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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: This file contains the header file of the CCallBack
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* class.
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*
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*/
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#ifndef CALLBACK_H
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#define CALLBACK_H
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// INCLUDES
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#include <e32base.h>
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// CONSTANTS
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// None
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// MACROS
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// None
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// DATA TYPES
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// None
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// FUNCTION PROTOTYPES
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// None
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// FORWARD DECLARATIONS
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// None
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// CLASS DECLARATION
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// DESCRIPTION
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// Simple class for callbacks.
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class CCallBack
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:public CAsyncCallBack
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{
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public: // Enumerations
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private: // Enumerations
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public: // Constructors and destructor
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/**
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* C++ constructor.
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*/
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CCallBack( TInt aPriority ):CAsyncCallBack( aPriority ) {}
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/**
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* C++ constructor.
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*/
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CCallBack( TCallBack& aCallBack, TInt aPriority ):
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CAsyncCallBack( aCallBack, aPriority ) {}
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public: // New functions
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/**
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* Return reference to TRequestStatus member.
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*/
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TRequestStatus& Status(){ return iStatus; }
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/**
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* Set CCallBack active.
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*/
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void SetActive()
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{
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iStatus = KRequestPending;
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CActive::SetActive();
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};
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public: // Functions from base classes
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/**
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*
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*/
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void RunL(){ iCallBack.CallBack(); }
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protected: // New functions
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protected: // Functions from base classes
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private:
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public: // Data
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protected: // Data
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private: // Data
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public: // Friend classes
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protected: // Friend classes
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private: // Friend classes
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};
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template <class T>
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class CActiveCallback
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:public CActive
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{
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public: // Enumerations
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/**
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* Callback function type definitions
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*/
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typedef void (T::* TestFunction)();
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private: // Enumerations
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public: // Constructors and destructor
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/**
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* C++ constructor.
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*/
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CActiveCallback ( T* aClass, TestFunction aFunction ) : CActive (EPriorityStandard)
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{
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iMethod = aFunction;
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iClass = aClass;
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iCompleted = EFalse;
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}
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public: // New functions
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/**
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* Return reference to TRequestStatus member.
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*/
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TRequestStatus& Status(){ return iStatus; }
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/**
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* Set active object to active and return reference to TRequestStatus member
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*/
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TRequestStatus& Activate()
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{
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iCompleted = EFalse;
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SetActive();
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return iStatus;
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}
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/**
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* Is callback completed?
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*/
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TBool isCompleted()
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{
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return iCompleted;
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}
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public: // Functions from base classes
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/**
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* Call the callback
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*/
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void RunL()
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{
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iCompleted = ETrue;
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if ( iMethod != NULL )
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{
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(iClass->*iMethod) ();
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}
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}
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/**
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* Just forward errors to framework
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*/
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TInt RunError ( TInt aError )
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{
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return aError;
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}
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/**
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* Cancel is not supported.
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*/
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void DoCancel ()
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{
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}
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protected: // New functions
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protected: // Functions from base classes
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private:
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public: // Data
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protected: // Data
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private: // Data
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TestFunction iMethod; // Pointer to method to be called
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T* iClass; // Pointer to calls to be called
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TBool iCompleted; // Is callback completed?
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public: // Friend classes
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protected: // Friend classes
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private: // Friend classes
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};
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#endif // CALLBACK_H
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// End of File
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