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<h1>qwt_scale_engine.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span>
21
<a name="l00002"></a>00002 <span class="comment"> * Qwt Widget Library</span>
22
<a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 1997 Josef Wilgen</span>
23
<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2002 Uwe Rathmann</span>
24
<a name="l00005"></a>00005 <span class="comment"> * </span>
25
<a name="l00006"></a>00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
26
<a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span>
27
<a name="l00008"></a>00008 <span class="comment"> *****************************************************************************/</span>
28
<a name="l00009"></a>00009
29
<a name="l00010"></a>00010 <span class="preprocessor">#include "qwt_math.h"</span>
30
<a name="l00011"></a>00011 <span class="preprocessor">#include "qwt_scale_map.h"</span>
31
<a name="l00012"></a>00012 <span class="preprocessor">#include "qwt_scale_engine.h"</span>
32
<a name="l00013"></a>00013
33
<a name="l00014"></a>00014 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> _eps = 1.0e-6;
34
<a name="l00015"></a>00015
35
<a name="l00028"></a><a class="code" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">00028</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">QwtScaleArithmetic::compareEps</a>(<span class="keywordtype">double</span> value1, <span class="keywordtype">double</span> value2,
36
<a name="l00029"></a>00029 <span class="keywordtype">double</span> intervalSize)
37
<a name="l00030"></a>00030 {
38
<a name="l00031"></a>00031 <span class="keyword">const</span> <span class="keywordtype">double</span> eps = qwtAbs(_eps * intervalSize);
39
<a name="l00032"></a>00032
40
<a name="l00033"></a>00033 <span class="keywordflow">if</span> ( value2 - value1 > eps )
41
<a name="l00034"></a>00034 <span class="keywordflow">return</span> -1;
42
<a name="l00035"></a>00035
43
<a name="l00036"></a>00036 <span class="keywordflow">if</span> ( value1 - value2 > eps )
44
<a name="l00037"></a>00037 <span class="keywordflow">return</span> 1;
45
<a name="l00038"></a>00038
46
<a name="l00039"></a>00039 <span class="keywordflow">return</span> 0;
47
<a name="l00040"></a>00040 }
48
<a name="l00041"></a>00041
49
<a name="l00050"></a><a class="code" href="class_qwt_scale_arithmetic.html#86da4fc0928457d03201d8b520d7d816">00050</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_arithmetic.html#86da4fc0928457d03201d8b520d7d816">QwtScaleArithmetic::ceilEps</a>(<span class="keywordtype">double</span> value,
50
<a name="l00051"></a>00051 <span class="keywordtype">double</span> intervalSize)
51
<a name="l00052"></a>00052 {
52
<a name="l00053"></a>00053 <span class="keyword">const</span> <span class="keywordtype">double</span> eps = _eps * intervalSize;
53
<a name="l00054"></a>00054
54
<a name="l00055"></a>00055 value = (value - eps) / intervalSize;
55
<a name="l00056"></a>00056 <span class="keywordflow">return</span> ceil(value) * intervalSize;
56
<a name="l00057"></a>00057 }
57
<a name="l00058"></a>00058
58
<a name="l00067"></a><a class="code" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">00067</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">QwtScaleArithmetic::floorEps</a>(<span class="keywordtype">double</span> value, <span class="keywordtype">double</span> intervalSize)
59
<a name="l00068"></a>00068 {
60
<a name="l00069"></a>00069 <span class="keyword">const</span> <span class="keywordtype">double</span> eps = _eps * intervalSize;
61
<a name="l00070"></a>00070
62
<a name="l00071"></a>00071 value = (value + eps) / intervalSize;
63
<a name="l00072"></a>00072 <span class="keywordflow">return</span> floor(value) * intervalSize;
64
<a name="l00073"></a>00073 }
65
<a name="l00074"></a>00074
66
<a name="l00075"></a>00075 <span class="comment">/*</span>
67
<a name="l00076"></a>00076 <span class="comment"> \brief Divide an interval into steps</span>
68
<a name="l00077"></a>00077 <span class="comment"></span>
69
<a name="l00078"></a>00078 <span class="comment"> \f$stepSize = (intervalSize - intervalSize * 10e^{-6}) / numSteps\f$</span>
70
<a name="l00079"></a>00079 <span class="comment"></span>
71
<a name="l00080"></a>00080 <span class="comment"> \param intervalSize Interval size</span>
72
<a name="l00081"></a>00081 <span class="comment"> \param numSteps Number of steps</span>
73
<a name="l00082"></a>00082 <span class="comment"> \return Step size</span>
74
<a name="l00083"></a>00083 <span class="comment">*/</span>
75
<a name="l00084"></a><a class="code" href="class_qwt_scale_arithmetic.html#e5f0415105b2a97cccb93f3da9ddaead">00084</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_arithmetic.html#e5f0415105b2a97cccb93f3da9ddaead">QwtScaleArithmetic::divideEps</a>(<span class="keywordtype">double</span> intervalSize, <span class="keywordtype">double</span> numSteps)
76
<a name="l00085"></a>00085 {
77
<a name="l00086"></a>00086 <span class="keywordflow">if</span> ( numSteps == 0.0 || intervalSize == 0.0 )
78
<a name="l00087"></a>00087 <span class="keywordflow">return</span> 0.0;
79
<a name="l00088"></a>00088
80
<a name="l00089"></a>00089 <span class="keywordflow">return</span> (intervalSize - (_eps * intervalSize)) / numSteps;
81
<a name="l00090"></a>00090 }
82
<a name="l00091"></a>00091
83
<a name="l00098"></a><a class="code" href="class_qwt_scale_arithmetic.html#5768ab1c30f4fa8f02e3bb83f50fac02">00098</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_arithmetic.html#5768ab1c30f4fa8f02e3bb83f50fac02">QwtScaleArithmetic::ceil125</a>(<span class="keywordtype">double</span> x)
84
<a name="l00099"></a>00099 {
85
<a name="l00100"></a>00100 <span class="keywordflow">if</span> (x == 0.0)
86
<a name="l00101"></a>00101 <span class="keywordflow">return</span> 0.0;
87
<a name="l00102"></a>00102
88
<a name="l00103"></a>00103 <span class="keyword">const</span> <span class="keywordtype">double</span> sign = (x > 0) ? 1.0 : -1.0;
89
<a name="l00104"></a>00104 <span class="keyword">const</span> <span class="keywordtype">double</span> lx = log10(fabs(x));
90
<a name="l00105"></a>00105 <span class="keyword">const</span> <span class="keywordtype">double</span> p10 = floor(lx);
91
<a name="l00106"></a>00106
92
<a name="l00107"></a>00107 <span class="keywordtype">double</span> fr = pow(10.0, lx - p10);
93
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (fr <=1.0)
94
<a name="l00109"></a>00109 fr = 1.0;
95
<a name="l00110"></a>00110 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (fr <= 2.0)
96
<a name="l00111"></a>00111 fr = 2.0;
97
<a name="l00112"></a>00112 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (fr <= 5.0)
98
<a name="l00113"></a>00113 fr = 5.0;
99
<a name="l00114"></a>00114 <span class="keywordflow">else</span>
100
<a name="l00115"></a>00115 fr = 10.0;
101
<a name="l00116"></a>00116
102
<a name="l00117"></a>00117 <span class="keywordflow">return</span> sign * fr * pow(10.0, p10);
103
<a name="l00118"></a>00118 }
104
<a name="l00119"></a>00119
105
<a name="l00126"></a><a class="code" href="class_qwt_scale_arithmetic.html#0cf6b5993a700cf0f00175486bd57b5b">00126</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_arithmetic.html#0cf6b5993a700cf0f00175486bd57b5b">QwtScaleArithmetic::floor125</a>(<span class="keywordtype">double</span> x)
106
<a name="l00127"></a>00127 {
107
<a name="l00128"></a>00128 <span class="keywordflow">if</span> (x == 0.0)
108
<a name="l00129"></a>00129 <span class="keywordflow">return</span> 0.0;
109
<a name="l00130"></a>00130
110
<a name="l00131"></a>00131 <span class="keywordtype">double</span> sign = (x > 0) ? 1.0 : -1.0;
111
<a name="l00132"></a>00132 <span class="keyword">const</span> <span class="keywordtype">double</span> lx = log10(fabs(x));
112
<a name="l00133"></a>00133 <span class="keyword">const</span> <span class="keywordtype">double</span> p10 = floor(lx);
113
<a name="l00134"></a>00134
114
<a name="l00135"></a>00135 <span class="keywordtype">double</span> fr = pow(10.0, lx - p10);
115
<a name="l00136"></a>00136 <span class="keywordflow">if</span> (fr >= 10.0)
116
<a name="l00137"></a>00137 fr = 10.0;
117
<a name="l00138"></a>00138 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (fr >= 5.0)
118
<a name="l00139"></a>00139 fr = 5.0;
119
<a name="l00140"></a>00140 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (fr >= 2.0)
120
<a name="l00141"></a>00141 fr = 2.0;
121
<a name="l00142"></a>00142 <span class="keywordflow">else</span>
122
<a name="l00143"></a>00143 fr = 1.0;
123
<a name="l00144"></a>00144
124
<a name="l00145"></a>00145 <span class="keywordflow">return</span> sign * fr * pow(10.0, p10);
125
<a name="l00146"></a>00146 }
126
<a name="l00147"></a>00147
127
<a name="l00148"></a>00148 <span class="keyword">class </span>QwtScaleEngine::PrivateData
128
<a name="l00149"></a>00149 {
129
<a name="l00150"></a>00150 <span class="keyword">public</span>:
130
<a name="l00151"></a>00151 PrivateData():
131
<a name="l00152"></a>00152 <a class="code" href="class_qwt_scale_engine.html#b4a6561bd3173d17b5407e93270f1628">attributes</a>(<a class="code" href="class_qwt_scale_engine.html">QwtScaleEngine</a>::NoAttribute),
132
<a name="l00153"></a>00153 <a class="code" href="class_qwt_scale_engine.html#bb67c0d07c05c41ad4ad67c3ccaffa1b">loMargin</a>(0.0),
133
<a name="l00154"></a>00154 <a class="code" href="class_qwt_scale_engine.html#7ad7e9a499cc399732b0720f545270e0">hiMargin</a>(0.0),
134
<a name="l00155"></a>00155 referenceValue(0.0)
135
<a name="l00156"></a>00156 {
136
<a name="l00157"></a>00157 }
137
<a name="l00158"></a>00158
138
<a name="l00159"></a>00159 <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_engine.html#b4a6561bd3173d17b5407e93270f1628">attributes</a>; <span class="comment">// scale attributes</span>
139
<a name="l00160"></a>00160
140
<a name="l00161"></a>00161 <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_engine.html#bb67c0d07c05c41ad4ad67c3ccaffa1b">loMargin</a>; <span class="comment">// margins</span>
141
<a name="l00162"></a>00162 <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_engine.html#7ad7e9a499cc399732b0720f545270e0">hiMargin</a>;
142
<a name="l00163"></a>00163
143
<a name="l00164"></a>00164 <span class="keywordtype">double</span> referenceValue; <span class="comment">// reference value</span>
144
<a name="l00165"></a>00165
145
<a name="l00166"></a>00166 };
146
<a name="l00167"></a>00167
147
<a name="l00169"></a><a class="code" href="class_qwt_scale_engine.html#58cb9344a913fa798ac7343d55f3f693">00169</a> <a class="code" href="class_qwt_scale_engine.html#58cb9344a913fa798ac7343d55f3f693">QwtScaleEngine::QwtScaleEngine</a>()
148
<a name="l00170"></a>00170 {
149
<a name="l00171"></a>00171 d_data = <span class="keyword">new</span> PrivateData;
150
<a name="l00172"></a>00172 }
151
<a name="l00173"></a>00173
152
<a name="l00174"></a>00174
153
<a name="l00176"></a><a class="code" href="class_qwt_scale_engine.html#b9c21b4550d44d9a82c1865864cb8943">00176</a> <a class="code" href="class_qwt_scale_engine.html#b9c21b4550d44d9a82c1865864cb8943">QwtScaleEngine::~QwtScaleEngine</a> ()
154
<a name="l00177"></a>00177 {
155
<a name="l00178"></a>00178 <span class="keyword">delete</span> d_data;
156
<a name="l00179"></a>00179 }
157
<a name="l00180"></a>00180
158
<a name="l00187"></a><a class="code" href="class_qwt_scale_engine.html#bb67c0d07c05c41ad4ad67c3ccaffa1b">00187</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_engine.html#bb67c0d07c05c41ad4ad67c3ccaffa1b">QwtScaleEngine::loMargin</a>()<span class="keyword"> const </span>
159
<a name="l00188"></a>00188 <span class="keyword"></span>{
160
<a name="l00189"></a>00189 <span class="keywordflow">return</span> d_data->loMargin;
161
<a name="l00190"></a>00190 }
162
<a name="l00191"></a>00191
163
<a name="l00198"></a><a class="code" href="class_qwt_scale_engine.html#7ad7e9a499cc399732b0720f545270e0">00198</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_engine.html#7ad7e9a499cc399732b0720f545270e0">QwtScaleEngine::hiMargin</a>()<span class="keyword"> const </span>
164
<a name="l00199"></a>00199 <span class="keyword"></span>{
165
<a name="l00200"></a>00200 <span class="keywordflow">return</span> d_data->hiMargin;
166
<a name="l00201"></a>00201 }
167
<a name="l00202"></a>00202
168
<a name="l00219"></a><a class="code" href="class_qwt_scale_engine.html#d6e83875e5e7a65b005ebb6213e1e869">00219</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_engine.html#d6e83875e5e7a65b005ebb6213e1e869">QwtScaleEngine::setMargins</a>(<span class="keywordtype">double</span> mlo, <span class="keywordtype">double</span> mhi)
169
<a name="l00220"></a>00220 {
170
<a name="l00221"></a>00221 d_data->loMargin = qwtMax(mlo,0.0);
171
<a name="l00222"></a>00222 d_data->hiMargin = qwtMax(mhi,0.0);
172
<a name="l00223"></a>00223 }
173
<a name="l00224"></a>00224
174
<a name="l00233"></a><a class="code" href="class_qwt_scale_engine.html#ff30158c5ccfee78f4c3e01c0fb5f4de">00233</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_engine.html#ff30158c5ccfee78f4c3e01c0fb5f4de">QwtScaleEngine::divideInterval</a>(
175
<a name="l00234"></a>00234 <span class="keywordtype">double</span> intervalSize, <span class="keywordtype">int</span> numSteps)<span class="keyword"> const</span>
176
<a name="l00235"></a>00235 <span class="keyword"></span>{
177
<a name="l00236"></a>00236 <span class="keywordflow">if</span> ( numSteps <= 0 )
178
<a name="l00237"></a>00237 <span class="keywordflow">return</span> 0.0;
179
<a name="l00238"></a>00238
180
<a name="l00239"></a>00239 <span class="keywordtype">double</span> v = <a class="code" href="class_qwt_scale_arithmetic.html#e5f0415105b2a97cccb93f3da9ddaead">QwtScaleArithmetic::divideEps</a>(intervalSize, numSteps);
181
<a name="l00240"></a>00240 <span class="keywordflow">return</span> <a class="code" href="class_qwt_scale_arithmetic.html#5768ab1c30f4fa8f02e3bb83f50fac02">QwtScaleArithmetic::ceil125</a>(v);
182
<a name="l00241"></a>00241 }
183
<a name="l00242"></a>00242
184
<a name="l00251"></a><a class="code" href="class_qwt_scale_engine.html#3fb6cda1c6b66bf5508913655e90d0e0">00251</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_scale_engine.html#3fb6cda1c6b66bf5508913655e90d0e0">QwtScaleEngine::contains</a>(
185
<a name="l00252"></a>00252 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval, <span class="keywordtype">double</span> value)<span class="keyword"> const</span>
186
<a name="l00253"></a>00253 <span class="keyword"></span>{
187
<a name="l00254"></a>00254 <span class="keywordflow">if</span> (!interval.<a class="code" href="class_qwt_double_interval.html#7ffabfbf4e9693eed40f86aeb89ebf87">isValid</a>() )
188
<a name="l00255"></a>00255 <span class="keywordflow">return</span> <span class="keyword">false</span>;
189
<a name="l00256"></a>00256
190
<a name="l00257"></a>00257 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">QwtScaleArithmetic::compareEps</a>(value,
191
<a name="l00258"></a>00258 interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>(), interval.<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>()) < 0 )
192
<a name="l00259"></a>00259 {
193
<a name="l00260"></a>00260 <span class="keywordflow">return</span> <span class="keyword">false</span>;
194
<a name="l00261"></a>00261 }
195
<a name="l00262"></a>00262
196
<a name="l00263"></a>00263 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">QwtScaleArithmetic::compareEps</a>(value,
197
<a name="l00264"></a>00264 interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>(), interval.<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>()) > 0 )
198
<a name="l00265"></a>00265 {
199
<a name="l00266"></a>00266 <span class="keywordflow">return</span> <span class="keyword">false</span>;
200
<a name="l00267"></a>00267 }
201
<a name="l00268"></a>00268
202
<a name="l00269"></a>00269 <span class="keywordflow">return</span> <span class="keyword">true</span>;
203
<a name="l00270"></a>00270 }
204
<a name="l00271"></a>00271
205
<a name="l00280"></a><a class="code" href="class_qwt_scale_engine.html#82210ea6ad135a55142578879cb6a8f6">00280</a> QwtValueList <a class="code" href="class_qwt_scale_engine.html#82210ea6ad135a55142578879cb6a8f6">QwtScaleEngine::strip</a>(
206
<a name="l00281"></a>00281 <span class="keyword">const</span> QwtValueList& ticks,
207
<a name="l00282"></a>00282 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval)<span class="keyword"> const</span>
208
<a name="l00283"></a>00283 <span class="keyword"></span>{
209
<a name="l00284"></a>00284 <span class="keywordflow">if</span> ( !interval.<a class="code" href="class_qwt_double_interval.html#7ffabfbf4e9693eed40f86aeb89ebf87">isValid</a>() || ticks.count() == 0 )
210
<a name="l00285"></a>00285 <span class="keywordflow">return</span> QwtValueList();
211
<a name="l00286"></a>00286
212
<a name="l00287"></a>00287 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_engine.html#3fb6cda1c6b66bf5508913655e90d0e0">contains</a>(interval, ticks.first())
213
<a name="l00288"></a>00288 && <a class="code" href="class_qwt_scale_engine.html#3fb6cda1c6b66bf5508913655e90d0e0">contains</a>(interval, ticks.last()) )
214
<a name="l00289"></a>00289 {
215
<a name="l00290"></a>00290 <span class="keywordflow">return</span> ticks;
216
<a name="l00291"></a>00291 }
217
<a name="l00292"></a>00292
218
<a name="l00293"></a>00293 QwtValueList strippedTicks;
219
<a name="l00294"></a>00294 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i < (int)ticks.count(); i++ )
220
<a name="l00295"></a>00295 {
221
<a name="l00296"></a>00296 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_engine.html#3fb6cda1c6b66bf5508913655e90d0e0">contains</a>(interval, ticks[i]) )
222
<a name="l00297"></a>00297 strippedTicks += ticks[i];
223
<a name="l00298"></a>00298 }
224
<a name="l00299"></a>00299 <span class="keywordflow">return</span> strippedTicks;
225
<a name="l00300"></a>00300 }
226
<a name="l00301"></a>00301
227
<a name="l00309"></a><a class="code" href="class_qwt_scale_engine.html#614c8bc7c24000b0461ed1e63a0d1db8">00309</a> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> <a class="code" href="class_qwt_scale_engine.html#614c8bc7c24000b0461ed1e63a0d1db8">QwtScaleEngine::buildInterval</a>(<span class="keywordtype">double</span> v)<span class="keyword"> const</span>
228
<a name="l00310"></a>00310 <span class="keyword"></span>{
229
<a name="l00311"></a>00311 <span class="keyword">const</span> <span class="keywordtype">double</span> delta = (v == 0.0) ? 0.5 : qwtAbs(0.5 * v);
230
<a name="l00312"></a>00312 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a>(v - delta, v + delta);
231
<a name="l00313"></a>00313 }
232
<a name="l00314"></a>00314
233
<a name="l00339"></a><a class="code" href="class_qwt_scale_engine.html#cf02a88f6e778edbc9e005960f35b3b7">00339</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_engine.html#cf02a88f6e778edbc9e005960f35b3b7">QwtScaleEngine::setAttribute</a>(<a class="code" href="class_qwt_scale_engine.html#7548418e0896d75eec164bfa2ba3ff5f">Attribute</a> attribute, <span class="keywordtype">bool</span> on)
234
<a name="l00340"></a>00340 {
235
<a name="l00341"></a>00341 <span class="keywordflow">if</span> (on)
236
<a name="l00342"></a>00342 d_data->attributes |= attribute;
237
<a name="l00343"></a>00343 <span class="keywordflow">else</span>
238
<a name="l00344"></a>00344 d_data->attributes &= (~attribute);
239
<a name="l00345"></a>00345 }
240
<a name="l00346"></a>00346
241
<a name="l00353"></a><a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">00353</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">QwtScaleEngine::testAttribute</a>(<a class="code" href="class_qwt_scale_engine.html#7548418e0896d75eec164bfa2ba3ff5f">Attribute</a> attribute)<span class="keyword"> const</span>
242
<a name="l00354"></a>00354 <span class="keyword"></span>{
243
<a name="l00355"></a>00355 <span class="keywordflow">return</span> bool(d_data->attributes & attribute);
244
<a name="l00356"></a>00356 }
245
<a name="l00357"></a>00357
246
<a name="l00364"></a><a class="code" href="class_qwt_scale_engine.html#d221d715e28e644975c6cbda9cae492e">00364</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_engine.html#d221d715e28e644975c6cbda9cae492e">QwtScaleEngine::setAttributes</a>(<span class="keywordtype">int</span> attributes)
247
<a name="l00365"></a>00365 {
248
<a name="l00366"></a>00366 d_data->attributes = attributes;
249
<a name="l00367"></a>00367 }
250
<a name="l00368"></a>00368
251
<a name="l00372"></a><a class="code" href="class_qwt_scale_engine.html#b4a6561bd3173d17b5407e93270f1628">00372</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_engine.html#b4a6561bd3173d17b5407e93270f1628">QwtScaleEngine::attributes</a>()<span class="keyword"> const</span>
252
<a name="l00373"></a>00373 <span class="keyword"></span>{
253
<a name="l00374"></a>00374 <span class="keywordflow">return</span> d_data->attributes;
254
<a name="l00375"></a>00375 }
255
<a name="l00376"></a>00376
256
<a name="l00384"></a><a class="code" href="class_qwt_scale_engine.html#89985ea69dbd858c8b9162ecd2be936e">00384</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_engine.html#89985ea69dbd858c8b9162ecd2be936e">QwtScaleEngine::setReference</a>(<span class="keywordtype">double</span> r)
257
<a name="l00385"></a>00385 {
258
<a name="l00386"></a>00386 d_data->referenceValue = r;
259
<a name="l00387"></a>00387 }
260
<a name="l00388"></a>00388
261
<a name="l00393"></a><a class="code" href="class_qwt_scale_engine.html#041c9485898ea504d9a57ad200438d72">00393</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_engine.html#041c9485898ea504d9a57ad200438d72">QwtScaleEngine::reference</a>()<span class="keyword"> const </span>
262
<a name="l00394"></a>00394 <span class="keyword"></span>{
263
<a name="l00395"></a>00395 <span class="keywordflow">return</span> d_data->referenceValue;
264
<a name="l00396"></a>00396 }
265
<a name="l00397"></a>00397
266
<a name="l00401"></a><a class="code" href="class_qwt_linear_scale_engine.html#def184ed0c1febe7611d4f91bb09f5d7">00401</a> <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> *<a class="code" href="class_qwt_linear_scale_engine.html#def184ed0c1febe7611d4f91bb09f5d7">QwtLinearScaleEngine::transformation</a>()<span class="keyword"> const</span>
267
<a name="l00402"></a>00402 <span class="keyword"></span>{
268
<a name="l00403"></a>00403 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a>(QwtScaleTransformation::Linear);
269
<a name="l00404"></a>00404 }
270
<a name="l00405"></a>00405
271
<a name="l00416"></a><a class="code" href="class_qwt_linear_scale_engine.html#2b59d0b1b40d476f01b5b693ceac30ed">00416</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_linear_scale_engine.html#2b59d0b1b40d476f01b5b693ceac30ed">QwtLinearScaleEngine::autoScale</a>(<span class="keywordtype">int</span> maxNumSteps,
272
<a name="l00417"></a>00417 <span class="keywordtype">double</span> &x1, <span class="keywordtype">double</span> &x2, <span class="keywordtype">double</span> &stepSize)<span class="keyword"> const</span>
273
<a name="l00418"></a>00418 <span class="keyword"></span>{
274
<a name="l00419"></a>00419 <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> interval(x1, x2);
275
<a name="l00420"></a>00420 interval = interval.<a class="code" href="class_qwt_double_interval.html#51a270cbfdd25f47ba8f26a16e27bf26">normalized</a>();
276
<a name="l00421"></a>00421
277
<a name="l00422"></a>00422 interval.<a class="code" href="class_qwt_double_interval.html#610a87e9921738cf3a4ef1f4cbd96f02">setMinValue</a>(interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>() - <a class="code" href="class_qwt_scale_engine.html#bb67c0d07c05c41ad4ad67c3ccaffa1b">loMargin</a>());
278
<a name="l00423"></a>00423 interval.<a class="code" href="class_qwt_double_interval.html#34863ae20465138c887f6de55a5f1bed">setMaxValue</a>(interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>() + <a class="code" href="class_qwt_scale_engine.html#7ad7e9a499cc399732b0720f545270e0">hiMargin</a>());
279
<a name="l00424"></a>00424
280
<a name="l00425"></a>00425 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">testAttribute</a>(QwtScaleEngine::Symmetric))
281
<a name="l00426"></a>00426 interval = interval.<a class="code" href="class_qwt_double_interval.html#762d619c1af104da8b73c6009b7cd669">symmetrize</a>(<a class="code" href="class_qwt_scale_engine.html#041c9485898ea504d9a57ad200438d72">reference</a>());
282
<a name="l00427"></a>00427
283
<a name="l00428"></a>00428 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">testAttribute</a>(QwtScaleEngine::IncludeReference))
284
<a name="l00429"></a>00429 interval = interval.<a class="code" href="class_qwt_double_interval.html#718e883366caa45e24b2ba4b9d529f11">extend</a>(<a class="code" href="class_qwt_scale_engine.html#041c9485898ea504d9a57ad200438d72">reference</a>());
285
<a name="l00430"></a>00430
286
<a name="l00431"></a>00431 <span class="keywordflow">if</span> (interval.<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>() == 0.0)
287
<a name="l00432"></a>00432 interval = <a class="code" href="class_qwt_scale_engine.html#614c8bc7c24000b0461ed1e63a0d1db8">buildInterval</a>(interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>());
288
<a name="l00433"></a>00433
289
<a name="l00434"></a>00434 stepSize = <a class="code" href="class_qwt_scale_engine.html#ff30158c5ccfee78f4c3e01c0fb5f4de">divideInterval</a>(interval.<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>(), qwtMax(maxNumSteps, 1));
290
<a name="l00435"></a>00435
291
<a name="l00436"></a>00436 <span class="keywordflow">if</span> ( !<a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">testAttribute</a>(QwtScaleEngine::Floating) )
292
<a name="l00437"></a>00437 interval = <a class="code" href="class_qwt_linear_scale_engine.html#426436e31a379ed26c7d0d976e3ca0a2">align</a>(interval, stepSize);
293
<a name="l00438"></a>00438
294
<a name="l00439"></a>00439 x1 = interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>();
295
<a name="l00440"></a>00440 x2 = interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>();
296
<a name="l00441"></a>00441
297
<a name="l00442"></a>00442 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">testAttribute</a>(QwtScaleEngine::Inverted))
298
<a name="l00443"></a>00443 {
299
<a name="l00444"></a>00444 qSwap(x1, x2);
300
<a name="l00445"></a>00445 stepSize = -stepSize;
301
<a name="l00446"></a>00446 }
302
<a name="l00447"></a>00447 }
303
<a name="l00448"></a>00448
304
<a name="l00461"></a><a class="code" href="class_qwt_linear_scale_engine.html#9f74287e61d1abfc2096cc88222c132a">00461</a> <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a> <a class="code" href="class_qwt_linear_scale_engine.html#9f74287e61d1abfc2096cc88222c132a">QwtLinearScaleEngine::divideScale</a>(<span class="keywordtype">double</span> x1, <span class="keywordtype">double</span> x2,
305
<a name="l00462"></a>00462 <span class="keywordtype">int</span> maxMajSteps, <span class="keywordtype">int</span> maxMinSteps, <span class="keywordtype">double</span> stepSize)<span class="keyword"> const</span>
306
<a name="l00463"></a>00463 <span class="keyword"></span>{
307
<a name="l00464"></a>00464 <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> interval = <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a>(x1, x2).normalized();
308
<a name="l00465"></a>00465 <span class="keywordflow">if</span> (interval.<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>() <= 0 )
309
<a name="l00466"></a>00466 <span class="keywordflow">return</span> <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a>();
310
<a name="l00467"></a>00467
311
<a name="l00468"></a>00468 stepSize = qwtAbs(stepSize);
312
<a name="l00469"></a>00469 <span class="keywordflow">if</span> ( stepSize == 0.0 )
313
<a name="l00470"></a>00470 {
314
<a name="l00471"></a>00471 <span class="keywordflow">if</span> ( maxMajSteps < 1 )
315
<a name="l00472"></a>00472 maxMajSteps = 1;
316
<a name="l00473"></a>00473
317
<a name="l00474"></a>00474 stepSize = <a class="code" href="class_qwt_scale_engine.html#ff30158c5ccfee78f4c3e01c0fb5f4de">divideInterval</a>(interval.<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>(), maxMajSteps);
318
<a name="l00475"></a>00475 }
319
<a name="l00476"></a>00476
320
<a name="l00477"></a>00477 <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a> scaleDiv;
321
<a name="l00478"></a>00478
322
<a name="l00479"></a>00479 <span class="keywordflow">if</span> ( stepSize != 0.0 )
323
<a name="l00480"></a>00480 {
324
<a name="l00481"></a>00481 QwtValueList ticks[QwtScaleDiv::NTickTypes];
325
<a name="l00482"></a>00482 buildTicks(interval, stepSize, maxMinSteps, ticks);
326
<a name="l00483"></a>00483
327
<a name="l00484"></a>00484 scaleDiv = <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a>(interval, ticks);
328
<a name="l00485"></a>00485 }
329
<a name="l00486"></a>00486
330
<a name="l00487"></a>00487 <span class="keywordflow">if</span> ( x1 > x2 )
331
<a name="l00488"></a>00488 scaleDiv.invert();
332
<a name="l00489"></a>00489
333
<a name="l00490"></a>00490 <span class="keywordflow">return</span> scaleDiv;
334
<a name="l00491"></a>00491 }
335
<a name="l00492"></a>00492
336
<a name="l00493"></a>00493 <span class="keywordtype">void</span> QwtLinearScaleEngine::buildTicks(
337
<a name="l00494"></a>00494 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a>& interval, <span class="keywordtype">double</span> stepSize, <span class="keywordtype">int</span> maxMinSteps,
338
<a name="l00495"></a>00495 QwtValueList ticks[QwtScaleDiv::NTickTypes])<span class="keyword"> const</span>
339
<a name="l00496"></a>00496 <span class="keyword"></span>{
340
<a name="l00497"></a>00497 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> boundingInterval =
341
<a name="l00498"></a>00498 <a class="code" href="class_qwt_linear_scale_engine.html#426436e31a379ed26c7d0d976e3ca0a2">align</a>(interval, stepSize);
342
<a name="l00499"></a>00499
343
<a name="l00500"></a>00500 ticks[QwtScaleDiv::MajorTick] =
344
<a name="l00501"></a>00501 buildMajorTicks(boundingInterval, stepSize);
345
<a name="l00502"></a>00502
346
<a name="l00503"></a>00503 <span class="keywordflow">if</span> ( maxMinSteps > 0 )
347
<a name="l00504"></a>00504 {
348
<a name="l00505"></a>00505 buildMinorTicks(ticks[QwtScaleDiv::MajorTick], maxMinSteps, stepSize,
349
<a name="l00506"></a>00506 ticks[QwtScaleDiv::MinorTick], ticks[QwtScaleDiv::MediumTick]);
350
<a name="l00507"></a>00507 }
351
<a name="l00508"></a>00508
352
<a name="l00509"></a>00509 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i < QwtScaleDiv::NTickTypes; i++ )
353
<a name="l00510"></a>00510 {
354
<a name="l00511"></a>00511 ticks[i] = <a class="code" href="class_qwt_scale_engine.html#82210ea6ad135a55142578879cb6a8f6">strip</a>(ticks[i], interval);
355
<a name="l00512"></a>00512
356
<a name="l00513"></a>00513 <span class="comment">// ticks very close to 0.0 are </span>
357
<a name="l00514"></a>00514 <span class="comment">// explicitely set to 0.0</span>
358
<a name="l00515"></a>00515
359
<a name="l00516"></a>00516 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> j = 0; j < (int)ticks[i].count(); j++ )
360
<a name="l00517"></a>00517 {
361
<a name="l00518"></a>00518 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">QwtScaleArithmetic::compareEps</a>(ticks[i][j], 0.0, stepSize) == 0 )
362
<a name="l00519"></a>00519 ticks[i][j] = 0.0;
363
<a name="l00520"></a>00520 }
364
<a name="l00521"></a>00521 }
365
<a name="l00522"></a>00522 }
366
<a name="l00523"></a>00523
367
<a name="l00524"></a>00524 QwtValueList QwtLinearScaleEngine::buildMajorTicks(
368
<a name="l00525"></a>00525 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval, <span class="keywordtype">double</span> stepSize)<span class="keyword"> const</span>
369
<a name="l00526"></a>00526 <span class="keyword"></span>{
370
<a name="l00527"></a>00527 <span class="keywordtype">int</span> numTicks = qRound(interval.<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>() / stepSize) + 1;
371
<a name="l00528"></a>00528 <span class="preprocessor">#if 1</span>
372
<a name="l00529"></a>00529 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( numTicks > 10000 )
373
<a name="l00530"></a>00530 numTicks = 10000;
374
<a name="l00531"></a>00531 <span class="preprocessor">#endif</span>
375
<a name="l00532"></a>00532 <span class="preprocessor"></span>
376
<a name="l00533"></a>00533 QwtValueList ticks;
377
<a name="l00534"></a>00534
378
<a name="l00535"></a>00535 ticks += interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>();
379
<a name="l00536"></a>00536 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < numTicks - 1; i++)
380
<a name="l00537"></a>00537 ticks += interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>() + i * stepSize;
381
<a name="l00538"></a>00538 ticks += interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>();
382
<a name="l00539"></a>00539
383
<a name="l00540"></a>00540 <span class="keywordflow">return</span> ticks;
384
<a name="l00541"></a>00541 }
385
<a name="l00542"></a>00542
386
<a name="l00543"></a>00543 <span class="keywordtype">void</span> QwtLinearScaleEngine::buildMinorTicks(
387
<a name="l00544"></a>00544 <span class="keyword">const</span> QwtValueList& majorTicks,
388
<a name="l00545"></a>00545 <span class="keywordtype">int</span> maxMinSteps, <span class="keywordtype">double</span> stepSize,
389
<a name="l00546"></a>00546 QwtValueList &minorTicks,
390
<a name="l00547"></a>00547 QwtValueList &mediumTicks)<span class="keyword"> const</span>
391
<a name="l00548"></a>00548 <span class="keyword"></span>{
392
<a name="l00549"></a>00549 <span class="keywordtype">double</span> minStep = <a class="code" href="class_qwt_scale_engine.html#ff30158c5ccfee78f4c3e01c0fb5f4de">divideInterval</a>(stepSize, maxMinSteps);
393
<a name="l00550"></a>00550 <span class="keywordflow">if</span> (minStep == 0.0)
394
<a name="l00551"></a>00551 <span class="keywordflow">return</span>;
395
<a name="l00552"></a>00552
396
<a name="l00553"></a>00553 <span class="comment">// # minor steps per interval</span>
397
<a name="l00554"></a>00554 <span class="keywordtype">int</span> nMin = qwtAbs(qRound(stepSize / minStep)) - 1;
398
<a name="l00555"></a>00555
399
<a name="l00556"></a>00556 <span class="comment">// Do the minor steps fit into the interval?</span>
400
<a name="l00557"></a>00557 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">QwtScaleArithmetic::compareEps</a>((nMin + 1) * qwtAbs(minStep),
401
<a name="l00558"></a>00558 qwtAbs(stepSize), stepSize) > 0)
402
<a name="l00559"></a>00559 {
403
<a name="l00560"></a>00560 nMin = 1;
404
<a name="l00561"></a>00561 minStep = stepSize * 0.5;
405
<a name="l00562"></a>00562 }
406
<a name="l00563"></a>00563
407
<a name="l00564"></a>00564 <span class="keywordtype">int</span> medIndex = -1;
408
<a name="l00565"></a>00565 <span class="keywordflow">if</span> ( nMin % 2 )
409
<a name="l00566"></a>00566 medIndex = nMin / 2;
410
<a name="l00567"></a>00567
411
<a name="l00568"></a>00568 <span class="comment">// calculate minor ticks</span>
412
<a name="l00569"></a>00569
413
<a name="l00570"></a>00570 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < (int)majorTicks.count(); i++)
414
<a name="l00571"></a>00571 {
415
<a name="l00572"></a>00572 <span class="keywordtype">double</span> val = majorTicks[i];
416
<a name="l00573"></a>00573 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> k=0; k< nMin; k++)
417
<a name="l00574"></a>00574 {
418
<a name="l00575"></a>00575 val += minStep;
419
<a name="l00576"></a>00576
420
<a name="l00577"></a>00577 <span class="keywordtype">double</span> alignedValue = val;
421
<a name="l00578"></a>00578 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">QwtScaleArithmetic::compareEps</a>(val, 0.0, stepSize) == 0)
422
<a name="l00579"></a>00579 alignedValue = 0.0;
423
<a name="l00580"></a>00580
424
<a name="l00581"></a>00581 <span class="keywordflow">if</span> ( k == medIndex )
425
<a name="l00582"></a>00582 mediumTicks += alignedValue;
426
<a name="l00583"></a>00583 <span class="keywordflow">else</span>
427
<a name="l00584"></a>00584 minorTicks += alignedValue;
428
<a name="l00585"></a>00585 }
429
<a name="l00586"></a>00586 }
430
<a name="l00587"></a>00587 }
431
<a name="l00588"></a>00588
432
<a name="l00600"></a><a class="code" href="class_qwt_linear_scale_engine.html#426436e31a379ed26c7d0d976e3ca0a2">00600</a> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> <a class="code" href="class_qwt_linear_scale_engine.html#426436e31a379ed26c7d0d976e3ca0a2">QwtLinearScaleEngine::align</a>(
433
<a name="l00601"></a>00601 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval, <span class="keywordtype">double</span> stepSize)<span class="keyword"> const</span>
434
<a name="l00602"></a>00602 <span class="keyword"></span>{
435
<a name="l00603"></a>00603 <span class="keyword">const</span> <span class="keywordtype">double</span> x1 =
436
<a name="l00604"></a>00604 <a class="code" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">QwtScaleArithmetic::floorEps</a>(interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>(), stepSize);
437
<a name="l00605"></a>00605 <span class="keyword">const</span> <span class="keywordtype">double</span> x2 =
438
<a name="l00606"></a>00606 <a class="code" href="class_qwt_scale_arithmetic.html#86da4fc0928457d03201d8b520d7d816">QwtScaleArithmetic::ceilEps</a>(interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>(), stepSize);
439
<a name="l00607"></a>00607
440
<a name="l00608"></a>00608 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a>(x1, x2);
441
<a name="l00609"></a>00609 }
442
<a name="l00610"></a>00610
443
<a name="l00614"></a><a class="code" href="class_qwt_log10_scale_engine.html#1dd1c14da59c9103a21358971a373e2b">00614</a> <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> *<a class="code" href="class_qwt_log10_scale_engine.html#1dd1c14da59c9103a21358971a373e2b">QwtLog10ScaleEngine::transformation</a>()<span class="keyword"> const</span>
444
<a name="l00615"></a>00615 <span class="keyword"></span>{
445
<a name="l00616"></a>00616 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a>(QwtScaleTransformation::Log10);
446
<a name="l00617"></a>00617 }
447
<a name="l00618"></a>00618
448
<a name="l00629"></a><a class="code" href="class_qwt_log10_scale_engine.html#f725424b579831a058b1d81490a4cec6">00629</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_log10_scale_engine.html#f725424b579831a058b1d81490a4cec6">QwtLog10ScaleEngine::autoScale</a>(<span class="keywordtype">int</span> maxNumSteps,
449
<a name="l00630"></a>00630 <span class="keywordtype">double</span> &x1, <span class="keywordtype">double</span> &x2, <span class="keywordtype">double</span> &stepSize)<span class="keyword"> const</span>
450
<a name="l00631"></a>00631 <span class="keyword"></span>{
451
<a name="l00632"></a>00632 <span class="keywordflow">if</span> ( x1 > x2 )
452
<a name="l00633"></a>00633 qSwap(x1, x2);
453
<a name="l00634"></a>00634
454
<a name="l00635"></a>00635 <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> interval(x1 / pow(10.0, <a class="code" href="class_qwt_scale_engine.html#bb67c0d07c05c41ad4ad67c3ccaffa1b">loMargin</a>()),
455
<a name="l00636"></a>00636 x2 * pow(10.0, <a class="code" href="class_qwt_scale_engine.html#7ad7e9a499cc399732b0720f545270e0">hiMargin</a>()) );
456
<a name="l00637"></a>00637
457
<a name="l00638"></a>00638 <span class="keywordtype">double</span> logRef = 1.0;
458
<a name="l00639"></a>00639 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_scale_engine.html#041c9485898ea504d9a57ad200438d72">reference</a>() > LOG_MIN / 2)
459
<a name="l00640"></a>00640 logRef = qwtMin(<a class="code" href="class_qwt_scale_engine.html#041c9485898ea504d9a57ad200438d72">reference</a>(), LOG_MAX / 2);
460
<a name="l00641"></a>00641
461
<a name="l00642"></a>00642 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">testAttribute</a>(QwtScaleEngine::Symmetric))
462
<a name="l00643"></a>00643 {
463
<a name="l00644"></a>00644 <span class="keyword">const</span> <span class="keywordtype">double</span> delta = qwtMax(interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>() / logRef,
464
<a name="l00645"></a>00645 logRef / interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>());
465
<a name="l00646"></a>00646 interval.<a class="code" href="class_qwt_double_interval.html#a824f64ce1f33a025d60e1810c956f09">setInterval</a>(logRef / delta, logRef * delta);
466
<a name="l00647"></a>00647 }
467
<a name="l00648"></a>00648
468
<a name="l00649"></a>00649 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">testAttribute</a>(QwtScaleEngine::IncludeReference))
469
<a name="l00650"></a>00650 interval = interval.<a class="code" href="class_qwt_double_interval.html#718e883366caa45e24b2ba4b9d529f11">extend</a>(logRef);
470
<a name="l00651"></a>00651
471
<a name="l00652"></a>00652 interval = interval.<a class="code" href="class_qwt_double_interval.html#c6fa1c3aaec36930090310f86a83f84f">limited</a>(LOG_MIN, LOG_MAX);
472
<a name="l00653"></a>00653
473
<a name="l00654"></a>00654 <span class="keywordflow">if</span> (interval.<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>() == 0.0)
474
<a name="l00655"></a>00655 interval = <a class="code" href="class_qwt_scale_engine.html#614c8bc7c24000b0461ed1e63a0d1db8">buildInterval</a>(interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>());
475
<a name="l00656"></a>00656
476
<a name="l00657"></a>00657 stepSize = <a class="code" href="class_qwt_scale_engine.html#ff30158c5ccfee78f4c3e01c0fb5f4de">divideInterval</a>(<a class="code" href="class_qwt_log10_scale_engine.html#80231a2bc3dc0220f5a704b88f9f7321">log10</a>(interval).width(), qwtMax(maxNumSteps, 1));
477
<a name="l00658"></a>00658 <span class="keywordflow">if</span> ( stepSize < 1.0 )
478
<a name="l00659"></a>00659 stepSize = 1.0;
479
<a name="l00660"></a>00660
480
<a name="l00661"></a>00661 <span class="keywordflow">if</span> (!<a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">testAttribute</a>(QwtScaleEngine::Floating))
481
<a name="l00662"></a>00662 interval = align(interval, stepSize);
482
<a name="l00663"></a>00663
483
<a name="l00664"></a>00664 x1 = interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>();
484
<a name="l00665"></a>00665 x2 = interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>();
485
<a name="l00666"></a>00666
486
<a name="l00667"></a>00667 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_scale_engine.html#83a925f83808859d02c85fa0d3ae432e">testAttribute</a>(QwtScaleEngine::Inverted))
487
<a name="l00668"></a>00668 {
488
<a name="l00669"></a>00669 qSwap(x1, x2);
489
<a name="l00670"></a>00670 stepSize = -stepSize;
490
<a name="l00671"></a>00671 }
491
<a name="l00672"></a>00672 }
492
<a name="l00673"></a>00673
493
<a name="l00686"></a><a class="code" href="class_qwt_log10_scale_engine.html#302caf0da5f30265827b8d4e9b0cfedb">00686</a> <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a> <a class="code" href="class_qwt_log10_scale_engine.html#302caf0da5f30265827b8d4e9b0cfedb">QwtLog10ScaleEngine::divideScale</a>(<span class="keywordtype">double</span> x1, <span class="keywordtype">double</span> x2,
494
<a name="l00687"></a>00687 <span class="keywordtype">int</span> maxMajSteps, <span class="keywordtype">int</span> maxMinSteps, <span class="keywordtype">double</span> stepSize)<span class="keyword"> const</span>
495
<a name="l00688"></a>00688 <span class="keyword"></span>{
496
<a name="l00689"></a>00689 <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> interval = <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a>(x1, x2).<a class="code" href="class_qwt_double_interval.html#51a270cbfdd25f47ba8f26a16e27bf26">normalized</a>();
497
<a name="l00690"></a>00690 interval = interval.<a class="code" href="class_qwt_double_interval.html#c6fa1c3aaec36930090310f86a83f84f">limited</a>(LOG_MIN, LOG_MAX);
498
<a name="l00691"></a>00691
499
<a name="l00692"></a>00692 <span class="keywordflow">if</span> (interval.<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>() <= 0 )
500
<a name="l00693"></a>00693 <span class="keywordflow">return</span> <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a>();
501
<a name="l00694"></a>00694
502
<a name="l00695"></a>00695 <span class="keywordflow">if</span> (interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>() / interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>() < 10.0)
503
<a name="l00696"></a>00696 {
504
<a name="l00697"></a>00697 <span class="comment">// scale width is less than one decade -> build linear scale</span>
505
<a name="l00698"></a>00698
506
<a name="l00699"></a>00699 <a class="code" href="class_qwt_linear_scale_engine.html">QwtLinearScaleEngine</a> linearScaler;
507
<a name="l00700"></a>00700 linearScaler.<a class="code" href="class_qwt_scale_engine.html#d221d715e28e644975c6cbda9cae492e">setAttributes</a>(<a class="code" href="class_qwt_scale_engine.html#b4a6561bd3173d17b5407e93270f1628">attributes</a>());
508
<a name="l00701"></a>00701 linearScaler.<a class="code" href="class_qwt_scale_engine.html#89985ea69dbd858c8b9162ecd2be936e">setReference</a>(<a class="code" href="class_qwt_scale_engine.html#041c9485898ea504d9a57ad200438d72">reference</a>());
509
<a name="l00702"></a>00702 linearScaler.<a class="code" href="class_qwt_scale_engine.html#d6e83875e5e7a65b005ebb6213e1e869">setMargins</a>(<a class="code" href="class_qwt_scale_engine.html#bb67c0d07c05c41ad4ad67c3ccaffa1b">loMargin</a>(), <a class="code" href="class_qwt_scale_engine.html#7ad7e9a499cc399732b0720f545270e0">hiMargin</a>());
510
<a name="l00703"></a>00703
511
<a name="l00704"></a>00704 <span class="keywordflow">return</span> linearScaler.<a class="code" href="class_qwt_linear_scale_engine.html#9f74287e61d1abfc2096cc88222c132a">divideScale</a>(x1, x2,
512
<a name="l00705"></a>00705 maxMajSteps, maxMinSteps, stepSize);
513
<a name="l00706"></a>00706 }
514
<a name="l00707"></a>00707
515
<a name="l00708"></a>00708 stepSize = qwtAbs(stepSize);
516
<a name="l00709"></a>00709 <span class="keywordflow">if</span> ( stepSize == 0.0 )
517
<a name="l00710"></a>00710 {
518
<a name="l00711"></a>00711 <span class="keywordflow">if</span> ( maxMajSteps < 1 )
519
<a name="l00712"></a>00712 maxMajSteps = 1;
520
<a name="l00713"></a>00713
521
<a name="l00714"></a>00714 stepSize = <a class="code" href="class_qwt_scale_engine.html#ff30158c5ccfee78f4c3e01c0fb5f4de">divideInterval</a>(<a class="code" href="class_qwt_log10_scale_engine.html#80231a2bc3dc0220f5a704b88f9f7321">log10</a>(interval).width(), maxMajSteps);
522
<a name="l00715"></a>00715 <span class="keywordflow">if</span> ( stepSize < 1.0 )
523
<a name="l00716"></a>00716 stepSize = 1.0; <span class="comment">// major step must be >= 1 decade</span>
524
<a name="l00717"></a>00717 }
525
<a name="l00718"></a>00718
526
<a name="l00719"></a>00719 <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a> scaleDiv;
527
<a name="l00720"></a>00720 <span class="keywordflow">if</span> ( stepSize != 0.0 )
528
<a name="l00721"></a>00721 {
529
<a name="l00722"></a>00722 QwtValueList ticks[QwtScaleDiv::NTickTypes];
530
<a name="l00723"></a>00723 buildTicks(interval, stepSize, maxMinSteps, ticks);
531
<a name="l00724"></a>00724
532
<a name="l00725"></a>00725 scaleDiv = <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a>(interval, ticks);
533
<a name="l00726"></a>00726 }
534
<a name="l00727"></a>00727
535
<a name="l00728"></a>00728 <span class="keywordflow">if</span> ( x1 > x2 )
536
<a name="l00729"></a>00729 scaleDiv.<a class="code" href="class_qwt_scale_div.html#1ea38d52d5836fd4376f480180973786">invert</a>();
537
<a name="l00730"></a>00730
538
<a name="l00731"></a>00731 <span class="keywordflow">return</span> scaleDiv;
539
<a name="l00732"></a>00732 }
540
<a name="l00733"></a>00733
541
<a name="l00734"></a>00734 <span class="keywordtype">void</span> QwtLog10ScaleEngine::buildTicks(
542
<a name="l00735"></a>00735 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a>& interval, <span class="keywordtype">double</span> stepSize, <span class="keywordtype">int</span> maxMinSteps,
543
<a name="l00736"></a>00736 QwtValueList ticks[QwtScaleDiv::NTickTypes])<span class="keyword"> const</span>
544
<a name="l00737"></a>00737 <span class="keyword"></span>{
545
<a name="l00738"></a>00738 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> boundingInterval =
546
<a name="l00739"></a>00739 align(interval, stepSize);
547
<a name="l00740"></a>00740
548
<a name="l00741"></a>00741 ticks[QwtScaleDiv::MajorTick] =
549
<a name="l00742"></a>00742 buildMajorTicks(boundingInterval, stepSize);
550
<a name="l00743"></a>00743
551
<a name="l00744"></a>00744 <span class="keywordflow">if</span> ( maxMinSteps > 0 )
552
<a name="l00745"></a>00745 {
553
<a name="l00746"></a>00746 ticks[QwtScaleDiv::MinorTick] = buildMinorTicks(
554
<a name="l00747"></a>00747 ticks[QwtScaleDiv::MajorTick], maxMinSteps, stepSize);
555
<a name="l00748"></a>00748 }
556
<a name="l00749"></a>00749
557
<a name="l00750"></a>00750 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i < QwtScaleDiv::NTickTypes; i++ )
558
<a name="l00751"></a>00751 ticks[i] = <a class="code" href="class_qwt_scale_engine.html#82210ea6ad135a55142578879cb6a8f6">strip</a>(ticks[i], interval);
559
<a name="l00752"></a>00752 }
560
<a name="l00753"></a>00753
561
<a name="l00754"></a>00754 QwtValueList QwtLog10ScaleEngine::buildMajorTicks(
562
<a name="l00755"></a>00755 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval, <span class="keywordtype">double</span> stepSize)<span class="keyword"> const</span>
563
<a name="l00756"></a>00756 <span class="keyword"></span>{
564
<a name="l00757"></a>00757 <span class="keywordtype">double</span> width = <a class="code" href="class_qwt_log10_scale_engine.html#80231a2bc3dc0220f5a704b88f9f7321">log10</a>(interval).<a class="code" href="class_qwt_double_interval.html#8ced366025711dec029d7c71012883fb">width</a>();
565
<a name="l00758"></a>00758
566
<a name="l00759"></a>00759 <span class="keywordtype">int</span> numTicks = qRound(width / stepSize) + 1;
567
<a name="l00760"></a>00760 <span class="keywordflow">if</span> ( numTicks > 10000 )
568
<a name="l00761"></a>00761 numTicks = 10000;
569
<a name="l00762"></a>00762
570
<a name="l00763"></a>00763 <span class="keyword">const</span> <span class="keywordtype">double</span> lxmin = log(interval.minValue());
571
<a name="l00764"></a>00764 <span class="keyword">const</span> <span class="keywordtype">double</span> lxmax = log(interval.maxValue());
572
<a name="l00765"></a>00765 <span class="keyword">const</span> <span class="keywordtype">double</span> lstep = (lxmax - lxmin) / <span class="keywordtype">double</span>(numTicks - 1);
573
<a name="l00766"></a>00766
574
<a name="l00767"></a>00767 QwtValueList ticks;
575
<a name="l00768"></a>00768
576
<a name="l00769"></a>00769 ticks += interval.minValue();
577
<a name="l00770"></a>00770
578
<a name="l00771"></a>00771 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < numTicks; i++)
579
<a name="l00772"></a>00772 ticks += exp(lxmin + <span class="keywordtype">double</span>(i) * lstep);
580
<a name="l00773"></a>00773
581
<a name="l00774"></a>00774 ticks += interval.maxValue();
582
<a name="l00775"></a>00775
583
<a name="l00776"></a>00776 <span class="keywordflow">return</span> ticks;
584
<a name="l00777"></a>00777 }
585
<a name="l00778"></a>00778
586
<a name="l00779"></a>00779 QwtValueList QwtLog10ScaleEngine::buildMinorTicks(
587
<a name="l00780"></a>00780 <span class="keyword">const</span> QwtValueList &majorTicks,
588
<a name="l00781"></a>00781 <span class="keywordtype">int</span> maxMinSteps, <span class="keywordtype">double</span> stepSize)<span class="keyword"> const</span>
589
<a name="l00782"></a>00782 <span class="keyword"></span>{
590
<a name="l00783"></a>00783 <span class="keywordflow">if</span> (stepSize < 1.1) <span class="comment">// major step width is one decade</span>
591
<a name="l00784"></a>00784 {
592
<a name="l00785"></a>00785 <span class="keywordflow">if</span> ( maxMinSteps < 1 )
593
<a name="l00786"></a>00786 <span class="keywordflow">return</span> QwtValueList();
594
<a name="l00787"></a>00787
595
<a name="l00788"></a>00788 <span class="keywordtype">int</span> k0, kstep, kmax;
596
<a name="l00789"></a>00789
597
<a name="l00790"></a>00790 <span class="keywordflow">if</span> (maxMinSteps >= 8)
598
<a name="l00791"></a>00791 {
599
<a name="l00792"></a>00792 k0 = 2;
600
<a name="l00793"></a>00793 kmax = 9;
601
<a name="l00794"></a>00794 kstep = 1;
602
<a name="l00795"></a>00795 }
603
<a name="l00796"></a>00796 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (maxMinSteps >= 4)
604
<a name="l00797"></a>00797 {
605
<a name="l00798"></a>00798 k0 = 2;
606
<a name="l00799"></a>00799 kmax = 8;
607
<a name="l00800"></a>00800 kstep = 2;
608
<a name="l00801"></a>00801 }
609
<a name="l00802"></a>00802 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (maxMinSteps >= 2)
610
<a name="l00803"></a>00803 {
611
<a name="l00804"></a>00804 k0 = 2;
612
<a name="l00805"></a>00805 kmax = 5;
613
<a name="l00806"></a>00806 kstep = 3;
614
<a name="l00807"></a>00807 }
615
<a name="l00808"></a>00808 <span class="keywordflow">else</span>
616
<a name="l00809"></a>00809 {
617
<a name="l00810"></a>00810 k0 = 5;
618
<a name="l00811"></a>00811 kmax = 5;
619
<a name="l00812"></a>00812 kstep = 1;
620
<a name="l00813"></a>00813 }
621
<a name="l00814"></a>00814
622
<a name="l00815"></a>00815 QwtValueList minorTicks;
623
<a name="l00816"></a>00816
624
<a name="l00817"></a>00817 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < (int)majorTicks.count(); i++)
625
<a name="l00818"></a>00818 {
626
<a name="l00819"></a>00819 <span class="keyword">const</span> <span class="keywordtype">double</span> v = majorTicks[i];
627
<a name="l00820"></a>00820 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> k = k0; k<= kmax; k+=kstep)
628
<a name="l00821"></a>00821 minorTicks += v * <span class="keywordtype">double</span>(k);
629
<a name="l00822"></a>00822 }
630
<a name="l00823"></a>00823
631
<a name="l00824"></a>00824 <span class="keywordflow">return</span> minorTicks;
632
<a name="l00825"></a>00825 }
633
<a name="l00826"></a>00826 <span class="keywordflow">else</span> <span class="comment">// major step > one decade</span>
634
<a name="l00827"></a>00827 {
635
<a name="l00828"></a>00828 <span class="keywordtype">double</span> minStep = <a class="code" href="class_qwt_scale_engine.html#ff30158c5ccfee78f4c3e01c0fb5f4de">divideInterval</a>(stepSize, maxMinSteps);
636
<a name="l00829"></a>00829 <span class="keywordflow">if</span> ( minStep == 0.0 )
637
<a name="l00830"></a>00830 <span class="keywordflow">return</span> QwtValueList();
638
<a name="l00831"></a>00831
639
<a name="l00832"></a>00832 <span class="keywordflow">if</span> ( minStep < 1.0 )
640
<a name="l00833"></a>00833 minStep = 1.0;
641
<a name="l00834"></a>00834
642
<a name="l00835"></a>00835 <span class="comment">// # subticks per interval</span>
643
<a name="l00836"></a>00836 <span class="keywordtype">int</span> nMin = qRound(stepSize / minStep) - 1;
644
<a name="l00837"></a>00837
645
<a name="l00838"></a>00838 <span class="comment">// Do the minor steps fit into the interval?</span>
646
<a name="l00839"></a>00839
647
<a name="l00840"></a>00840 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">QwtScaleArithmetic::compareEps</a>((nMin + 1) * minStep,
648
<a name="l00841"></a>00841 qwtAbs(stepSize), stepSize) > 0)
649
<a name="l00842"></a>00842 {
650
<a name="l00843"></a>00843 nMin = 0;
651
<a name="l00844"></a>00844 }
652
<a name="l00845"></a>00845
653
<a name="l00846"></a>00846 <span class="keywordflow">if</span> (nMin < 1)
654
<a name="l00847"></a>00847 <span class="keywordflow">return</span> QwtValueList(); <span class="comment">// no subticks</span>
655
<a name="l00848"></a>00848
656
<a name="l00849"></a>00849 <span class="comment">// substep factor = 10^substeps</span>
657
<a name="l00850"></a>00850 <span class="keyword">const</span> <span class="keywordtype">double</span> minFactor = qwtMax(pow(10.0, minStep), 10.0);
658
<a name="l00851"></a>00851
659
<a name="l00852"></a>00852 QwtValueList minorTicks;
660
<a name="l00853"></a>00853 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < (int)majorTicks.count(); i++)
661
<a name="l00854"></a>00854 {
662
<a name="l00855"></a>00855 <span class="keywordtype">double</span> val = majorTicks[i];
663
<a name="l00856"></a>00856 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> k=0; k< nMin; k++)
664
<a name="l00857"></a>00857 {
665
<a name="l00858"></a>00858 val *= minFactor;
666
<a name="l00859"></a>00859 minorTicks += val;
667
<a name="l00860"></a>00860 }
668
<a name="l00861"></a>00861 }
669
<a name="l00862"></a>00862 <span class="keywordflow">return</span> minorTicks;
670
<a name="l00863"></a>00863 }
671
<a name="l00864"></a>00864 }
672
<a name="l00865"></a>00865
673
<a name="l00877"></a>00877 <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> QwtLog10ScaleEngine::align(
674
<a name="l00878"></a>00878 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval, <span class="keywordtype">double</span> stepSize)<span class="keyword"> const</span>
675
<a name="l00879"></a>00879 <span class="keyword"></span>{
676
<a name="l00880"></a>00880 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> intv = <a class="code" href="class_qwt_log10_scale_engine.html#80231a2bc3dc0220f5a704b88f9f7321">log10</a>(interval);
677
<a name="l00881"></a>00881
678
<a name="l00882"></a>00882 <span class="keyword">const</span> <span class="keywordtype">double</span> x1 = <a class="code" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">QwtScaleArithmetic::floorEps</a>(intv.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>(), stepSize);
679
<a name="l00883"></a>00883 <span class="keyword">const</span> <span class="keywordtype">double</span> x2 = <a class="code" href="class_qwt_scale_arithmetic.html#86da4fc0928457d03201d8b520d7d816">QwtScaleArithmetic::ceilEps</a>(intv.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>(), stepSize);
680
<a name="l00884"></a>00884
681
<a name="l00885"></a>00885 <span class="keywordflow">return</span> <a class="code" href="class_qwt_log10_scale_engine.html#ddcc3947e2e5183a2cc32db948d23190">pow10</a>(<a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a>(x1, x2));
682
<a name="l00886"></a>00886 }
683
<a name="l00887"></a>00887
684
<a name="l00892"></a><a class="code" href="class_qwt_log10_scale_engine.html#80231a2bc3dc0220f5a704b88f9f7321">00892</a> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> <a class="code" href="class_qwt_log10_scale_engine.html#80231a2bc3dc0220f5a704b88f9f7321">QwtLog10ScaleEngine::log10</a>(
685
<a name="l00893"></a>00893 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval)<span class="keyword"> const</span>
686
<a name="l00894"></a>00894 <span class="keyword"></span>{
687
<a name="l00895"></a>00895 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a>(::<a class="code" href="class_qwt_log10_scale_engine.html#80231a2bc3dc0220f5a704b88f9f7321">log10</a>(interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>()),
688
<a name="l00896"></a>00896 ::<a class="code" href="class_qwt_log10_scale_engine.html#80231a2bc3dc0220f5a704b88f9f7321">log10</a>(interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>()));
689
<a name="l00897"></a>00897 }
690
<a name="l00898"></a>00898
691
<a name="l00902"></a><a class="code" href="class_qwt_log10_scale_engine.html#ddcc3947e2e5183a2cc32db948d23190">00902</a> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> <a class="code" href="class_qwt_log10_scale_engine.html#ddcc3947e2e5183a2cc32db948d23190">QwtLog10ScaleEngine::pow10</a>(
692
<a name="l00903"></a>00903 <span class="keyword">const</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &interval)<span class="keyword"> const</span>
693
<a name="l00904"></a>00904 <span class="keyword"></span>{
694
<a name="l00905"></a>00905 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_interval.html">QwtDoubleInterval</a>(pow(10.0, interval.<a class="code" href="class_qwt_double_interval.html#63ebec423f5f8bf165e48836fcd8fc0a">minValue</a>()),
695
<a name="l00906"></a>00906 pow(10.0, interval.<a class="code" href="class_qwt_double_interval.html#d8aac16fed2fe4dae576096db91da18d">maxValue</a>()));
696
<a name="l00907"></a>00907 }
697
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sat May 24 18:47:40 2008 for Qwt User's Guide by
698
<a href="http://www.doxygen.org/index.html">
699
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.0 </small></address>
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qwt-5.1.1/doc/html/qwt__scale__engine_8cpp-source.html
