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<h1>qwt_magnifier.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="comment">// vim: expandtab</span>
30
<a name="l00011"></a>00011
31
<a name="l00012"></a>00012 <span class="preprocessor">#include <math.h></span>
32
<a name="l00013"></a>00013 <span class="preprocessor">#include <qevent.h></span>
33
<a name="l00014"></a>00014 <span class="preprocessor">#include <qwidget.h></span>
34
<a name="l00015"></a>00015 <span class="preprocessor">#include "qwt_math.h"</span>
35
<a name="l00016"></a>00016 <span class="preprocessor">#include "qwt_magnifier.h"</span>
36
<a name="l00017"></a>00017
37
<a name="l00018"></a>00018 <span class="keyword">class </span>QwtMagnifier::PrivateData
38
<a name="l00019"></a>00019 {
39
<a name="l00020"></a>00020 <span class="keyword">public</span>:
40
<a name="l00021"></a>00021 PrivateData():
41
<a name="l00022"></a>00022 <a class="code" href="class_qwt_magnifier.html#64f88257b2432d21f5fc62e7fd9c0fde">isEnabled</a>(false),
42
<a name="l00023"></a>00023 <a class="code" href="class_qwt_magnifier.html#9bf2df5d0a0087e967c8674618466da2">wheelFactor</a>(0.9),
43
<a name="l00024"></a>00024 <a class="code" href="class_qwt_magnifier.html#ff0975058a120f4258f799d67331f972">wheelButtonState</a>(Qt::NoButton),
44
<a name="l00025"></a>00025 <a class="code" href="class_qwt_magnifier.html#282d3c040136ad97586ac73c37151508">mouseFactor</a>(0.95),
45
<a name="l00026"></a>00026 mouseButton(Qt::RightButton),
46
<a name="l00027"></a>00027 mouseButtonState(Qt::NoButton),
47
<a name="l00028"></a>00028 <a class="code" href="class_qwt_magnifier.html#e29e88684303d3bf587e9b5338267111">keyFactor</a>(0.9),
48
<a name="l00029"></a>00029 zoomInKey(Qt::Key_Plus),
49
<a name="l00030"></a>00030 zoomOutKey(Qt::Key_Minus),
50
<a name="l00031"></a>00031 #if QT_VERSION < 0x040000
51
<a name="l00032"></a>00032 zoomInKeyModifiers(Qt::NoButton),
52
<a name="l00033"></a>00033 zoomOutKeyModifiers(Qt::NoButton),
53
<a name="l00034"></a>00034 #else
54
<a name="l00035"></a>00035 zoomInKeyModifiers(Qt::NoModifier),
55
<a name="l00036"></a>00036 zoomOutKeyModifiers(Qt::NoModifier),
56
<a name="l00037"></a>00037 #endif
57
<a name="l00038"></a>00038 mousePressed(false)
58
<a name="l00039"></a>00039 {
59
<a name="l00040"></a>00040 }
60
<a name="l00041"></a>00041
61
<a name="l00042"></a>00042 <span class="keywordtype">bool</span> <a class="code" href="class_qwt_magnifier.html#64f88257b2432d21f5fc62e7fd9c0fde">isEnabled</a>;
62
<a name="l00043"></a>00043
63
<a name="l00044"></a>00044 <span class="keywordtype">double</span> <a class="code" href="class_qwt_magnifier.html#9bf2df5d0a0087e967c8674618466da2">wheelFactor</a>;
64
<a name="l00045"></a>00045 <span class="keywordtype">int</span> <a class="code" href="class_qwt_magnifier.html#ff0975058a120f4258f799d67331f972">wheelButtonState</a>;
65
<a name="l00046"></a>00046
66
<a name="l00047"></a>00047 <span class="keywordtype">double</span> <a class="code" href="class_qwt_magnifier.html#282d3c040136ad97586ac73c37151508">mouseFactor</a>;
67
<a name="l00048"></a>00048 <span class="keywordtype">int</span> mouseButton;
68
<a name="l00049"></a>00049 <span class="keywordtype">int</span> mouseButtonState;
69
<a name="l00050"></a>00050
70
<a name="l00051"></a>00051 <span class="keywordtype">double</span> <a class="code" href="class_qwt_magnifier.html#e29e88684303d3bf587e9b5338267111">keyFactor</a>;
71
<a name="l00052"></a>00052 <span class="keywordtype">int</span> zoomInKey;
72
<a name="l00053"></a>00053 <span class="keywordtype">int</span> zoomOutKey;
73
<a name="l00054"></a>00054 <span class="keywordtype">int</span> zoomInKeyModifiers;
74
<a name="l00055"></a>00055 <span class="keywordtype">int</span> zoomOutKeyModifiers;
75
<a name="l00056"></a>00056
76
<a name="l00057"></a>00057 <span class="keywordtype">bool</span> mousePressed;
77
<a name="l00058"></a>00058 <span class="keywordtype">bool</span> hasMouseTracking;
78
<a name="l00059"></a>00059 QPoint mousePos;
79
<a name="l00060"></a>00060 };
80
<a name="l00061"></a>00061
81
<a name="l00066"></a><a class="code" href="class_qwt_magnifier.html#a11b927c72e0421570a137f0fa1cfb7b">00066</a> <a class="code" href="class_qwt_magnifier.html#a11b927c72e0421570a137f0fa1cfb7b">QwtMagnifier::QwtMagnifier</a>(QWidget *parent):
82
<a name="l00067"></a>00067 QObject(parent)
83
<a name="l00068"></a>00068 {
84
<a name="l00069"></a>00069 d_data = <span class="keyword">new</span> PrivateData();
85
<a name="l00070"></a>00070 <a class="code" href="class_qwt_magnifier.html#03d892c58039fc864a452b7c636a1df7">setEnabled</a>(<span class="keyword">true</span>);
86
<a name="l00071"></a>00071 }
87
<a name="l00072"></a>00072
88
<a name="l00074"></a><a class="code" href="class_qwt_magnifier.html#c18a7858407951a335399ee6969a50da">00074</a> <a class="code" href="class_qwt_magnifier.html#c18a7858407951a335399ee6969a50da">QwtMagnifier::~QwtMagnifier</a>()
89
<a name="l00075"></a>00075 {
90
<a name="l00076"></a>00076 <span class="keyword">delete</span> d_data;
91
<a name="l00077"></a>00077 }
92
<a name="l00078"></a>00078
93
<a name="l00088"></a><a class="code" href="class_qwt_magnifier.html#03d892c58039fc864a452b7c636a1df7">00088</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#03d892c58039fc864a452b7c636a1df7">QwtMagnifier::setEnabled</a>(<span class="keywordtype">bool</span> on)
94
<a name="l00089"></a>00089 {
95
<a name="l00090"></a>00090 <span class="keywordflow">if</span> ( d_data->isEnabled != on )
96
<a name="l00091"></a>00091 {
97
<a name="l00092"></a>00092 d_data->isEnabled = on;
98
<a name="l00093"></a>00093
99
<a name="l00094"></a>00094 QObject *o = parent();
100
<a name="l00095"></a>00095 <span class="keywordflow">if</span> ( o )
101
<a name="l00096"></a>00096 {
102
<a name="l00097"></a>00097 <span class="keywordflow">if</span> ( d_data->isEnabled )
103
<a name="l00098"></a>00098 o->installEventFilter(<span class="keyword">this</span>);
104
<a name="l00099"></a>00099 <span class="keywordflow">else</span>
105
<a name="l00100"></a>00100 o->removeEventFilter(<span class="keyword">this</span>);
106
<a name="l00101"></a>00101 }
107
<a name="l00102"></a>00102 }
108
<a name="l00103"></a>00103 }
109
<a name="l00104"></a>00104
110
<a name="l00109"></a><a class="code" href="class_qwt_magnifier.html#64f88257b2432d21f5fc62e7fd9c0fde">00109</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_magnifier.html#64f88257b2432d21f5fc62e7fd9c0fde">QwtMagnifier::isEnabled</a>()<span class="keyword"> const</span>
111
<a name="l00110"></a>00110 <span class="keyword"></span>{
112
<a name="l00111"></a>00111 <span class="keywordflow">return</span> d_data->isEnabled;
113
<a name="l00112"></a>00112 }
114
<a name="l00113"></a>00113
115
<a name="l00125"></a><a class="code" href="class_qwt_magnifier.html#e3a33ab8776ed2122fecc821a32bb36a">00125</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#e3a33ab8776ed2122fecc821a32bb36a">QwtMagnifier::setWheelFactor</a>(<span class="keywordtype">double</span> factor)
116
<a name="l00126"></a>00126 {
117
<a name="l00127"></a>00127 d_data->wheelFactor = factor;
118
<a name="l00128"></a>00128 }
119
<a name="l00129"></a>00129
120
<a name="l00134"></a><a class="code" href="class_qwt_magnifier.html#9bf2df5d0a0087e967c8674618466da2">00134</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_magnifier.html#9bf2df5d0a0087e967c8674618466da2">QwtMagnifier::wheelFactor</a>()<span class="keyword"> const</span>
121
<a name="l00135"></a>00135 <span class="keyword"></span>{
122
<a name="l00136"></a>00136 <span class="keywordflow">return</span> d_data->wheelFactor;
123
<a name="l00137"></a>00137 }
124
<a name="l00138"></a>00138
125
<a name="l00146"></a><a class="code" href="class_qwt_magnifier.html#36270c611c465f11f3ade46f3b3bb74a">00146</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#36270c611c465f11f3ade46f3b3bb74a">QwtMagnifier::setWheelButtonState</a>(<span class="keywordtype">int</span> buttonState)
126
<a name="l00147"></a>00147 {
127
<a name="l00148"></a>00148 d_data->wheelButtonState = buttonState;
128
<a name="l00149"></a>00149 }
129
<a name="l00150"></a>00150
130
<a name="l00155"></a><a class="code" href="class_qwt_magnifier.html#ff0975058a120f4258f799d67331f972">00155</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_magnifier.html#ff0975058a120f4258f799d67331f972">QwtMagnifier::wheelButtonState</a>()<span class="keyword"> const</span>
131
<a name="l00156"></a>00156 <span class="keyword"></span>{
132
<a name="l00157"></a>00157 <span class="keywordflow">return</span> d_data->wheelButtonState;
133
<a name="l00158"></a>00158 }
134
<a name="l00159"></a>00159
135
<a name="l00170"></a><a class="code" href="class_qwt_magnifier.html#da5dac479dc1e69c04760bb7dc197ac9">00170</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#da5dac479dc1e69c04760bb7dc197ac9">QwtMagnifier::setMouseFactor</a>(<span class="keywordtype">double</span> factor)
136
<a name="l00171"></a>00171 {
137
<a name="l00172"></a>00172 d_data->mouseFactor = factor;
138
<a name="l00173"></a>00173 }
139
<a name="l00174"></a>00174
140
<a name="l00179"></a><a class="code" href="class_qwt_magnifier.html#282d3c040136ad97586ac73c37151508">00179</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_magnifier.html#282d3c040136ad97586ac73c37151508">QwtMagnifier::mouseFactor</a>()<span class="keyword"> const</span>
141
<a name="l00180"></a>00180 <span class="keyword"></span>{
142
<a name="l00181"></a>00181 <span class="keywordflow">return</span> d_data->mouseFactor;
143
<a name="l00182"></a>00182 }
144
<a name="l00183"></a>00183
145
<a name="l00192"></a><a class="code" href="class_qwt_magnifier.html#345e4f61d48274f73f6e39fdcaea6745">00192</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#345e4f61d48274f73f6e39fdcaea6745">QwtMagnifier::setMouseButton</a>(<span class="keywordtype">int</span> button, <span class="keywordtype">int</span> buttonState)
146
<a name="l00193"></a>00193 {
147
<a name="l00194"></a>00194 d_data->mouseButton = button;
148
<a name="l00195"></a>00195 d_data->mouseButtonState = buttonState;
149
<a name="l00196"></a>00196 }
150
<a name="l00197"></a>00197
151
<a name="l00199"></a><a class="code" href="class_qwt_magnifier.html#3bf315d2740542648b2aed56ade85705">00199</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#3bf315d2740542648b2aed56ade85705">QwtMagnifier::getMouseButton</a>(
152
<a name="l00200"></a>00200 <span class="keywordtype">int</span> &button, <span class="keywordtype">int</span> &buttonState)<span class="keyword"> const</span>
153
<a name="l00201"></a>00201 <span class="keyword"></span>{
154
<a name="l00202"></a>00202 button = d_data->mouseButton;
155
<a name="l00203"></a>00203 buttonState = d_data->mouseButtonState;
156
<a name="l00204"></a>00204 }
157
<a name="l00205"></a>00205
158
<a name="l00217"></a><a class="code" href="class_qwt_magnifier.html#c079b44e124fdaba1d894ef519bc4e4f">00217</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#c079b44e124fdaba1d894ef519bc4e4f">QwtMagnifier::setKeyFactor</a>(<span class="keywordtype">double</span> factor)
159
<a name="l00218"></a>00218 {
160
<a name="l00219"></a>00219 d_data->keyFactor = factor;
161
<a name="l00220"></a>00220 }
162
<a name="l00221"></a>00221
163
<a name="l00226"></a><a class="code" href="class_qwt_magnifier.html#e29e88684303d3bf587e9b5338267111">00226</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_magnifier.html#e29e88684303d3bf587e9b5338267111">QwtMagnifier::keyFactor</a>()<span class="keyword"> const</span>
164
<a name="l00227"></a>00227 <span class="keyword"></span>{
165
<a name="l00228"></a>00228 <span class="keywordflow">return</span> d_data->keyFactor;
166
<a name="l00229"></a>00229 }
167
<a name="l00230"></a>00230
168
<a name="l00239"></a><a class="code" href="class_qwt_magnifier.html#51691b6a49437467d140fc0687b68140">00239</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#51691b6a49437467d140fc0687b68140">QwtMagnifier::setZoomInKey</a>(<span class="keywordtype">int</span> key, <span class="keywordtype">int</span> modifiers)
169
<a name="l00240"></a>00240 {
170
<a name="l00241"></a>00241 d_data->zoomInKey = key;
171
<a name="l00242"></a>00242 d_data->zoomInKeyModifiers = modifiers;
172
<a name="l00243"></a>00243 }
173
<a name="l00244"></a>00244
174
<a name="l00246"></a><a class="code" href="class_qwt_magnifier.html#842220be6e7a3ad3755997ad1c06bc9f">00246</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#842220be6e7a3ad3755997ad1c06bc9f">QwtMagnifier::getZoomInKey</a>(<span class="keywordtype">int</span> &key, <span class="keywordtype">int</span> &modifiers)<span class="keyword"> const</span>
175
<a name="l00247"></a>00247 <span class="keyword"></span>{
176
<a name="l00248"></a>00248 key = d_data->zoomInKey;
177
<a name="l00249"></a>00249 modifiers = d_data->zoomInKeyModifiers;
178
<a name="l00250"></a>00250 }
179
<a name="l00251"></a>00251
180
<a name="l00260"></a><a class="code" href="class_qwt_magnifier.html#e265bcef7b3a1c59fc432c20fa407805">00260</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#e265bcef7b3a1c59fc432c20fa407805">QwtMagnifier::setZoomOutKey</a>(<span class="keywordtype">int</span> key, <span class="keywordtype">int</span> modifiers)
181
<a name="l00261"></a>00261 {
182
<a name="l00262"></a>00262 d_data->zoomOutKey = key;
183
<a name="l00263"></a>00263 d_data->zoomOutKeyModifiers = modifiers;
184
<a name="l00264"></a>00264 }
185
<a name="l00265"></a>00265
186
<a name="l00267"></a><a class="code" href="class_qwt_magnifier.html#05b45fab1bf074539bcb483fc2a1b517">00267</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#05b45fab1bf074539bcb483fc2a1b517">QwtMagnifier::getZoomOutKey</a>(<span class="keywordtype">int</span> &key, <span class="keywordtype">int</span> &modifiers)<span class="keyword"> const</span>
187
<a name="l00268"></a>00268 <span class="keyword"></span>{
188
<a name="l00269"></a>00269 key = d_data->zoomOutKey;
189
<a name="l00270"></a>00270 modifiers = d_data->zoomOutKeyModifiers;
190
<a name="l00271"></a>00271 }
191
<a name="l00272"></a>00272
192
<a name="l00282"></a><a class="code" href="class_qwt_magnifier.html#e7f4c0ad7631501cec17abe31695281f">00282</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_magnifier.html#e7f4c0ad7631501cec17abe31695281f">QwtMagnifier::eventFilter</a>(QObject *o, QEvent *e)
193
<a name="l00283"></a>00283 {
194
<a name="l00284"></a>00284 <span class="keywordflow">if</span> ( o && o == parent() )
195
<a name="l00285"></a>00285 {
196
<a name="l00286"></a>00286 <span class="keywordflow">switch</span>(e->type() )
197
<a name="l00287"></a>00287 {
198
<a name="l00288"></a>00288 <span class="keywordflow">case</span> QEvent::MouseButtonPress:
199
<a name="l00289"></a>00289 {
200
<a name="l00290"></a>00290 <a class="code" href="class_qwt_magnifier.html#5930b3ec00ae99883f36cf8bf568cbf7">widgetMousePressEvent</a>((QMouseEvent *)e);
201
<a name="l00291"></a>00291 <span class="keywordflow">break</span>;
202
<a name="l00292"></a>00292 }
203
<a name="l00293"></a>00293 <span class="keywordflow">case</span> QEvent::MouseMove:
204
<a name="l00294"></a>00294 {
205
<a name="l00295"></a>00295 <a class="code" href="class_qwt_magnifier.html#4eb68b98b063cc14b7839f02f8671dfc">widgetMouseMoveEvent</a>((QMouseEvent *)e);
206
<a name="l00296"></a>00296 <span class="keywordflow">break</span>;
207
<a name="l00297"></a>00297 }
208
<a name="l00298"></a>00298 <span class="keywordflow">case</span> QEvent::MouseButtonRelease:
209
<a name="l00299"></a>00299 {
210
<a name="l00300"></a>00300 <a class="code" href="class_qwt_magnifier.html#a7cc31995444ca8dd8412b8a6dab7b93">widgetMouseReleaseEvent</a>((QMouseEvent *)e);
211
<a name="l00301"></a>00301 <span class="keywordflow">break</span>;
212
<a name="l00302"></a>00302 }
213
<a name="l00303"></a>00303 <span class="keywordflow">case</span> QEvent::Wheel:
214
<a name="l00304"></a>00304 {
215
<a name="l00305"></a>00305 <a class="code" href="class_qwt_magnifier.html#236762870830cc0621411c173472392b">widgetWheelEvent</a>((QWheelEvent *)e);
216
<a name="l00306"></a>00306 <span class="keywordflow">break</span>;
217
<a name="l00307"></a>00307 }
218
<a name="l00308"></a>00308 <span class="keywordflow">case</span> QEvent::KeyPress:
219
<a name="l00309"></a>00309 {
220
<a name="l00310"></a>00310 <a class="code" href="class_qwt_magnifier.html#382cec084a2bfc0610ca500121205f04">widgetKeyPressEvent</a>((QKeyEvent *)e);
221
<a name="l00311"></a>00311 <span class="keywordflow">break</span>;
222
<a name="l00312"></a>00312 }
223
<a name="l00313"></a>00313 <span class="keywordflow">case</span> QEvent::KeyRelease:
224
<a name="l00314"></a>00314 {
225
<a name="l00315"></a>00315 <a class="code" href="class_qwt_magnifier.html#f84037c68c9b88263d1c27bb648cf9ff">widgetKeyReleaseEvent</a>((QKeyEvent *)e);
226
<a name="l00316"></a>00316 <span class="keywordflow">break</span>;
227
<a name="l00317"></a>00317 }
228
<a name="l00318"></a>00318 <span class="keywordflow">default</span>:;
229
<a name="l00319"></a>00319 }
230
<a name="l00320"></a>00320 }
231
<a name="l00321"></a>00321 <span class="keywordflow">return</span> QObject::eventFilter(o, e);
232
<a name="l00322"></a>00322 }
233
<a name="l00323"></a>00323
234
<a name="l00330"></a><a class="code" href="class_qwt_magnifier.html#5930b3ec00ae99883f36cf8bf568cbf7">00330</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#5930b3ec00ae99883f36cf8bf568cbf7">QwtMagnifier::widgetMousePressEvent</a>(QMouseEvent *me)
235
<a name="l00331"></a>00331 {
236
<a name="l00332"></a>00332 <span class="keywordflow">if</span> ( me->button() != d_data->mouseButton || <a class="code" href="class_qwt_magnifier.html#56b7ad2366a7f908c38bc2a994acde16">parentWidget</a>() == NULL )
237
<a name="l00333"></a>00333 <span class="keywordflow">return</span>;
238
<a name="l00334"></a>00334
239
<a name="l00335"></a>00335 <span class="preprocessor">#if QT_VERSION < 0x040000</span>
240
<a name="l00336"></a>00336 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( (me->state() & Qt::KeyButtonMask) !=
241
<a name="l00337"></a>00337 (d_data->mouseButtonState & Qt::KeyButtonMask) )
242
<a name="l00338"></a>00338 #<span class="keywordflow">else</span>
243
<a name="l00339"></a>00339 <span class="keywordflow">if</span> ( (me->modifiers() & Qt::KeyboardModifierMask) !=
244
<a name="l00340"></a>00340 (<span class="keywordtype">int</span>)(d_data->mouseButtonState & Qt::KeyboardModifierMask) )
245
<a name="l00341"></a>00341 <span class="preprocessor">#endif</span>
246
<a name="l00342"></a>00342 <span class="preprocessor"></span> {
247
<a name="l00343"></a>00343 <span class="keywordflow">return</span>;
248
<a name="l00344"></a>00344 }
249
<a name="l00345"></a>00345
250
<a name="l00346"></a>00346 d_data->hasMouseTracking = <a class="code" href="class_qwt_magnifier.html#56b7ad2366a7f908c38bc2a994acde16">parentWidget</a>()->hasMouseTracking();
251
<a name="l00347"></a>00347 <a class="code" href="class_qwt_magnifier.html#56b7ad2366a7f908c38bc2a994acde16">parentWidget</a>()->setMouseTracking(<span class="keyword">true</span>);
252
<a name="l00348"></a>00348 d_data->mousePos = me->pos();
253
<a name="l00349"></a>00349 d_data->mousePressed = <span class="keyword">true</span>;
254
<a name="l00350"></a>00350 }
255
<a name="l00351"></a>00351
256
<a name="l00356"></a><a class="code" href="class_qwt_magnifier.html#a7cc31995444ca8dd8412b8a6dab7b93">00356</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#a7cc31995444ca8dd8412b8a6dab7b93">QwtMagnifier::widgetMouseReleaseEvent</a>(QMouseEvent *)
257
<a name="l00357"></a>00357 {
258
<a name="l00358"></a>00358 <span class="keywordflow">if</span> ( d_data->mousePressed && <a class="code" href="class_qwt_magnifier.html#56b7ad2366a7f908c38bc2a994acde16">parentWidget</a>() )
259
<a name="l00359"></a>00359 {
260
<a name="l00360"></a>00360 d_data->mousePressed = <span class="keyword">false</span>;
261
<a name="l00361"></a>00361 <a class="code" href="class_qwt_magnifier.html#56b7ad2366a7f908c38bc2a994acde16">parentWidget</a>()->setMouseTracking(d_data->hasMouseTracking);
262
<a name="l00362"></a>00362 }
263
<a name="l00363"></a>00363 }
264
<a name="l00364"></a>00364
265
<a name="l00371"></a><a class="code" href="class_qwt_magnifier.html#4eb68b98b063cc14b7839f02f8671dfc">00371</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#4eb68b98b063cc14b7839f02f8671dfc">QwtMagnifier::widgetMouseMoveEvent</a>(QMouseEvent *me)
266
<a name="l00372"></a>00372 {
267
<a name="l00373"></a>00373 <span class="keywordflow">if</span> ( !d_data->mousePressed )
268
<a name="l00374"></a>00374 <span class="keywordflow">return</span>;
269
<a name="l00375"></a>00375
270
<a name="l00376"></a>00376 <span class="keyword">const</span> <span class="keywordtype">int</span> dy = me->pos().y() - d_data->mousePos.y();
271
<a name="l00377"></a>00377 <span class="keywordflow">if</span> ( dy != 0 )
272
<a name="l00378"></a>00378 {
273
<a name="l00379"></a>00379 <span class="keywordtype">double</span> f = d_data->mouseFactor;
274
<a name="l00380"></a>00380 <span class="keywordflow">if</span> ( dy < 0 )
275
<a name="l00381"></a>00381 f = 1 / f;
276
<a name="l00382"></a>00382
277
<a name="l00383"></a>00383 rescale(f);
278
<a name="l00384"></a>00384 }
279
<a name="l00385"></a>00385
280
<a name="l00386"></a>00386 d_data->mousePos = me->pos();
281
<a name="l00387"></a>00387 }
282
<a name="l00388"></a>00388
283
<a name="l00395"></a><a class="code" href="class_qwt_magnifier.html#236762870830cc0621411c173472392b">00395</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#236762870830cc0621411c173472392b">QwtMagnifier::widgetWheelEvent</a>(QWheelEvent *we)
284
<a name="l00396"></a>00396 {
285
<a name="l00397"></a>00397 <span class="preprocessor">#if QT_VERSION < 0x040000</span>
286
<a name="l00398"></a>00398 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( (we->state() & Qt::KeyButtonMask) !=
287
<a name="l00399"></a>00399 (d_data->wheelButtonState & Qt::KeyButtonMask) )
288
<a name="l00400"></a>00400 #<span class="keywordflow">else</span>
289
<a name="l00401"></a>00401 <span class="keywordflow">if</span> ( (we->modifiers() & Qt::KeyboardModifierMask) !=
290
<a name="l00402"></a>00402 (<span class="keywordtype">int</span>)(d_data->wheelButtonState & Qt::KeyboardModifierMask) )
291
<a name="l00403"></a>00403 <span class="preprocessor">#endif</span>
292
<a name="l00404"></a>00404 <span class="preprocessor"></span> {
293
<a name="l00405"></a>00405 <span class="keywordflow">return</span>;
294
<a name="l00406"></a>00406 }
295
<a name="l00407"></a>00407
296
<a name="l00408"></a>00408 <span class="keywordflow">if</span> ( d_data->wheelFactor != 0.0 )
297
<a name="l00409"></a>00409 {
298
<a name="l00410"></a>00410 <span class="comment">/*</span>
299
<a name="l00411"></a>00411 <span class="comment"> A positive delta indicates that the wheel was </span>
300
<a name="l00412"></a>00412 <span class="comment"> rotated forwards away from the user; a negative </span>
301
<a name="l00413"></a>00413 <span class="comment"> value indicates that the wheel was rotated </span>
302
<a name="l00414"></a>00414 <span class="comment"> backwards toward the user.</span>
303
<a name="l00415"></a>00415 <span class="comment"> Most mouse types work in steps of 15 degrees, </span>
304
<a name="l00416"></a>00416 <span class="comment"> in which case the delta value is a multiple </span>
305
<a name="l00417"></a>00417 <span class="comment"> of 120 (== 15 * 8).</span>
306
<a name="l00418"></a>00418 <span class="comment"> */</span>
307
<a name="l00419"></a>00419 <span class="keywordtype">double</span> f = ::pow(d_data->wheelFactor,
308
<a name="l00420"></a>00420 qwtAbs(we->delta() / 120));
309
<a name="l00421"></a>00421 <span class="keywordflow">if</span> ( we->delta() > 0 )
310
<a name="l00422"></a>00422 f = 1 / f;
311
<a name="l00423"></a>00423
312
<a name="l00424"></a>00424 rescale(f);
313
<a name="l00425"></a>00425 }
314
<a name="l00426"></a>00426 }
315
<a name="l00427"></a>00427
316
<a name="l00434"></a><a class="code" href="class_qwt_magnifier.html#382cec084a2bfc0610ca500121205f04">00434</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#382cec084a2bfc0610ca500121205f04">QwtMagnifier::widgetKeyPressEvent</a>(QKeyEvent *ke)
317
<a name="l00435"></a>00435 {
318
<a name="l00436"></a>00436 <span class="keyword">const</span> <span class="keywordtype">int</span> key = ke->key();
319
<a name="l00437"></a>00437 <span class="preprocessor">#if QT_VERSION < 0x040000</span>
320
<a name="l00438"></a>00438 <span class="preprocessor"></span> <span class="keyword">const</span> <span class="keywordtype">int</span> state = ke->state();
321
<a name="l00439"></a>00439 <span class="preprocessor">#else</span>
322
<a name="l00440"></a>00440 <span class="preprocessor"></span> <span class="keyword">const</span> <span class="keywordtype">int</span> state = ke->modifiers();
323
<a name="l00441"></a>00441 <span class="preprocessor">#endif</span>
324
<a name="l00442"></a>00442 <span class="preprocessor"></span>
325
<a name="l00443"></a>00443 <span class="keywordflow">if</span> ( key == d_data->zoomInKey &&
326
<a name="l00444"></a>00444 state == d_data->zoomInKeyModifiers )
327
<a name="l00445"></a>00445 {
328
<a name="l00446"></a>00446 rescale(d_data->keyFactor);
329
<a name="l00447"></a>00447 }
330
<a name="l00448"></a>00448 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( key == d_data->zoomOutKey &&
331
<a name="l00449"></a>00449 state == d_data->zoomOutKeyModifiers )
332
<a name="l00450"></a>00450 {
333
<a name="l00451"></a>00451 rescale(1.0 / d_data->keyFactor);
334
<a name="l00452"></a>00452 }
335
<a name="l00453"></a>00453 }
336
<a name="l00454"></a>00454
337
<a name="l00461"></a><a class="code" href="class_qwt_magnifier.html#f84037c68c9b88263d1c27bb648cf9ff">00461</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_magnifier.html#f84037c68c9b88263d1c27bb648cf9ff">QwtMagnifier::widgetKeyReleaseEvent</a>(QKeyEvent *)
338
<a name="l00462"></a>00462 {
339
<a name="l00463"></a>00463 }
340
<a name="l00464"></a>00464
341
<a name="l00465"></a><a class="code" href="class_qwt_magnifier.html#56b7ad2366a7f908c38bc2a994acde16">00465</a> QWidget *<a class="code" href="class_qwt_magnifier.html#56b7ad2366a7f908c38bc2a994acde16">QwtMagnifier::parentWidget</a>()
342
<a name="l00466"></a>00466 {
343
<a name="l00467"></a>00467 <span class="keywordflow">if</span> ( parent()->inherits(<span class="stringliteral">"QWidget"</span>) )
344
<a name="l00468"></a>00468 <span class="keywordflow">return</span> (QWidget *)parent();
345
<a name="l00469"></a>00469
346
<a name="l00470"></a>00470 <span class="keywordflow">return</span> NULL;
347
<a name="l00471"></a>00471 }
348
<a name="l00472"></a>00472
349
<a name="l00473"></a><a class="code" href="class_qwt_magnifier.html#cbb443e8e38f049b937a8b00fcf05869">00473</a> <span class="keyword">const</span> QWidget *<a class="code" href="class_qwt_magnifier.html#56b7ad2366a7f908c38bc2a994acde16">QwtMagnifier::parentWidget</a>()<span class="keyword"> const</span>
350
<a name="l00474"></a>00474 <span class="keyword"></span>{
351
<a name="l00475"></a>00475 <span class="keywordflow">if</span> ( parent()->inherits(<span class="stringliteral">"QWidget"</span>) )
352
<a name="l00476"></a>00476 <span class="keywordflow">return</span> (<span class="keyword">const</span> QWidget *)parent();
353
<a name="l00477"></a>00477
354
<a name="l00478"></a>00478 <span class="keywordflow">return</span> NULL;
355
<a name="l00479"></a>00479 }
356
<a name="l00480"></a>00480
357
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Mar 22 16:54:07 2009 for Qwt User's Guide by
358
<a href="http://www.doxygen.org/index.html">
359
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.0 </small></address>