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<h1>qwt_double_range.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 <cfloat></span>
30
<a name="l00011"></a>00011 <span class="preprocessor">#include "qwt_double_range.h"</span>
31
<a name="l00012"></a>00012 <span class="preprocessor">#include "qwt_math.h"</span>
32
<a name="l00013"></a>00013
33
<a name="l00014"></a>00014 <span class="keyword">static</span> <span class="keywordtype">double</span> MinRelStep = 1.0e-10;
34
<a name="l00015"></a>00015 <span class="keyword">static</span> <span class="keywordtype">double</span> DefaultRelStep = 1.0e-2;
35
<a name="l00016"></a>00016 <span class="keyword">static</span> <span class="keywordtype">double</span> MinEps = 1.0e-10;
36
<a name="l00017"></a>00017
37
<a name="l00022"></a><a class="code" href="class_qwt_double_range.html#86f9f76df03d7917d88a95d1667f2d72">00022</a> <a class="code" href="class_qwt_double_range.html#86f9f76df03d7917d88a95d1667f2d72">QwtDoubleRange::QwtDoubleRange</a>():
38
<a name="l00023"></a>00023 d_minValue(0.0),
39
<a name="l00024"></a>00024 d_maxValue(0.0),
40
<a name="l00025"></a>00025 d_step(1.0),
41
<a name="l00026"></a>00026 d_pageSize(1),
42
<a name="l00027"></a>00027 d_isValid(false),
43
<a name="l00028"></a>00028 d_value(0.0),
44
<a name="l00029"></a>00029 d_exactValue(0.0),
45
<a name="l00030"></a>00030 d_exactPrevValue(0.0),
46
<a name="l00031"></a>00031 d_prevValue(0.0),
47
<a name="l00032"></a>00032 d_periodic(false)
48
<a name="l00033"></a>00033 {
49
<a name="l00034"></a>00034 }
50
<a name="l00035"></a>00035
51
<a name="l00037"></a><a class="code" href="class_qwt_double_range.html#bdcecda4b14ba81cfdaf063e2b98a22d">00037</a> <a class="code" href="class_qwt_double_range.html#bdcecda4b14ba81cfdaf063e2b98a22d">QwtDoubleRange::~QwtDoubleRange</a>()
52
<a name="l00038"></a>00038 {
53
<a name="l00039"></a>00039 }
54
<a name="l00040"></a>00040
55
<a name="l00042"></a><a class="code" href="class_qwt_double_range.html#50a9c386663e170016a74cf8ee28ab8f">00042</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#50a9c386663e170016a74cf8ee28ab8f">QwtDoubleRange::setValid</a>(<span class="keywordtype">bool</span> isValid)
56
<a name="l00043"></a>00043 {
57
<a name="l00044"></a>00044 <span class="keywordflow">if</span> ( isValid != d_isValid )
58
<a name="l00045"></a>00045 {
59
<a name="l00046"></a>00046 d_isValid = isValid;
60
<a name="l00047"></a>00047 <a class="code" href="class_qwt_double_range.html#1d50398342d6aa1d9cd86650ee29aff8">valueChange</a>();
61
<a name="l00048"></a>00048 }
62
<a name="l00049"></a>00049 }
63
<a name="l00050"></a>00050
64
<a name="l00052"></a><a class="code" href="class_qwt_double_range.html#5d918955c0facde55f1118a474e92e65">00052</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_double_range.html#5d918955c0facde55f1118a474e92e65">QwtDoubleRange::isValid</a>()<span class="keyword"> const</span>
65
<a name="l00053"></a>00053 <span class="keyword"></span>{
66
<a name="l00054"></a>00054 <span class="keywordflow">return</span> d_isValid;
67
<a name="l00055"></a>00055 }
68
<a name="l00056"></a>00056
69
<a name="l00065"></a>00065 <span class="keywordtype">void</span> QwtDoubleRange::setNewValue(<span class="keywordtype">double</span> x, <span class="keywordtype">bool</span> align)
70
<a name="l00066"></a>00066 {
71
<a name="l00067"></a>00067 <span class="keywordtype">double</span> vmin,vmax;
72
<a name="l00068"></a>00068
73
<a name="l00069"></a>00069 d_prevValue = d_value;
74
<a name="l00070"></a>00070
75
<a name="l00071"></a>00071 vmin = qwtMin(d_minValue, d_maxValue);
76
<a name="l00072"></a>00072 vmax = qwtMax(d_minValue, d_maxValue);
77
<a name="l00073"></a>00073
78
<a name="l00074"></a>00074 <span class="comment">// </span>
79
<a name="l00075"></a>00075 <span class="comment">// Range check</span>
80
<a name="l00076"></a>00076 <span class="comment">//</span>
81
<a name="l00077"></a>00077 <span class="keywordflow">if</span> (x < vmin)
82
<a name="l00078"></a>00078 {
83
<a name="l00079"></a>00079 <span class="keywordflow">if</span> ((d_periodic) && (vmin != vmax))
84
<a name="l00080"></a>00080 d_value = x + ::ceil( (vmin - x) / (vmax - vmin ) )
85
<a name="l00081"></a>00081 * (vmax - vmin);
86
<a name="l00082"></a>00082 <span class="keywordflow">else</span>
87
<a name="l00083"></a>00083 d_value = vmin;
88
<a name="l00084"></a>00084 }
89
<a name="l00085"></a>00085 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (x > vmax)
90
<a name="l00086"></a>00086 {
91
<a name="l00087"></a>00087 <span class="keywordflow">if</span> ((d_periodic) && (vmin != vmax))
92
<a name="l00088"></a>00088 d_value = x - ::ceil( ( x - vmax) / (vmax - vmin ))
93
<a name="l00089"></a>00089 * (vmax - vmin);
94
<a name="l00090"></a>00090 <span class="keywordflow">else</span>
95
<a name="l00091"></a>00091 d_value = vmax;
96
<a name="l00092"></a>00092 }
97
<a name="l00093"></a>00093 <span class="keywordflow">else</span>
98
<a name="l00094"></a>00094 d_value = x;
99
<a name="l00095"></a>00095
100
<a name="l00096"></a>00096 d_exactPrevValue = d_exactValue;
101
<a name="l00097"></a>00097 d_exactValue = d_value;
102
<a name="l00098"></a>00098
103
<a name="l00099"></a>00099 <span class="comment">// align to grid</span>
104
<a name="l00100"></a>00100 <span class="keywordflow">if</span> (align)
105
<a name="l00101"></a>00101 {
106
<a name="l00102"></a>00102 <span class="keywordflow">if</span> (d_step != 0.0)
107
<a name="l00103"></a>00103 {
108
<a name="l00104"></a>00104 d_value = d_minValue +
109
<a name="l00105"></a>00105 qwtRound((d_value - d_minValue) / d_step) * d_step;
110
<a name="l00106"></a>00106 }
111
<a name="l00107"></a>00107 <span class="keywordflow">else</span>
112
<a name="l00108"></a>00108 d_value = d_minValue;
113
<a name="l00109"></a>00109
114
<a name="l00110"></a>00110 <span class="comment">// correct rounding error at the border</span>
115
<a name="l00111"></a>00111 <span class="keywordflow">if</span> (fabs(d_value - d_maxValue) < MinEps * qwtAbs(d_step))
116
<a name="l00112"></a>00112 d_value = d_maxValue;
117
<a name="l00113"></a>00113
118
<a name="l00114"></a>00114 <span class="comment">// correct rounding error if value = 0</span>
119
<a name="l00115"></a>00115 <span class="keywordflow">if</span> (::fabs(d_value) < MinEps * qwtAbs(d_step))
120
<a name="l00116"></a>00116 d_value = 0.0;
121
<a name="l00117"></a>00117 }
122
<a name="l00118"></a>00118
123
<a name="l00119"></a>00119 <span class="keywordflow">if</span> (!d_isValid || d_prevValue != d_value)
124
<a name="l00120"></a>00120 {
125
<a name="l00121"></a>00121 d_isValid = <span class="keyword">true</span>;
126
<a name="l00122"></a>00122 <a class="code" href="class_qwt_double_range.html#1d50398342d6aa1d9cd86650ee29aff8">valueChange</a>();
127
<a name="l00123"></a>00123 }
128
<a name="l00124"></a>00124 }
129
<a name="l00125"></a>00125
130
<a name="l00135"></a><a class="code" href="class_qwt_double_range.html#63bc8ea5e7ecd776b7d32d21db1ea668">00135</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#63bc8ea5e7ecd776b7d32d21db1ea668">QwtDoubleRange::fitValue</a>(<span class="keywordtype">double</span> x)
131
<a name="l00136"></a>00136 {
132
<a name="l00137"></a>00137 setNewValue(x, <span class="keyword">true</span>);
133
<a name="l00138"></a>00138 }
134
<a name="l00139"></a>00139
135
<a name="l00140"></a>00140
136
<a name="l00150"></a><a class="code" href="class_qwt_double_range.html#f6a3aa74c970a2bef29f0c1af99720e8">00150</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#f6a3aa74c970a2bef29f0c1af99720e8">QwtDoubleRange::setValue</a>(<span class="keywordtype">double</span> x)
137
<a name="l00151"></a>00151 {
138
<a name="l00152"></a>00152 setNewValue(x, <span class="keyword">false</span>);
139
<a name="l00153"></a>00153 }
140
<a name="l00154"></a>00154
141
<a name="l00172"></a><a class="code" href="class_qwt_double_range.html#43891011664b74b8e5454763a3f5ff21">00172</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#43891011664b74b8e5454763a3f5ff21">QwtDoubleRange::setRange</a>(<span class="keywordtype">double</span> vmin, <span class="keywordtype">double</span> vmax, <span class="keywordtype">double</span> vstep, <span class="keywordtype">int</span> pageSize)
142
<a name="l00173"></a>00173 {
143
<a name="l00174"></a>00174 <span class="keywordtype">bool</span> rchg = ((d_maxValue != vmax) || (d_minValue != vmin));
144
<a name="l00175"></a>00175
145
<a name="l00176"></a>00176 <span class="keywordflow">if</span> (rchg)
146
<a name="l00177"></a>00177 {
147
<a name="l00178"></a>00178 d_minValue = vmin;
148
<a name="l00179"></a>00179 d_maxValue = vmax;
149
<a name="l00180"></a>00180 }
150
<a name="l00181"></a>00181
151
<a name="l00182"></a>00182 <span class="comment">//</span>
152
<a name="l00183"></a>00183 <span class="comment">// look if the step width has an acceptable </span>
153
<a name="l00184"></a>00184 <span class="comment">// value or otherwise change it.</span>
154
<a name="l00185"></a>00185 <span class="comment">//</span>
155
<a name="l00186"></a>00186 <a class="code" href="class_qwt_double_range.html#29ed5fc66439def424a8ad773eea285d">setStep</a>(vstep);
156
<a name="l00187"></a>00187
157
<a name="l00188"></a>00188 <span class="comment">//</span>
158
<a name="l00189"></a>00189 <span class="comment">// limit page size</span>
159
<a name="l00190"></a>00190 <span class="comment">//</span>
160
<a name="l00191"></a>00191 d_pageSize = qwtLim(pageSize,0,
161
<a name="l00192"></a>00192 <span class="keywordtype">int</span>(qwtAbs((d_maxValue - d_minValue) / d_step)));
162
<a name="l00193"></a>00193
163
<a name="l00194"></a>00194 <span class="comment">// </span>
164
<a name="l00195"></a>00195 <span class="comment">// If the value lies out of the range, it </span>
165
<a name="l00196"></a>00196 <span class="comment">// will be changed. Note that it will not be adjusted to </span>
166
<a name="l00197"></a>00197 <span class="comment">// the new step width.</span>
167
<a name="l00198"></a>00198 setNewValue(d_value, <span class="keyword">false</span>);
168
<a name="l00199"></a>00199
169
<a name="l00200"></a>00200 <span class="comment">// call notifier after the step width has been </span>
170
<a name="l00201"></a>00201 <span class="comment">// adjusted.</span>
171
<a name="l00202"></a>00202 <span class="keywordflow">if</span> (rchg)
172
<a name="l00203"></a>00203 <a class="code" href="class_qwt_double_range.html#3583134a1ac32706aa4742088bb9d4dc">rangeChange</a>();
173
<a name="l00204"></a>00204 }
174
<a name="l00205"></a>00205
175
<a name="l00211"></a><a class="code" href="class_qwt_double_range.html#29ed5fc66439def424a8ad773eea285d">00211</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#29ed5fc66439def424a8ad773eea285d">QwtDoubleRange::setStep</a>(<span class="keywordtype">double</span> vstep)
176
<a name="l00212"></a>00212 {
177
<a name="l00213"></a>00213 <span class="keywordtype">double</span> intv = d_maxValue - d_minValue;
178
<a name="l00214"></a>00214
179
<a name="l00215"></a>00215 <span class="keywordtype">double</span> newStep;
180
<a name="l00216"></a>00216 <span class="keywordflow">if</span> (vstep == 0.0)
181
<a name="l00217"></a>00217 newStep = intv * DefaultRelStep;
182
<a name="l00218"></a>00218 <span class="keywordflow">else</span>
183
<a name="l00219"></a>00219 {
184
<a name="l00220"></a>00220 <span class="keywordflow">if</span> ((intv > 0) && (vstep < 0) || (intv < 0) && (vstep > 0))
185
<a name="l00221"></a>00221 newStep = -vstep;
186
<a name="l00222"></a>00222 <span class="keywordflow">else</span>
187
<a name="l00223"></a>00223 newStep = vstep;
188
<a name="l00224"></a>00224
189
<a name="l00225"></a>00225 <span class="keywordflow">if</span> ( fabs(newStep) < fabs(MinRelStep * intv) )
190
<a name="l00226"></a>00226 newStep = MinRelStep * intv;
191
<a name="l00227"></a>00227 }
192
<a name="l00228"></a>00228
193
<a name="l00229"></a>00229 <span class="keywordflow">if</span> (newStep != d_step)
194
<a name="l00230"></a>00230 {
195
<a name="l00231"></a>00231 d_step = newStep;
196
<a name="l00232"></a>00232 <a class="code" href="class_qwt_double_range.html#86641f8755ed172ca4cf72d36df539ca">stepChange</a>();
197
<a name="l00233"></a>00233 }
198
<a name="l00234"></a>00234 }
199
<a name="l00235"></a>00235
200
<a name="l00236"></a>00236
201
<a name="l00251"></a><a class="code" href="class_qwt_double_range.html#95fa6a4e44fc47726d939155bb6f6f1f">00251</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#95fa6a4e44fc47726d939155bb6f6f1f">QwtDoubleRange::setPeriodic</a>(<span class="keywordtype">bool</span> tf)
202
<a name="l00252"></a>00252 {
203
<a name="l00253"></a>00253 d_periodic = tf;
204
<a name="l00254"></a>00254 }
205
<a name="l00255"></a>00255
206
<a name="l00262"></a><a class="code" href="class_qwt_double_range.html#299c35c72e9b69f5a0e3dcd2b7da775b">00262</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#299c35c72e9b69f5a0e3dcd2b7da775b">QwtDoubleRange::incValue</a>(<span class="keywordtype">int</span> nSteps)
207
<a name="l00263"></a>00263 {
208
<a name="l00264"></a>00264 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_double_range.html#5d918955c0facde55f1118a474e92e65">isValid</a>() )
209
<a name="l00265"></a>00265 setNewValue(d_value + <span class="keywordtype">double</span>(nSteps) * d_step, <span class="keyword">true</span>);
210
<a name="l00266"></a>00266 }
211
<a name="l00267"></a>00267
212
<a name="l00274"></a><a class="code" href="class_qwt_double_range.html#19b85337d4ab0b5f0579b02e4fb29a8f">00274</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#19b85337d4ab0b5f0579b02e4fb29a8f">QwtDoubleRange::incPages</a>(<span class="keywordtype">int</span> nPages)
213
<a name="l00275"></a>00275 {
214
<a name="l00276"></a>00276 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_double_range.html#5d918955c0facde55f1118a474e92e65">isValid</a>() )
215
<a name="l00277"></a>00277 setNewValue(d_value + <span class="keywordtype">double</span>(nPages) * <span class="keywordtype">double</span>(d_pageSize) * d_step, <span class="keyword">true</span>);
216
<a name="l00278"></a>00278 }
217
<a name="l00279"></a>00279
218
<a name="l00286"></a><a class="code" href="class_qwt_double_range.html#1d50398342d6aa1d9cd86650ee29aff8">00286</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#1d50398342d6aa1d9cd86650ee29aff8">QwtDoubleRange::valueChange</a>()
219
<a name="l00287"></a>00287 {
220
<a name="l00288"></a>00288 }
221
<a name="l00289"></a>00289
222
<a name="l00290"></a>00290
223
<a name="l00297"></a><a class="code" href="class_qwt_double_range.html#3583134a1ac32706aa4742088bb9d4dc">00297</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#3583134a1ac32706aa4742088bb9d4dc">QwtDoubleRange::rangeChange</a>()
224
<a name="l00298"></a>00298 {
225
<a name="l00299"></a>00299 }
226
<a name="l00300"></a>00300
227
<a name="l00301"></a>00301
228
<a name="l00308"></a><a class="code" href="class_qwt_double_range.html#86641f8755ed172ca4cf72d36df539ca">00308</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_double_range.html#86641f8755ed172ca4cf72d36df539ca">QwtDoubleRange::stepChange</a>()
229
<a name="l00309"></a>00309 {
230
<a name="l00310"></a>00310 }
231
<a name="l00311"></a>00311
232
<a name="l00316"></a><a class="code" href="class_qwt_double_range.html#09c68ddcd4b1e9f7cc3cf6a753db9f7d">00316</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_range.html#09c68ddcd4b1e9f7cc3cf6a753db9f7d">QwtDoubleRange::step</a>()<span class="keyword"> const</span>
233
<a name="l00317"></a>00317 <span class="keyword"></span>{
234
<a name="l00318"></a>00318 <span class="keywordflow">return</span> qwtAbs(d_step);
235
<a name="l00319"></a>00319 }
236
<a name="l00320"></a>00320
237
<a name="l00329"></a><a class="code" href="class_qwt_double_range.html#dc07a0603792664d8400e3ba3c3a8f3a">00329</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_range.html#dc07a0603792664d8400e3ba3c3a8f3a">QwtDoubleRange::maxValue</a>()<span class="keyword"> const</span>
238
<a name="l00330"></a>00330 <span class="keyword"></span>{
239
<a name="l00331"></a>00331 <span class="keywordflow">return</span> d_maxValue;
240
<a name="l00332"></a>00332 }
241
<a name="l00333"></a>00333
242
<a name="l00342"></a><a class="code" href="class_qwt_double_range.html#d4cdcc335facc9cdcc12411ad0274169">00342</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_range.html#d4cdcc335facc9cdcc12411ad0274169">QwtDoubleRange::minValue</a>()<span class="keyword"> const </span>
243
<a name="l00343"></a>00343 <span class="keyword"></span>{
244
<a name="l00344"></a>00344 <span class="keywordflow">return</span> d_minValue;
245
<a name="l00345"></a>00345 }
246
<a name="l00346"></a>00346
247
<a name="l00351"></a><a class="code" href="class_qwt_double_range.html#c0f6079142fe5f6782f577485853dd17">00351</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_double_range.html#c0f6079142fe5f6782f577485853dd17">QwtDoubleRange::periodic</a>()<span class="keyword"> const </span>
248
<a name="l00352"></a>00352 <span class="keyword"></span>{
249
<a name="l00353"></a>00353 <span class="keywordflow">return</span> d_periodic;
250
<a name="l00354"></a>00354 }
251
<a name="l00355"></a>00355
252
<a name="l00357"></a><a class="code" href="class_qwt_double_range.html#c1398baec82b3296368670d1509d0009">00357</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_double_range.html#c1398baec82b3296368670d1509d0009">QwtDoubleRange::pageSize</a>()<span class="keyword"> const </span>
253
<a name="l00358"></a>00358 <span class="keyword"></span>{
254
<a name="l00359"></a>00359 <span class="keywordflow">return</span> d_pageSize;
255
<a name="l00360"></a>00360 }
256
<a name="l00361"></a>00361
257
<a name="l00363"></a><a class="code" href="class_qwt_double_range.html#48f21cecc0cbd10f18b234d5bbe55faf">00363</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_range.html#48f21cecc0cbd10f18b234d5bbe55faf">QwtDoubleRange::value</a>()<span class="keyword"> const </span>
258
<a name="l00364"></a>00364 <span class="keyword"></span>{
259
<a name="l00365"></a>00365 <span class="keywordflow">return</span> d_value;
260
<a name="l00366"></a>00366 }
261
<a name="l00367"></a>00367
262
<a name="l00377"></a><a class="code" href="class_qwt_double_range.html#25ae415b7245abbd4d8196acfb2a3adb">00377</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_range.html#25ae415b7245abbd4d8196acfb2a3adb">QwtDoubleRange::exactValue</a>()<span class="keyword"> const </span>
263
<a name="l00378"></a>00378 <span class="keyword"></span>{
264
<a name="l00379"></a>00379 <span class="keywordflow">return</span> d_exactValue;
265
<a name="l00380"></a>00380 }
266
<a name="l00381"></a>00381
267
<a name="l00383"></a><a class="code" href="class_qwt_double_range.html#6ed0459793b62833630e1c7ecbe443a0">00383</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_range.html#6ed0459793b62833630e1c7ecbe443a0">QwtDoubleRange::exactPrevValue</a>()<span class="keyword"> const </span>
268
<a name="l00384"></a>00384 <span class="keyword"></span>{
269
<a name="l00385"></a>00385 <span class="keywordflow">return</span> d_exactPrevValue;
270
<a name="l00386"></a>00386 }
271
<a name="l00387"></a>00387
272
<a name="l00389"></a><a class="code" href="class_qwt_double_range.html#6110eebf7813dee32b42e316081d85ce">00389</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_double_range.html#6110eebf7813dee32b42e316081d85ce">QwtDoubleRange::prevValue</a>()<span class="keyword"> const </span>
273
<a name="l00390"></a>00390 <span class="keyword"></span>{
274
<a name="l00391"></a>00391 <span class="keywordflow">return</span> d_prevValue;
275
<a name="l00392"></a>00392 }
276
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sat May 24 18:47:39 2008 for Qwt User's Guide by
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<a href="http://www.doxygen.org/index.html">
278
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.0 </small></address>
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