1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
<title>Qwt User's Guide: qwt_drange.cpp Source File</title>
<link href="doxygen.css" rel="stylesheet" type="text/css">
</head><body>
<!-- Generated by Doxygen 1.3.8 -->
<div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical List</a> | <a class="qindex" href="annotated.html">Class List</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Class Members</a> | <a class="qindex" href="globals.html">File Members</a> | <a class="qindex" href="pages.html">Related Pages</a></div>
<h1>qwt_drange.cpp</h1><pre class="fragment"><div>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span>
00002 <span class="comment"> * Qwt Widget Library</span>
00003 <span class="comment"> * Copyright (C) 1997 Josef Wilgen</span>
00004 <span class="comment"> * Copyright (C) 2002 Uwe Rathmann</span>
00005 <span class="comment"> * </span>
00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span>
00008 <span class="comment"> *****************************************************************************/</span>
00009
00010 <span class="preprocessor">#include "qwt_drange.h"</span>
00011 <span class="preprocessor">#include "<a class="code" href="qwt__math_8h.html">qwt_math.h</a>"</span>
00012
00013 <span class="keyword">static</span> <span class="keywordtype">double</span> MinRelStep = 1.0e-10;
00014 <span class="keyword">static</span> <span class="keywordtype">double</span> DefaultRelStep = 1.0e-2;
00015 <span class="keyword">static</span> <span class="keywordtype">double</span> MinEps = 1.0e-10;
00016
<a name="l00021"></a><a class="code" href="class_qwt_dbl_range.html#a0">00021</a> <a class="code" href="class_qwt_dbl_range.html#a0">QwtDblRange::QwtDblRange</a>():
00022 d_minValue(0.0),
00023 d_maxValue(100.0),
00024 d_step(1.0),
00025 d_pageSize(1),
00026 d_isValid(FALSE),
00027 d_value(0.0),
00028 d_exactValue(0.0),
00029 d_exactPrevValue(0.0),
00030 d_prevValue(0.0),
00031 d_periodic(FALSE)
00032 {
00033 }
00034
<a name="l00036"></a><a class="code" href="class_qwt_dbl_range.html#a1">00036</a> <a class="code" href="class_qwt_dbl_range.html#a1">QwtDblRange::~QwtDblRange</a>()
00037 {
00038 }
00039
<a name="l00041"></a><a class="code" href="class_qwt_dbl_range.html#a3">00041</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#a3">QwtDblRange::setValid</a>(<span class="keywordtype">bool</span> isValid)
00042 {
00043 <span class="keywordflow">if</span> ( isValid != d_isValid )
00044 {
00045 d_isValid = isValid;
00046 <a class="code" href="class_qwt_dbl_range.html#b3">valueChange</a>();
00047 }
00048 }
00049
<a name="l00051"></a><a class="code" href="class_qwt_dbl_range.html#a4">00051</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_dbl_range.html#a4">QwtDblRange::isValid</a>()<span class="keyword"> const</span>
00052 <span class="keyword"></span>{
00053 <span class="keywordflow">return</span> d_isValid;
00054 }
00055
00064 <span class="keywordtype">void</span> QwtDblRange::setNewValue(<span class="keywordtype">double</span> x, <span class="keywordtype">int</span> align)
00065 {
00066 <span class="keywordtype">double</span> vmin,vmax;
00067
00068 d_prevValue = d_value;
00069
00070 vmin = qwtMin(d_minValue, d_maxValue);
00071 vmax = qwtMax(d_minValue, d_maxValue);
00072
00073 <span class="comment">// </span>
00074 <span class="comment">// Range check</span>
00075 <span class="comment">//</span>
00076 <span class="keywordflow">if</span> (x < vmin)
00077 {
00078 <span class="keywordflow">if</span> ((d_periodic) && (vmin != vmax))
00079 d_value = x + ceil( (vmin - x) / (vmax - vmin ) )
00080 * (vmax - vmin);
00081 <span class="keywordflow">else</span>
00082 d_value = vmin;
00083 }
00084 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (x > vmax)
00085 {
00086 <span class="keywordflow">if</span> ((d_periodic) && (vmin != vmax))
00087 d_value = x - ceil( ( x - vmax) / (vmax - vmin ))
00088 * (vmax - vmin);
00089 <span class="keywordflow">else</span>
00090 d_value = vmax;
00091 }
00092 <span class="keywordflow">else</span>
00093 d_value = x;
00094
00095 d_exactPrevValue = d_exactValue;
00096 d_exactValue = d_value;
00097
00098 <span class="comment">// align to grid</span>
00099 <span class="keywordflow">if</span> (align)
00100 {
00101 <span class="keywordflow">if</span> (d_step != 0.0)
00102 d_value = d_minValue +
00103 floor ((d_value - d_minValue) / d_step + 0.5) * d_step;
00104 <span class="keywordflow">else</span>
00105 d_value = d_minValue;
00106
00107 <span class="comment">// correct rounding error at the border</span>
00108 <span class="keywordflow">if</span> (fabs(d_value - d_maxValue) < MinEps * qwtAbs(d_step))
00109 d_value = d_maxValue;
00110
00111 <span class="comment">// correct rounding error if value = 0</span>
00112 <span class="keywordflow">if</span> (fabs(d_value) < MinEps * qwtAbs(d_step))
00113 d_value = 0.0;
00114 }
00115
00116 <span class="keywordflow">if</span> (!d_isValid || d_prevValue != d_value)
00117 {
00118 d_isValid = TRUE;
00119 <a class="code" href="class_qwt_dbl_range.html#b3">valueChange</a>();
00120 }
00121 }
00122
<a name="l00132"></a><a class="code" href="class_qwt_dbl_range.html#a16">00132</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#a16">QwtDblRange::fitValue</a>(<span class="keywordtype">double</span> x)
00133 {
00134 setNewValue(x,1);
00135 }
00136
00137
<a name="l00147"></a><a class="code" href="class_qwt_dbl_range.html#a5">00147</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#a5">QwtDblRange::setValue</a>(<span class="keywordtype">double</span> x)
00148 {
00149 setNewValue(x,0);
00150 }
00151
<a name="l00169"></a><a class="code" href="class_qwt_dbl_range.html#a2">00169</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#a2">QwtDblRange::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)
00170 {
00171 <span class="keywordtype">int</span> rchg = ((d_maxValue != vmax) || (d_minValue != vmin));
00172
00173 <span class="keywordflow">if</span> (rchg)
00174 {
00175 d_minValue = vmin;
00176 d_maxValue = vmax;
00177 }
00178
00179 <span class="comment">//</span>
00180 <span class="comment">// look if the step width has an acceptable </span>
00181 <span class="comment">// value or otherwise change it.</span>
00182 <span class="comment">//</span>
00183 <a class="code" href="class_qwt_dbl_range.html#a9">setStep</a>(vstep);
00184
00185 <span class="comment">//</span>
00186 <span class="comment">// limit page size</span>
00187 <span class="comment">//</span>
00188 d_pageSize = <a class="code" href="qwt__math_8h.html#a37">qwtLim</a>(pageSize,0,
00189 <span class="keywordtype">int</span>(qwtAbs((d_maxValue - d_minValue) / d_step)));
00190
00191 <span class="comment">// </span>
00192 <span class="comment">// If the value lies out of the range, it </span>
00193 <span class="comment">// will be changed. Note that it will not be adjusted to </span>
00194 <span class="comment">// the new step width.</span>
00195 setNewValue(d_value,0);
00196
00197 <span class="comment">// call notifier after the step width has been </span>
00198 <span class="comment">// adjusted.</span>
00199 <span class="keywordflow">if</span> (rchg)
00200 <a class="code" href="class_qwt_dbl_range.html#b5">rangeChange</a>();
00201 }
00202
<a name="l00208"></a><a class="code" href="class_qwt_dbl_range.html#a9">00208</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#a9">QwtDblRange::setStep</a>(<span class="keywordtype">double</span> vstep)
00209 {
00210 <span class="keywordtype">double</span> intv = d_maxValue - d_minValue;
00211
00212 <span class="keywordtype">double</span> newStep;
00213 <span class="keywordflow">if</span> (vstep == 0.0)
00214 newStep = intv * DefaultRelStep;
00215 <span class="keywordflow">else</span>
00216 {
00217 <span class="keywordflow">if</span> ((intv > 0) && (vstep < 0) || (intv < 0) && (vstep > 0))
00218 newStep = -vstep;
00219 <span class="keywordflow">else</span>
00220 newStep = vstep;
00221
00222 <span class="keywordflow">if</span> ( fabs(newStep) < fabs(MinRelStep * intv) )
00223 newStep = MinRelStep * intv;
00224 }
00225
00226 <span class="keywordflow">if</span> (newStep != d_step)
00227 {
00228 d_step = newStep;
00229 <a class="code" href="class_qwt_dbl_range.html#b4">stepChange</a>();
00230 }
00231 }
00232
00233
<a name="l00248"></a><a class="code" href="class_qwt_dbl_range.html#a7">00248</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#a7">QwtDblRange::setPeriodic</a>(<span class="keywordtype">bool</span> tf)
00249 {
00250 d_periodic = tf;
00251 }
00252
<a name="l00259"></a><a class="code" href="class_qwt_dbl_range.html#a14">00259</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#a14">QwtDblRange::incValue</a>(<span class="keywordtype">int</span> nSteps)
00260 {
00261 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dbl_range.html#a4">isValid</a>() )
00262 setNewValue(d_value + <span class="keywordtype">double</span>(nSteps) * d_step,1);
00263 }
00264
<a name="l00271"></a><a class="code" href="class_qwt_dbl_range.html#a15">00271</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#a15">QwtDblRange::incPages</a>(<span class="keywordtype">int</span> nPages)
00272 {
00273 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dbl_range.html#a4">isValid</a>() )
00274 setNewValue(d_value + <span class="keywordtype">double</span>(nPages) * <span class="keywordtype">double</span>(d_pageSize) * d_step,1);
00275 }
00276
<a name="l00283"></a><a class="code" href="class_qwt_dbl_range.html#b3">00283</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#b3">QwtDblRange::valueChange</a>()
00284 {
00285 }
00286
00287
<a name="l00294"></a><a class="code" href="class_qwt_dbl_range.html#b5">00294</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#b5">QwtDblRange::rangeChange</a>()
00295 {
00296 }
00297
00298
<a name="l00305"></a><a class="code" href="class_qwt_dbl_range.html#b4">00305</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dbl_range.html#b4">QwtDblRange::stepChange</a>()
00306 {
00307 }
00308
<a name="l00313"></a><a class="code" href="class_qwt_dbl_range.html#a10">00313</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_dbl_range.html#a10">QwtDblRange::step</a>()<span class="keyword"> const</span>
00314 <span class="keyword"></span>{
00315 <span class="keywordflow">return</span> qwtAbs(d_step);
00316 }
00317
<a name="l00326"></a><a class="code" href="class_qwt_dbl_range.html#a11">00326</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_dbl_range.html#a11">QwtDblRange::maxValue</a>()<span class="keyword"> const</span>
00327 <span class="keyword"></span>{
00328 <span class="keywordflow">return</span> d_maxValue;
00329 }
00330
<a name="l00339"></a><a class="code" href="class_qwt_dbl_range.html#a12">00339</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_dbl_range.html#a12">QwtDblRange::minValue</a>()<span class="keyword"> const </span>
00340 <span class="keyword"></span>{
00341 <span class="keywordflow">return</span> d_minValue;
00342 }
00343
<a name="l00348"></a><a class="code" href="class_qwt_dbl_range.html#a8">00348</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_dbl_range.html#a8">QwtDblRange::periodic</a>()<span class="keyword"> const </span>
00349 <span class="keyword"></span>{
00350 <span class="keywordflow">return</span> d_periodic;
00351 }
00352
<a name="l00354"></a><a class="code" href="class_qwt_dbl_range.html#a13">00354</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_dbl_range.html#a13">QwtDblRange::pageSize</a>()<span class="keyword"> const </span>
00355 <span class="keyword"></span>{
00356 <span class="keywordflow">return</span> d_pageSize;
00357 }
00358
<a name="l00360"></a><a class="code" href="class_qwt_dbl_range.html#a6">00360</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_dbl_range.html#a6">QwtDblRange::value</a>()<span class="keyword"> const </span>
00361 <span class="keyword"></span>{
00362 <span class="keywordflow">return</span> d_value;
00363 }
00364
<a name="l00374"></a><a class="code" href="class_qwt_dbl_range.html#b0">00374</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_dbl_range.html#b0">QwtDblRange::exactValue</a>()<span class="keyword"> const </span>
00375 <span class="keyword"></span>{
00376 <span class="keywordflow">return</span> d_exactValue;
00377 }
00378
<a name="l00380"></a><a class="code" href="class_qwt_dbl_range.html#b1">00380</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_dbl_range.html#b1">QwtDblRange::exactPrevValue</a>()<span class="keyword"> const </span>
00381 <span class="keyword"></span>{
00382 <span class="keywordflow">return</span> d_exactPrevValue;
00383 }
00384
<a name="l00386"></a><a class="code" href="class_qwt_dbl_range.html#b2">00386</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_dbl_range.html#b2">QwtDblRange::prevValue</a>()<span class="keyword"> const </span>
00387 <span class="keyword"></span>{
00388 <span class="keywordflow">return</span> d_prevValue;
00389 }
</div></pre><hr size="1"><address style="align: right;"><small>Generated on Tue Nov 16 21:12:20 2004 for Qwt User's Guide by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0 ></a> 1.3.8 </small></address>
</body>
</html>
|
