--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/slideshow/utils/shwcallback.h Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,63 @@
+/*
+* 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: Thin callback wrapper
+ *
+*/
+
+
+
+
+// include guard for the whole file content
+#ifndef __TSHWCALLBACK_H__
+#define __TSHWCALLBACK_H__
+
+/**
+ * Helper class to construct a TCallBack from any
+ * public non static TInt (*method)() of a class
+ * Usage:
+ * TShwCallBack< %ClassName%, %MethodName% >(
+ * %ClassPointer% )
+ * Example:
+ * TShwCallBack< CShwEngineImpl, DoStartL >(
+ * this );
+ */
+template< class Object, TInt (Object::*Method)() >
+NONSHARABLE_CLASS( TShwCallBack ) : public TCallBack
+ {
+ public:
+ /**
+ * Constructor.
+ * @param aInstance the object instance of the class
+ */
+ inline TShwCallBack( Object* aInstance )
+ : TCallBack( &DelegateL, aInstance )
+ {}
+
+ private:
+ /**
+ * The callback delegator. Inlined as we dont want
+ * extra method to be created, static so that base
+ * class can call it without pointer to this.
+ * @param aInstance the instance to call back
+ * @return the return value for the TCallBack
+ */
+ inline static TInt DelegateL( TAny* aInstance )
+ {
+ // Dispatch the call to the real objects method
+ return ( static_cast< Object* >( aInstance )->*Method )();
+ }
+ };
+
+
+#endif // __TSHWCALLBACK_H__