44e37aacdf
Screens::init sets up a Qt::QueuedConnection connect from countChanged to changed. This means that when first setting up the connection a changed signal will be delivered in the next event cycle. This can mess with other code. E.g. WaylandServer recreating outputs which can make Xwayland crash or KWin internally crash. To solve this problem we just need to make sure to set the output count to the initial value before performing the init. Reviewed-By: bshah
107 lines
3 KiB
C++
107 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_drm.h"
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#include "drm_backend.h"
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#include "drm_output.h"
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namespace KWin
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{
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DrmScreens::DrmScreens(DrmBackend *backend, QObject *parent)
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: Screens(parent)
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, m_backend(backend)
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{
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connect(backend, &DrmBackend::screensQueried, this, &DrmScreens::updateCount);
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connect(backend, &DrmBackend::screensQueried, this, &DrmScreens::changed);
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}
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DrmScreens::~DrmScreens() = default;
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void DrmScreens::init()
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{
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updateCount();
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KWin::Screens::init();
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emit changed();
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}
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QRect DrmScreens::geometry(int screen) const
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{
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const auto outputs = m_backend->outputs();
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if (screen >= outputs.size()) {
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return QRect();
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}
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return outputs.at(screen)->geometry();
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}
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QSize DrmScreens::size(int screen) const
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{
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const auto outputs = m_backend->outputs();
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if (screen >= outputs.size()) {
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return QSize();
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}
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return outputs.at(screen)->size();
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}
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void DrmScreens::updateCount()
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{
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setCount(m_backend->outputs().size());
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}
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int DrmScreens::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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const auto outputs = m_backend->outputs();
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for (int i = 0; i < outputs.size(); ++i) {
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const QRect &geo = outputs.at(i)->geometry();
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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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QString DrmScreens::name(int screen) const
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{
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const auto outputs = m_backend->outputs();
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if (screen >= outputs.size()) {
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return Screens::name(screen);
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}
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return outputs.at(screen)->name();
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}
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float DrmScreens::refreshRate(int screen) const
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{
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const auto outputs = m_backend->outputs();
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if (screen >= outputs.size()) {
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return Screens::refreshRate(screen);
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}
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return outputs.at(screen)->currentRefreshRate() / 1000.0f;
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}
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}
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