Unity 8
windowstatestorage.h
1 /*
2  * Copyright 2015 Canonical Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  */
16 
17 #include <QObject>
18 #include <QSqlDatabase>
19 #include <QMutex>
20 #include <QFuture>
21 
22 class WindowStateStorage: public QObject
23 {
24  Q_OBJECT
25  Q_ENUMS(WindowState)
26 public:
27  enum WindowState {
28  WindowStateNormal,
29  WindowStateMaximized
30  };
31 
32  WindowStateStorage(QObject *parent = 0);
33  virtual ~WindowStateStorage();
34 
35  Q_INVOKABLE void saveState(const QString &windowId, WindowState state);
36  Q_INVOKABLE WindowState getState(const QString &windowId, WindowState defaultValue) const;
37 
38  Q_INVOKABLE void saveGeometry(const QString &windowId, const QRect &rect);
39  Q_INVOKABLE QRect getGeometry(const QString &windowId, const QRect &defaultValue) const;
40 
41 private:
42  void initdb();
43 
44  void saveValue(const QString &queryString);
45  QSqlQuery getValue(const QString &queryString) const;
46 
47  static void executeAsyncQuery(const QString &queryString);
48  static QMutex s_mutex;
49 
50  // NB: This is accessed from threads. Make sure to mutex it.
51  QSqlDatabase m_db;
52 
53  QList< QFuture<void> > m_asyncQueries;
54 };