1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtCore module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QHISTORYSTATE_H 41 #define QHISTORYSTATE_H 42 43 #include <QtCore/qabstractstate.h> 44 45 QT_REQUIRE_CONFIG(statemachine); 46 47 QT_BEGIN_NAMESPACE 48 49 class QAbstractTransition; 50 class QHistoryStatePrivate; 51 class 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) 57 public: 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 77 Q_SIGNALS: 78 void defaultTransitionChanged(QPrivateSignal); 79 void defaultStateChanged(QPrivateSignal); 80 void historyTypeChanged(QPrivateSignal); 81 82 protected: 83 void onEntry(QEvent *event) override; 84 void onExit(QEvent *event) override; 85 86 bool event(QEvent *e) override; 87 88 private: 89 Q_DISABLE_COPY(QHistoryState) 90 Q_DECLARE_PRIVATE(QHistoryState) 91 }; 92 93 QT_END_NAMESPACE 94 95 #endif 96