screens.h [kde-workspace/kwin/screens.h]

1	/********************************************************************
2	KWin - the KDE window manager
3	This file is part of the KDE project.
4
5	Copyright (C) 2013 Martin Gräßlin <mgraesslin@kde.org>
6
7	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or
10	(at your option) any later version.
11
12	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.
16
17	You should have received a copy of the GNU General Public License
18	along with this program. If not, see <http://www.gnu.org/licenses/>.
19	*********************************************************************/
20	#ifndef KWIN_SCREENS_H
21	#define KWIN_SCREENS_H
22
23	// KWin includes
24	#include <kwinglobals.h>
25	// KDE includes
26	#include <KDE/KConfig>
27	// Qt includes
28	#include <QObject>
29	#include <QRect>
30	#include <QTimer>
31
32	class QDesktopWidget;
33
34	namespace KWin
35	{
36	class Client;
37
38	class Screens : public QObject
39	{
40	Q_OBJECT
41	Q_PROPERTY(int count READ count WRITE setCount NOTIFY countChanged)
42	Q_PROPERTY(int current READ current WRITE setCurrent)
43	Q_PROPERTY(bool currentFollowsMouse READ isCurrentFollowsMouse WRITE setCurrentFollowsMouse)
44
45	public:
46	virtual ~Screens();
47	/**
48	* @internal
49	**/
50	void setConfig(KSharedConfig::Ptr config);
51	int count() const;
52	int current() const;
53	void setCurrent(int current);
54	/**
55	* Called e.g. when a user clicks on a window, set current screen to be the screen
56	* where the click occurred
57	*/
58	void setCurrent(const QPoint &pos);
59	/**
60	* Check whether a client moved completely out of what's considered the current screen,
61	* if yes, set a new active screen.
62	*/
63	void setCurrent(const Client *c);
64	bool isCurrentFollowsMouse() const;
65	void setCurrentFollowsMouse(bool follows);
66	virtual QRect geometry(int screen) const = `0`;
67	virtual int number(const QPoint &pos) const = `0`;
68
69	inline bool isChanging() { return m_changedTimer->isActive(); }
70
71	int intersecting(const QRect &r) const;
72
73	public Q_SLOTS:
74	void reconfigure();
75
76	Q_SIGNALS:
77	void countChanged(int previousCount, int newCount);
78	/**
79	* Emitted whenever the screens are changed either count or geometry.
80	**/
81	void changed();
82
83	protected Q_SLOTS:
84	void setCount(int count);
85	void startChangedTimer();
86	virtual void updateCount() = `0`;
87
88	private:
89	int m_count;
90	int m_current;
91	bool m_currentFollowsMouse;
92	QTimer *m_changedTimer;
93	KSharedConfig::Ptr m_config;
94
95	KWIN_SINGLETON(Screens)
96	};
97
98	class DesktopWidgetScreens : public Screens
99	{
100	Q_OBJECT
101	public:
102	DesktopWidgetScreens(QObject *parent);
103	virtual ~DesktopWidgetScreens();
104	virtual QRect geometry(int screen) const;
105	virtual int number(const QPoint &pos) const;
106	protected Q_SLOTS:
107	void updateCount();
108
109	private:
110	QDesktopWidget *m_desktop;
111	};
112
113	inline
114	void Screens::setConfig(KSharedConfig::Ptr config)
115	{
116	m_config = config;
117	}
118
119	inline
120	int Screens::count() const
121	{
122	return m_count;
123	}
124
125	inline
126	bool Screens::isCurrentFollowsMouse() const
127	{
128	return m_currentFollowsMouse;
129	}
130
131	inline
132	void Screens::startChangedTimer()
133	{
134	m_changedTimer->start();
135	}
136
137	inline
138	Screens *screens()
139	{
140	return Screens::self();
141	}
142
143	}
144
145	#endif // KWIN_SCREENS_H
146