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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Qwt User's Guide: qwt_data.cpp Source File</title>
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<div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical List</a> | <a class="qindex" href="annotated.html">Class List</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Class Members</a> | <a class="qindex" href="globals.html">File Members</a> | <a class="qindex" href="pages.html">Related Pages</a></div>
<h1>qwt_data.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="comment">// vim: expandtab</span>
00011
00012 <span class="preprocessor">#include "qwt_data.h"</span>
00013
00014 QwtData::QwtData()
00015 {
00016 }
00017
00018 QwtData::~QwtData()
00019 {
00020 }
00021
<a name="l00033"></a><a class="code" href="class_qwt_data.html#a6">00033</a> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a> <a class="code" href="class_qwt_data.html#a6">QwtData::boundingRect</a>()<span class="keyword"> const</span>
00034 <span class="keyword"></span>{
00035 <span class="keyword">const</span> size_t sz = <a class="code" href="class_qwt_data.html#a3">size</a>();
00036
00037 <span class="keywordflow">if</span> ( sz <= 0 )
00038 <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>
00039
00040 <span class="keywordtype">double</span> minX, maxX, minY, maxY;
00041 minX = maxX = <a class="code" href="class_qwt_data.html#a4">x</a>(0);
00042 minY = maxY = <a class="code" href="class_qwt_data.html#a5">y</a>(0);
00043
00044 <span class="keywordflow">for</span> ( size_t i = 1; i < sz; i++ )
00045 {
00046 <span class="keyword">const</span> <span class="keywordtype">double</span> xv = <a class="code" href="class_qwt_data.html#a4">x</a>(i);
00047 <span class="keywordflow">if</span> ( xv < minX )
00048 minX = xv;
00049 <span class="keywordflow">if</span> ( xv > maxX )
00050 maxX = xv;
00051
00052 <span class="keyword">const</span> <span class="keywordtype">double</span> yv = <a class="code" href="class_qwt_data.html#a5">y</a>(i);
00053 <span class="keywordflow">if</span> ( yv < minY )
00054 minY = yv;
00055 <span class="keywordflow">if</span> ( yv > maxY )
00056 maxY = yv;
00057 }
00058 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a>(minX, maxX, minY, maxY);
00059 }
00060
<a name="l00061"></a><a class="code" href="class_qwt_double_point_data.html#a0">00061</a> <a class="code" href="class_qwt_double_point_data.html#a0">QwtDoublePointData::QwtDoublePointData</a>(<span class="keyword">const</span> QwtArray<QwtDoublePoint> &data):
00062 d_data(data)
00063 {
00064 }
00065
<a name="l00067"></a><a class="code" href="class_qwt_double_point_data.html#a1">00067</a> <a class="code" href="class_qwt_double_point_data.html">QwtDoublePointData</a>& <a class="code" href="class_qwt_double_point_data.html#a1">QwtDoublePointData::operator=</a>(
00068 <span class="keyword">const</span> <a class="code" href="class_qwt_double_point_data.html">QwtDoublePointData</a> &data)
00069 {
00070 <span class="keywordflow">if</span> (<span class="keyword">this</span> != &data)
00071 {
00072 d_data = data.<a class="code" href="class_qwt_double_point_data.html#r0">d_data</a>;
00073 }
00074 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00075 }
00076
<a name="l00077"></a><a class="code" href="class_qwt_double_point_data.html#a3">00077</a> size_t <a class="code" href="class_qwt_double_point_data.html#a3">QwtDoublePointData::size</a>()<span class="keyword"> const </span>
00078 <span class="keyword"></span>{
00079 <span class="keywordflow">return</span> d_data.size();
00080 }
00081
<a name="l00082"></a><a class="code" href="class_qwt_double_point_data.html#a4">00082</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_point_data.html#a4">QwtDoublePointData::x</a>(size_t i)<span class="keyword"> const </span>
00083 <span class="keyword"></span>{
00084 <span class="keywordflow">return</span> d_data[int(i)].x();
00085 }
00086
<a name="l00087"></a><a class="code" href="class_qwt_double_point_data.html#a5">00087</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_point_data.html#a5">QwtDoublePointData::y</a>(size_t i)<span class="keyword"> const </span>
00088 <span class="keyword"></span>{
00089 <span class="keywordflow">return</span> d_data[int(i)].y();
00090 }
00091
<a name="l00092"></a><a class="code" href="class_qwt_double_point_data.html#a2">00092</a> <a class="code" href="class_qwt_data.html">QwtData</a> *<a class="code" href="class_qwt_double_point_data.html#a2">QwtDoublePointData::copy</a>()<span class="keyword"> const </span>
00093 <span class="keyword"></span>{
00094 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_double_point_data.html#a0">QwtDoublePointData</a>(d_data);
00095 }
00096
<a name="l00102"></a><a class="code" href="class_qwt_array_data.html#a0">00102</a> <a class="code" href="class_qwt_array_data.html#a0">QwtArrayData::QwtArrayData</a>(
00103 <span class="keyword">const</span> QwtArray<double> &x, <span class="keyword">const</span> QwtArray<double> &y): d_x(x), d_y(y)
00104 {
00105 }
00106
<a name="l00112"></a><a class="code" href="class_qwt_array_data.html#a1">00112</a> <a class="code" href="class_qwt_array_data.html#a0">QwtArrayData::QwtArrayData</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> *x, <span class="keyword">const</span> <span class="keywordtype">double</span> *y, size_t size)
00113 {
00114 d_x.detach();
00115 d_x.duplicate(x, size);
00116 d_y.detach();
00117 d_y.duplicate(y, size);
00118 }
00119
<a name="l00121"></a><a class="code" href="class_qwt_array_data.html#a2">00121</a> <a class="code" href="class_qwt_array_data.html">QwtArrayData</a>& <a class="code" href="class_qwt_array_data.html#a2">QwtArrayData::operator=</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_array_data.html">QwtArrayData</a> &data)
00122 {
00123 <span class="keywordflow">if</span> (<span class="keyword">this</span> != &data)
00124 {
00125 d_x = data.<a class="code" href="class_qwt_array_data.html#r0">d_x</a>;
00126 d_y = data.<a class="code" href="class_qwt_array_data.html#r1">d_y</a>;
00127 }
00128 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00129 }
00130
<a name="l00131"></a><a class="code" href="class_qwt_array_data.html#a4">00131</a> size_t <a class="code" href="class_qwt_array_data.html#a4">QwtArrayData::size</a>()<span class="keyword"> const </span>
00132 <span class="keyword"></span>{
00133 <span class="keywordflow">return</span> QMIN(d_x.size(), d_y.size());
00134 }
00135
<a name="l00136"></a><a class="code" href="class_qwt_array_data.html#a5">00136</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_array_data.html#a5">QwtArrayData::x</a>(size_t i)<span class="keyword"> const </span>
00137 <span class="keyword"></span>{
00138 <span class="keywordflow">return</span> d_x[int(i)];
00139 }
00140
<a name="l00141"></a><a class="code" href="class_qwt_array_data.html#a6">00141</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_array_data.html#a6">QwtArrayData::y</a>(size_t i)<span class="keyword"> const </span>
00142 <span class="keyword"></span>{
00143 <span class="keywordflow">return</span> d_y[int(i)];
00144 }
00145
<a name="l00146"></a><a class="code" href="class_qwt_array_data.html#a3">00146</a> <a class="code" href="class_qwt_data.html">QwtData</a> *<a class="code" href="class_qwt_array_data.html#a3">QwtArrayData::copy</a>()<span class="keyword"> const </span>
00147 <span class="keyword"></span>{
00148 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_array_data.html#a0">QwtArrayData</a>(d_x, d_y);
00149 }
00150
<a name="l00156"></a><a class="code" href="class_qwt_array_data.html#a7">00156</a> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a> <a class="code" href="class_qwt_array_data.html#a7">QwtArrayData::boundingRect</a>()<span class="keyword"> const</span>
00157 <span class="keyword"></span>{
00158 <span class="keyword">const</span> size_t sz = <a class="code" href="class_qwt_array_data.html#a4">size</a>();
00159
00160 <span class="keywordflow">if</span> ( sz <= 0 )
00161 <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>
00162
00163 <span class="keywordtype">double</span> minX, maxX, minY, maxY;
00164 QwtArray<double>::ConstIterator xIt = d_x.begin();
00165 QwtArray<double>::ConstIterator yIt = d_y.begin();
00166 QwtArray<double>::ConstIterator end = d_x.begin() + sz;
00167 minX = maxX = *xIt++;
00168 minY = maxY = *yIt++;
00169
00170 <span class="keywordflow">while</span> ( xIt < end )
00171 {
00172 <span class="keyword">const</span> <span class="keywordtype">double</span> xv = *xIt++;
00173 <span class="keywordflow">if</span> ( xv < minX )
00174 minX = xv;
00175 <span class="keywordflow">if</span> ( xv > maxX )
00176 maxX = xv;
00177
00178 <span class="keyword">const</span> <span class="keywordtype">double</span> yv = *yIt++;
00179 <span class="keywordflow">if</span> ( yv < minY )
00180 minY = yv;
00181 <span class="keywordflow">if</span> ( yv > maxY )
00182 maxY = yv;
00183 }
00184 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a>(minX, maxX, minY, maxY);
00185 }
00186
<a name="l00187"></a><a class="code" href="class_qwt_c_pointer_data.html#a0">00187</a> <a class="code" href="class_qwt_c_pointer_data.html#a0">QwtCPointerData::QwtCPointerData</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> *x, <span class="keyword">const</span> <span class="keywordtype">double</span> *y,
00188 size_t size):
00189 d_x(x), d_y(y), d_size(size)
00190 {
00191 }
00192
<a name="l00194"></a><a class="code" href="class_qwt_c_pointer_data.html#a1">00194</a> <a class="code" href="class_qwt_c_pointer_data.html">QwtCPointerData</a>& <a class="code" href="class_qwt_c_pointer_data.html#a1">QwtCPointerData::operator=</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_c_pointer_data.html">QwtCPointerData</a> &data)
00195 {
00196 <span class="keywordflow">if</span> (<span class="keyword">this</span> != &data)
00197 {
00198 d_x = data.<a class="code" href="class_qwt_c_pointer_data.html#r0">d_x</a>;
00199 d_y = data.<a class="code" href="class_qwt_c_pointer_data.html#r1">d_y</a>;
00200 d_size = data.<a class="code" href="class_qwt_c_pointer_data.html#r2">d_size</a>;
00201 }
00202 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
00203 }
00204
<a name="l00205"></a><a class="code" href="class_qwt_c_pointer_data.html#a3">00205</a> size_t <a class="code" href="class_qwt_c_pointer_data.html#a3">QwtCPointerData::size</a>()<span class="keyword"> const </span>
00206 <span class="keyword"></span>{
00207 <span class="keywordflow">return</span> d_size;
00208 }
00209
<a name="l00210"></a><a class="code" href="class_qwt_c_pointer_data.html#a4">00210</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_c_pointer_data.html#a4">QwtCPointerData::x</a>(size_t i)<span class="keyword"> const </span>
00211 <span class="keyword"></span>{
00212 <span class="keywordflow">return</span> d_x[int(i)];
00213 }
00214
<a name="l00215"></a><a class="code" href="class_qwt_c_pointer_data.html#a5">00215</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_c_pointer_data.html#a5">QwtCPointerData::y</a>(size_t i)<span class="keyword"> const </span>
00216 <span class="keyword"></span>{
00217 <span class="keywordflow">return</span> d_y[int(i)];
00218 }
00219
<a name="l00220"></a><a class="code" href="class_qwt_c_pointer_data.html#a2">00220</a> <a class="code" href="class_qwt_data.html">QwtData</a> *<a class="code" href="class_qwt_c_pointer_data.html#a2">QwtCPointerData::copy</a>()<span class="keyword"> const </span>
00221 <span class="keyword"></span>{
00222 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_c_pointer_data.html#a0">QwtCPointerData</a>(d_x, d_y, d_size);
00223 }
00224
<a name="l00230"></a><a class="code" href="class_qwt_c_pointer_data.html#a6">00230</a> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a> <a class="code" href="class_qwt_c_pointer_data.html#a6">QwtCPointerData::boundingRect</a>()<span class="keyword"> const</span>
00231 <span class="keyword"></span>{
00232 <span class="keyword">const</span> size_t sz = <a class="code" href="class_qwt_c_pointer_data.html#a3">size</a>();
00233
00234 <span class="keywordflow">if</span> ( sz <= 0 )
00235 <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>
00236
00237 <span class="keywordtype">double</span> minX, maxX, minY, maxY;
00238 <span class="keyword">const</span> <span class="keywordtype">double</span> *xIt = d_x;
00239 <span class="keyword">const</span> <span class="keywordtype">double</span> *yIt = d_y;
00240 <span class="keyword">const</span> <span class="keywordtype">double</span> *end = d_x + sz;
00241 minX = maxX = *xIt++;
00242 minY = maxY = *yIt++;
00243
00244 <span class="keywordflow">while</span> ( xIt < end )
00245 {
00246 <span class="keyword">const</span> <span class="keywordtype">double</span> xv = *xIt++;
00247 <span class="keywordflow">if</span> ( xv < minX )
00248 minX = xv;
00249 <span class="keywordflow">if</span> ( xv > maxX )
00250 maxX = xv;
00251
00252 <span class="keyword">const</span> <span class="keywordtype">double</span> yv = *yIt++;
00253 <span class="keywordflow">if</span> ( yv < minY )
00254 minY = yv;
00255 <span class="keywordflow">if</span> ( yv > maxY )
00256 maxY = yv;
00257 }
00258 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a>(minX, maxX, minY, maxY);
00259 }
00260
00261 <span class="comment">// Local Variables:</span>
00262 <span class="comment">// mode: C++</span>
00263 <span class="comment">// c-file-style: "stroustrup"</span>
00264 <span class="comment">// indent-tabs-mode: nil</span>
00265 <span class="comment">// End:</span>
</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
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