d0c488f4a2
Summary: Most platforms like the nested and virtual do not handle the outputs themselves and WaylandServer announces the Outputs to Wayland. So far this was static: at startup it got announced once to Wayland and any changes were not catched. This change makes WaylandServer listen to changes to the Screens and sync them to Wayland. Unfortunately KWin's internal Screen information is not sufficient to properly synchronize this to Wayland and also Wayland by not supporting adding/removing modes does not help. Thus the solution implemented here is to add new outputs reflecting the changes and then removing the old ones. This creates situations with more outputs being present than actually there, but prevents that there are no outputs at all. Test Plan: Auto test added which verifies this for the virtual platform Reviewers: #kwin, #plasma_on_wayland Subscribers: plasma-devel, kwin Tags: #plasma_on_wayland, #kwin Differential Revision: https://phabricator.kde.org/D2233
98 lines
3 KiB
C++
98 lines
3 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "screens_virtual.h"
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#include "virtual_backend.h"
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namespace KWin
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{
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VirtualScreens::VirtualScreens(VirtualBackend *backend, QObject *parent)
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: Screens(parent)
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, m_backend(backend)
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{
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}
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VirtualScreens::~VirtualScreens() = default;
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void VirtualScreens::init()
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{
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KWin::Screens::init();
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connect(m_backend, &VirtualBackend::sizeChanged,
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this, &VirtualScreens::startChangedTimer);
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connect(m_backend, &VirtualBackend::outputGeometriesChanged, this,
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[this] (const QVector<QRect> &geometries) {
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const int oldCount = m_geometries.count();
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m_geometries = geometries;
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if (oldCount != m_geometries.count()) {
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setCount(m_geometries.count());
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} else {
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emit changed();
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}
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}
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);
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updateCount();
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emit changed();
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}
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QRect VirtualScreens::geometry(int screen) const
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{
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if (screen >= m_geometries.count()) {
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return QRect();
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}
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return m_geometries.at(screen);
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}
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QSize VirtualScreens::size(int screen) const
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{
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return geometry(screen).size();
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}
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void VirtualScreens::updateCount()
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{
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m_geometries.clear();
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const QSize size = m_backend->size();
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for (int i = 0; i < m_backend->outputCount(); ++i) {
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m_geometries.append(QRect(size.width() * i, 0, size.width(), size.height()));
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}
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setCount(m_backend->outputCount());
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}
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int VirtualScreens::number(const QPoint &pos) const
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{
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int bestScreen = 0;
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int minDistance = INT_MAX;
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for (int i = 0; i < m_geometries.count(); ++i) {
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const QRect &geo = m_geometries.at(i);
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if (geo.contains(pos)) {
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return i;
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}
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int distance = QPoint(geo.topLeft() - pos).manhattanLength();
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distance = qMin(distance, QPoint(geo.topRight() - pos).manhattanLength());
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distance = qMin(distance, QPoint(geo.bottomRight() - pos).manhattanLength());
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distance = qMin(distance, QPoint(geo.bottomLeft() - pos).manhattanLength());
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if (distance < minDistance) {
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minDistance = distance;
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bestScreen = i;
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}
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}
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return bestScreen;
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}
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}
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