/*

* Copyright (c) 2002 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: 

*  Search Field support. 

*

*

*/

#ifndef __AKNSFLD_H__

#define __AKNSFLD_H__

// INCLUDES

#include <AknControl.h>

#include <gulicon.h>

#include <eikgted.h>

#include <aknappui.h>

#include <e32property.h>  // for subscriber/publisher

// FORWARD DECLARATIONS

class CEikEdwin;

class CGlobalText;

class CAknInputFrame;

class CAknSearchFieldIndicator;

class CAknsListBoxBackgroundControlContext;

class CAknsFrameBackgroundControlContext;

class CEikListBox;

class CAknAdaptiveSearch;

class MAdaptiveSearchTextObserver; 

class CAknSearchField;

class CHwKbSubscriber;

/** 

 * Adaptive search text observer will be notified when adaptive search 

 * text/language are changed. Notify about text changing when adaptive search 

 * grid is opened for the first time (empty search text is generated) or when 

 * user taps the grid so that new character is inputted. Notify about language

 * chnging when got information from CenRep.  

 * 

 * @since 5.0 

 */ 

class MAdaptiveSearchTextObserver 

    { 

    public: 

       /** 

        * Notification and handling of an adaptive search text change. 

        * 

        * @param aSearchField The source search field of this message. 

        */ 

        virtual void AdaptiveSearchTextChanged( CAknSearchField* aSearchField ) = 0; 

    }; 

// CLASS DECLARATION

/**

 * The CAknSearchField class implements a Search field control. There are 

 * different styles for the search field defined by a TSearchFieldStyle.

 *

 * @since Series 60 0.9

 */

NONSHARABLE_CLASS(CAknSearchField) : public CAknControl,

		                             public MCoeControlObserver,			

                		             public MEikCommandObserver

{

public:

   /**

    * Search field style.

    */

    enum TSearchFieldStyle 

        {

        /** Use only ESearch in Series 60 */

        ESearch,

        /** (Not used) */        

        EInput,

        /** (Not used) */

        EUrl,  

        /** (Not used) */

        EPhone,

        /** (Not used) */

        EPlain,

        /** Use as popup search field. */

        EPopup,         

        /** Use as pinb search field. */

        EPinb,          

        /** For Clock application/list_single_heading_pane. */

        EClockApp,      

        /** Same as ESearch, but using CreateWindowL(). */

        EFixed,         

        /** Layout where no line is used. */

        ESearchWithoutLine, 

        /** Popup window layout. */

        EPopupWindow,

	    /** For adaptive search grid */

	    /** @since 5.0 */

	    EAdaptiveSearch,

	    /** For adaptive search grid */

	    /** Same as EAdaptiveSearch, but using CreateWindowL(). */

	    /** @since 5.0 */

	    EAdaptive,

        /** For adaptive search grid */

	    /** Same as EAdaptiveSearch, but using popup find pane. */

	    /** @since 5.0 */

	    EPopupAdaptiveSearch,

        /** For adaptive search grid */

	    /** Popup window layout */

	    /** @since 5.0 */

	    EPopupAdaptiveSearchWindow

        };

public:

   /**

    * Destructor.

    */

    IMPORT_C ~CAknSearchField();

   /**

    * Two-phased constructor.

    * @param aParent Reference to parent control.

    * @param aFieldStyle Defines the UI style.

    * @param aIcon A pointer to the icon to be shown in the search box frame.

    *              Takes ownerships. Can be @c NULL.

    * @param aTextLimit Defines the maximum text length.

    * @return A pointer to contructed @c CAknSearchField object.

    */

    IMPORT_C static CAknSearchField* NewL( const CCoeControl& aParent, TSearchFieldStyle aFieldStyle, CGulIcon* aIcon, TInt aTextLimit );

public:                 // for search string manipulation

   /**

    * Returns the length of search text.

    * @return The length of search text.

    */

    IMPORT_C TInt TextLength() const;

   /**

    * Returns the text of search field by writing it into the 

    * buffer aSearchTxt.

    * @param aSearchTxt Reference to the text buffer. Buffer size must be same

    *                   or greater than maximum text length, which is given in 

    *                   constructor.

    */

    IMPORT_C void GetSearchText( TDes& aSearchTxt ) const;

   /**

    * Sets text into search field.

    * @param aSearchTxt Reference to the text buffer.

    */

    IMPORT_C void SetSearchTextL( const TDesC& aSearchTxt );

   /**

    * Selects the whole search text.

    */

    IMPORT_C void SelectSearchTextL();

   /**

    * Clears text in the search field.

    */

    IMPORT_C void ResetL();

   /**

    * Sets additional info text to the search field.

    * @param aText Reference to the text buffer.

    */

    IMPORT_C void SetInfoTextL( const TDesC& aText );

   /**

    * Calls editor's @c ClipboardL() function.

    * @param aClipboardFunc Clipboard function.

    */

    IMPORT_C void ClipboardL( CEikEdwin::TClipboardFunc aClipboardFunc );

   /**

    * Return search field style

    * @since 5.0

    * @return style of search field 

    */   

    IMPORT_C CAknSearchField::TSearchFieldStyle SearchFieldStyle() const;

public: // new methods for Avkon Skins support

   /**

    * Sets whether skins are enabled on this control. The default value is 

    * determined from global setting from @c CAknAppUi.

    * @since Series 60 2.0 

    * @param aEnabled @c ETrue if skins are enabled, @c EFalse if not.

    */

    IMPORT_C void SetSkinEnabledL( const TBool aEnabled );

public: // from MCoeControlObserver

   /**

    * From @c MCoeControlObserver, Acts upon changes in the hosted control's state.

    * This class's implementation is trivial and should be able to be safely 

    * re-implemented in directly client-derived classes. For non-base setting

    * page classes, a call to the base class should be made.

    * @param aControl Control that caused the event. (not used in default implementation)

    * @param aEventType Type of the event. 

    */

    void HandleControlEventL( CCoeControl* aControl,TCoeEvent aEventType );

public: // From CCoeControl

   /**

    * From @c CCoeControl, Handles key event.

    * @param aKeyEvent The key event. 

    * @param aType The type of the event.

    * @return Indicates whether the key event was used by this control or not.

    */

    IMPORT_C TKeyResponse OfferKeyEventL( const TKeyEvent& aKeyEvent,TEventCode aType );

   /**

    * From @c CCoeControl, Handles pointer event.

    * @since 5.0

    * @param aPointerEvent The pointer event. 

    *	Invert adaptive search grid by tapping search field.    

    */

    void HandlePointerEventL( const TPointerEvent& aPointerEvent );

   /**

    * From @c CCoeControl, Returns minimum size. Minimum size depends on 

    * zoom factor. 

    * @return Minimum size.

    */

    IMPORT_C TSize MinimumSize();

   /**

    * Sets this control as visible or invisible.

    *

    * @since S60 3.2

    * @param aVisible ETrue to make the control visible, EFalse to make

    *                 it invisible.

    */

    IMPORT_C void MakeVisible( TBool aVisible );

    /**

     * From @c CCoeControl, Resource change handling.

     *

     * @param aType Message type.

     */

    void HandleResourceChange( TInt aType );

public:

   /**

    * Sets position of the line on main pane.

    * @since Series 60 2.0

    * @param aLinePos The position as defined in @c TAknSeparatorLinePos

    */

    IMPORT_C void SetLinePos( TInt aLinePos );

   /**

    * Access to the edwin owned by the search field.

    * @since Series 60 2.6

    * @return Reference to the edwin owned by the search field.

    */

    IMPORT_C CEikEdwin& Editor() const;

   /**

    * Set adaptive search grid characters.

    * @since 5.0

    * @param aGridChars The characters for adaptive search grid.

    */

    IMPORT_C void SetAdaptiveGridChars( const TDesC& aGridChars ) const;

   /**

    * Show adaptive search grid. 

    * Application can activate adaptive search grid from the option menu.

    * @since 5.0

    */

    IMPORT_C void ShowAdaptiveSearchGrid() const;   

   /**

    * Set column filter flag for adaptive search grid  

    * @since 5.0

    * @param aFlag The bit flag shows which columns take into account

    * during filtering.

    */

    IMPORT_C void SetListColumnFilterFlags( const TBitFlags32 aFlag );

   /**

    * Send column filter flag for adaptive search grid  

    * @since 5.0

    * @return aFlag The bit flag shows which columns take into account

    * during filtering.

    */

    IMPORT_C TBitFlags32 ListColumnFilterFlags() const;

   /** 

    * Adds an adaptive search text observer. Duplicates are not checked 

    * (i.e. adding the same observer multiple times is not prevented). 

    * @since 5.0 

    * @param aObserver Must be non-NULL. 

    */ 

    IMPORT_C void AddAdaptiveSearchTextObserverL( MAdaptiveSearchTextObserver* aObserver );

   /** 

    * Removes an adaptive search text observer. 

    * @since 5.0 

    * @param aObserver The observer to be removed. 

    * @return ETrue if removal ok, EFalse if observer was not removed (not 

    * found from the list of observers). 

    */ 

    IMPORT_C TBool RemoveAdaptiveSearchTextObserver( MAdaptiveSearchTextObserver* aObserver );

   /** 

    * Returns information whether adaptive search is enabled or not

    * @since 5.0   

    * @return ETrue if adaptive search is enabled, EFalse otherwise.

    */ 

    IMPORT_C TBool AdaptiveSearchEnabled();

   /** 

    * Notify client if input language changed in settings, for adaptive search

    * @since 5.0       

    * @return ETrue if language has changed, EFalse otherwise.

    */

    IMPORT_C TBool LanguageChanged() const;

private: // from MObjectProvider

    TTypeUid::Ptr MopSupplyObject( TTypeUid aId );

private:

    TInt CountComponentControls() const;

    CCoeControl* ComponentControl( TInt aIndex ) const;

    void SizeChanged();

    void FocusChanged( TDrawNow aDrawNow );

private:

    void ConstructL( const CCoeControl& aParent, TSearchFieldStyle aFieldStyle, CGulIcon* aIcon, TInt aTextLimit );

    CAknSearchField(); 

private:

    void ZoomEditorL();

private: // from MEikCommandObserver

    IMPORT_C void ProcessCommandL( TInt aCommandId );

private:

    void UpdatePopupCBAL();

    void RestorePopupCBA();

    void SetupSkinContextL();

public:

   /**

    * Sets a list box for this control.

    * @since Series 60 2.6

    * @param aListBox A pointer to a list box object.

    */

    void SetListbox( CEikListBox* aListBox );

   /**

    * Sets the parent control for this control.

    * @since Series 60 2.6

    * @param aParent A pointer to the parent control.

    */

    void SetParentCtrl( CCoeControl* aParent );

   /**

    * Indicates that is the control popup or not.

    * @since Series 60 2.6

    * @return @c ETrue if it is a popup, @c EFalse if not.

    */

    TBool IsPopup();

   /**

    * Sets index, where listbox focus should return when popup findbox is

    * canceled.

    * @since Series 60 3.1

    * @internal

    */

    void SetOldItemIndex( TInt aOldItemIndex );

   /**

    * Returns index, where listbox focus should return when popup findbox is

    * canceled

    * @since Series 60 3.1

    * @internal

    */

    TInt OldItemIndex();

   /** 

    * Set the language changed flag, for adaptive search

    * @since 5.0       

    * @param aLanguageChanged ETrue if language has changed, EFalse otherwise.

    */

    void SetLanguageChangedFlag( TBool aLanguageChanged );

    /**

     * Handle HW keyboard active/deactive event.

     * @since 5.0

     */

    void HandleHWKeyboardModeChangeL();

    /**

     * A helper methord used in ContructL().

     * Get Adaptive Search setting and subscribe hardware 

     * keyboard layout changing.

     *

     * @param aShowIndicator, ETrue if indicator need be shown

     * @return ETrue if Adaptive is enabled in cenrep/

     * @since 5.0

     */

    TBool GetASStatusAndSubKbLayoutL( TBool& aShowIndicator );

private:	

    // The bit flag shows which collumns take into account during filltering  

    TBitFlags32 iColumnFlag;

    CEikEdwin* iEditor;   

    CGlobalText* iGlobalText;

    CAknInputFrame* iInputFrame;

    CAknSearchFieldIndicator* iIndicator; 

    CAknsListBoxBackgroundControlContext* iSkinContext;

    TInt iFlags;  

    TInt iLinePos;

    CAknsFrameBackgroundControlContext* iInputContext;

    TBool iIsPopup;

    TBool iCBAObserverUpdated;

    CEikListBox *iListBox; // not owned

    CCoeControl *iParent; // not owned

    CEikButtonGroupContainer *iCba; // this is only for checking whether cba changed 

    TInt iOldItemIndex;

    CAknAppUi* iBackedAppUi;

    CAknAdaptiveSearch* iAdaptiveSearch; 

    TSearchFieldStyle iStyle;    

    TBool iLanguageChanged; // flag shows was input language changed or not

    // For hybird keyborad

    RProperty iHwKeyboardPro;

    CHwKbSubscriber* iHwKbSub;

    };

#endif