/*

* Copyright (c) 2009 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:

*

*/

#ifndef CCALENVIEWATTACHMENTSDIALOG_H

#define CCALENVIEWATTACHMENTSDIALOG_H

// ========== INCLUDE FILES ================================

#include <eiklbx.h>

#include <eikfrlb.h>        // for CFormattedCellListBoxItemDrawer

#include <aknlists.h>       // for CAknDoubleLargeStyleListBox

#include <AknForm.h>

#include <AknServerApp.h>

#include <aknlongtapdetector.h>

#include <calennotificationhandler.h>   // MCalenNotificationHandler

#include "calenattalistitemarray.h"

#include "calenattachmentitemdrawer.h"

#include "calenattachmentslistbox.h"

// ========== CONSTANTS ====================================

const TInt KCalenAttaItemTextLength = 256;

// ========== FORWARD DECLARATIONS =========================

class MAknLongTapDetectorCallBack;

class CGulIcon;

class CAknTitlePane;

class CCalenController;

class CCalenAttachmentModel;

class CCalenAttachmentInfo;

class CDocumentHandler;

class CAknWaitDialog;

class CAknNavigationControlContainer;

class CAiwGenericParamList;

// ========== CLASS DECLARATION ============================

/**

* View attachments dialog.

*/

class CCalenViewAttachmentsDialog : public CAknDialog,

                                  public MEikListBoxObserver,

                                  public MAknServerAppExitObserver,

                                  public MCalenNotificationHandler

    {

    public:

        /**

         * First phase constructor

         * 

         * @param aController A reference to calencontroller

         * @return pointer to CCalenAttachmentSelectionObserver

         */

        static CCalenViewAttachmentsDialog* NewL( TDesC& aTitle,                                            

                                                        CCalenAttachmentModel& aAttachmentModel,

                                                        CCalenController& aController);

        /**

        * Destructor.

        */

        ~CCalenViewAttachmentsDialog();

        /**

        * 2nd phase constructor.

        * Deprecated.

        */

        void ConstructL();

    public: // new functions

        /**

        * Returns the index of currently selected listbox item or KErrNotFound if list

        * empty or no selection.

        * @return current index

        */

        TInt CurrentListItemIndex();

        /**

        * Updates icon of list item indicated by 'aListIndex'.

        * @param aListIndex

        */

        void UpdateIcon( TInt aListIndex );

        /**

        * Handle listbox item addition. Call this after you have added attachment

        * to the attachment model. If you inserted attachment to some other

        * position than last, use same index as aIndex.

        * @param aIndex item index

        */

        void ItemAddedL( TInt aIndex = -1 );

        /**

        * Handle listbox item removal. Call this after you have removed attachment

        * from the attachment model.

        * @param aIndex item index

        */

        void ItemRemovedL( TInt aIndex );

        /**

       * NotifySizeChanged, calls SizeChanged() method of

       * dialog's listbox

       * 

       */

       void NotifySizeChanged();

       /**

       * Updates all attachments fetched flags

       * in attachment model.

       */

       void UpdateAttachmentsFetchFlags();        

       /**

       * From MEikListBoxObserverClass

       */

       void HandleListBoxEventL( 

           CEikListBox* aListBox, TListBoxEvent aEventType );

       /**

       * Updates list of attatchments if attatchment 

       * dialog is opened before all attatchments 

       * are loaded.

       */

       void UpdateAttatchmentListL();

    public:   // from CAknDialog

        /**

        * Processes menu commands.

        * @param aCommandId

        */

        void ProcessCommandL( TInt aCommandId );

        /**

        * Removes default menu items from CAknFrom and adds own custom menu

        * items whose resource id was given in construstor.

        * @param aMenuId

        * @param aMenuPane

        */

        void DynInitMenuPaneL( TInt aMenuId, CEikMenuPane* aMenuPane );

        /**

        * From CCoeControl

        */

        void HandleResourceChange( TInt aType );

        /**

         * From CCoeControl Handle pointer event

         * @param aPointerEvent Event to be handled.

         */

        void HandlePointerEventL(const TPointerEvent& aPointerEvent);

        /**

        * Prepare icons and listbox.

        */

        void LoadFormDataL();

        /**

        * Remove attachment from model.

        * @param aIndex attachment index

        */

        TInt RemoveAttachmentL( TInt aIndex );

        /**

         * From CCoeControl, return child control count.

         * @return Control count

         */

        TInt CountComponentControls() const;

        /**

         * From CCoeControl, return child control pointer.

         * @param aIndex Child control index

         * @return Child control pointer.

         */

        CCoeControl* ComponentControl(TInt aIndex) const;

    public: // from MAknServerAppExitObserver

        /**

        * Handle the exit of a connected server app.

        * This implementation provides S60 default behavior

        * for handling of the EAknCmdExit exit code. Derived classes

        * should base-call this implementation if they override this

        * function.

        *

        * @since S60 5.0

        *

        * @param aReason The reason that the server application exited.

        * This will either be an error code, or the command id that caused

        * the server app to exit.

        */

        void HandleServerAppExit( TInt aReason );                

    protected: // from CAknDialog

        /**

        *

        * @param aButtonId

        * @return

        */

        TBool OkToExitL( TInt aButtonId );

        /**

        * Create custom control.

        * @param aControlType

        * @return

        */

        SEikControlInfo CreateCustomControlL( TInt aControlType );

        /**

        * Set the generic parameter list used in opening content CDocumentHandler

        * Ownership is transferred to base class

        */

        void SetOpenParamList( CAiwGenericParamList* aOpenParamList );

        /**

        * Set the generic parameter list used in opening content CDocumentHandler

        * Ownership is transferred to base class

        */

        CAiwGenericParamList* OpenParamList();

    protected: // from CEikDialog

        /**

        *

        */

        void PreLayoutDynInitL();

        /**

        *

        */

        void HandleControlStateChangeL( TInt aControlId );

    private:

        /**

        * Constructor.

        * @param aTitle           title for dialog (shown in title pane)

        * @param aMenuId          resource id for menu

        * @param aAttachmentModel reference to attachment model

        * @param aController      reference to calencontroller 

        */

        CCalenViewAttachmentsDialog( TDesC& aTitle,                                            

                                     CCalenAttachmentModel& aAttachmentModel,

                                     CCalenController& aController);

        /**

        * Common part for ConstructL methods.

        */

        void DoConstructL();

        /**

        * Function that TCleanupItem calls.

        */

        static void CleanupWaitDialog( TAny* aAny );        

        /**

        * Performs UI updating.

        */

        void DoUpdateUiL();

        /**

        * Update CBA button visibility.

        */

        void UpdateButtonVisiblity( TInt aCommandId, TBool aValue );

        /**

         * Handles notifications (Leaving)

         */

        void HandleNotificationL( TCalenNotification aNotification );

        // from MCalenNotificationHandler

        /**

         * Handles notifications

         */

        void HandleNotification( const TCalenNotification aNotification );

		/**

		* Opens the attachment. Its a commadn handler for opening the attachment

		*/

        void OpenAttachmentL();                

		/**

		* Tell whether attachment can be removed or not

		*/       

        TBool CanRemoveAttachment( CCalenAttachmentInfo& aInfo );

		/**

		* Sets the text for MSK

		*/

        void SetMiddleSoftKeyLabelL(TInt aResourceId, 

                                                TInt aCommandId );

		/**

		* Updates the text for MSK

		*/

        void UpdateMiddleSoftKeyL( TInt aIndex ); 

		/**

		* Checks if free memory available in the device is below critical level

		*/

        TBool CheckSpaceBelowCriticalLevelL();

        /// From CCoeControl

        TKeyResponse OfferKeyEventL(

            const TKeyEvent& aKeyEvent,TEventCode aType);

        /// From CCoeControl                

        void GetHelpContext( TCoeHelpContext& aContext) const;

		/**

		* Framework function to handle the back press

		*/

        TBool HandleOkToExitL( TInt aButtonId );

        /**

         * Opens the attachment  

         * 

         * @param RFile File handler to be opened

         * @param aExitObserver Exit observer that listens for exiting from the attahcment viewer

         * @return None

         */

         void OpenAttachmentViewerL(RFile& file, MAknServerAppExitObserver& aExitObserver);

    protected: // data

        CCalenAttachmentModel&         iAttachmentModel;

        CCalenAttaListItemArray*       iListItems;

        CArrayPtr<CGulIcon>*           iIconArray;

        CCalenAttachmentsListBox*      iListBox;        

        TInt                           iBusy;        

    private: // data

        HBufC*                         iOldTitle;

        CAknTitlePane*                 iTitlePane;

        TInt                           iMenuId;

        CAknWaitDialog*                iWaitDialog;         //not used as of now.

        CAknNavigationControlContainer* iNaviPane;

        RFile                          iREMOVED; 

        // Kept only for maintaining BC

        // If opening through CDocumentHandler needs parameters,

        // derived class must insert parameters here.  

        // The iOpenParamList is initially empty

        CAiwGenericParamList*           iOpenParamList;

        TInt                            iSelectedCommand;

        // reference to the calencontroller

        CCalenController&               iController;

        CDocumentHandler*               iDocHandler; 

        const TDesC&                    iNewTitle;

        TBool                           iEmbeddedFileOpened;

        // Internal status flags

        TInt iFlags;

    };

#endif // CMSGVIEWATTACHMENTSDIALOG_H

// End of File