87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
/*
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* Copyright 2011 Marco Martin <mart@kde.org>
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*
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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 Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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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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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "effectwatcher_p.h"
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#include <QCoreApplication>
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#include <X11/Xlib.h>
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#include <xcb/xcb.h>
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#include <qx11info_x11.h>
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namespace Plasma
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{
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EffectWatcher::EffectWatcher(const QString& property, QObject *parent)
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: QObject(parent),
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m_property(property)
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{
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m_effectActive = isEffectActive();
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QCoreApplication::instance()->installNativeEventFilter(this);
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Display *dpy = QX11Info::display();
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Window root = DefaultRootWindow(dpy);
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XWindowAttributes attrs;
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//Don't reset eventual other masks already there
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XGetWindowAttributes(dpy, root, &attrs);
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attrs.your_event_mask |= PropertyChangeMask;
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XSelectInput(dpy, root, attrs.your_event_mask);
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}
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bool EffectWatcher::nativeEventFilter(const QByteArray& eventType, void *message, long *result)
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{
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Q_UNUSED(result);
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if (eventType != "xcb_generic_event_t")
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return false;
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xcb_generic_event_t* event = reinterpret_cast<xcb_generic_event_t *>(message);
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uint response_type = event->response_type & ~0x80;
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if (response_type != XCB_PROPERTY_NOTIFY)
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return false;
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xcb_property_notify_event_t* prop_event = reinterpret_cast<xcb_property_notify_event_t *>(event);
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Display *dpy = QX11Info::display();
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Atom testAtom = XInternAtom(dpy, m_property.toLatin1(), False);
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if (prop_event->atom == testAtom) {
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bool nowEffectActive = isEffectActive();
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if (m_effectActive != nowEffectActive) {
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m_effectActive = nowEffectActive;
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emit effectChanged(m_effectActive);
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}
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}
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return false;
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}
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bool EffectWatcher::isEffectActive() const
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{
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Display *dpy = QX11Info::display();
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Atom testAtom = XInternAtom(dpy, m_property.toLatin1(), False);
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bool nowEffectActive = false;
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int cnt;
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Atom *list = XListProperties(dpy, DefaultRootWindow(dpy), &cnt);
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if (list != NULL) {
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nowEffectActive = (qFind(list, list + cnt, testAtom) != list + cnt);
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XFree(list);
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}
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return nowEffectActive;
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}
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} // namespace Plasma
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