/*

* Copyright (c) 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:  Popup adaptive search grid component

*

*/

#ifndef __AKNADAPTIVESEARCHGRID_H__

#define __AKNADAPTIVESEARCHGRID_H__

// INCLUDES

#include <AknControl.h>     // CCoeControl

#include <aknbutton.h>	    // CAknbutton

#include <eiklabel.h>

#include "AknAdaptiveSearchGridObserver.h"

#include <AknWsEventObserver.h>

// FORWARD DECLARATIONS

class CAknsBasicBackgroundControlContext;

class CAknsFrameBackgroundControlContext;

class CAknsListBoxBackgroundControlContext;

class CAknInputFrame;

class CEikEdwin;

// CLASS DECLARATION

/**

 *  The class to provide adaptive search grid for the application

 *

 *  @lib avkon.lib

 *  @since Series 60 5.0

 */

class CAknAdaptiveSearchGrid : public CAknControl, 							   

							   public MCoeControlObserver,

							   public MCoeControlBackground,

							   public MAknWsEventObserver				   

    {

    public: // Constructors and destructor

    /**

     * Two-phased constructor.

     *

     * @param aTextLimit text limit for the findpane. 

     * @param aFieldStyle The same flag as search field

     * @return Pointer to the created adaptive search grid object

     */

    static CAknAdaptiveSearchGrid* NewL( const TInt aTextLimit, 

                                         TInt aFieldStyle );

    /**

     * Two-phased constructor.

     *

     * @param aTextLimit text limit for the findpane. 

     * @param aFieldStyle The same flag as search field

     * @return Pointer to the created adaptive search grid object

     */

    static CAknAdaptiveSearchGrid* NewLC( const TInt aTextLimit, 

                                          TInt aFieldStyle );

        /**

         * Destructor.

         */

         ~CAknAdaptiveSearchGrid();

    public:  // From base classes

		/**

         * From CCoeControl.

         * Gets the number of controls contained in a compound control.

         *

         * @return The number of component controls contained by this control.

         */

         TInt CountComponentControls() const;

        /**

         * From CCoeControl.

         * Gets the specified component of a compound control.

         *

         * @param aIndex The index of the control to get

         * @return The component control with an index of aIndex.

         */

         CCoeControl* ComponentControl( TInt aIndex ) const ;

    	/**

         * From CCoeControl.

         * Handles a change to the control's resources.

         *

         * @param aType A message UID value.

         */

         void HandleResourceChange( TInt aType );

        /**

         * From CCoeControl.

         * Retrieves an object of the same type as that encapsulated in aId.

         *

         * @param aId An encapsulated object type ID.

         * @return Encapsulated pointer to the object provided. 

         *      Note that the encapsulated pointer may be NULL.

         */

         TTypeUid::Ptr MopSupplyObject( TTypeUid aId );

        /**

         * From MCoeControlObserver.

         * Handles an event from an observed adaptive search grid item.

         *

         * @param aControl The control which sent the event

         * @param aEventType The event type

         */

         void HandleControlEventL( CCoeControl* aControl, TCoeEvent aEventType );

	    /**

         * From CCoeControl       

         *          

         * @param aRect the rectangle of this view that needs updating

         */

         void Draw( const TRect& aRect ) const;

        /**

         * From CCoeControl.

         * This function is called whenever a control gains or loses focus.

         *

         * @param aDrawNow Contains the value that was passed to it by SetFocus().

         */

         void FocusChanged( TDrawNow aDrawNow );

        /**

         * From MAknWsEventObserver. Handles window server events.       

         *       

         * @param The event that occurred.

         * @param The control that the event occurred in.                 

         */

         void HandleWsEventL( const TWsEvent& aEvent, CCoeControl* aDestination ); 

        /**

         * From MCoeControlBackground.

         * Draw the background for a given control.

         * The text drawer that shall be used to draw text on the specific

         * background can be fetched through the GetTextDrawer() method.

         *

         * @param aGc Graphics context used for drawing.

         * @param aControl The control being drawn (may be a child of the drawer).

         * @param aRect The area to be redrawn.

         */

        void Draw( CWindowGc& aGc, const CCoeControl& aControl, const TRect& aRect ) const;

    public: // New functions     

        /**

         * Sets the observer for the adaptive search grid.

         *

         * @param aObserver A pointer to the observer. Ownership is not changed.

         */

         void SetAdaptiveSearchGridObserver( MAknAdaptiveSearchGridObserver* aObserver );

        /**

         * Returns a pointer to the adaptive search grid observer.

         *

         * @return Pointer to the adaptive search grid observer.

         */

         MAknAdaptiveSearchGridObserver* AdaptiveSearchGridObserver();        

        /**

         * Shows or hides adaptive search grid. 

         * Position of the top left corner should be set in advance. 

         * Adaptive search grid set visible with this method is by default focusing.

         * Does nothing if adaptive search grid is disabled.

         *          

         * @param aVisible ETrue to show it, EFalse to hide it.

         * @param aSelectAll ETrue to highlight all content of editor.

         */

         void SetVisibilityL( TBool aVisible, TBool aSelectAll );

        /**

         * Show adaptive search grid button.

         */

         void ShowL();

        /**

         * Returns adaptive search grid visibility at this moment

         *

         * @return ETrue, if adaptive search grid is shown.

         */

         TBool IsShown() const;

   		/**

         * Set chars to button array        

         * 

         * @param aGridChars are the characters for adaptive search grid.                  

         */

	 	 void SetButtonGridChars( const TDesC& aGridChars );

		/**

		 * Sets text into search field.

		 * 		 

		 * @param const aSearchTxt Reference to the text buffer.

         */            

	     void SetSearchTextToFindPane( const TDesC& aSearchTxt );

		/**

         * Initiates buttons for adaptive search grid        

         */

		 void InitGridButtons();

	    /**

         * Initiates position for buttons of grid        

         */

         void GridButtonsPositions();

       	/**

         * Main function for initiation adaptive search grid       

         */

  		 void InitGrid();  		 

  		/**

         * Show controls backspase, close, prev, next buttons and find pane      

         */

  		 void ShowControls();

        /**

         * Hides adaptive search grid.

         */

         void HideL();              

         static const TInt EDeleteLastCharPressed = -1;

		 static const TInt ECloseGridPressed = -2;  

    protected: // From base class

  		/**

         * From CCoeControl.

         * Responds to size changes to sets the size and position of 

         * the contents of this control.

         */

         void SizeChanged();  

    private: // Constructors

        /**

         * C++ default constructor.

         *

         * @param aTextLimit text limit for the findpane. 

         */

         CAknAdaptiveSearchGrid( const TInt aTextLimit );               

        /**

         * Symbian 2nd phase constructor.

         * @param aFieldStyle The same flag as search field

         */

         void ConstructL( TInt aFieldStyle );

    private: // New functions         

        /**

         * Update page indicator.

         */

         void UpdatePageIndicatorL();    

        /**

         * Sets the flag to be on or off and also calls

         * CCoeControl::MakeVisible().

         * 

         * @param aShown is True, if adaptive search grid is shown.                  

         */

         void SetShown( const TBool aShown );

        /**

         * Create and add button controlto adaptive search grid.

         * 

         * @param aText text for button grid                       

         */

         CAknButton* CreateButtonL();  

        /**

         * Show next page

         */ 

         void NextPage();

        /**

         * Show previous page

         */

         void PrevPage();     

        /**

         * Initiate controls

         * Create control buttons: close, backspase, next, previous.

         * @param aFieldStyle The same flag as search field

         */

         void InitControlsL( TInt aFieldStyle);

        /**

         * Initiate position for controls

         */         

    	 void ControlsPositions();         

	    /**

         * Gets rect from layout data

         */

         TRect RectFromLayout( const TRect& aParent,

             const TAknWindowComponentLayout& aComponentLayout ) const;

        /**

         * Update visibility of buttons from grid

         */

         void UpdateVisibleButtonsL();

        /**

         * Update layout option accoding to current amount of rows

         */

         void UpdatePageAndRowCount();    

         /**

         * Update icon's color accoding to current theme

         */

         CGulIcon* GetColorIconL( TInt aIndex );

         /**

          * Update layout variant

          */

         void UpdateLayoutVariant();

         /**

          * Update adaptive search grid skin.

          */

         void UpdateSkinL();

    private: // Member variables

        // array for adaptive search grid buttons

        RPointerArray<CAknButton> iButtonArray;

        // control buttons

        CAknButton* iCloseButton;

        CAknButton* iDeleteButton;  

        CAknButton* iPrevButton;

        CAknButton* iNextButton;       

        CAknButton* iLastFocusedButton;

        // page indicator if several pages       

        CEikLabel* iPageIndicator;           

        // find pane for AS

        CAknInputFrame* iInputFrame;

        CEikEdwin* iEditor;         

        TInt iTextLimit;     

	    // skin context for find pane

   	    CAknsListBoxBackgroundControlContext* iSkinContextOfFindPane;   	

   	    CAknsFrameBackgroundControlContext* iBgContextOfFindPane; 

   	    // contex for control pane   

   	    CAknsBasicBackgroundControlContext* iBgContextOfControlPane;    	     

        // whether adaptive search grid is shown right now

        // IsVisible() is not safe enough because can be 

        // changed from outside with MakeVisible() 

        TBool iShown;

	    // number of grid rows and cols

       	TInt iNumOfRows;

       	TInt iNumOfCols;

       	// number of grid pages

       	TInt iNumOfPages;

       	// current page which shown on screen

       	TInt iCurrentPage;

       	// current amount of total grid button

       	TInt iTotalGridButtons;

       	// max amount of total grid button

       	TInt iMaxAmountOfButtons;

       	// current button icon size

       	TSize iButtonIconSize; 

       	// chars of grid

       	HBufC* iGridChars;          	

        // region which AS cover currently 	

        RRegion iCurrentRegion;

        // current layout option

       	// 0 portrait with pages

        // 1 landscape with pages

        // 2 portrait with no pages

        // 3 landscape with no pages       	

       	TInt iLayoutOption;   

       	TBool iToolbarShown;   

       	// not owned

       	CAknAppUi* iAppUi;        

    	// observer to report adaptive search grid item events

   		// not owned

       	MAknAdaptiveSearchGridObserver* iAdaptiveSearchGridObserver;      	

       	//Reset grids position when layout is changed.

       	TBool iLayoutChanged;

        // For ELJG-7VC8Q2: popup find pane overlap with Adaptive Search grid  

        TBool iPopupFindpane;

        // The length of overlap section 

        TInt iOverlapLength;

    };

#endif // __AKNADAPTIVESEARCHGRID_H__

// End of File