libquentier  0.4.0
The library for rich desktop clients of Evernote service
QuentierUndoCommand.h
1 /*
2  * Copyright 2016 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/utility/Macros.h>
23 #include <quentier/types/ErrorString.h>
24 #include <QObject>
25 #include <QUndoCommand>
26 
27 namespace quentier {
28 
51 class QuentierUndoCommand: public QObject,
52  public QUndoCommand
53 {
54  Q_OBJECT
55 public:
56  QuentierUndoCommand(QUndoCommand * parent = Q_NULLPTR);
57  QuentierUndoCommand(const QString & text, QUndoCommand * parent = Q_NULLPTR);
58  virtual ~QuentierUndoCommand();
59 
60  virtual void undo() Q_DECL_OVERRIDE Q_DECL_FINAL;
61  virtual void redo() Q_DECL_OVERRIDE Q_DECL_FINAL;
62 
63  bool onceUndoExecuted() const { return m_onceUndoExecuted; }
64 
65 Q_SIGNALS:
66  void notifyError(ErrorString error);
67 
68 protected:
69  virtual void undoImpl() = 0;
70  virtual void redoImpl() = 0;
71 
72 private:
73  bool m_onceUndoExecuted;
74 };
75 
76 } // namespace quentier
77 
78 #endif // LIB_QUENTIER_UTILITY_QUENTIER_UNDO_COMMAND_H
79 
The ErrorString class encapsulates two (or more) strings which are meant to contain translatable (bas...
Definition: ErrorString.h:38
The QuentierUndoCommand class has the sole purpose of working around one quirky aspect of Qt's undo/r...
Definition: QuentierUndoCommand.h:51