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Lts/Viewer/SituationMap/Rubberbands/event_delegater.h

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+/**
+**
+** @RDE_HEADER@
+** Event Dispatcher for Qt5 to delegate mouse and keyboard event to another event dispatcher
+** $Id$
+** $HeadURL$
+** $Author$
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Hardware-Environment: Intel-PC
+** Software-Environment: Windows 7, Qt 5.4. ArcGIS 10.2.5
+**
+** Language ........: C++ 11
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Author ...........: Jörg Turla, SPD G, Tel. 3132
+**
+** -----------------------------------------------------------------------------------------------
+**
+** Notes .........:
+**
+**   15.04.2015, JT  : first edition
+**
+** -----------------------------------------------------------------------------------------------
+*/
+
+#pragma once
+
+#include <QtCore/QPointer>
+
+#include "abstract_event_dispatcher.h"
+
+
+namespace SituationMap { namespace RB
+{
+
+   /**
+     @class EventDelegater event_delegater.h
+     @brief Event filter that delegates events to another event filter
+
+     Some Qt-Widgets have a special viewport widget. In this case keyboard and mouse events
+     are sended to different widgets. To concentrate the event handling in one event filter
+     for both types of events, it is necessary to forward events from event filter to another
+     one.
+
+     @see AbstractEventDispatcher, EventDispatcher, EventMouseNavigator
+   */
+   class EventDelegater final : public AbstractEventDispatcher
+   {
+      Q_OBJECT
+      public:
+
+         EventDelegater( QWidget * getEventsFrom, AbstractEventDispatcher * delegateEventTo );
+
+         ~EventDelegater() = default;
+
+         EventDelegater(const EventDelegater &) = delete;
+         EventDelegater & operator = (const EventDelegater &) = delete;
+
+      protected:
+
+         QPointer<AbstractEventDispatcher> _delegateEventTo;
+
+         bool eventFilter(QObject*, QEvent*) override;
+
+         void KickTheBucket() override;
+   }; /* EventDelegater */
+
+
+} } /* namespace SituationMap::RB */