diff options
Diffstat (limited to 'src/plugins/platforms/xcb/qxcbeventdispatcher.cpp')
| -rw-r--r-- | src/plugins/platforms/xcb/qxcbeventdispatcher.cpp | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp b/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp new file mode 100644 index 0000000000..3cb2a5b5ef --- /dev/null +++ b/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp @@ -0,0 +1,162 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include "qxcbeventdispatcher.h" +#include "qxcbconnection.h" + +#include <QtCore/QCoreApplication> + +#include <qpa/qwindowsysteminterface.h> + +QT_BEGIN_NAMESPACE + +QXcbUnixEventDispatcher::QXcbUnixEventDispatcher(QXcbConnection *connection, QObject *parent) + : QEventDispatcherUNIX(parent) + , m_connection(connection) +{ +} + +QXcbUnixEventDispatcher::~QXcbUnixEventDispatcher() +{ +} + +bool QXcbUnixEventDispatcher::processEvents(QEventLoop::ProcessEventsFlags flags) +{ + const bool didSendEvents = QEventDispatcherUNIX::processEvents(flags); + m_connection->processXcbEvents(flags); + // The following line should not be necessary after QTBUG-70095 + return QWindowSystemInterface::sendWindowSystemEvents(flags) || didSendEvents; +} + +bool QXcbUnixEventDispatcher::hasPendingEvents() +{ + extern uint qGlobalPostedEventsCount(); + return qGlobalPostedEventsCount() || QWindowSystemInterface::windowSystemEventsQueued(); +} + +void QXcbUnixEventDispatcher::flush() +{ + if (qApp) + qApp->sendPostedEvents(); +} + +#if QT_CONFIG(glib) +struct XcbEventSource +{ + GSource source; + QXcbGlibEventDispatcher *dispatcher; + QXcbGlibEventDispatcherPrivate *dispatcher_p; + QXcbConnection *connection = nullptr; +}; + +static gboolean xcbSourcePrepare(GSource *source, gint *timeout) +{ + Q_UNUSED(timeout) + auto xcbEventSource = reinterpret_cast<XcbEventSource *>(source); + return xcbEventSource->dispatcher_p->wakeUpCalled; +} + +static gboolean xcbSourceCheck(GSource *source) +{ + return xcbSourcePrepare(source, nullptr); +} + +static gboolean xcbSourceDispatch(GSource *source, GSourceFunc, gpointer) +{ + auto xcbEventSource = reinterpret_cast<XcbEventSource *>(source); + QEventLoop::ProcessEventsFlags flags = xcbEventSource->dispatcher->flags(); + xcbEventSource->connection->processXcbEvents(flags); + // The following line should not be necessary after QTBUG-70095 + QWindowSystemInterface::sendWindowSystemEvents(flags); + return true; +} + +QXcbGlibEventDispatcher::QXcbGlibEventDispatcher(QXcbConnection *connection, QObject *parent) + : QEventDispatcherGlib(*new QXcbGlibEventDispatcherPrivate(), parent) +{ + Q_D(QXcbGlibEventDispatcher); + + m_xcbEventSourceFuncs.prepare = xcbSourcePrepare; + m_xcbEventSourceFuncs.check = xcbSourceCheck; + m_xcbEventSourceFuncs.dispatch = xcbSourceDispatch; + m_xcbEventSourceFuncs.finalize = nullptr; + + m_xcbEventSource = reinterpret_cast<XcbEventSource *>( + g_source_new(&m_xcbEventSourceFuncs, sizeof(XcbEventSource))); + + m_xcbEventSource->dispatcher = this; + m_xcbEventSource->dispatcher_p = d_func(); + m_xcbEventSource->connection = connection; + + g_source_set_can_recurse(&m_xcbEventSource->source, true); + g_source_attach(&m_xcbEventSource->source, d->mainContext); +} + +QXcbGlibEventDispatcherPrivate::QXcbGlibEventDispatcherPrivate() +{ +} + +QXcbGlibEventDispatcher::~QXcbGlibEventDispatcher() +{ + g_source_destroy(&m_xcbEventSource->source); + g_source_unref(&m_xcbEventSource->source); +} + +bool QXcbGlibEventDispatcher::processEvents(QEventLoop::ProcessEventsFlags flags) +{ + m_flags = flags; + return QEventDispatcherGlib::processEvents(m_flags); +} + +#endif // QT_CONFIG(glib) + +QAbstractEventDispatcher *QXcbEventDispatcher::createEventDispatcher(QXcbConnection *connection) +{ +#if QT_CONFIG(glib) + if (qEnvironmentVariableIsEmpty("QT_NO_GLIB") && QEventDispatcherGlib::versionSupported()) { + qCDebug(lcQpaXcb, "using glib dispatcher"); + return new QXcbGlibEventDispatcher(connection); + } else +#endif + { + qCDebug(lcQpaXcb, "using unix dispatcher"); + return new QXcbUnixEventDispatcher(connection); + } +} + +QT_END_NAMESPACE |