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39
40#ifndef QHISTORYSTATE_H
41#define QHISTORYSTATE_H
42
43#include <QtCore/qabstractstate.h>
44
45QT_REQUIRE_CONFIG(statemachine);
46
47QT_BEGIN_NAMESPACE
48
49class QAbstractTransition;
50class QHistoryStatePrivate;
51class Q_CORE_EXPORT QHistoryState : public QAbstractState
52{
53 Q_OBJECT
54 Q_PROPERTY(QAbstractState* defaultState READ defaultState WRITE setDefaultState NOTIFY defaultStateChanged)
55 Q_PROPERTY(QAbstractTransition* defaultTransition READ defaultTransition WRITE setDefaultTransition NOTIFY defaultTransitionChanged)
56 Q_PROPERTY(HistoryType historyType READ historyType WRITE setHistoryType NOTIFY historyTypeChanged)
57public:
58 enum HistoryType {
59 ShallowHistory,
60 DeepHistory
61 };
62 Q_ENUM(HistoryType)
63
64 QHistoryState(QState *parent = nullptr);
65 QHistoryState(HistoryType type, QState *parent = nullptr);
66 ~QHistoryState();
67
68 QAbstractTransition *defaultTransition() const;
69 void setDefaultTransition(QAbstractTransition *transition);
70
71 QAbstractState *defaultState() const;
72 void setDefaultState(QAbstractState *state);
73
74 HistoryType historyType() const;
75 void setHistoryType(HistoryType type);
76
77Q_SIGNALS:
78 void defaultTransitionChanged(QPrivateSignal);
79 void defaultStateChanged(QPrivateSignal);
80 void historyTypeChanged(QPrivateSignal);
81
82protected:
83 void onEntry(QEvent *event) override;
84 void onExit(QEvent *event) override;
85
86 bool event(QEvent *e) override;
87
88private:
89 Q_DISABLE_COPY(QHistoryState)
90 Q_DECLARE_PRIVATE(QHistoryState)
91};
92
93QT_END_NAMESPACE
94
95#endif
96

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