129 lines
3.6 KiB
C++
129 lines
3.6 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) 2014 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_xrandr.h"
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#include "xcbutils.h"
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namespace KWin
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{
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XRandRScreens::XRandRScreens(QObject *parent)
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: Screens(parent)
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, X11EventFilter(Xcb::Extensions::self()->randrNotifyEvent())
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{
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}
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XRandRScreens::~XRandRScreens() = default;
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template <typename T>
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void XRandRScreens::update()
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{
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auto fallback = [this]() {
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m_geometries << QRect();
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setCount(1);
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};
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m_geometries.clear();
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T resources(rootWindow());
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if (resources.isNull()) {
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fallback();
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return;
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}
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xcb_randr_crtc_t *crtcs = resources.crtcs();
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QVector<Xcb::RandR::CrtcInfo> infos(resources->num_crtcs);
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for (int i = 0; i < resources->num_crtcs; ++i) {
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infos[i] = Xcb::RandR::CrtcInfo(crtcs[i], resources->config_timestamp);
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}
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for (int i = 0; i < resources->num_crtcs; ++i) {
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Xcb::RandR::CrtcInfo info(infos.at(i));
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const QRect geo = info.rect();
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if (geo.isValid()) {
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m_geometries << geo;
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}
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}
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if (m_geometries.isEmpty()) {
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fallback();
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return;
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}
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setCount(m_geometries.count());
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}
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void XRandRScreens::init()
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{
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KWin::Screens::init();
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// we need to call ScreenResources at least once to be able to use current
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update<Xcb::RandR::ScreenResources>();
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emit changed();
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}
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QRect XRandRScreens::geometry(int screen) const
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{
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if (screen >= m_geometries.size() || screen < 0) {
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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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int XRandRScreens::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.size(); ++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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QSize XRandRScreens::size(int screen) const
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{
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const QRect geo = geometry(screen);
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if (!geo.isValid()) {
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return QSize();
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}
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return geo.size();
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}
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void XRandRScreens::updateCount()
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{
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update<Xcb::RandR::CurrentResources>();
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}
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bool XRandRScreens::event(xcb_generic_event_t *event)
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{
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Q_ASSERT((event->response_type & ~0x80) == Xcb::Extensions::self()->randrNotifyEvent());
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// let's try to gather a few XRandR events, unlikely that there is just one
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startChangedTimer();
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return false;
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}
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} // namespace
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