/*

* Copyright (c) 2004-2005 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: 

*     See class description below

*

*/

#ifndef __LANDMARKS_CONTAINER_BASE_H__

#define __LANDMARKS_CONTAINER_BASE_H__

#include "LandmarksOperationObserver.h"

#include "LandmarksDbObserver.h"

#include <coecntrl.h>

class CAknView;

class CLandmarksApplicationEngine;

class CLandmarksListBox;

class CAknSearchField;

/**

*  CLandmarksContainerBase is an abstrct class that contains functions and data

*  common for all view containers in this application.

*/

class CLandmarksContainerBase :

    public CCoeControl,

    public MLandmarksDbObserver,

    public MLandmarksOperationObserver

    {

    public: // Constructors and destructor

        /**

        *  Destructor

        */

        ~CLandmarksContainerBase();

    public: // New functions

        /**

        * Indicates whether a listbox item is selected or not.

        */

        TBool IsItemSelected();

    public: // from CoeControl

        /**

        * Gets the number of controls contained in a compound control

        *

        * @return Number of component controls

        */

        TInt CountComponentControls() const;

        /**

        * Gets the specified component

        *

        * @param aIndex specification for component pointer

        * @return Pointer to component control

        */

        CCoeControl* ComponentControl(TInt aIndex) const;

        /**

        * Called by framework when the view size is changed.

        */

        void SizeChanged();

        /** Reacts to screen size change */

        void HandleResourceChange( TInt aType );

    public: // From MLandmarksDbObserver

        /**

        * Notifies that an event has occurred in the default

        * landmark database.

        *

        * @param aEvent contains info about the event.

        * @param aErrorCode possible error codes if reporting the event was

        * not successful.

        */

        void NotifyDbEventL(TPosLmEvent& aEvent, TInt aErrorCode) = 0;

    public: // From MLandmarksOperationObserver

        /**

        * Notifies the progress and status of an

        * asynchronous operation.

        *

        * @param aOperation the type of operation that is reported.

        * @param aProgress the progress of the operation.

        * @param aErrorCode the status of the operation.

        */

        void NotifyOperationProgressL(

            TOperation aOperation,

            TInt aProgress,

            TInt aErrorCode) = 0;

    protected: // Constructors

        /**

        * C++ default constructor.

        *

        * @param aView The parent view.

        * @param aEngine The application engine.

        */

        CLandmarksContainerBase(

            CAknView& aView,

            CLandmarksApplicationEngine& aEngine);

        /**

        * Performs the second phase construction of a

        * CLandmarksContainerBase object. Should be called by subclasses.

        *

        * @param aRect Frame rectangle for container.

        */

        void ConstructL(const TRect& aRect);

    private:

        /**

        * Creates the find box.

        */

        void CreateFindBoxL();

        /**

        * Creates the listbox.

        */

        void CreateListBoxL();

    protected: // Data

        //! the control used to display icons and descriptors.

        CLandmarksListBox* iListBox;

        //! the control used to display a search field.

        CAknSearchField* iFindBox;

        //! parent view

        CAknView& iView;

        //! the application engine used for accessing landmarks

        CLandmarksApplicationEngine& iEngine;

        //! a buffer containing the last descriptor in the find box.

        HBufC* iOldFilter;

    };

#endif // __LANDMARKS_CONTAINER_BASE_H__