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39
40#ifndef QABSTRACTTRANSITION_H
41#define QABSTRACTTRANSITION_H
42
43#include <QtCore/qobject.h>
44
45#include <QtCore/qlist.h>
46
47QT_REQUIRE_CONFIG(statemachine);
48
49QT_BEGIN_NAMESPACE
50
51class QEvent;
52class QAbstractState;
53class QState;
54class QStateMachine;
55
56#if QT_CONFIG(animation)
57class QAbstractAnimation;
58#endif
59
60class QAbstractTransitionPrivate;
61class Q_CORE_EXPORT QAbstractTransition : public QObject
62{
63 Q_OBJECT
64 Q_PROPERTY(QState* sourceState READ sourceState)
65 Q_PROPERTY(QAbstractState* targetState READ targetState WRITE setTargetState NOTIFY targetStateChanged)
66 Q_PROPERTY(QList<QAbstractState*> targetStates READ targetStates WRITE setTargetStates NOTIFY targetStatesChanged)
67 Q_PROPERTY(TransitionType transitionType READ transitionType WRITE setTransitionType REVISION 1)
68public:
69 enum TransitionType {
70 ExternalTransition,
71 InternalTransition
72 };
73 Q_ENUM(TransitionType)
74
75 QAbstractTransition(QState *sourceState = nullptr);
76 virtual ~QAbstractTransition();
77
78 QState *sourceState() const;
79 QAbstractState *targetState() const;
80 void setTargetState(QAbstractState* target);
81 QList<QAbstractState*> targetStates() const;
82 void setTargetStates(const QList<QAbstractState*> &targets);
83
84 TransitionType transitionType() const;
85 void setTransitionType(TransitionType type);
86
87 QStateMachine *machine() const;
88
89#if QT_CONFIG(animation)
90 void addAnimation(QAbstractAnimation *animation);
91 void removeAnimation(QAbstractAnimation *animation);
92 QList<QAbstractAnimation*> animations() const;
93#endif
94
95Q_SIGNALS:
96 void triggered(QPrivateSignal);
97 void targetStateChanged(QPrivateSignal);
98 void targetStatesChanged(QPrivateSignal);
99
100protected:
101 virtual bool eventTest(QEvent *event) = 0;
102
103 virtual void onTransition(QEvent *event) = 0;
104
105 bool event(QEvent *e) override;
106
107protected:
108 QAbstractTransition(QAbstractTransitionPrivate &dd, QState *parent);
109
110private:
111 Q_DISABLE_COPY(QAbstractTransition)
112 Q_DECLARE_PRIVATE(QAbstractTransition)
113};
114
115QT_END_NAMESPACE
116
117#endif
118

source code of qtbase/src/corelib/statemachine/qabstracttransition.h