--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/3rdparty/phonon/mmf/ancestormovemonitor.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -0,0 +1,180 @@
+/*  This file is part of the KDE project.
+
+Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+
+This library is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 2.1 or 3 of the License.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "ancestormovemonitor.h"
+#include "utils.h"
+#include "videooutput.h"
+
+#include <QCoreApplication>
+
+QT_BEGIN_NAMESPACE
+
+using namespace Phonon::MMF;
+
+/*! \class Phonon::MMF::AncestorMoveMonitor
+  \internal
+  \brief Class which installs a global event filter, and listens for move
+  events which may affect the absolute position of widgets registered with
+  the monitor
+  See QTBUG-4956
+*/
+
+
+/*! \class Phonon::MMF::VideoOutputObserver
+    \internal
+*/
+
+//-----------------------------------------------------------------------------
+// Constructor / destructor
+//-----------------------------------------------------------------------------
+
+AncestorMoveMonitor::AncestorMoveMonitor(QObject *parent)
+    :   QObject(parent)
+{
+    QCoreApplication::instance()->installEventFilter(this);
+}
+
+AncestorMoveMonitor::~AncestorMoveMonitor()
+{
+    QCoreApplication::instance()->removeEventFilter(this);
+}
+
+
+//-----------------------------------------------------------------------------
+// Public functions
+//-----------------------------------------------------------------------------
+
+void AncestorMoveMonitor::registerTarget(VideoOutput *target)
+{
+    TRACE_CONTEXT(AncestorMoveMonitor::registerTarget, EVideoInternal);
+    TRACE_ENTRY("target 0x%08x", target);
+
+    // First un-register the target, in case this is being called as a result
+    // of re-parenting.  This is not the most efficient way to update the
+    // target hash, but since this is not likely to be a frequent operation,
+    // simplicity is preferred over outright speed.  In any case, re-parenting
+    // of the video widget leads to re-creation of native windows, which is
+    // likely to take far more processing than any implementation of this
+    // function.
+    unRegisterTarget(target);
+
+    QWidget *ancestor = target->parentWidget();
+    while(ancestor) {
+        const Hash::iterator it = m_hash.find(ancestor);
+        if(m_hash.end() == it) {
+            TargetList targetList;
+            targetList.append(target);
+            m_hash.insert(ancestor, targetList);
+        } else {
+            TargetList& targetList = it.value();
+            Q_ASSERT(targetList.indexOf(target) == -1);
+            targetList.append(target);
+        }
+        ancestor = ancestor->parentWidget();
+    }
+
+    dump();
+
+    TRACE_EXIT_0();
+}
+
+void AncestorMoveMonitor::unRegisterTarget(VideoOutput *target)
+{
+    TRACE_CONTEXT(AncestorMoveMonitor::unRegisterTarget, EVideoInternal);
+    TRACE_ENTRY("target 0x%08x", target);
+
+    Hash::iterator it = m_hash.begin();
+    while(it != m_hash.end()) {
+        TargetList& targetList = it.value();
+        const int index = targetList.indexOf(target);
+        if(index != -1)
+            targetList.removeAt(index);
+        if(targetList.count())
+            ++it;
+        else
+            it = m_hash.erase(it);
+    }
+
+    dump();
+
+    TRACE_EXIT_0();
+}
+
+bool AncestorMoveMonitor::eventFilter(QObject *watched, QEvent *event)
+{
+    TRACE_CONTEXT(AncestorMoveMonitor::eventFilter, EVideoInternal);
+
+    if(event->type() == QEvent::Move || event->type() == QEvent::ParentChange) {
+
+        //TRACE_ENTRY("watched 0x%08x event.type %d", watched, event->type());
+
+        const Hash::const_iterator it = m_hash.find(watched);
+        if(it != m_hash.end()) {
+            const TargetList& targetList = it.value();
+            VideoOutput* target = 0;
+            foreach(target, targetList) {
+                switch (event->type()) {
+
+                case QEvent::Move:
+                    // Notify the target that its ancestor has moved
+                    target->ancestorMoved();
+                    break;
+
+                case QEvent::ParentChange:
+                    // Update ancestor list for the target
+                    registerTarget(target);
+                    break;
+
+                default:
+                    Q_ASSERT(false);
+                }
+            }
+        }
+
+        //TRACE_EXIT_0();
+    }
+
+    // The event is never consumed by this filter
+    return false;
+}
+
+//-----------------------------------------------------------------------------
+// Private functions
+//-----------------------------------------------------------------------------
+
+void AncestorMoveMonitor::dump()
+{
+#ifndef QT_NO_DEBUG
+    TRACE_CONTEXT(AncestorMoveMonitor::dump, EVideoInternal);
+    for(Hash::const_iterator it = m_hash.begin();
+        it != m_hash.end(); ++it) {
+        const QObject *ancestor = it.key();
+        TRACE("ancestor 0x%08x", ancestor);
+        const TargetList& targetList = it.value();
+        VideoOutput* target = 0;
+        foreach(target, targetList) {
+            TRACE("    target 0x%08x", target);
+        }
+    }
+#endif
+}
+
+
+
+QT_END_NAMESPACE
+