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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QSTATEMACHINE_H
#define QSTATEMACHINE_H
#include <QtCore/qcoreevent.h>
#include <QtCore/qlist.h>
#include <QtCore/qobject.h>
#include <QtCore/qset.h>
#include <QtCore/qvariant.h>
#include <QtStateMachine/qstate.h>
#if __has_include(<chrono>)
# include <chrono>
#endif
QT_BEGIN_NAMESPACE
class QStateMachinePrivate;
class QAbstractAnimation;
class Q_STATEMACHINE_EXPORT QStateMachine : public QState
{
Q_OBJECT
Q_PROPERTY(QString errorString READ errorString BINDABLE bindableErrorString)
Q_PROPERTY(QState::RestorePolicy globalRestorePolicy READ globalRestorePolicy
WRITE setGlobalRestorePolicy BINDABLE bindableGlobalRestorePolicy)
Q_PROPERTY(bool running READ isRunning WRITE setRunning NOTIFY runningChanged)
#if QT_CONFIG(animation)
Q_PROPERTY(bool animated READ isAnimated WRITE setAnimated BINDABLE bindableAnimated)
#endif
public:
class Q_STATEMACHINE_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_STATEMACHINE_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,
StateMachineChildModeSetToParallelError
};
explicit QStateMachine(QObject *parent = nullptr);
explicit QStateMachine(QState::ChildMode childMode, QObject *parent = nullptr);
~QStateMachine();
void addState(QAbstractState *state);
void removeState(QAbstractState *state);
Error error() const;
QString errorString() const;
void clearError();
QBindable<QString> bindableErrorString() const;
bool isRunning() const;
#if QT_CONFIG(animation)
bool isAnimated() const;
void setAnimated(bool enabled);
QBindable<bool> bindableAnimated();
void addDefaultAnimation(QAbstractAnimation *animation);
QList<QAbstractAnimation *> defaultAnimations() const;
void removeDefaultAnimation(QAbstractAnimation *animation);
#endif // animation
QState::RestorePolicy globalRestorePolicy() const;
void setGlobalRestorePolicy(QState::RestorePolicy restorePolicy);
QBindable<QState::RestorePolicy> bindableGlobalRestorePolicy();
void postEvent(QEvent *event, EventPriority priority = NormalPriority);
int postDelayedEvent(QEvent *event, int delay);
bool cancelDelayedEvent(int id);
QSet<QAbstractState*> configuration() const;
bool eventFilter(QObject *watched, QEvent *event) override;
#if __has_include(<chrono>) || defined(Q_QDOC)
int postDelayedEvent(QEvent *event, std::chrono::milliseconds delay)
{
return postDelayedEvent(event, int(delay.count()));
}
#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) override;
void onExit(QEvent *event) 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) 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())
#if QT_CONFIG(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))
};
QT_END_NAMESPACE
#endif
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