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<div id="projectname">Qwt User's Guide <span id="projectnumber">5.2.2</span></div>
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<h1>qwt_scale_engine.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_ENGINE_H</span>
<a name="l00011"></a>00011 <span class="preprocessor"></span><span class="preprocessor">#define QWT_SCALE_ENGINE_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_scale_div.h"</span>
<a name="l00015"></a>00015 <span class="preprocessor">#include "qwt_double_interval.h"</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="keyword">class </span><a class="code" href="class_qwt_scale_transformation.html" title="Operations for linear or logarithmic (base 10) transformations.">QwtScaleTransformation</a>;
<a name="l00018"></a>00018
<a name="l00022"></a><a class="code" href="class_qwt_scale_arithmetic.html">00022</a> <span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_scale_arithmetic.html" title="Arithmetic including a tolerance.">QwtScaleArithmetic</a>
<a name="l00023"></a>00023 {
<a name="l00024"></a>00024 <span class="keyword">public</span>:
<a name="l00025"></a>00025 <span class="keyword">static</span> <span class="keywordtype">int</span> compareEps(
<a name="l00026"></a>00026 <span class="keywordtype">double</span> value1, <span class="keywordtype">double</span> value2, <span class="keywordtype">double</span> intervalSize);
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="keyword">static</span> <span class="keywordtype">double</span> ceilEps(<span class="keywordtype">double</span> value, <span class="keywordtype">double</span> intervalSize);
<a name="l00029"></a>00029 <span class="keyword">static</span> <span class="keywordtype">double</span> floorEps(<span class="keywordtype">double</span> value, <span class="keywordtype">double</span> intervalSize);
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="keyword">static</span> <span class="keywordtype">double</span> divideEps(<span class="keywordtype">double</span> interval, <span class="keywordtype">double</span> steps);
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keyword">static</span> <span class="keywordtype">double</span> ceil125(<span class="keywordtype">double</span> x);
<a name="l00034"></a>00034 <span class="keyword">static</span> <span class="keywordtype">double</span> floor125(<span class="keywordtype">double</span> x);
<a name="l00035"></a>00035 };
<a name="l00036"></a>00036
<a name="l00050"></a><a class="code" href="class_qwt_scale_engine.html">00050</a> <span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_scale_engine.html" title="Base class for scale engines.">QwtScaleEngine</a>
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 <span class="keyword">public</span>:
<a name="l00069"></a><a class="code" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5f">00069</a> <span class="keyword">enum</span> <a class="code" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5f">Attribute</a>
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 NoAttribute = 0,
<a name="l00072"></a>00072 IncludeReference = 1,
<a name="l00073"></a>00073 Symmetric = 2,
<a name="l00074"></a>00074 Floating = 4,
<a name="l00075"></a>00075 Inverted = 8
<a name="l00076"></a>00076 };
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keyword">explicit</span> <a class="code" href="class_qwt_scale_engine.html" title="Base class for scale engines.">QwtScaleEngine</a>();
<a name="l00079"></a>00079 <span class="keyword">virtual</span> ~<a class="code" href="class_qwt_scale_engine.html" title="Base class for scale engines.">QwtScaleEngine</a>();
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="keywordtype">void</span> setAttribute(Attribute, <span class="keywordtype">bool</span> on = <span class="keyword">true</span>);
<a name="l00082"></a>00082 <span class="keywordtype">bool</span> testAttribute(Attribute) <span class="keyword">const</span>;
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="keywordtype">void</span> setAttributes(<span class="keywordtype">int</span>);
<a name="l00085"></a>00085 <span class="keywordtype">int</span> attributes() <span class="keyword">const</span>;
<a name="l00086"></a>00086
<a name="l00087"></a>00087 <span class="keywordtype">void</span> setReference(<span class="keywordtype">double</span> reference);
<a name="l00088"></a>00088 <span class="keywordtype">double</span> reference() <span class="keyword">const</span>;
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="keywordtype">void</span> setMargins(<span class="keywordtype">double</span> lower, <span class="keywordtype">double</span> upper);
<a name="l00091"></a>00091 <span class="keywordtype">double</span> lowerMargin() <span class="keyword">const</span>;
<a name="l00092"></a>00092 <span class="keywordtype">double</span> upperMargin() <span class="keyword">const</span>;
<a name="l00093"></a>00093
<a name="l00102"></a>00102 <span class="keyword">virtual</span> <span class="keywordtype">void</span> autoScale(<span class="keywordtype">int</span> maxNumSteps,
<a name="l00103"></a>00103 <span class="keywordtype">double</span> &x1, <span class="keywordtype">double</span> &x2, <span class="keywordtype">double</span> &stepSize) <span class="keyword">const</span> = 0;
<a name="l00104"></a>00104
<a name="l00115"></a>00115 <span class="keyword">virtual</span> <a class="code" href="class_qwt_scale_div.html" title="A class representing a scale division.">QwtScaleDiv</a> divideScale(<span class="keywordtype">double</span> x1, <span class="keywordtype">double</span> x2,
<a name="l00116"></a>00116 <span class="keywordtype">int</span> maxMajSteps, <span class="keywordtype">int</span> maxMinSteps,
<a name="l00117"></a>00117 <span class="keywordtype">double</span> stepSize = 0.0) <span class="keyword">const</span> = 0;
<a name="l00118"></a>00118
<a name="l00120"></a>00120 <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> *transformation() <span class="keyword">const</span> = 0;
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="keyword">protected</span>:
<a name="l00123"></a>00123 <span class="keywordtype">bool</span> contains(<span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> &, <span class="keywordtype">double</span> val) <span class="keyword">const</span>;
<a name="l00124"></a>00124 QwtValueList strip(<span class="keyword">const</span> QwtValueList&, <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> &) <span class="keyword">const</span>;
<a name="l00125"></a>00125 <span class="keywordtype">double</span> divideInterval(<span class="keywordtype">double</span> interval, <span class="keywordtype">int</span> numSteps) <span class="keyword">const</span>;
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> buildInterval(<span class="keywordtype">double</span> v) <span class="keyword">const</span>;
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="keyword">private</span>:
<a name="l00130"></a>00130 <span class="keyword">class </span>PrivateData;
<a name="l00131"></a>00131 PrivateData *d_data;
<a name="l00132"></a>00132 };
<a name="l00133"></a>00133
<a name="l00141"></a><a class="code" href="class_qwt_linear_scale_engine.html">00141</a> <span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_linear_scale_engine.html" title="A scale engine for linear scales.">QwtLinearScaleEngine</a>: <span class="keyword">public</span> <a class="code" href="class_qwt_scale_engine.html" title="Base class for scale engines.">QwtScaleEngine</a>
<a name="l00142"></a>00142 {
<a name="l00143"></a>00143 <span class="keyword">public</span>:
<a name="l00144"></a>00144 <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_engine.html#aa27323d6d9d5348bd253a61b45e4785b">autoScale</a>(<span class="keywordtype">int</span> maxSteps,
<a name="l00145"></a>00145 <span class="keywordtype">double</span> &x1, <span class="keywordtype">double</span> &x2, <span class="keywordtype">double</span> &stepSize) <span class="keyword">const</span>;
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="keyword">virtual</span> <a class="code" href="class_qwt_scale_div.html" title="A class representing a scale division.">QwtScaleDiv</a> <a class="code" href="class_qwt_scale_engine.html#a833fbdad4cce6e3b6448ee2549dc09e1" title="Calculate a scale division.">divideScale</a>(<span class="keywordtype">double</span> x1, <span class="keywordtype">double</span> x2,
<a name="l00148"></a>00148 <span class="keywordtype">int</span> numMajorSteps, <span class="keywordtype">int</span> numMinorSteps,
<a name="l00149"></a>00149 <span class="keywordtype">double</span> stepSize = 0.0) <span class="keyword">const</span>;
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <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 class="code" href="class_qwt_scale_engine.html#a04a93d0dc39a3483957764e7749989fd">transformation</a>() <span class="keyword">const</span>;
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="keyword">protected</span>:
<a name="l00154"></a>00154 <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> align(<span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a>&,
<a name="l00155"></a>00155 <span class="keywordtype">double</span> stepSize) <span class="keyword">const</span>;
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="keyword">private</span>:
<a name="l00158"></a>00158 <span class="keywordtype">void</span> buildTicks(
<a name="l00159"></a>00159 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> &, <span class="keywordtype">double</span> stepSize, <span class="keywordtype">int</span> maxMinSteps,
<a name="l00160"></a>00160 QwtValueList ticks[QwtScaleDiv::NTickTypes]) <span class="keyword">const</span>;
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="keywordtype">void</span> buildMinorTicks(
<a name="l00163"></a>00163 <span class="keyword">const</span> QwtValueList& majorTicks,
<a name="l00164"></a>00164 <span class="keywordtype">int</span> maxMinMark, <span class="keywordtype">double</span> step,
<a name="l00165"></a>00165 QwtValueList &, QwtValueList &) <span class="keyword">const</span>;
<a name="l00166"></a>00166
<a name="l00167"></a>00167 QwtValueList buildMajorTicks(
<a name="l00168"></a>00168 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> &interval, <span class="keywordtype">double</span> stepSize) <span class="keyword">const</span>;
<a name="l00169"></a>00169 };
<a name="l00170"></a>00170
<a name="l00182"></a><a class="code" href="class_qwt_log10_scale_engine.html">00182</a> <span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_log10_scale_engine.html" title="A scale engine for logarithmic (base 10) scales.">QwtLog10ScaleEngine</a>: <span class="keyword">public</span> <a class="code" href="class_qwt_scale_engine.html" title="Base class for scale engines.">QwtScaleEngine</a>
<a name="l00183"></a>00183 {
<a name="l00184"></a>00184 <span class="keyword">public</span>:
<a name="l00185"></a>00185 <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_engine.html#aa27323d6d9d5348bd253a61b45e4785b">autoScale</a>(<span class="keywordtype">int</span> maxSteps,
<a name="l00186"></a>00186 <span class="keywordtype">double</span> &x1, <span class="keywordtype">double</span> &x2, <span class="keywordtype">double</span> &stepSize) <span class="keyword">const</span>;
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <span class="keyword">virtual</span> <a class="code" href="class_qwt_scale_div.html" title="A class representing a scale division.">QwtScaleDiv</a> <a class="code" href="class_qwt_scale_engine.html#a833fbdad4cce6e3b6448ee2549dc09e1" title="Calculate a scale division.">divideScale</a>(<span class="keywordtype">double</span> x1, <span class="keywordtype">double</span> x2,
<a name="l00189"></a>00189 <span class="keywordtype">int</span> numMajorSteps, <span class="keywordtype">int</span> numMinorSteps,
<a name="l00190"></a>00190 <span class="keywordtype">double</span> stepSize = 0.0) <span class="keyword">const</span>;
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <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 class="code" href="class_qwt_scale_engine.html#a04a93d0dc39a3483957764e7749989fd">transformation</a>() <span class="keyword">const</span>;
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keyword">protected</span>:
<a name="l00195"></a>00195 <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> log10(<span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a>&) <span class="keyword">const</span>;
<a name="l00196"></a>00196 <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> pow10(<span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a>&) <span class="keyword">const</span>;
<a name="l00197"></a>00197
<a name="l00198"></a>00198 <span class="keyword">private</span>:
<a name="l00199"></a>00199 <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> align(<span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a>&,
<a name="l00200"></a>00200 <span class="keywordtype">double</span> stepSize) <span class="keyword">const</span>;
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <span class="keywordtype">void</span> buildTicks(
<a name="l00203"></a>00203 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> &, <span class="keywordtype">double</span> stepSize, <span class="keywordtype">int</span> maxMinSteps,
<a name="l00204"></a>00204 QwtValueList ticks[QwtScaleDiv::NTickTypes]) <span class="keyword">const</span>;
<a name="l00205"></a>00205
<a name="l00206"></a>00206 QwtValueList buildMinorTicks(
<a name="l00207"></a>00207 <span class="keyword">const</span> QwtValueList& majorTicks,
<a name="l00208"></a>00208 <span class="keywordtype">int</span> maxMinMark, <span class="keywordtype">double</span> step) <span class="keyword">const</span>;
<a name="l00209"></a>00209
<a name="l00210"></a>00210 QwtValueList buildMajorTicks(
<a name="l00211"></a>00211 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html" title="A class representing an interval.">QwtDoubleInterval</a> &interval, <span class="keywordtype">double</span> stepSize) <span class="keyword">const</span>;
<a name="l00212"></a>00212 };
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="preprocessor">#endif</span>
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