source: trunk/src/gui/kernel/qwinnativepangesturerecognizer_win.cpp@ 603

Last change on this file since 603 was 561, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.6.1 sources.

  • Property svn:eol-style set to native
File size: 4.5 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtGui module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include "private/qwinnativepangesturerecognizer_win_p.h"
43
44#include "qevent.h"
45#include "qgraphicsitem.h"
46#include "qgesture.h"
47
48#include "private/qgesture_p.h"
49#include "private/qevent_p.h"
50#include "private/qapplication_p.h"
51#include "private/qwidget_p.h"
52
53QT_BEGIN_NAMESPACE
54
55#if !defined(QT_NO_NATIVE_GESTURES)
56
57QWinNativePanGestureRecognizer::QWinNativePanGestureRecognizer()
58{
59}
60
61QGesture *QWinNativePanGestureRecognizer::create(QObject *target)
62{
63 if (!target)
64 return new QPanGesture; // a special case
65 if (!target->isWidgetType())
66 return 0;
67 if (qobject_cast<QGraphicsObject *>(target))
68 return 0;
69
70 QWidget *q = static_cast<QWidget *>(target);
71 QWidgetPrivate *d = q->d_func();
72 d->nativeGesturePanEnabled = true;
73 d->winSetupGestures();
74
75 return new QPanGesture;
76}
77
78QGestureRecognizer::Result QWinNativePanGestureRecognizer::recognize(QGesture *state,
79 QObject *,
80 QEvent *event)
81{
82 QPanGesture *q = static_cast<QPanGesture*>(state);
83 QPanGesturePrivate *d = q->d_func();
84
85 QGestureRecognizer::Result result = QGestureRecognizer::Ignore;
86 if (event->type() == QEvent::NativeGesture) {
87 QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
88 switch(ev->gestureType) {
89 case QNativeGestureEvent::GestureBegin:
90 break;
91 case QNativeGestureEvent::Pan:
92 result = QGestureRecognizer::TriggerGesture;
93 event->accept();
94 break;
95 case QNativeGestureEvent::GestureEnd:
96 if (q->state() == Qt::NoGesture)
97 return QGestureRecognizer::Ignore; // some other gesture has ended
98 result = QGestureRecognizer::FinishGesture;
99 break;
100 default:
101 return QGestureRecognizer::Ignore;
102 }
103 if (q->state() == Qt::NoGesture) {
104 d->lastOffset = d->offset = QPointF();
105 d->startPosition = ev->position;
106 } else {
107 d->lastOffset = d->offset;
108 d->offset = QPointF(ev->position.x() - d->startPosition.x(),
109 ev->position.y() - d->startPosition.y());
110 }
111 }
112 return result;
113}
114
115void QWinNativePanGestureRecognizer::reset(QGesture *state)
116{
117 QPanGesture *pan = static_cast<QPanGesture*>(state);
118 QPanGesturePrivate *d = pan->d_func();
119
120 d->lastOffset = d->offset = QPointF();
121 d->startPosition = QPoint();
122 d->acceleration = 0;
123
124 QGestureRecognizer::reset(state);
125}
126
127#endif // QT_NO_NATIVE_GESTURES
128
129QT_END_NAMESPACE
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