--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/camerauis/cameraapp/generic/inc/CamPropertyWatcher.h Thu Jan 07 16:18:56 2010 +0200
@@ -0,0 +1,129 @@
+/*
+* Copyright (c) 2007 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: Callback wrapper for Publish and Subscribe
+*
+* Copyright © 2007 Nokia. All rights reserved.
+* This material, including documentation and any related computer
+* programs, is protected by copyright controlled by Nokia. All
+* rights are reserved. Copying, including reproducing, storing,
+* adapting or translating, any or all of this material requires the
+* prior written consent of Nokia. This material also contains
+* confidential information which may not be disclosed to others
+* without the prior written consent of Nokia.
+
+*
+*
+*/
+
+
+#ifndef CAMPROPERTYWATCHER_H
+#define CAMPROPERTYWATCHER_H
+
+// INCLUDES
+#include <e32base.h>
+#include <e32property.h>
+
+// FORWARD DECLARATIONS
+class MPropertyObserver;
+
+// CLASS DECLARATION
+
+/**
+* Class to watch for value changes on a property
+*
+* @since 2.8
+*/
+class CCamPropertyWatcher : public CActive
+ {
+public: // Constructors and destructor
+ /**
+ * Symbian OS two-phased constructor
+ * @since 2.8
+ * @param aPropertyObserver The observer, notified when the value changes
+ * @param aCategory the category of the property
+ * @param aKey the identifier of the property
+ */
+ static CCamPropertyWatcher* NewL( MPropertyObserver& aPropertyObserver,
+ const TUid& aCategory,
+ const TUint aKey );
+
+ /**
+ * Destructor.
+ * @since 2.8
+ */
+ ~CCamPropertyWatcher();
+
+public: // New methods
+
+ /**
+ * Register a need for notification of value changes
+ * @since 2.8
+ */
+ void Subscribe();
+
+ /**
+ * Return the current value of the property
+ * @since 2.8
+ * @param aValue Reference to an integer that will receive the current
+ * value of the property
+ * @return KErrNone if successful otherwise another of the system-wide error
+ * codes
+ */
+ TInt Get( TInt& aValue );
+
+private: // new methods
+
+ /**
+ * C++ default constructor.
+ * @since 2.8
+ * @param aPropertyObserver Reference to observer of change events
+ * @param aCategory category of the property
+ * @param aKey identifier of the property
+ */
+ CCamPropertyWatcher( MPropertyObserver& aPropertyObserver,
+ const TUid& aCategory,
+ const TUint aKey );
+ /**
+ * Symbian 2nd phase constructor.
+ * @since 2.8
+ */
+ void ConstructL();
+
+public: // methods from base classes
+
+ /**
+ * From CActive
+ * @since 2.8
+ */
+ void RunL();
+
+private:
+
+ /**
+ * From CActive
+ * @since 2.8
+ */
+ void DoCancel();
+
+private:
+
+ MPropertyObserver& iPropertyObserver; // observer informed of change events
+ RProperty iProperty; // handle to the property
+ TUid iCategory; // category of the property
+ TUint iKey; // identifier of the property
+ };
+
+#endif // CAMPROPERTYWATCHER_H
+
+// End of File