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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 <span class="preprocessor">#ifndef QT_NO_DEBUG_STREAM</span>
<a name="l00016"></a>00016 <span class="preprocessor"></span><span class="preprocessor">#include <qdebug.h></span>
<a name="l00017"></a>00017 <span class="preprocessor">#endif</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span>
<a name="l00019"></a>00019 <span class="keyword">class </span>QRectF;
<a name="l00020"></a>00020
<a name="l00028"></a><a class="code" href="class_qwt_scale_transformation.html">00028</a> <span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a>
<a name="l00029"></a>00029 {
<a name="l00030"></a>00030 <span class="keyword">public</span>:
<a name="l00032"></a><a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786">00032</a> <span class="keyword">enum</span> <a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786" title="Transformation type.">Type</a>
<a name="l00033"></a>00033 {
<a name="l00035"></a><a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786a77fdca4fe1efe2e60f6f0d6d730c6075">00035</a> <a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786a77fdca4fe1efe2e60f6f0d6d730c6075" title="Transformation between 2 linear scales.">Linear</a>,
<a name="l00036"></a>00036
<a name="l00038"></a><a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786afd481a493e9324d472f2dd064f35f634">00038</a> <a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786afd481a493e9324d472f2dd064f35f634" title="Transformation between a linear and a logarithmic ( base 10 ) scale.">Log10</a>,
<a name="l00039"></a>00039
<a name="l00041"></a><a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786a0bff96a69468f488f8096a3e12c9316c">00041</a> Other
<a name="l00042"></a>00042 };
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a>( Type type );
<a name="l00045"></a>00045 <span class="keyword">virtual</span> ~<a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a>();
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <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="l00048"></a>00048 <span class="keywordtype">double</span> p1, <span class="keywordtype">double</span> p2 ) <span class="keyword">const</span>;
<a name="l00049"></a>00049 <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="l00050"></a>00050 <span class="keywordtype">double</span> s1, <span class="keywordtype">double</span> s2 ) <span class="keyword">const</span>;
<a name="l00051"></a>00051
<a name="l00052"></a>00052 Type type() <span class="keyword">const</span>;
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="keyword">virtual</span> <a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a> *copy() <span class="keyword">const</span>;
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="keyword">private</span>:
<a name="l00057"></a>00057 <a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a>();
<a name="l00058"></a>00058 <a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a> &operator=( <span class="keyword">const</span> <a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a> );
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="keyword">const</span> Type d_type;
<a name="l00061"></a>00061 };
<a name="l00062"></a>00062
<a name="l00064"></a><a class="code" href="class_qwt_scale_transformation.html#acc7714bb6b6dbdb588f8170aee700621">00064</a> <span class="keyword">inline</span> <a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786" title="Transformation type.">QwtScaleTransformation::Type</a> <a class="code" href="class_qwt_scale_transformation.html#acc7714bb6b6dbdb588f8170aee700621">QwtScaleTransformation::type</a>()<span class="keyword"> const</span>
<a name="l00065"></a>00065 <span class="keyword"></span>{
<a name="l00066"></a>00066 <span class="keywordflow">return</span> d_type;
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068
<a name="l00076"></a><a class="code" href="class_qwt_scale_map.html">00076</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="l00077"></a>00077 {
<a name="l00078"></a>00078 <span class="keyword">public</span>:
<a name="l00079"></a>00079 <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a>();
<a name="l00080"></a>00080 <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="l00081"></a>00081
<a name="l00082"></a>00082 ~<a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a>();
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <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="l00085"></a>00085
<a name="l00086"></a>00086 <span class="keywordtype">void</span> setTransformation( <a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a> * );
<a name="l00087"></a>00087 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a> *transformation() <span class="keyword">const</span>;
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="keywordtype">void</span> setPaintInterval( <span class="keywordtype">double</span> p1, <span class="keywordtype">double</span> p2 );
<a name="l00090"></a>00090 <span class="keywordtype">void</span> setScaleInterval( <span class="keywordtype">double</span> s1, <span class="keywordtype">double</span> s2 );
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="keywordtype">double</span> transform( <span class="keywordtype">double</span> s ) <span class="keyword">const</span>;
<a name="l00093"></a>00093 <span class="keywordtype">double</span> invTransform( <span class="keywordtype">double</span> p ) <span class="keyword">const</span>;
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keywordtype">double</span> p1() <span class="keyword">const</span>;
<a name="l00096"></a>00096 <span class="keywordtype">double</span> p2() <span class="keyword">const</span>;
<a name="l00097"></a>00097
<a name="l00098"></a>00098 <span class="keywordtype">double</span> s1() <span class="keyword">const</span>;
<a name="l00099"></a>00099 <span class="keywordtype">double</span> s2() <span class="keyword">const</span>;
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keywordtype">double</span> pDist() <span class="keyword">const</span>;
<a name="l00102"></a>00102 <span class="keywordtype">double</span> sDist() <span class="keyword">const</span>;
<a name="l00103"></a>00103
<a name="l00104"></a><a class="code" href="class_qwt_scale_map.html#adacf5fdb36940d39929993083f6cb64b">00104</a> QT_STATIC_CONST <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#adacf5fdb36940d39929993083f6cb64b" title="Smallest allowed value for logarithmic scales: 1.0e-150.">LogMin</a>;
<a name="l00105"></a><a class="code" href="class_qwt_scale_map.html#a0f06d4698bcb8af2200e37609b4b88c4">00105</a> QT_STATIC_CONST <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#a0f06d4698bcb8af2200e37609b4b88c4" title="Largest allowed value for logarithmic scales: 1.0e150.">LogMax</a>;
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="keyword">static</span> QRectF transform( <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &,
<a name="l00108"></a>00108 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &, <span class="keyword">const</span> QRectF & );
<a name="l00109"></a>00109 <span class="keyword">static</span> QRectF invTransform( <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &,
<a name="l00110"></a>00110 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &, <span class="keyword">const</span> QRectF & );
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="keyword">static</span> QPointF transform( <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &,
<a name="l00113"></a>00113 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &, <span class="keyword">const</span> QPointF & );
<a name="l00114"></a>00114 <span class="keyword">static</span> QPointF invTransform( <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &,
<a name="l00115"></a>00115 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> &, <span class="keyword">const</span> QPointF & );
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="keywordtype">bool</span> isInverting() <span class="keyword">const</span>;
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="keyword">private</span>:
<a name="l00120"></a>00120 <span class="keywordtype">void</span> newFactor();
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="keywordtype">double</span> d_s1, d_s2; <span class="comment">// scale interval boundaries</span>
<a name="l00123"></a>00123 <span class="keywordtype">double</span> d_p1, d_p2; <span class="comment">// paint device interval boundaries</span>
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="keywordtype">double</span> d_cnv; <span class="comment">// conversion factor</span>
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <a class="code" href="class_qwt_scale_transformation.html" title="A transformation between coordinate systems.">QwtScaleTransformation</a> *d_transformation;
<a name="l00128"></a>00128 };
<a name="l00129"></a>00129
<a name="l00133"></a><a class="code" href="class_qwt_scale_map.html#a38b6a7040cd15a427f7631afa20cbad8">00133</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="l00134"></a>00134 <span class="keyword"></span>{
<a name="l00135"></a>00135 <span class="keywordflow">return</span> d_s1;
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137
<a name="l00141"></a><a class="code" href="class_qwt_scale_map.html#a644fe199eecf30fcd1803be554cd21f7">00141</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="l00142"></a>00142 <span class="keyword"></span>{
<a name="l00143"></a>00143 <span class="keywordflow">return</span> d_s2;
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00149"></a><a class="code" href="class_qwt_scale_map.html#ac1ca2f9b4643d27fde693cc98bca0cd7">00149</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="l00150"></a>00150 <span class="keyword"></span>{
<a name="l00151"></a>00151 <span class="keywordflow">return</span> d_p1;
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153
<a name="l00157"></a><a class="code" href="class_qwt_scale_map.html#acf404215292b10bd46b1089d2452b8e9">00157</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="l00158"></a>00158 <span class="keyword"></span>{
<a name="l00159"></a>00159 <span class="keywordflow">return</span> d_p2;
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161
<a name="l00165"></a><a class="code" href="class_qwt_scale_map.html#af364d4fa10db6f5dbc93d6ce763e603f">00165</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="l00166"></a>00166 <span class="keyword"></span>{
<a name="l00167"></a>00167 <span class="keywordflow">return</span> qAbs( d_p2 - d_p1 );
<a name="l00168"></a>00168 }
<a name="l00169"></a>00169
<a name="l00173"></a><a class="code" href="class_qwt_scale_map.html#adf621246cfa7313280a35a44063972f3">00173</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="l00174"></a>00174 <span class="keyword"></span>{
<a name="l00175"></a>00175 <span class="keywordflow">return</span> qAbs( d_s2 - d_s1 );
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177
<a name="l00184"></a><a class="code" href="class_qwt_scale_map.html#ab77cbd649a65b080c3ff21d7abce7f73">00184</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#ab77cbd649a65b080c3ff21d7abce7f73">QwtScaleMap::transform</a>( <span class="keywordtype">double</span> s )<span class="keyword"> const</span>
<a name="l00185"></a>00185 <span class="keyword"></span>{
<a name="l00186"></a>00186 <span class="comment">// try to inline code from QwtScaleTransformation</span>
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <span class="keywordflow">if</span> ( d_transformation-><a class="code" href="class_qwt_scale_transformation.html#acc7714bb6b6dbdb588f8170aee700621">type</a>() == <a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786a77fdca4fe1efe2e60f6f0d6d730c6075" title="Transformation between 2 linear scales.">QwtScaleTransformation::Linear</a> )
<a name="l00189"></a>00189 <span class="keywordflow">return</span> d_p1 + ( s - d_s1 ) * d_cnv;
<a name="l00190"></a>00190
<a name="l00191"></a>00191 <span class="keywordflow">if</span> ( d_transformation-><a class="code" href="class_qwt_scale_transformation.html#acc7714bb6b6dbdb588f8170aee700621">type</a>() == <a class="code" href="class_qwt_scale_transformation.html#a5b4e85a0640906586b3180872aaeb786afd481a493e9324d472f2dd064f35f634" title="Transformation between a linear and a logarithmic ( base 10 ) scale.">QwtScaleTransformation::Log10</a> )
<a name="l00192"></a>00192 <span class="keywordflow">return</span> d_p1 + log( s / d_s1 ) * d_cnv;
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <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="l00195"></a>00195 }
<a name="l00196"></a>00196
<a name="l00204"></a><a class="code" href="class_qwt_scale_map.html#a9f973f23b61ed18dd7598255078bd837">00204</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#a9f973f23b61ed18dd7598255078bd837">QwtScaleMap::invTransform</a>( <span class="keywordtype">double</span> p )<span class="keyword"> const</span>
<a name="l00205"></a>00205 <span class="keyword"></span>{
<a name="l00206"></a>00206 <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="l00207"></a>00207 }
<a name="l00208"></a>00208
<a name="l00210"></a><a class="code" href="class_qwt_scale_map.html#aee1376468f91fa74715a0cad6cf1f6dc">00210</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_scale_map.html#aee1376468f91fa74715a0cad6cf1f6dc">QwtScaleMap::isInverting</a>()<span class="keyword"> const</span>
<a name="l00211"></a>00211 <span class="keyword"></span>{
<a name="l00212"></a>00212 <span class="keywordflow">return</span> ( ( d_p1 < d_p2 ) != ( d_s1 < d_s2 ) );
<a name="l00213"></a>00213 }
<a name="l00214"></a>00214
<a name="l00215"></a>00215 <span class="preprocessor">#ifndef QT_NO_DEBUG_STREAM</span>
<a name="l00216"></a>00216 <span class="preprocessor"></span>QWT_EXPORT QDebug operator<<( QDebug, <span class="keyword">const</span> <a class="code" href="class_qwt_scale_map.html" title="A scale map.">QwtScaleMap</a> & );
<a name="l00217"></a>00217 <span class="preprocessor">#endif</span>
<a name="l00218"></a>00218 <span class="preprocessor"></span>
<a name="l00219"></a>00219 <span class="preprocessor">#endif</span>
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