1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QQUICKTRANSITION_H
5#define QQUICKTRANSITION_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include "qquickstate_p.h"
19#include <private/qabstractanimationjob_p.h>
20#include <private/qqmlguard_p.h>
21#include <qqml.h>
22
23#include <QtCore/qobject.h>
24
25QT_BEGIN_NAMESPACE
26
27class QQuickAbstractAnimation;
28class QQuickTransitionPrivate;
29class QQuickTransitionManager;
30class QQuickTransition;
31
32class QQuickTransitionInstance : QAnimationJobChangeListener
33{
34public:
35 QQuickTransitionInstance(QQuickTransition *transition, QAbstractAnimationJob *anim);
36 ~QQuickTransitionInstance();
37
38 void start();
39 void stop();
40 void complete();
41
42 bool isRunning() const;
43
44protected:
45 void animationStateChanged(QAbstractAnimationJob *, QAbstractAnimationJob::State, QAbstractAnimationJob::State) override;
46
47 void removeStateChangeListener()
48 {
49 m_anim->removeAnimationChangeListener(listener: this, QAbstractAnimationJob::StateChange);
50 }
51
52private:
53 QQmlGuard<QQuickTransition> m_transition;
54 QAbstractAnimationJob *m_anim;
55 friend class QQuickTransition;
56};
57
58class Q_QUICK_EXPORT QQuickTransition : public QObject
59{
60 Q_OBJECT
61 Q_DECLARE_PRIVATE(QQuickTransition)
62
63 Q_PROPERTY(QString from READ fromState WRITE setFromState NOTIFY fromChanged)
64 Q_PROPERTY(QString to READ toState WRITE setToState NOTIFY toChanged)
65 Q_PROPERTY(bool reversible READ reversible WRITE setReversible NOTIFY reversibleChanged)
66 Q_PROPERTY(bool running READ running NOTIFY runningChanged)
67 Q_PROPERTY(QQmlListProperty<QQuickAbstractAnimation> animations READ animations)
68 Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged)
69 Q_CLASSINFO("DefaultProperty", "animations")
70 Q_CLASSINFO("DeferredPropertyNames", "animations")
71 QML_NAMED_ELEMENT(Transition)
72 QML_ADDED_IN_VERSION(2, 0)
73
74public:
75 QQuickTransition(QObject *parent=nullptr);
76 ~QQuickTransition();
77
78 QString fromState() const;
79 void setFromState(const QString &);
80
81 QString toState() const;
82 void setToState(const QString &);
83
84 bool reversible() const;
85 void setReversible(bool);
86
87 bool enabled() const;
88 void setEnabled(bool enabled);
89
90 bool running() const;
91
92 QQmlListProperty<QQuickAbstractAnimation> animations();
93
94 QQuickTransitionInstance *prepare(QQuickStateOperation::ActionList &actions,
95 QList<QQmlProperty> &after,
96 QQuickTransitionManager *end,
97 QObject *defaultTarget);
98
99 void setReversed(bool r);
100
101Q_SIGNALS:
102 void fromChanged();
103 void toChanged();
104 void reversibleChanged();
105 void enabledChanged();
106 void runningChanged();
107};
108
109QT_END_NAMESPACE
110
111#endif // QQUICKTRANSITION_H
112

source code of qtdeclarative/src/quick/util/qquicktransition_p.h