--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/idlehomescreen/exths/inc/plugincontainer/propertyobserver.h Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,133 @@
+/*
+* Copyright (c) 2002 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:
+ *
+*/
+
+
+#ifndef CPROPERTYOBSERVER_H
+#define CPROPERTYOBSERVER_H
+
+// INCLUDES
+#include <e32base.h>
+#include <e32property.h>
+
+// CLASS DECLARATION
+
+/**
+ * MPropertyChangeHandler.
+ * Abstract interface for handling property change events.
+ **/
+NONSHARABLE_CLASS( MPropertyChangeHandler )
+{
+ public:
+ /**
+ * This is a callback function which is called when a property is changed.
+ *
+ * @param aCategory UID of the category.
+ * @param aKey changed key
+ * @param aValue the new value
+ *
+ * Note! references aKey and aValue are only valid while executing
+ * HandlePropertyChange(). After that the data in which they refer can change.
+ **/
+ virtual void HandlePropertyChange(const TUid& aCategory,
+ const TUint& aKey,
+ const TInt& aValue) = 0;
+};
+
+
+// CLASS DECLARATION
+
+/**
+ * ?one_line_short_description.
+ * ?other_description_lines
+ *
+ * @lib ?
+ * @since Series 60 3.0
+ **/
+NONSHARABLE_CLASS(CPropertyObserver) : public CActive
+{
+ public: // Constructors and destructor
+ /**
+ * Two-phased constructor.
+ * @since Series 60 3.0
+ * @param MPropertyChangeHandler aHandler
+ * @param aCategory
+ * @param aKey
+ **/
+ static CPropertyObserver* NewL(MPropertyChangeHandler& aHandler,
+ const TUid& aCategory,
+ const TUint& aKey);
+
+ /**
+ * Destructor.
+ **/
+ ~CPropertyObserver();
+
+ private:
+ /**
+ * C++ default constructor overload.
+ **/
+ CPropertyObserver(MPropertyChangeHandler& aHandler,
+ const TUid& aCategory,
+ const TUint& aKey);
+
+ /**
+ * By default Symbian 2nd phase constructor is private.
+ **/
+ void ConstructL();
+
+ protected: // Functions from base classes
+ /**
+ * From CActive
+ **/
+ void RunL();
+
+ /**
+ * From CActive
+ **/
+ void DoCancel();
+
+ private: // New functions
+ /**
+ * @since Series 60 3.0
+ **/
+ void Subscribe();
+
+ /**
+ * @since Series 60 3.0
+ **/
+ void NotifyCurrentValue();
+
+ private: // Data
+ // Owns
+ RProperty iProperty;
+
+ // Observed PubSub category
+ const TUid iCategory;
+
+ // Observed key
+ const TUint iKey;
+
+ // Refs. Interface towards observants
+ MPropertyChangeHandler& iHandler;
+
+};
+
+
+#endif // CPROPERTYOBSERVER_H
+
+
+// End of File