--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/slideshow/engine/inc/shwevent.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,189 @@
+/*
+* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:    The event interface
+ *
+*/
+
+
+
+
+#ifndef __SHWEVENT_H__
+#define __SHWEVENT_H__
+
+// INCLUDES
+#include <e32std.h>
+#include <e32base.h>
+
+// FORWARD DECLARATIONS
+
+// CLASS DECLARATION
+
+/**
+ *  MShwEvent, interface for event objects
+ */
+class MShwEvent
+	{
+	public:
+
+		/**
+		 * Destructor, Allow deletion through this interface, 
+		 * If the event queue needs a copy of the event object it needs to delete the copy.
+		 */
+		virtual ~MShwEvent() {};
+
+	public: // the API
+
+		/**
+		 * This method returns a permanent copy the event object. 
+		 * This is needed so that the event queue can keep a pointer to the 
+		 * event while the event sending code goes out of scope.
+		 * This method needs to store the original object to cleanupstack
+		 * @return a clone of the event object
+		 */
+		virtual MShwEvent* CloneLC() = 0;
+
+	};
+
+/**
+ *  TShwParametrizedEvent, event object with a value
+ */
+NONSHARABLE_CLASS( TShwParametrizedEvent ) : public MShwEvent
+	{
+	public:
+
+		/**
+		 * Constructor.
+		 * @param aValue, the value for the parameter
+		 */
+		TShwParametrizedEvent( TInt aValue );
+		
+		/**
+		 * Destructor.
+		 */
+		~TShwParametrizedEvent();
+
+		/**
+		 * This method can be used to get a named parameter from the event.
+		 * @return the integer value
+		 */
+		TInt Parameter();
+
+	private:
+		/// Own: the value
+		TInt iValue;
+	};
+
+// Macro to avoid copy & pasting similar code throughout the event classes
+#define SHW_DECLARE_EVENT_CLASS( cls ) \
+NONSHARABLE_CLASS( cls ) : public MShwEvent { \
+	public: \
+		/** Constructor */\
+		cls(); \
+		/** Destructor */\
+		~cls(); \
+		/** @see MShwEvent::CloneLC() */\
+		MShwEvent* CloneLC(); }\
+
+#define SHW_DECLARE_PARAMETER_EVENT_CLASS( cls ) \
+NONSHARABLE_CLASS( cls ) : public TShwParametrizedEvent { \
+	public: \
+		/** Constructor */\
+		cls( TInt aValue ); \
+		/** Destructor */\
+		~cls(); \
+		/** @see MShwEvent::CloneLC() */\
+		MShwEvent* CloneLC(); } \
+
+/**
+ * Initialize slide show
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventInitialize );
+
+/**
+ * Start the slide show
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventStart );
+
+/**
+ * Pause the slide show 
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventPause );
+
+/**
+ * Resume from pause
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventResume );
+
+/**
+ *  Next image by the user
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventNextImage );
+
+/**
+ * Previous image by the user
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventPreviousImage );
+
+/**
+ * Timer beat occurred
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventTimerBeat );
+
+/**
+ * View mode is starting
+ */
+SHW_DECLARE_PARAMETER_EVENT_CLASS( TShwEventStartView  );
+
+/**
+ * Ready to start viewing current slide
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventReadyToView );
+
+/**
+ * Ready to advance to next slide
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventReadyToAdvance );
+
+/**
+ * Transition mode is starting
+ */
+SHW_DECLARE_PARAMETER_EVENT_CLASS( TShwEventStartTransition );
+
+/**
+ * Transition mode is ready
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventTransitionReady );
+
+/**
+ * Music volume is adjusted down
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventVolumeDown );
+
+/**
+ * Music volume is adjusted up
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventVolumeUp );
+
+/**
+ * Exit slide show because of an error
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventFatalError );
+
+/**
+ * Selection key pressed for changed ui state (Hide or visible)
+ */
+SHW_DECLARE_EVENT_CLASS( TShwEventToggleControlUi );
+
+
+#endif // __SHWEVENT_H__