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
|
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qmlstate_p.h"
#include "qmlstategroup_p.h"
#include "qmlstate_p_p.h"
#include "qmlstateoperations_p.h"
#include "qmlanimation_p.h"
#include "qmlanimation_p_p.h"
#include "qmltransitionmanager_p_p.h"
#include <QParallelAnimationGroup>
QT_BEGIN_NAMESPACE
/*!
\qmlclass Transition QmlTransition
\brief The Transition element defines animated transitions that occur on state changes.
\sa {qmlstates}{States}, {state-transitions}{Transitions}
*/
/*!
\internal
\class QmlTransition
\brief The QmlTransition class allows you to define animated transitions that occur on state changes.
\ingroup group_states
*/
//ParallelAnimationWrapperallows us to do a "callback" when the animation finishes, rather than connecting
//and disconnecting signals and slots frequently
class ParallelAnimationWrapper : public QParallelAnimationGroup
{
Q_OBJECT
public:
ParallelAnimationWrapper(QObject *parent = 0) : QParallelAnimationGroup(parent) {}
QmlTransitionPrivate *trans;
protected:
virtual void updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState);
};
class QmlTransitionPrivate : public QObjectPrivate
{
Q_DECLARE_PUBLIC(QmlTransition)
public:
QmlTransitionPrivate() : fromState(QLatin1String("*")), toState(QLatin1String("*"))
, reversed(false), reversible(false), endState(0)
{
animations.parent = this;
group.trans = this;
}
QString fromState;
QString toState;
bool reversed;
bool reversible;
ParallelAnimationWrapper group;
QmlTransitionManager *endState;
void complete()
{
endState->complete();
}
class AnimationList : public QmlConcreteList<QmlAbstractAnimation *>
{
public:
AnimationList() : parent(0) {}
virtual void append(QmlAbstractAnimation *a);
virtual void clear() { QmlConcreteList<QmlAbstractAnimation *>::clear(); } //###
QmlTransitionPrivate *parent;
};
AnimationList animations;
};
void QmlTransitionPrivate::AnimationList::append(QmlAbstractAnimation *a)
{
QmlConcreteList<QmlAbstractAnimation *>::append(a);
parent->group.addAnimation(a->qtAnimation());
a->setDisableUserControl();
}
void ParallelAnimationWrapper::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
{
QParallelAnimationGroup::updateState(newState, oldState);
if (newState == Stopped &&
((direction() == QAbstractAnimation::Forward && currentLoopTime() == duration()) ||
(direction() == QAbstractAnimation::Backward && currentLoopTime() == 0)))
{
trans->complete();
}
}
QML_DEFINE_TYPE(Qt,4,6,Transition,QmlTransition)
QmlTransition::QmlTransition(QObject *parent)
: QObject(*(new QmlTransitionPrivate), parent)
{
}
QmlTransition::~QmlTransition()
{
}
void QmlTransition::stop()
{
Q_D(QmlTransition);
d->group.stop();
}
void QmlTransition::setReversed(bool r)
{
Q_D(QmlTransition);
d->reversed = r;
}
void QmlTransition::prepare(QmlStateOperation::ActionList &actions,
QList<QmlMetaProperty> &after,
QmlTransitionManager *endState)
{
Q_D(QmlTransition);
qmlExecuteDeferred(this);
if (d->reversed) {
for (int ii = d->animations.count() - 1; ii >= 0; --ii) {
d->animations.at(ii)->transition(actions, after, QmlAbstractAnimation::Backward);
}
} else {
for (int ii = 0; ii < d->animations.count(); ++ii) {
d->animations.at(ii)->transition(actions, after, QmlAbstractAnimation::Forward);
}
}
d->endState = endState;
d->group.setDirection(d->reversed ? QAbstractAnimation::Backward : QAbstractAnimation::Forward);
d->group.start();
}
/*!
\qmlproperty string Transition::from
\qmlproperty string Transition::to
These properties are selectors indicating which state changes should trigger the transition.
from is used in conjunction with to to determine when a transition should
be applied. By default from and to are both "*" (any state). In the following example,
the transition is applied when changing from state1 to state2.
\code
Transition {
from: "state1"
to: "state2"
...
}
\endcode
*/
QString QmlTransition::fromState() const
{
Q_D(const QmlTransition);
return d->fromState;
}
void QmlTransition::setFromState(const QString &f)
{
Q_D(QmlTransition);
d->fromState = f;
}
/*!
\qmlproperty bool Transition::reversible
This property holds whether the transition should be automatically reversed when the conditions that triggered this transition are reversed.
The default value is false.
*/
bool QmlTransition::reversible() const
{
Q_D(const QmlTransition);
return d->reversible;
}
void QmlTransition::setReversible(bool r)
{
Q_D(QmlTransition);
d->reversible = r;
}
QString QmlTransition::toState() const
{
Q_D(const QmlTransition);
return d->toState;
}
void QmlTransition::setToState(const QString &t)
{
Q_D(QmlTransition);
d->toState = t;
}
/*!
\qmlproperty list<Animation> Transition::animations
\default
This property holds a list of the animations to be run for this transition.
The top-level animations are run in parallel. To run them sequentially,
you can create a single SequentialAnimation which contains all the animations,
and assign that to animations the animations property.
\default
*/
QmlList<QmlAbstractAnimation *>* QmlTransition::animations()
{
Q_D(QmlTransition);
return &d->animations;
}
QT_END_NAMESPACE
#include <qmltransition.moc>
|
