/*

* Copyright (c) 1998 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:

*

*/

#include <eikbtgps.h>

const TUid KEikButtonGroupStackUid={0x10006015};

//

// class TBtGrpStackIter

//

class TBtGrpStackIter : public TDblQueIter<CEikButtonGroupContainer>

	{

public:

	TBtGrpStackIter(TDblQue<CEikButtonGroupContainer>& aList);

	};

TBtGrpStackIter::TBtGrpStackIter(TDblQue<CEikButtonGroupContainer>& aList)

	: TDblQueIter<CEikButtonGroupContainer>(aList)

	{

	SetToFirst();

	}

//

// class CEikButtonGroupStack

//

CEikButtonGroupContainer* CEikButtonGroupStack::Current()

	{ // static

	CEikButtonGroupContainer* ret=NULL;

	CEikButtonGroupStack* self=CEikButtonGroupStack::Self();

	if (self)

		{

		TBtGrpStackIter iter(self->iBtStack);

		CEikButtonGroupContainer* obj=NULL;

		TInt ordinalPos=KMinTInt;

		while ((obj=iter++)!=NULL)

			{

			if (obj->IsVisible())

				{

				const TInt winPos=obj->DrawableWindow()->OrdinalPosition();

				if (winPos>=0 && (winPos<ordinalPos || ordinalPos<0))

					{

					ordinalPos=winPos;

					ret=obj;

					}

				}

			}

		}

	return ret;

	}

/**

 * Returns the minimum size required by the button group stack.

 *

 * @since App-Framework_6.1 

 */

EXPORT_C TSize CEikButtonGroupStack::MinimumSize()

	{ // static

	TSize ret;

	CEikButtonGroupStack* self=CEikButtonGroupStack::Self();

	if (self)

		{

		TBtGrpStackIter iter(self->iBtStack);

		CEikButtonGroupContainer* obj=NULL;

		while ((obj=iter++)!=NULL)

			{

			if (obj->IsVisible())

				{

				const TSize size=obj->Size();

				ret.iHeight=Max(ret.iHeight,size.iHeight);

				ret.iWidth=Max(ret.iWidth,size.iWidth);

				}

			}

		}

	return ret;

	}

void CEikButtonGroupStack::AddL(CEikButtonGroupContainer& aGroup)

	{ // static

	CEikButtonGroupStack* self=CEikButtonGroupStack::Self();

	if (!self)

		{

		self=new(ELeave) CEikButtonGroupStack(); // CCoeEnv takes ownership immediately

		self->iBtStack.AddFirst(aGroup);

		}

	else

		self->iBtStack.AddLast(aGroup);

	}

void CEikButtonGroupStack::Remove(CEikButtonGroupContainer& aGroup)

	{ // static

	CEikButtonGroupStack* self=CEikButtonGroupStack::Self();

	if (self)

		{

		TBtGrpStackIter iter(self->iBtStack);

		CEikButtonGroupContainer* obj=NULL;

		while ((obj=iter++)!=NULL)

			{

			if ((TInt)obj==(TInt)&aGroup)

				{

				obj->iBtLink.Deque();

				break;

				}

			}

		}

	}

inline CEikButtonGroupStack::CEikButtonGroupStack()

	: CCoeStatic(KEikButtonGroupStackUid),

	 iBtStack(_FOFF(CEikButtonGroupContainer,iBtLink))

	{}

inline CEikButtonGroupStack* CEikButtonGroupStack::Self()

	{return STATIC_CAST(CEikButtonGroupStack*,CCoeEnv::Static(KEikButtonGroupStackUid));}