline</a>(painter, xMap, yMap);
00422             <span class="keywordflow">break</span>;
00423         <span class="keywordflow">case</span> Dots:
00424             <a class="code" href="class_qwt_curve.html#b6">drawDots</a>(painter, xMap, yMap, from, to);
00425             <span class="keywordflow">break</span>;
00426         <span class="keywordflow">default</span>:
00427             <span class="keywordflow">break</span>;
00428     }
00429 }
00430 
<a name="l00441"></a><a class="code" href="class_qwt_curve.html#b4">00441</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b4">QwtCurve::drawLines</a>(QPainter *painter,
00442     <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;yMap, <span class="keywordtype">int</span> from, <span class="keywordtype">int</span> to)
00443 {
00444     QPointArray polyline(to - from + 1);
00445     <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = from; i &lt;= to; i++)
00446     {
00447         <span class="keywordtype">int</span> xi = xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a10">x</a>(i));
00448         <span class="keywordtype">int</span> yi = yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a11">y</a>(i));
00449 
00450         polyline.setPoint(i - from, xi, yi);
00451     }
00452 
00453     <a class="code" href="class_qwt_painter.html#e19">QwtPainter::drawPolyline</a>(painter, polyline);
00454 
00455     <span class="keywordflow">if</span> ( painter-&gt;brush().style() != Qt::NoBrush )
00456     {
00457         <a class="code" href="class_qwt_curve.html#b9">closePolyline</a>(xMap, yMap, polyline);
00458         painter-&gt;setPen(QPen(Qt::NoPen));
00459         <a class="code" href="class_qwt_painter.html#e18">QwtPainter::drawPolygon</a>(painter, polyline);
00460     }
00461 }
00462 
<a name="l00473"></a><a class="code" href="class_qwt_curve.html#b5">00473</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b5">QwtCurve::drawSticks</a>(QPainter *painter,
00474     <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;yMap, <span class="keywordtype">int</span> from, <span class="keywordtype">int</span> to)
00475 {
00476     <span class="keywordtype">int</span> x0 = xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(d_ref);
00477     <span class="keywordtype">int</span> y0 = yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(d_ref);
00478 
00479     <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = from; i &lt;= to; i++)
00480     {
00481         <span class="keywordtype">int</span> xi = xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a10">x</a>(i));
00482         <span class="keywordtype">int</span> yi = yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a11">y</a>(i));
00483 
00484         <span class="keywordflow">if</span> (d_options &amp; Xfy)
00485             <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(painter, x0, yi, xi, yi);
00486         <span class="keywordflow">else</span>
00487             <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(painter, xi, y0, xi, yi);
00488     }
00489 }
00490 
<a name="l00502"></a><a class="code" href="class_qwt_curve.html#b6">00502</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b6">QwtCurve::drawDots</a>(QPainter *painter,
00503     <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;yMap, <span class="keywordtype">int</span> from, <span class="keywordtype">int</span> to)
00504 {
00505     <span class="keyword">const</span> <span class="keywordtype">bool</span> doFill = painter-&gt;brush().style() != Qt::NoBrush;
00506 
00507     QPointArray polyline;
00508     <span class="keywordflow">if</span> ( doFill )
00509         polyline.resize(to - from + 1);
00510 
00511     <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = from; i &lt;= to; i++)
00512     {
00513         <span class="keywordtype">int</span> xi = xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a10">x</a>(i));
00514         <span class="keywordtype">int</span> yi = yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a11">y</a>(i));
00515         <a class="code" href="class_qwt_painter.html#e20">QwtPainter::drawPoint</a>(painter, xi, yi);
00516 
00517         <span class="keywordflow">if</span> ( doFill )
00518             polyline.setPoint(i - from, xi, yi);
00519     }
00520 
00521     <span class="keywordflow">if</span> ( doFill )
00522     {
00523         <a class="code" href="class_qwt_curve.html#b9">closePolyline</a>(xMap, yMap, polyline);
00524         painter-&gt;setPen(QPen(Qt::NoPen));
00525         <a class="code" href="class_qwt_painter.html#e18">QwtPainter::drawPolygon</a>(painter, polyline);
00526     }
00527 }
00528 
<a name="l00539"></a><a class="code" href="class_qwt_curve.html#b7">00539</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b7">QwtCurve::drawSteps</a>(QPainter *painter,
00540     <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;yMap, <span class="keywordtype">int</span> from, <span class="keywordtype">int</span> to)
00541 {
00542     QPointArray polyline(2 * (to - from) + 1);
00543 
00544     <span class="keywordtype">bool</span> inverted = d_options &amp; Yfx;
00545     <span class="keywordflow">if</span> ( d_options &amp; Inverted )
00546         inverted = !inverted;
00547 
00548     <span class="keywordtype">int</span> i,ip;
00549     <span class="keywordflow">for</span> (i = from, ip = 0; i &lt;= to; i++, ip += 2)
00550     {
00551         <span class="keywordtype">int</span> xi = xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a10">x</a>(i));
00552         <span class="keywordtype">int</span> yi = yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a11">y</a>(i));
00553 
00554         <span class="keywordflow">if</span> ( ip &gt; 0 )
00555         {
00556             <span class="keywordflow">if</span> (inverted)
00557                 polyline.setPoint(ip - 1, polyline[ip-2].<a class="code" href="class_qwt_curve.html#a10">x</a>(), yi);
00558             <span class="keywordflow">else</span>
00559                 polyline.setPoint(ip - 1, xi, polyline[ip-2].<a class="code" href="class_qwt_curve.html#a11">y</a>());
00560         }
00561 
00562         polyline.setPoint(ip, xi, yi);
00563     }
00564 
00565     <a class="code" href="class_qwt_painter.html#e19">QwtPainter::drawPolyline</a>(painter, polyline);
00566 
00567     <span class="keywordflow">if</span> ( painter-&gt;brush().style() != Qt::NoBrush )
00568     {
00569         <a class="code" href="class_qwt_curve.html#b9">closePolyline</a>(xMap, yMap, polyline);
00570         painter-&gt;setPen(QPen(Qt::NoPen));
00571         <a class="code" href="class_qwt_painter.html#e18">QwtPainter::drawPolygon</a>(painter, polyline);
00572     }
00573 }
00574 
<a name="l00583"></a><a class="code" href="class_qwt_curve.html#b8">00583</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b8">QwtCurve::drawSpline</a>(QPainter *painter,
00584     <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;yMap)
00585 {
00586     <span class="keyword">register</span> <span class="keywordtype">int</span> i;
00587 
00588     <span class="keywordtype">int</span> size = <a class="code" href="class_qwt_curve.html#a9">dataSize</a>();
00589     <span class="keywordtype">double</span> *txval = <span class="keyword">new</span> <span class="keywordtype">double</span>[size];
00590     <span class="keywordtype">double</span> *tyval = <span class="keyword">new</span> <span class="keywordtype">double</span>[size];
00591 
00592 
00593     <span class="keywordflow">if</span> ( !txval || !tyval )
00594     {
00595         <span class="keywordflow">if</span> (txval) <span class="keyword">delete</span>[] txval;
00596         <span class="keywordflow">if</span> (tyval) <span class="keyword">delete</span>[] tyval;
00597         <span class="keywordflow">return</span>;
00598     }
00599 
00600     QPointArray polyline(d_splineSize);
00601 
00602     <span class="comment">//</span>
00603     <span class="comment">// Transform x and y values to window coordinates</span>
00604     <span class="comment">// to avoid a distinction between linear and</span>
00605     <span class="comment">// logarithmic scales.</span>
00606     <span class="comment">//</span>
00607     <span class="keywordflow">for</span> (i=0;i&lt;size;i++)
00608     {
00609         txval[i] = xMap.<a class="code" href="class_qwt_di_map.html#a10">xTransform</a>(<a class="code" href="class_qwt_curve.html#a10">x</a>(i));
00610         tyval[i] = yMap.<a class="code" href="class_qwt_di_map.html#a10">xTransform</a>(<a class="code" href="class_qwt_curve.html#a11">y</a>(i));
00611     }
00612 
00613     <span class="keywordtype">int</span> stype;
00614     <span class="keywordflow">if</span> (! (d_options &amp; (Yfx|Xfy|Parametric)))
00615     {
00616         <span class="keywordflow">if</span> (qwtChkMono(txval, size))
00617         {
00618             stype = Yfx;
00619         }
00620         <span class="keywordflow">else</span>
00621         {
00622             <span class="keywordflow">if</span>(qwtChkMono(tyval, size))
00623             {
00624                 stype = Xfy;
00625             }
00626             <span class="keywordflow">else</span>
00627             {
00628                 stype = Parametric;
00629                 <span class="keywordflow">if</span> ( (d_options &amp; Periodic) ||
00630                     ( (<a class="code" href="class_qwt_curve.html#a10">x</a>(0) == <a class="code" href="class_qwt_curve.html#a10">x</a>(size-1))
00631                     &amp;&amp; (<a class="code" href="class_qwt_curve.html#a11">y</a>(0) == <a class="code" href="class_qwt_curve.html#a11">y</a>(size-1))))
00632                 {
00633                     stype |= Periodic;
00634                 }
00635             }
00636         }
00637     }
00638     <span class="keywordflow">else</span>
00639     {
00640         stype = d_options;
00641     }
00642 
00643     <span class="keywordflow">if</span> (stype &amp; Parametric)
00644     {
00645         <span class="keywordtype">double</span> *param = <span class="keyword">new</span> <span class="keywordtype">double</span>[size];
00646         <span class="keywordflow">if</span> (param)
00647         {
00648             <span class="comment">//</span>
00649             <span class="comment">// setup parameter vector</span>
00650             <span class="comment">//</span>
00651             param[0] = 0.0;
00652             <span class="keywordflow">for</span> (i=1; i&lt;size; i++)
00653             {
00654                 <span class="keywordtype">double</span> delta = sqrt( <a class="code" href="qwt__math_8h.html#a31">qwtSqr</a>(txval[i] - txval[i-1])
00655                               + <a class="code" href="qwt__math_8h.html#a31">qwtSqr</a>( tyval[i] - tyval[i-1]));
00656                 param[i] = param[i-1] + qwtMax(delta, 1.0);
00657             }
00658 
00659             <span class="comment">//</span>
00660             <span class="comment">// setup splines</span>
00661             <span class="keywordtype">int</span> rc = d_spx.<a class="code" href="class_qwt_spline.html#a3">recalc</a>(param, txval, size, stype &amp; Periodic);
00662             <span class="keywordflow">if</span> (!rc)
00663                 rc = d_spy.<a class="code" href="class_qwt_spline.html#a3">recalc</a>(param, tyval, size, stype &amp; Periodic);
00664 
00665             <span class="keywordflow">if</span> (rc)
00666             {
00667                 <a class="code" href="class_qwt_curve.html#b4">drawLines</a>(painter, xMap, yMap, 0, size - 1);
00668             }
00669             <span class="keywordflow">else</span>
00670             {
00671                 <span class="comment">// fill point array</span>
00672                 <span class="keywordtype">double</span> delta = param[size - 1] / double(d_splineSize-1);
00673                 <span class="keywordflow">for</span> (i=0;i&lt;d_splineSize;i++)
00674                 {
00675                     <span class="keywordtype">double</span> dtmp = delta * double(i);
00676                     polyline.setPoint(i, <span class="keywordtype">int</span>(floor (d_spx.<a class="code" href="class_qwt_spline.html#a2">value</a>(dtmp) + 0.5)),
00677                                   int(floor (d_spy.<a class="code" href="class_qwt_spline.html#a2">value</a>(dtmp) + 0.5)));
00678                 }
00679             }
00680 
00681             <span class="keyword">delete</span>[] param;
00682         }
00683     }
00684     <span class="keywordflow">else</span> <span class="keywordflow">if</span> (stype &amp; Xfy)
00685     {
00686         <span class="keywordflow">if</span> (tyval[size-1] &lt; tyval[0])
00687         {
00688             qwtTwistArray(txval, size);
00689             qwtTwistArray(tyval, size);
00690         }
00691 
00692         <span class="comment">// 1. Calculate spline coefficients</span>
00693         <span class="keywordtype">int</span> rc = d_spx.<a class="code" href="class_qwt_spline.html#a3">recalc</a>(tyval, txval, size, stype &amp; Periodic);
00694         <span class="keywordflow">if</span> (rc)                         <span class="comment">// an error occurred</span>
00695         {
00696             <a class="code" href="class_qwt_curve.html#b4">drawLines</a>(painter, xMap, yMap, 0, size - 1);
00697         }
00698         <span class="keywordflow">else</span>                            <span class="comment">// Spline OK</span>
00699         {
00700             <span class="keywordtype">double</span> ymin = qwtGetMin(tyval, size);
00701             <span class="keywordtype">double</span> ymax = qwtGetMax(tyval, size);
00702             <span class="keywordtype">double</span> delta = (ymax - ymin) / double(d_splineSize - 1);
00703 
00704             <span class="keywordflow">for</span> (i=0;i&lt;d_splineSize;i++)
00705             {
00706                 <span class="keywordtype">double</span> dtmp = ymin + delta * double(i);
00707                 polyline.setPoint(i, <span class="keywordtype">int</span>(floor(d_spx.<a class="code" href="class_qwt_spline.html#a2">value</a>(dtmp) + 0.5)),
00708                               int(floor(dtmp + 0.5)));
00709             }
00710         }
00711     }
00712     <span class="keywordflow">else</span>
00713     {
00714         <span class="keywordflow">if</span> (txval[size-1] &lt; txval[0])
00715         {
00716             qwtTwistArray(tyval, size);
00717             qwtTwistArray(txval, size);
00718         }
00719 
00720 
00721         <span class="comment">// 1. Calculate spline coefficients</span>
00722         <span class="keywordtype">int</span> rc = d_spy.<a class="code" href="class_qwt_spline.html#a3">recalc</a>(txval, tyval, size, stype &amp; Periodic);
00723         <span class="keywordflow">if</span> (rc)                         <span class="comment">// error</span>
00724         {
00725             <a class="code" href="class_qwt_curve.html#b4">drawLines</a>(painter, xMap, yMap, 0, size - 1);
00726         }
00727         <span class="keywordflow">else</span>                            <span class="comment">// Spline OK</span>
00728         {
00729             <span class="keywordtype">double</span> xmin = qwtGetMin(txval, size);
00730             <span class="keywordtype">double</span> xmax = qwtGetMax(txval, size);
00731             <span class="keywordtype">double</span> delta = (xmax - xmin) / double(d_splineSize - 1);
00732 
00733             <span class="keywordflow">for</span> (i=0;i&lt;d_splineSize;i++)
00734             {
00735                 <span class="keywordtype">double</span> dtmp = xmin + delta * double(i);
00736                 polyline.setPoint(i, <span class="keywordtype">int</span>(floor (dtmp + 0.5)),
00737                               <span class="keywordtype">int</span>(floor(d_spy.<a class="code" href="class_qwt_spline.html#a2">value</a>(dtmp) + 0.5)));
00738             }
00739         }
00740     }
00741 
00742     <span class="keyword">delete</span>[] txval;
00743     <span class="keyword">delete</span>[] tyval;
00744 
00745     <a class="code" href="class_qwt_painter.html#e19">QwtPainter::drawPolyline</a>(painter, polyline);
00746 
00747     <span class="keywordflow">if</span> ( painter-&gt;brush().style() != Qt::NoBrush )
00748     {
00749         <a class="code" href="class_qwt_curve.html#b9">closePolyline</a>(xMap, yMap, polyline);
00750         painter-&gt;setPen(QPen(Qt::NoPen));
00751         <a class="code" href="class_qwt_painter.html#e18">QwtPainter::drawPolygon</a>(painter, polyline);
00752     }
00753 }
00754 
<a name="l00785"></a><a class="code" href="class_qwt_curve.html#a17">00785</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a17">QwtCurve::setOptions</a>(<span class="keywordtype">int</span> opt)
00786 {
00787     d_options = opt;
00788     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00789 }
00790 
<a name="l00795"></a><a class="code" href="class_qwt_curve.html#a18">00795</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_curve.html#a18">QwtCurve::options</a>()<span class="keyword"> const </span>
00796 <span class="keyword"></span>{ 
00797     <span class="keywordflow">return</span> d_options; 
00798 }
00799 
<a name="l00805"></a><a class="code" href="class_qwt_curve.html#a31">00805</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a31">QwtCurve::setSplineSize</a>(<span class="keywordtype">int</span> s)
00806 {
00807     d_splineSize = qwtMax(s, 10);
00808     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00809 }
00810 
<a name="l00817"></a><a class="code" href="class_qwt_curve.html#a32">00817</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_curve.html#a32">QwtCurve::splineSize</a>()<span class="keyword"> const </span>
00818 <span class="keyword"></span>{ 
00819     <span class="keywordflow">return</span> d_splineSize; 
00820 }
00821 
<a name="l00831"></a><a class="code" href="class_qwt_curve.html#b9">00831</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b9">QwtCurve::closePolyline</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;yMap,
00832     QPointArray &amp;pa)<span class="keyword"> const</span>
00833 <span class="keyword"></span>{
00834     <span class="keyword">const</span> <span class="keywordtype">int</span> sz = pa.size();
00835     <span class="keywordflow">if</span> ( sz &lt; 2 )
00836         <span class="keywordflow">return</span>;
00837 
00838     pa.resize(sz + 2);
00839 
00840     <span class="keywordflow">if</span> ( d_options &amp; QwtCurve::Xfy )
00841     {
00842         pa.setPoint(sz,
00843             xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(d_ref), pa.point(sz - 1).y());
00844         pa.setPoint(sz + 1,
00845             xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(d_ref), pa.point(0).y());
00846     }
00847     <span class="keywordflow">else</span>
00848     {
00849         pa.setPoint(sz,
00850             pa.point(sz - 1).x(), yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(d_ref));
00851         pa.setPoint(pa.size() - 1,
00852             pa.point(0).x(), yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(d_ref));
00853     }
00854 }
00855 
<a name="l00865"></a><a class="code" href="class_qwt_curve.html#b3">00865</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b3">QwtCurve::drawSymbols</a>(QPainter *painter, <a class="code" href="class_qwt_symbol.html">QwtSymbol</a> &amp;symbol,
00866     <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;xMap, <span class="keyword">const</span> <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> &amp;yMap, <span class="keywordtype">int</span> from, <span class="keywordtype">int</span> to)
00867 {
00868     painter-&gt;setBrush(symbol.<a class="code" href="class_qwt_symbol.html#a10">brush</a>());
00869     painter-&gt;setPen(symbol.<a class="code" href="class_qwt_symbol.html#a11">pen</a>());
00870 
00871     QRect rect;
00872     rect.setSize(QwtPainter::metricsMap().screenToLayout(symbol.<a class="code" href="class_qwt_symbol.html#a12">size</a>()));
00873 
00874     <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = from; i &lt;= to; i++)
00875     {
00876         <span class="keyword">const</span> <span class="keywordtype">int</span> xi = xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a10">x</a>(i));
00877         <span class="keyword">const</span> <span class="keywordtype">int</span> yi = yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(<a class="code" href="class_qwt_curve.html#a11">y</a>(i));
00878 
00879         rect.moveCenter(QPoint(xi, yi));
00880         symbol.<a class="code" href="class_qwt_symbol.html#a14">draw</a>(painter, rect);
00881     }
00882 }
00883 
<a name="l00897"></a><a class="code" href="class_qwt_curve.html#a25">00897</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#a25">QwtCurve::setBaseline</a>(<span class="keywordtype">double</span> ref)
00898 {
00899     d_ref = ref;
00900     <a class="code" href="class_qwt_curve.html#b10">curveChanged</a>();
00901 }
00902 
<a name="l00907"></a><a class="code" href="class_qwt_curve.html#a26">00907</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_curve.html#a26">QwtCurve::baseline</a>()<span class="keyword"> const </span>
00908 <span class="keyword"></span>{ 
00909     <span class="keywordflow">return</span> d_ref; 
00910 }
00911 
<a name="l00915"></a><a class="code" href="class_qwt_curve.html#a9">00915</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_curve.html#a9">QwtCurve::dataSize</a>()<span class="keyword"> const</span>
00916 <span class="keyword"></span>{
00917     <span class="keywordflow">return</span> d_data-&gt;<a class="code" href="class_qwt_data.html#a3">size</a>();
00918 }
00919 
<a name="l00927"></a><a class="code" href="class_qwt_curve.html#b10">00927</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_curve.html#b10">QwtCurve::curveChanged</a>() 
00928 {
00929 }
</div></pre><hr size="1"><address style="align: right;"><small>Generated on Tue Nov 16 21:12:20 2004 for Qwt User's Guide by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0 ></a> 1.3.8 </small></address>
</body>
</html>