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81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
/* This file is part of the KDE project
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Copyright (C) 2023 Ivailo Monev <xakepa10@gmail.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2, as published by the Free Software Foundation.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "xwallpaper.h"
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#include <QX11Info>
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#include <QApplication>
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#include <QDesktopWidget>
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#include <KDebug>
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static const QString s_xscreensaver = QString::fromLatin1("/usr/libexec/xscreensaver/binaryring");
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static const int s_updateinterval = 100; // increase to decrease CPU usage
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XWallpaper::XWallpaper(QObject *parent, const QVariantList &args)
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: Plasma::Wallpaper(parent, args),
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m_widget(nullptr),
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m_proc(nullptr),
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m_timer(nullptr)
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{
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m_widget = new QWidget(nullptr, Qt::X11BypassWindowManagerHint);
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// move it outside the screen space, should the resolution change the widget may be visible but
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// neither rendering nor grabbing the window works without the window being visible
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const QRect trect = QApplication::desktop()->geometry();
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m_widget->move(trect.bottom(), trect.right());
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m_widget->show();
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m_proc = new QProcess(this);
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m_proc->start(
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s_xscreensaver,
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QStringList() << "--window-id" << QString::number(qlonglong(m_widget->winId()))
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);
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if (!m_proc->waitForStarted()) {
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kWarning() << "Could not start" << s_xscreensaver;
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return;
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} else {
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kDebug() << "Started" << s_xscreensaver << QString::number(qlonglong(m_widget->winId()));
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}
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m_timer = new QTimer(this);
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m_timer->setInterval(s_updateinterval);
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connect(m_timer, SIGNAL(timeout()), this, SLOT(slotTimeout()));
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m_timer->start();
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}
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XWallpaper::~XWallpaper()
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{
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m_timer->stop();
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m_proc->terminate();
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m_proc->waitForFinished();
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delete m_widget;
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}
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void XWallpaper::paint(QPainter *painter, const QRectF &exposedRect)
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{
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const QSize tsize = targetSizeHint().toSize();
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kDebug() << "Rendering" << s_xscreensaver << tsize;
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m_widget->resize(tsize.width(), tsize.height());
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painter->drawPixmap(QPoint(), QPixmap::grabWindow(m_widget->winId()));
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}
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void XWallpaper::slotTimeout()
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{
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emit update(QRectF());
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}
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#include "moc_xwallpaper.cpp"
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