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
|
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "mousepangesturerecognizer.h"
#include <QEvent>
#include <QVariant>
#include <QGraphicsSceneMouseEvent>
#include <QMouseEvent>
#include <QGesture>
MousePanGestureRecognizer::MousePanGestureRecognizer()
{
}
QGesture* MousePanGestureRecognizer::create(QObject *)
{
return new QPanGesture;
}
QGestureRecognizer::Result MousePanGestureRecognizer::recognize(QGesture *state, QObject *, QEvent *event)
{
QPanGesture *g = static_cast<QPanGesture *>(state);
QPoint globalPos;
switch (event->type()) {
case QEvent::GraphicsSceneMousePress:
case QEvent::GraphicsSceneMouseDoubleClick:
case QEvent::GraphicsSceneMouseMove:
case QEvent::GraphicsSceneMouseRelease:
globalPos = static_cast<QGraphicsSceneMouseEvent *>(event)->screenPos();
break;
case QEvent::MouseButtonPress:
case QEvent::MouseMove:
case QEvent::MouseButtonRelease:
globalPos = static_cast<QMouseEvent *>(event)->globalPos();
break;
default:
break;
}
if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonDblClick
|| event->type() == QEvent::GraphicsSceneMousePress || event->type() == QEvent::GraphicsSceneMouseDoubleClick) {
g->setHotSpot(globalPos);
g->setProperty("startPos", globalPos);
g->setProperty("pressed", QVariant::fromValue<bool>(true));
return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
} else if (event->type() == QEvent::MouseMove || event->type() == QEvent::GraphicsSceneMouseMove) {
if (g->property("pressed").toBool()) {
QPoint offset = globalPos - g->property("startPos").toPoint();
g->setLastOffset(g->offset());
g->setOffset(QPointF(offset.x(), offset.y()));
return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
}
return QGestureRecognizer::CancelGesture;
} else if (event->type() == QEvent::MouseButtonRelease || event->type() == QEvent::GraphicsSceneMouseRelease) {
return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
}
return QGestureRecognizer::Ignore;
}
void MousePanGestureRecognizer::reset(QGesture *state)
{
QPanGesture *g = static_cast<QPanGesture *>(state);
g->setLastOffset(QPointF());
g->setOffset(QPointF());
g->setAcceleration(0);
g->setProperty("startPos", QVariant());
g->setProperty("pressed", QVariant::fromValue<bool>(false));
QGestureRecognizer::reset(state);
}
|
