kwin/screens.h
2016-04-07 16:18:12 +02:00

218 lines
5.4 KiB
C++

/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2013 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#ifndef KWIN_SCREENS_H
#define KWIN_SCREENS_H
// KWin includes
#include <kwinglobals.h>
// KDE includes
#include <KConfig>
#include <KSharedConfig>
// Qt includes
#include <QObject>
#include <QRect>
#include <QTimer>
#include <QVector>
namespace KWin
{
class AbstractClient;
class Platform;
class KWIN_EXPORT Screens : public QObject
{
Q_OBJECT
Q_PROPERTY(int count READ count WRITE setCount NOTIFY countChanged)
Q_PROPERTY(int current READ current WRITE setCurrent NOTIFY currentChanged)
Q_PROPERTY(bool currentFollowsMouse READ isCurrentFollowsMouse WRITE setCurrentFollowsMouse)
public:
virtual ~Screens();
/**
* @internal
**/
void setConfig(KSharedConfig::Ptr config);
int count() const;
int current() const;
void setCurrent(int current);
/**
* Called e.g. when a user clicks on a window, set current screen to be the screen
* where the click occurred
*/
void setCurrent(const QPoint &pos);
/**
* Check whether a client moved completely out of what's considered the current screen,
* if yes, set a new active screen.
*/
void setCurrent(const AbstractClient *c);
bool isCurrentFollowsMouse() const;
void setCurrentFollowsMouse(bool follows);
virtual QRect geometry(int screen) const = 0;
/**
* The bounding geometry of all screens combined. Overlapping areas
* are not counted multiple times.
* @see geometryChanged()
**/
QRect geometry() const;
/**
* The output name of the screen (usually eg. LVDS-1, VGA-0 or DVI-I-1 etc.)
*/
virtual QString name(int screen) const;
/**
* @returns current refreshrate of the @p screen.
**/
virtual float refreshRate(int screen) const;
/**
* @returns size of the @p screen.
*
* To get the size of all screens combined use size().
* @see size()
**/
virtual QSize size(int screen) const = 0;
/**
* The bounding size of all screens combined. Overlapping areas
* are not counted multiple times.
*
* @see geometry()
* @see sizeChanged()
**/
QSize size() const;
virtual int number(const QPoint &pos) const = 0;
inline bool isChanging() { return m_changedTimer->isActive(); }
int intersecting(const QRect &r) const;
public Q_SLOTS:
void reconfigure();
Q_SIGNALS:
void countChanged(int previousCount, int newCount);
/**
* Emitted whenever the screens are changed either count or geometry.
**/
void changed();
void currentChanged();
/**
* Emitted when the geometry of all screens combined changes.
* Not emitted when the geometry of an individual screen changes.
* @see geometry()
**/
void geometryChanged();
/**
* Emitted when the size of all screens combined changes.
* Not emitted when the size of an individual screen changes.
* @see size()
**/
void sizeChanged();
protected Q_SLOTS:
void setCount(int count);
void startChangedTimer();
virtual void updateCount() = 0;
protected:
/**
* Called once the singleton instance has been created.
* Any initialization code should go into this method. Overriding classes have to call
* the base implementation first.
**/
virtual void init();
private Q_SLOTS:
void updateSize();
private:
int m_count;
int m_current;
bool m_currentFollowsMouse;
QTimer *m_changedTimer;
KSharedConfig::Ptr m_config;
QSize m_boundingSize;
KWIN_SINGLETON(Screens)
};
/**
* @brief A base implementation for backends with just a (nested) window
**/
class KWIN_EXPORT BasicScreens : public Screens
{
Q_OBJECT
public:
BasicScreens(Platform *backend, QObject *parent = nullptr);
virtual ~BasicScreens();
void init() override;
QRect geometry(int screen) const override;
int number(const QPoint &pos) const override;
QSize size(int screen) const override;
void updateCount() override;
private:
Platform *m_backend;
QVector<QRect> m_geometries;
};
inline
void Screens::setConfig(KSharedConfig::Ptr config)
{
m_config = config;
}
inline
int Screens::count() const
{
return m_count;
}
inline
bool Screens::isCurrentFollowsMouse() const
{
return m_currentFollowsMouse;
}
inline
void Screens::startChangedTimer()
{
m_changedTimer->start();
}
inline
QSize Screens::size() const
{
return m_boundingSize;
}
inline
QRect Screens::geometry() const
{
return QRect(QPoint(0,0), size());
}
inline
Screens *screens()
{
return Screens::self();
}
}
#endif // KWIN_SCREENS_H