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<h1>qwt_scale_map.h</h1> </div>
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<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="preprocessor">#ifndef QWT_SCALE_MAP_H</span>
<a name="l00011"></a>00011 <span class="preprocessor"></span><span class="preprocessor">#define QWT_SCALE_MAP_H</span>
<a name="l00012"></a>00012 <span class="preprocessor"></span>
<a name="l00013"></a>00013 <span class="preprocessor">#include "qwt_global.h"</span>
<a name="l00014"></a>00014 <span class="preprocessor">#include "qwt_math.h"</span>
<a name="l00015"></a>00015
<a name="l00019"></a><a class="code" href="class_qwt_scale_transformation.html">00019</a> <span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a>
<a name="l00020"></a>00020 {
<a name="l00021"></a>00021 <span class="keyword">public</span>:
<a name="l00022"></a>00022 <span class="keyword">enum</span> Type
<a name="l00023"></a>00023 {
<a name="l00024"></a>00024 Linear,
<a name="l00025"></a>00025 Log10,
<a name="l00026"></a>00026
<a name="l00027"></a>00027 Other
<a name="l00028"></a>00028 };
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a>(Type type);
<a name="l00031"></a>00031 <span class="keyword">virtual</span> ~<a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a>();
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keyword">virtual</span> <span class="keywordtype">double</span> xForm(<span class="keywordtype">double</span> x, <span class="keywordtype">double</span> s1, <span class="keywordtype">double</span> s2,
<a name="l00034"></a>00034 <span class="keywordtype">double</span> p1, <span class="keywordtype">double</span> p2) <span class="keyword">const</span>;
<a name="l00035"></a>00035 <span class="keyword">virtual</span> <span class="keywordtype">double</span> invXForm(<span class="keywordtype">double</span> x, <span class="keywordtype">double</span> p1, <span class="keywordtype">double</span> p2,
<a name="l00036"></a>00036 <span class="keywordtype">double</span> s1, <span class="keywordtype">double</span> s2) <span class="keyword">const</span>;
<a name="l00037"></a>00037
<a name="l00038"></a>00038 Type type() <span class="keyword">const</span>;
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="keyword">virtual</span> <a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a> *copy() <span class="keyword">const</span>;
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="keyword">private</span>:
<a name="l00043"></a>00043 <a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a>();
<a name="l00044"></a>00044 <a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a> &operator=( <span class="keyword">const</span> <a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a>);
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="keyword">const</span> Type d_type;
<a name="l00047"></a>00047 };
<a name="l00048"></a>00048
<a name="l00050"></a><a class="code" href="class_qwt_scale_transformation.html#acc7714bb6b6dbdb588f8170aee700621">00050</a> <span class="keyword">inline</span> QwtScaleTransformation::Type <a class="code" href="class_qwt_scale_transformation.html#acc7714bb6b6dbdb588f8170aee700621">QwtScaleTransformation::type</a>()<span class="keyword"> const </span>
<a name="l00051"></a>00051 <span class="keyword"></span>{
<a name="l00052"></a>00052 <span class="keywordflow">return</span> d_type;
<a name="l00053"></a>00053 }
<a name="l00054"></a>00054
<a name="l00061"></a><a class="code" href="class_qwt_scale_map.html">00061</a> <span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a>
<a name="l00062"></a>00062 {
<a name="l00063"></a>00063 <span class="keyword">public</span>:
<a name="l00064"></a>00064 <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a>();
<a name="l00065"></a>00065 <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a>&);
<a name="l00066"></a>00066
<a name="l00067"></a>00067 ~<a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a>();
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &operator=(<span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &);
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="keywordtype">void</span> setTransformation(<a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a> * );
<a name="l00072"></a>00072 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a> *transformation() <span class="keyword">const</span>;
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keywordtype">void</span> setPaintInterval(<span class="keywordtype">int</span> p1, <span class="keywordtype">int</span> p2);
<a name="l00075"></a>00075 <span class="keywordtype">void</span> setPaintXInterval(<span class="keywordtype">double</span> p1, <span class="keywordtype">double</span> p2);
<a name="l00076"></a>00076 <span class="keywordtype">void</span> setScaleInterval(<span class="keywordtype">double</span> s1, <span class="keywordtype">double</span> s2);
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keywordtype">int</span> transform(<span class="keywordtype">double</span> x) <span class="keyword">const</span>;
<a name="l00079"></a>00079 <span class="keywordtype">double</span> invTransform(<span class="keywordtype">double</span> i) <span class="keyword">const</span>;
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="keywordtype">double</span> xTransform(<span class="keywordtype">double</span> x) <span class="keyword">const</span>;
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="keywordtype">double</span> p1() <span class="keyword">const</span>;
<a name="l00084"></a>00084 <span class="keywordtype">double</span> p2() <span class="keyword">const</span>;
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="keywordtype">double</span> s1() <span class="keyword">const</span>;
<a name="l00087"></a>00087 <span class="keywordtype">double</span> s2() <span class="keyword">const</span>;
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="keywordtype">double</span> pDist() <span class="keyword">const</span>;
<a name="l00090"></a>00090 <span class="keywordtype">double</span> sDist() <span class="keyword">const</span>;
<a name="l00091"></a>00091
<a name="l00092"></a>00092 QT_STATIC_CONST <span class="keywordtype">double</span> LogMin;
<a name="l00093"></a>00093 QT_STATIC_CONST <span class="keywordtype">double</span> LogMax;
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keyword">private</span>:
<a name="l00096"></a>00096 <span class="keywordtype">void</span> newFactor();
<a name="l00097"></a>00097
<a name="l00098"></a>00098 <span class="keywordtype">double</span> d_s1, d_s2; <span class="comment">// scale interval boundaries</span>
<a name="l00099"></a>00099 <span class="keywordtype">double</span> d_p1, d_p2; <span class="comment">// paint device interval boundaries</span>
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keywordtype">double</span> d_cnv; <span class="comment">// conversion factor</span>
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a> *d_transformation;
<a name="l00104"></a>00104 };
<a name="l00105"></a>00105
<a name="l00109"></a><a class="code" href="class_qwt_scale_map.html#a38b6a7040cd15a427f7631afa20cbad8">00109</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#a38b6a7040cd15a427f7631afa20cbad8">QwtScaleMap::s1</a>()<span class="keyword"> const </span>
<a name="l00110"></a>00110 <span class="keyword"></span>{
<a name="l00111"></a>00111 <span class="keywordflow">return</span> d_s1;
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113
<a name="l00117"></a><a class="code" href="class_qwt_scale_map.html#a644fe199eecf30fcd1803be554cd21f7">00117</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#a644fe199eecf30fcd1803be554cd21f7">QwtScaleMap::s2</a>()<span class="keyword"> const </span>
<a name="l00118"></a>00118 <span class="keyword"></span>{
<a name="l00119"></a>00119 <span class="keywordflow">return</span> d_s2;
<a name="l00120"></a>00120 }
<a name="l00121"></a>00121
<a name="l00125"></a><a class="code" href="class_qwt_scale_map.html#ac1ca2f9b4643d27fde693cc98bca0cd7">00125</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#ac1ca2f9b4643d27fde693cc98bca0cd7">QwtScaleMap::p1</a>()<span class="keyword"> const </span>
<a name="l00126"></a>00126 <span class="keyword"></span>{
<a name="l00127"></a>00127 <span class="keywordflow">return</span> d_p1;
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129
<a name="l00133"></a><a class="code" href="class_qwt_scale_map.html#acf404215292b10bd46b1089d2452b8e9">00133</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#acf404215292b10bd46b1089d2452b8e9">QwtScaleMap::p2</a>()<span class="keyword"> const </span>
<a name="l00134"></a>00134 <span class="keyword"></span>{
<a name="l00135"></a>00135 <span class="keywordflow">return</span> d_p2;
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137
<a name="l00141"></a><a class="code" href="class_qwt_scale_map.html#af364d4fa10db6f5dbc93d6ce763e603f">00141</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#af364d4fa10db6f5dbc93d6ce763e603f">QwtScaleMap::pDist</a>()<span class="keyword"> const</span>
<a name="l00142"></a>00142 <span class="keyword"></span>{
<a name="l00143"></a>00143 <span class="keywordflow">return</span> qwtAbs(d_p2 - d_p1);
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00149"></a><a class="code" href="class_qwt_scale_map.html#adf621246cfa7313280a35a44063972f3">00149</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#adf621246cfa7313280a35a44063972f3">QwtScaleMap::sDist</a>()<span class="keyword"> const</span>
<a name="l00150"></a>00150 <span class="keyword"></span>{
<a name="l00151"></a>00151 <span class="keywordflow">return</span> qwtAbs(d_s2 - d_s1);
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153
<a name="l00160"></a><a class="code" href="class_qwt_scale_map.html#a053cad00dd463f45c7e1591c9f2d8296">00160</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#a053cad00dd463f45c7e1591c9f2d8296">QwtScaleMap::xTransform</a>(<span class="keywordtype">double</span> s)<span class="keyword"> const</span>
<a name="l00161"></a>00161 <span class="keyword"></span>{
<a name="l00162"></a>00162 <span class="comment">// try to inline code from QwtScaleTransformation</span>
<a name="l00163"></a>00163
<a name="l00164"></a>00164 <span class="keywordflow">if</span> ( d_transformation-><a class="code" href="class_qwt_scale_transformation.html#acc7714bb6b6dbdb588f8170aee700621">type</a>() == QwtScaleTransformation::Linear )
<a name="l00165"></a>00165 <span class="keywordflow">return</span> d_p1 + (s - d_s1) * d_cnv;
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="keywordflow">if</span> ( d_transformation-><a class="code" href="class_qwt_scale_transformation.html#acc7714bb6b6dbdb588f8170aee700621">type</a>() == QwtScaleTransformation::Log10 )
<a name="l00168"></a>00168 <span class="keywordflow">return</span> d_p1 + log(s / d_s1) * d_cnv;
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="keywordflow">return</span> d_transformation-><a class="code" href="class_qwt_scale_transformation.html#a54768a41cd5d7867e74c0d0032e45ec2" title="Transform a value from the coordinate system of a scale into the coordinate system of the paint devic...">xForm</a>(s, d_s1, d_s2, d_p1, d_p2 );
<a name="l00171"></a>00171 }
<a name="l00172"></a>00172
<a name="l00180"></a><a class="code" href="class_qwt_scale_map.html#a0df4d78da09fa88d1063554542c7fb03">00180</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#a0df4d78da09fa88d1063554542c7fb03">QwtScaleMap::invTransform</a>(<span class="keywordtype">double</span> p)<span class="keyword"> const</span>
<a name="l00181"></a>00181 <span class="keyword"></span>{
<a name="l00182"></a>00182 <span class="keywordflow">return</span> d_transformation-><a class="code" href="class_qwt_scale_transformation.html#a366820cc9adb6678b2b613b8a7bc5fc7" title="Transform a value from the coordinate system of the paint device into the coordinate system of a scal...">invXForm</a>(p, d_p1, d_p2, d_s1, d_s2 );
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184
<a name="l00193"></a><a class="code" href="class_qwt_scale_map.html#a1ddda39f41e137560e625a8c66c1d2e1">00193</a> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_map.html#a1ddda39f41e137560e625a8c66c1d2e1">QwtScaleMap::transform</a>(<span class="keywordtype">double</span> s)<span class="keyword"> const</span>
<a name="l00194"></a>00194 <span class="keyword"></span>{
<a name="l00195"></a>00195 <span class="keywordflow">return</span> qRound(<a class="code" href="class_qwt_scale_map.html#a053cad00dd463f45c7e1591c9f2d8296">xTransform</a>(s));
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197
<a name="l00198"></a>00198 <span class="preprocessor">#endif</span>
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