kwin/screens.cpp

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/********************************************************************
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/>.
*********************************************************************/
#include "screens.h"
#include "client.h"
#include "cursor.h"
#include "settings.h"
#include "workspace.h"
#include <QApplication>
#include <QDesktopWidget>
#include <QTimer>
namespace KWin
{
KWIN_SINGLETON_FACTORY_FACTORED(Screens, DesktopWidgetScreens)
Screens::Screens(QObject *parent)
: QObject(parent)
, m_count(0)
, m_current(0)
, m_currentFollowsMouse(false)
, m_changedTimer(new ScreenCountTimer(this))
{
m_changedTimer->setSingleShot(true);
m_changedTimer->setInterval(100);
connect(m_changedTimer, SIGNAL(timeout()), SLOT(updateCount()));
connect(m_changedTimer, SIGNAL(timeout()), SIGNAL(changed()));
Settings settings;
settings.setDefaults();
m_currentFollowsMouse = settings.activeMouseScreen();
}
Screens::~Screens()
{
s_self = NULL;
}
void Screens::reconfigure()
{
if (!m_config) {
return;
}
Settings settings(m_config);
settings.readConfig();
setCurrentFollowsMouse(settings.activeMouseScreen());
}
void Screens::setCount(int count)
{
if (m_count == count) {
return;
}
const int previous = m_count;
m_count = count;
emit countChanged(previous, count);
}
void Screens::setCurrent(int current)
{
if (m_current == current) {
return;
}
m_current = current;
}
void Screens::setCurrent(const QPoint &pos)
{
setCurrent(number(pos));
}
void Screens::setCurrent(const Client *c)
{
if (!c->isActive()) {
return;
}
if (!c->isOnScreen(m_current)) {
setCurrent(c->screen());
}
}
void Screens::setCurrentFollowsMouse(bool follows)
{
if (m_currentFollowsMouse == follows) {
return;
}
m_currentFollowsMouse = follows;
}
int Screens::current() const
{
if (m_currentFollowsMouse) {
return number(Cursor::pos());
}
Client *client = Workspace::self()->activeClient();
if (client && !client->isOnScreen(m_current)) {
return client->screen();
}
return m_current;
}
ScreenCountTimer::ScreenCountTimer(QObject * parent) : QTimer(parent)
{
}
void ScreenCountTimer::finish()
{
if (isActive()) {
stop();
Screens::self()->updateCount();
QMetaObject::invokeMethod(Screens::self(), "changed", Qt::QueuedConnection);
}
}
DesktopWidgetScreens::DesktopWidgetScreens(QObject *parent)
: Screens(parent)
, m_desktop(QApplication::desktop())
{
connect(m_desktop, SIGNAL(screenCountChanged(int)), SLOT(startChangedTimer()));
connect(m_desktop, SIGNAL(resized(int)), SLOT(startChangedTimer()));
updateCount();
}
DesktopWidgetScreens::~DesktopWidgetScreens()
{
}
QRect DesktopWidgetScreens::geometry(int screen) const
{
finishChangedTimer();
return m_desktop->screenGeometry(screen);
}
int DesktopWidgetScreens::number(const QPoint &pos) const
{
finishChangedTimer();
return m_desktop->screenNumber(pos);
}
void DesktopWidgetScreens::updateCount()
{
setCount(m_desktop->screenCount());
}
} // namespace