Unity 8
windowstatestorage.h
1 /*
2  * Copyright 2015-2016 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 = 1 << 0,
29  WindowStateMaximized = 1 << 1,
30  WindowStateMinimized = 1 << 2,
31  WindowStateFullscreen = 1 << 3,
32  WindowStateMaximizedLeft = 1 << 4,
33  WindowStateMaximizedRight = 1 << 5,
34  WindowStateMaximizedHorizontally = 1 << 6,
35  WindowStateMaximizedVertically = 1 << 7
36  };
37  Q_DECLARE_FLAGS(WindowStates, WindowState)
38 #if (QT_VERSION >= QT_VERSION_CHECK(5, 5, 0))
39  Q_FLAG(WindowStates)
40 #endif
41 
42  WindowStateStorage(QObject *parent = 0);
43  virtual ~WindowStateStorage();
44 
45  Q_INVOKABLE void saveState(const QString &windowId, WindowState state);
46  Q_INVOKABLE WindowState getState(const QString &windowId, WindowState defaultValue) const;
47 
48  Q_INVOKABLE void saveGeometry(const QString &windowId, const QRect rect);
49  Q_INVOKABLE QRect getGeometry(const QString &windowId, const QRect defaultValue) const;
50 
51  Q_INVOKABLE void saveStage(const QString &appId, int stage);
52  Q_INVOKABLE int getStage(const QString &appId) const;
53 
54 private:
55  void initdb();
56 
57  void saveValue(const QString &queryString);
58  QSqlQuery getValue(const QString &queryString) const;
59 
60  static void executeAsyncQuery(const QString &queryString);
61  static QMutex s_mutex;
62 
63  // NB: This is accessed from threads. Make sure to mutex it.
64  QSqlDatabase m_db;
65 
66  QList< QFuture<void> > m_asyncQueries;
67 };