/*

* Copyright (c) 2000-2006 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:  Uikon legacy button that launches a menu when activated

*

*/

#if !defined(__EIKMNBUT_H__)

#define __EIKMNBUT_H__

#if !defined(__EIKMOBS_H__)

#include <eikmobs.h>

#endif										 

#if !defined(__EIKCMBUT_H__)

#include <eikcmbut.h>

#endif

class CEikMenuPane;

/**

 *  This class implements a command button that, when pressed, raises a Menu pane.

 *

 *  This class does NOT implement S60 look-and-feel and is not skinned.

 *

 *  @lib eikcoctl.dll

 *  @since S60 1.0

 */

class CEikMenuButton : public CEikCommandButton, private MEikMenuObserver

{

public:

    /**

    * C++ constructor

    */

    IMPORT_C CEikMenuButton();

    /**

    * destructor

    */

    IMPORT_C ~CEikMenuButton();

    /**

    * 2nd phase constructor using a MNBUT resource struct

    *

    * @param aReader    A constructed resource reader.

    */

    IMPORT_C void ConstructFromResourceL(TResourceReader& aReader);

    /**

    * Launch the related menu pane

    * 

    * @param aObserver Mandatory supplied menu observer pointer.

    */

    IMPORT_C void LaunchPopupMenuL(MEikMenuObserver* aObserver);

    /**

    * Set the menu pane id to be launched when the control is activated.

    * 

    * @param aMenuPaneId  Resource ID of the menu pane to be launched

    */

    IMPORT_C void SetMenuPaneId(TInt aMenuPaneId);

protected:

    /**

    * From CCoeControl

    *

    * Serialize the state of the control to the given stream

    *

    * @param aWriteStream   Stream to write to

    */

    IMPORT_C void WriteInternalStateL(RWriteStream& aWriteStream) const;

public: // from CEikButtonBase

    /**

    * Triggers the change of appearance of the button that is associated with the button being pressed

    */

    IMPORT_C void Animate();

public: // From CCoeControl

    /**

    * From CCoeControl

    *

    * Framework method called when a pointer event is found to be within this control's boundaries. 

    * The default implementation causes the associated menu to be presented to the screen.

    *

    * @param aPointerEvent  Pointer event to process

    */

    IMPORT_C void HandlePointerEventL(const TPointerEvent& aPointerEvent);

private: 

    /**

    * From MEikCommandObserver

    *

    * Framework method called to processs a command ID

    *

    * @param aCommandId ID of the command to respond to.

    */

    IMPORT_C void ProcessCommandL(TInt aCommandId);

    /**

    * From MEikMenuObserver

    *

    * Called by the Uikon framework to handle the emphasising or de-emphasising of 

    * a menu window. 

    * 

    * CEikMenuBar objects call this on their observer to emphasise 

    * themselves when they are displayed, and de-emphasise themselves when they 

    * stop displaying.

    * 

    * @param aMenuControl The menu control

    * @param aEmphasis ETrue to emphasize the menu, EFalse otherwise

    */

    IMPORT_C void SetEmphasis(CCoeControl* aMenuControl,TBool aEmphasis);

private:

    void ClosePopupMenu();

    void DoLaunchPopupMenuL();

private:

    /**

    * From CAknControl

    */

    IMPORT_C void* ExtensionInterface( TUid aInterface );

private:

    /**

    *  The object to receive the menu events

    *  Not Owned

    */

    MEikMenuObserver* iMenuObserver;

    /**

    * Holds a menu pane object to be popped up

    * Owned

    */

    CEikMenuPane* iMenuPopup;

    /**

    * Resource ID of the menu pane

    */

    TInt iMenuPaneId;

    TInt iSpare;

    };

#endif