kwin/src/screens.cpp

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2020-08-02 22:22:19 +00:00
/*
KWin - the KDE window manager
This file is part of the KDE project.
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SPDX-FileCopyrightText: 2013 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "screens.h"
#include <abstract_client.h>
#include "abstract_output.h"
#include "cursor.h"
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#include "utils/common.h"
#include "settings.h"
#include <workspace.h>
#include <config-kwin.h>
#include "platform.h"
namespace KWin
{
Screens *Screens::s_self = nullptr;
Screens *Screens::create(QObject *parent)
{
Q_ASSERT(!s_self);
s_self = new Screens(parent);
Q_ASSERT(s_self);
s_self->init();
return s_self;
}
Screens::Screens(QObject *parent)
: QObject(parent)
, m_count(0)
, m_maxScale(1.0)
{
connect(kwinApp()->platform(), &Platform::screensQueried, this, &Screens::updateCount);
connect(kwinApp()->platform(), &Platform::screensQueried, this, &Screens::changed);
}
Screens::~Screens()
{
s_self = nullptr;
}
void Screens::init()
{
updateCount();
connect(this, &Screens::countChanged, this, &Screens::changed, Qt::QueuedConnection);
connect(this, &Screens::changed, this, &Screens::updateSize);
connect(this, &Screens::sizeChanged, this, &Screens::geometryChanged);
Q_EMIT changed();
}
QRect Screens::geometry(int screen) const
{
if (AbstractOutput *output = findOutput(screen)) {
return output->geometry();
}
return QRect();
}
qreal Screens::scale(int screen) const
{
if (AbstractOutput *output = findOutput(screen)) {
return output->scale();
}
return 1.0;
}
qreal Screens::maxScale() const
{
return m_maxScale;
}
void Screens::updateSize()
{
QRect bounding;
qreal maxScale = 1.0;
for (int i = 0; i < count(); ++i) {
bounding = bounding.united(geometry(i));
maxScale = qMax(maxScale, scale(i));
}
if (m_boundingSize != bounding.size()) {
m_boundingSize = bounding.size();
Q_EMIT sizeChanged();
}
if (!qFuzzyCompare(m_maxScale, maxScale)) {
m_maxScale = maxScale;
Q_EMIT maxScaleChanged();
}
}
void Screens::updateCount()
{
setCount(kwinApp()->platform()->enabledOutputs().size());
}
void Screens::setCount(int count)
{
if (m_count == count) {
return;
}
const int previous = m_count;
m_count = count;
Q_EMIT countChanged(previous, count);
}
int Screens::number(const QPoint &pos) const
{
return kwinApp()->platform()->enabledOutputs().indexOf(kwinApp()->platform()->outputAt(pos));
}
AbstractOutput *Screens::findOutput(int screen) const
{
return kwinApp()->platform()->findOutput(screen);
}
} // namespace