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<h1>qwt_scale_map.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span>
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<a name="l00002"></a>00002 <span class="comment"> * Qwt Widget Library</span>
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<a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 1997 Josef Wilgen</span>
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<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2002 Uwe Rathmann</span>
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<a name="l00005"></a>00005 <span class="comment"> * </span>
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<a name="l00006"></a>00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
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<a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span>
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<a name="l00008"></a>00008 <span class="comment"> *****************************************************************************/</span>
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<a name="l00009"></a>00009
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<a name="l00010"></a>00010 <span class="preprocessor">#ifndef QWT_SCALE_MAP_H</span>
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<a name="l00011"></a>00011 <span class="preprocessor"></span><span class="preprocessor">#define QWT_SCALE_MAP_H</span>
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<a name="l00012"></a>00012 <span class="preprocessor"></span>
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<a name="l00013"></a>00013 <span class="preprocessor">#include "qwt_global.h"</span>
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<a name="l00014"></a>00014 <span class="preprocessor">#include "qwt_math.h"</span>
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<a name="l00015"></a>00015
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<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">QwtScaleTransformation</a>
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<a name="l00020"></a>00020 {
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<a name="l00021"></a>00021 <span class="keyword">public</span>:
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<a name="l00022"></a><a class="code" href="class_qwt_scale_transformation.html#5b4e85a0640906586b3180872aaeb786">00022</a> <span class="keyword">enum</span> <a class="code" href="class_qwt_scale_transformation.html#5b4e85a0640906586b3180872aaeb786">Type</a>
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<a name="l00023"></a>00023 {
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<a name="l00024"></a>00024 Linear,
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<a name="l00025"></a>00025 Log10,
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<a name="l00026"></a>00026
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<a name="l00027"></a>00027 Other
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<a name="l00028"></a>00028 };
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<a name="l00029"></a>00029
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<a name="l00030"></a>00030 <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a>(Type type);
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<a name="l00031"></a>00031 <span class="keyword">virtual</span> ~<a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a>();
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<a name="l00032"></a>00032
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<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,
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<a name="l00034"></a>00034 <span class="keywordtype">double</span> p1, <span class="keywordtype">double</span> p2) <span class="keyword">const</span>;
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<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> s1, <span class="keywordtype">double</span> s2,
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<a name="l00036"></a>00036 <span class="keywordtype">double</span> p1, <span class="keywordtype">double</span> p2) <span class="keyword">const</span>;
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<a name="l00037"></a>00037
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<a name="l00038"></a><a class="code" href="class_qwt_scale_transformation.html#8b8936e303f55241599ccbf358ab9215">00038</a> <span class="keyword">inline</span> <a class="code" href="class_qwt_scale_transformation.html#5b4e85a0640906586b3180872aaeb786">Type</a> type()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_type; }
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<a name="l00039"></a>00039
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<a name="l00040"></a>00040 <span class="keyword">virtual</span> <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> *copy() <span class="keyword">const</span>;
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<a name="l00041"></a>00041
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<a name="l00042"></a>00042 <span class="keyword">private</span>:
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<a name="l00043"></a>00043 <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a>();
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<a name="l00044"></a>00044 <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> &operator=( <span class="keyword">const</span> <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a>);
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<a name="l00045"></a>00045
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<a name="l00046"></a>00046 <span class="keyword">const</span> Type d_type;
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<a name="l00047"></a>00047 };
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<a name="l00048"></a>00048
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<a name="l00055"></a><a class="code" href="class_qwt_scale_map.html">00055</a> <span class="keyword">class </span>QWT_EXPORT QwtScaleMap
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<a name="l00056"></a>00056 {
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<a name="l00057"></a>00057 <span class="keyword">public</span>:
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<a name="l00058"></a>00058 QwtScaleMap();
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<a name="l00059"></a>00059 QwtScaleMap(<span class="keyword">const</span> QwtScaleMap&);
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<a name="l00060"></a>00060
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<a name="l00061"></a>00061 ~QwtScaleMap();
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<a name="l00062"></a>00062
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<a name="l00063"></a>00063 QwtScaleMap &operator=(<span class="keyword">const</span> QwtScaleMap &);
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<a name="l00064"></a>00064
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<a name="l00065"></a>00065 <span class="keywordtype">void</span> setTransformation(<a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> * );
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<a name="l00066"></a>00066 <span class="keyword">const</span> <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> *transformation() <span class="keyword">const</span>;
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<a name="l00067"></a>00067
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<a name="l00068"></a>00068 <span class="keywordtype">void</span> setPaintInterval(<span class="keywordtype">int</span> p1, <span class="keywordtype">int</span> p2);
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<a name="l00069"></a>00069 <span class="keywordtype">void</span> setPaintXInterval(<span class="keywordtype">double</span> p1, <span class="keywordtype">double</span> p2);
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<a name="l00070"></a>00070 <span class="keywordtype">void</span> setScaleInterval(<span class="keywordtype">double</span> s1, <span class="keywordtype">double</span> s2);
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<a name="l00071"></a>00071
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<a name="l00072"></a>00072 <span class="keywordtype">int</span> transform(<span class="keywordtype">double</span> x) <span class="keyword">const</span>;
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<a name="l00073"></a>00073 <span class="keywordtype">double</span> invTransform(<span class="keywordtype">double</span> i) <span class="keyword">const</span>;
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<a name="l00074"></a>00074
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<a name="l00075"></a>00075 <span class="keywordtype">double</span> xTransform(<span class="keywordtype">double</span> x) <span class="keyword">const</span>;
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<a name="l00076"></a>00076
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<a name="l00077"></a>00077 <span class="keyword">inline</span> <span class="keywordtype">double</span> p1() <span class="keyword">const</span>;
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<a name="l00078"></a>00078 <span class="keyword">inline</span> <span class="keywordtype">double</span> p2() <span class="keyword">const</span>;
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<a name="l00079"></a>00079
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<a name="l00080"></a>00080 <span class="keyword">inline</span> <span class="keywordtype">double</span> s1() <span class="keyword">const</span>;
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<a name="l00081"></a>00081 <span class="keyword">inline</span> <span class="keywordtype">double</span> s2() <span class="keyword">const</span>;
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<a name="l00082"></a>00082
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<a name="l00083"></a>00083 <span class="keyword">inline</span> <span class="keywordtype">double</span> pDist() <span class="keyword">const</span>;
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<a name="l00084"></a>00084 <span class="keyword">inline</span> <span class="keywordtype">double</span> sDist() <span class="keyword">const</span>;
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<a name="l00085"></a>00085
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<a name="l00086"></a><a class="code" href="class_qwt_scale_map.html#dacf5fdb36940d39929993083f6cb64b">00086</a> QT_STATIC_CONST <span class="keywordtype">double</span> LogMin;
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<a name="l00087"></a><a class="code" href="class_qwt_scale_map.html#0f06d4698bcb8af2200e37609b4b88c4">00087</a> QT_STATIC_CONST <span class="keywordtype">double</span> LogMax;
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<a name="l00088"></a>00088
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<a name="l00089"></a>00089 <span class="keyword">private</span>:
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<a name="l00090"></a>00090 <span class="keywordtype">void</span> newFactor();
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<a name="l00091"></a>00091
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<a name="l00092"></a>00092 <span class="keywordtype">double</span> d_s1, d_s2; <span class="comment">// scale interval boundaries</span>
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<a name="l00093"></a>00093 <span class="keywordtype">double</span> d_p1, d_p2; <span class="comment">// paint device interval boundaries</span>
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<a name="l00094"></a>00094
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<a name="l00095"></a>00095 <span class="keywordtype">double</span> d_cnv; <span class="comment">// conversion factor</span>
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<a name="l00096"></a>00096
102
<a name="l00097"></a>00097 <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> *d_transformation;
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<a name="l00098"></a>00098 };
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<a name="l00099"></a>00099
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<a name="l00103"></a><a class="code" href="class_qwt_scale_map.html#38b6a7040cd15a427f7631afa20cbad8">00103</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#38b6a7040cd15a427f7631afa20cbad8">QwtScaleMap::s1</a>()<span class="keyword"> const </span>
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<a name="l00104"></a>00104 <span class="keyword"></span>{
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<a name="l00105"></a>00105 <span class="keywordflow">return</span> d_s1;
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<a name="l00106"></a>00106 }
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<a name="l00107"></a>00107
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<a name="l00111"></a><a class="code" href="class_qwt_scale_map.html#644fe199eecf30fcd1803be554cd21f7">00111</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#644fe199eecf30fcd1803be554cd21f7">QwtScaleMap::s2</a>()<span class="keyword"> const </span>
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<a name="l00112"></a>00112 <span class="keyword"></span>{
112
<a name="l00113"></a>00113 <span class="keywordflow">return</span> d_s2;
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<a name="l00114"></a>00114 }
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<a name="l00115"></a>00115
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<a name="l00119"></a><a class="code" href="class_qwt_scale_map.html#c1ca2f9b4643d27fde693cc98bca0cd7">00119</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#c1ca2f9b4643d27fde693cc98bca0cd7">QwtScaleMap::p1</a>()<span class="keyword"> const </span>
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<a name="l00120"></a>00120 <span class="keyword"></span>{
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<a name="l00121"></a>00121 <span class="keywordflow">return</span> d_p1;
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<a name="l00122"></a>00122 }
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<a name="l00123"></a>00123
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<a name="l00127"></a><a class="code" href="class_qwt_scale_map.html#cf404215292b10bd46b1089d2452b8e9">00127</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#cf404215292b10bd46b1089d2452b8e9">QwtScaleMap::p2</a>()<span class="keyword"> const </span>
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<a name="l00128"></a>00128 <span class="keyword"></span>{
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<a name="l00129"></a>00129 <span class="keywordflow">return</span> d_p2;
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<a name="l00130"></a>00130 }
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<a name="l00131"></a>00131
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<a name="l00132"></a><a class="code" href="class_qwt_scale_map.html#f364d4fa10db6f5dbc93d6ce763e603f">00132</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#f364d4fa10db6f5dbc93d6ce763e603f">QwtScaleMap::pDist</a>()<span class="keyword"> const</span>
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<a name="l00133"></a>00133 <span class="keyword"></span>{
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<a name="l00134"></a>00134 <span class="keywordflow">return</span> qwtAbs(d_p2 - d_p1);
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<a name="l00135"></a>00135 }
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<a name="l00136"></a>00136
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<a name="l00137"></a><a class="code" href="class_qwt_scale_map.html#df621246cfa7313280a35a44063972f3">00137</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#df621246cfa7313280a35a44063972f3">QwtScaleMap::sDist</a>()<span class="keyword"> const</span>
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<a name="l00138"></a>00138 <span class="keyword"></span>{
132
<a name="l00139"></a>00139 <span class="keywordflow">return</span> qwtAbs(d_s2 - d_s1);
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<a name="l00140"></a>00140 }
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<a name="l00141"></a>00141
135
<a name="l00146"></a><a class="code" href="class_qwt_scale_map.html#053cad00dd463f45c7e1591c9f2d8296">00146</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#053cad00dd463f45c7e1591c9f2d8296">QwtScaleMap::xTransform</a>(<span class="keywordtype">double</span> s)<span class="keyword"> const</span>
136
<a name="l00147"></a>00147 <span class="keyword"></span>{
137
<a name="l00148"></a>00148 <span class="comment">// try to inline code from QwtScaleTransformation</span>
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<a name="l00149"></a>00149
139
<a name="l00150"></a>00150 <span class="keywordflow">if</span> ( d_transformation-><a class="code" href="class_qwt_scale_transformation.html#8b8936e303f55241599ccbf358ab9215">type</a>() == QwtScaleTransformation::Linear )
140
<a name="l00151"></a>00151 <span class="keywordflow">return</span> d_p1 + (s - d_s1) * d_cnv;
141
<a name="l00152"></a>00152
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<a name="l00153"></a>00153 <span class="keywordflow">if</span> ( d_transformation-><a class="code" href="class_qwt_scale_transformation.html#8b8936e303f55241599ccbf358ab9215">type</a>() == QwtScaleTransformation::Log10 )
143
<a name="l00154"></a>00154 <span class="keywordflow">return</span> d_p1 + log(s / d_s1) * d_cnv;
144
<a name="l00155"></a>00155
145
<a name="l00156"></a>00156 <span class="keywordflow">return</span> d_transformation-><a class="code" href="class_qwt_scale_transformation.html#54768a41cd5d7867e74c0d0032e45ec2">xForm</a>(s, d_s1, d_s2, d_p1, d_p2 );
146
<a name="l00157"></a>00157 }
147
<a name="l00158"></a>00158
148
<a name="l00163"></a><a class="code" href="class_qwt_scale_map.html#0df4d78da09fa88d1063554542c7fb03">00163</a> <span class="keyword">inline</span> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_map.html#0df4d78da09fa88d1063554542c7fb03">QwtScaleMap::invTransform</a>(<span class="keywordtype">double</span> p)<span class="keyword"> const</span>
149
<a name="l00164"></a>00164 <span class="keyword"></span>{
150
<a name="l00165"></a>00165 <span class="keywordflow">return</span> d_transformation-><a class="code" href="class_qwt_scale_transformation.html#7e2ba833b068f941d79d443bee769b42">invXForm</a>(p, d_p1, d_p2, d_s1, d_s2 );
151
<a name="l00166"></a>00166 }
152
<a name="l00167"></a>00167
153
<a name="l00175"></a><a class="code" href="class_qwt_scale_map.html#1ddda39f41e137560e625a8c66c1d2e1">00175</a> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_map.html#1ddda39f41e137560e625a8c66c1d2e1">QwtScaleMap::transform</a>(<span class="keywordtype">double</span> s)<span class="keyword"> const</span>
154
<a name="l00176"></a>00176 <span class="keyword"></span>{
155
<a name="l00177"></a>00177 <span class="keywordflow">return</span> qRound(<a class="code" href="class_qwt_scale_map.html#053cad00dd463f45c7e1591c9f2d8296">xTransform</a>(s));
156
<a name="l00178"></a>00178 }
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<a name="l00179"></a>00179
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<a name="l00180"></a>00180 <span class="preprocessor">#endif</span>
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</pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Jun 11 07:41:39 2007 for Qwt User's Guide by
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<a href="http://www.doxygen.org/index.html">
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<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.6 </small></address>
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