--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vtuis/videotelui/inc/commands/cvtuicmdvalidatorbase.h	Wed Sep 01 12:29:12 2010 +0100
@@ -0,0 +1,116 @@
+/*
+* 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:  Base class for command validators.
+*
+*/
+
+
+#ifndef C_VTUICMDVALIDATORBASE_H
+#define C_VTUICMDVALIDATORBASE_H
+
+#include <e32base.h>
+
+#include "tvtuicmdcontexttype.h"
+
+class CVtUiCmdValidationActionBase;
+class CVtUiCmdCustomValidationActionBase;
+
+/**
+ *  CVtUiCmdValidatorBase
+ *
+ *  Base class for all validators. Validator implementations validate commands
+ *  and other properties (like softkey resource IDs) on context basis. E.g.
+ *  primary validator will validate commands in all contexts, while toolbar
+ *  validator will do fine tuning for commands only in menu context, so that
+ *  commands that are visible in toolbar are not shown in menu.
+ *
+ *  @since S60 v3.2
+ */
+NONSHARABLE_CLASS( CVtUiCmdValidatorBase ) : public CBase
+    {
+
+public: // public methods
+
+    /**
+     * Returns validator priority.
+     *
+     * @return Validator priority.
+     */
+    TInt Priority() const;
+
+public: // pure virtual methods
+
+    /**
+     * Validates menu items.
+     *
+     * @param aAction Reference to validation action.
+     * @param aReferencePriority Context reference priority.
+     */
+    virtual void ValidateMenuItemsL( CVtUiCmdValidationActionBase& aAction,
+        TInt aReferencePriority ) = 0;
+
+    /**
+     * Validates softkey items.
+     *
+     * @param aAction Reference to validation action.
+     * @param aReferencePriority Context reference priority.
+     */
+    virtual void ValidateSoftkeyItemsL( CVtUiCmdValidationActionBase& aAction,
+        TInt aReferencePriority ) = 0;
+
+    /**
+     * Validates toolbar items.
+     *
+     * @param aAction Reference to validation action.
+     * @param aReferencePriority Context reference priority.
+     */
+    virtual void ValidateToolbarItemsL( CVtUiCmdValidationActionBase& aAction,
+        TInt aReferencePriority ) = 0;
+
+    /**
+     * Custom validation.
+     *
+     * @param aAction Reference to custom validation action.
+     * @param aReferencePriority Context reference priority.
+     */
+    virtual void CustomValidationL( CVtUiCmdCustomValidationActionBase& aAction,
+        TInt aReferencePriority ) = 0;
+
+    /**
+     * Query for context validation.
+     *
+     * @param aCtxType Command context type.
+     * @return ETrue if this instance validates given context type, EFalse
+     * otherwise.
+     */
+    virtual TBool ValidatesContext( const TVtUiCmdContextType& aCtxType )
+        const = 0;
+
+protected:
+
+    /**
+     * C++ constructor
+     *
+     * @param aPriority Validator priority.
+     */
+    CVtUiCmdValidatorBase( TInt aPriority );
+
+private: // data
+
+    // Validator priority
+    const TInt iPriority;
+
+    };
+
+#endif // C_VTUICMDVALIDATORBASE_H