summaryrefslogtreecommitdiffstats
path: root/src/corelib/statemachine/qstatemachine.h
blob: d6c3b7bfa7ca4a5a5d8ea1a6e9fbc6a6d8af9b3a (plain)
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
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QSTATEMACHINE_H
#define QSTATEMACHINE_H

#include <QtCore/qstate.h>

#include <QtCore/qcoreevent.h>
#include <QtCore/qlist.h>
#include <QtCore/qobject.h>
#include <QtCore/qset.h>
#include <QtCore/qvariant.h>

QT_BEGIN_NAMESPACE


#ifndef QT_NO_STATEMACHINE

class QStateMachinePrivate;
class QAbstractAnimation;
class Q_CORE_EXPORT QStateMachine : public QState
{
    Q_OBJECT
    Q_PROPERTY(QString errorString READ errorString)
    Q_PROPERTY(QState::RestorePolicy globalRestorePolicy READ globalRestorePolicy WRITE setGlobalRestorePolicy)
    Q_PROPERTY(bool running READ isRunning WRITE setRunning NOTIFY runningChanged)
#ifndef QT_NO_ANIMATION
    Q_PROPERTY(bool animated READ isAnimated WRITE setAnimated)
#endif
public:
    class Q_CORE_EXPORT SignalEvent : public QEvent
    {
    public:
        SignalEvent(QObject *sender, int signalIndex,
                     const QList<QVariant> &arguments);
        ~SignalEvent();

        inline QObject *sender() const { return m_sender; }
        inline int signalIndex() const { return m_signalIndex; }
        inline QList<QVariant> arguments() const { return m_arguments; }

    private:
        QObject *m_sender;
        int m_signalIndex;
        QList<QVariant> m_arguments;

        friend class QSignalTransitionPrivate;
    };

    class Q_CORE_EXPORT WrappedEvent : public QEvent
    {
    public:
        WrappedEvent(QObject *object, QEvent *event);
        ~WrappedEvent();

        inline QObject *object() const { return m_object; }
        inline QEvent *event() const { return m_event; }

    private:
        QObject *m_object;
        QEvent *m_event;
    };

    enum EventPriority {
        NormalPriority,
        HighPriority
    };

    enum Error {
        NoError,
        NoInitialStateError,
        NoDefaultStateInHistoryStateError,
        NoCommonAncestorForTransitionError
    };

    explicit QStateMachine(QObject *parent = 0);
    explicit QStateMachine(QState::ChildMode childMode, QObject *parent = 0);
    ~QStateMachine();

    void addState(QAbstractState *state);
    void removeState(QAbstractState *state);

    Error error() const;
    QString errorString() const;
    void clearError();

    bool isRunning() const;

#ifndef QT_NO_ANIMATION
    bool isAnimated() const;
    void setAnimated(bool enabled);

    void addDefaultAnimation(QAbstractAnimation *animation);
    QList<QAbstractAnimation *> defaultAnimations() const;
    void removeDefaultAnimation(QAbstractAnimation *animation);
#endif // QT_NO_ANIMATION

    QState::RestorePolicy globalRestorePolicy() const;
    void setGlobalRestorePolicy(QState::RestorePolicy restorePolicy);

    void postEvent(QEvent *event, EventPriority priority = NormalPriority);
    int postDelayedEvent(QEvent *event, int delay);
    bool cancelDelayedEvent(int id);

    QSet<QAbstractState*> configuration() const;

#ifndef QT_NO_STATEMACHINE_EVENTFILTER
    bool eventFilter(QObject *watched, QEvent *event) Q_DECL_OVERRIDE;
#endif

public Q_SLOTS:
    void start();
    void stop();
    void setRunning(bool running);

Q_SIGNALS:
    void started(QPrivateSignal);
    void stopped(QPrivateSignal);
    void runningChanged(bool running);


protected:
    void onEntry(QEvent *event) Q_DECL_OVERRIDE;
    void onExit(QEvent *event) Q_DECL_OVERRIDE;

    virtual void beginSelectTransitions(QEvent *event);
    virtual void endSelectTransitions(QEvent *event);

    virtual void beginMicrostep(QEvent *event);
    virtual void endMicrostep(QEvent *event);

    bool event(QEvent *e) Q_DECL_OVERRIDE;

protected:
    QStateMachine(QStateMachinePrivate &dd, QObject *parent);

private:
    Q_DISABLE_COPY(QStateMachine)
    Q_DECLARE_PRIVATE(QStateMachine)
    Q_PRIVATE_SLOT(d_func(), void _q_start())
    Q_PRIVATE_SLOT(d_func(), void _q_process())
#ifndef QT_NO_ANIMATION
    Q_PRIVATE_SLOT(d_func(), void _q_animationFinished())
#endif
    Q_PRIVATE_SLOT(d_func(), void _q_startDelayedEventTimer(int, int))
    Q_PRIVATE_SLOT(d_func(), void _q_killDelayedEventTimer(int, int))
};

#endif //QT_NO_STATEMACHINE

QT_END_NAMESPACE

#endif