libquentier  0.5.0
The library for rich desktop clients of Evernote service
QuentierUndoCommand.h
1 /*
2  * Copyright 2016-2020 Dmitry Ivanov
3  *
4  * This file is part of libquentier
5  *
6  * libquentier is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU Lesser General Public License as published by
8  * the Free Software Foundation, version 3 of the License.
9  *
10  * libquentier is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public License
16  * along with libquentier. If not, see <http://www.gnu.org/licenses/>.
17  */
18 
19 #ifndef LIB_QUENTIER_UTILITY_QUENTIER_UNDO_COMMAND_H
20 #define LIB_QUENTIER_UTILITY_QUENTIER_UNDO_COMMAND_H
21 
22 #include <quentier/types/ErrorString.h>
23 #include <quentier/utility/Macros.h>
24 
25 #include <QObject>
26 #include <QUndoCommand>
27 
28 namespace quentier {
29 
55 class QuentierUndoCommand: public QObject, public QUndoCommand
56 {
57  Q_OBJECT
58 public:
59  QuentierUndoCommand(QUndoCommand * parent = nullptr);
60  QuentierUndoCommand(const QString & text, QUndoCommand * parent = nullptr);
61  virtual ~QuentierUndoCommand() override;
62 
63  virtual void undo() override final;
64  virtual void redo() override final;
65 
66  bool onceUndoExecuted() const { return m_onceUndoExecuted; }
67 
68 Q_SIGNALS:
69  void notifyError(ErrorString error);
70 
71 protected:
72  virtual void undoImpl() = 0;
73  virtual void redoImpl() = 0;
74 
75 private:
76  bool m_onceUndoExecuted;
77 };
78 
79 } // namespace quentier
80 
81 #endif // LIB_QUENTIER_UTILITY_QUENTIER_UNDO_COMMAND_H
82 
quentier::ErrorString
The ErrorString class encapsulates two (or more) strings which are meant to contain translatable (bas...
Definition: ErrorString.h:43
quentier::QuentierUndoCommand
The QuentierUndoCommand class has the sole purpose of working around one quirky aspect of Qt's undo/r...
Definition: QuentierUndoCommand.h:55