/*

* Copyright (c) 2002-2009 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:  EIKON control group implementation.

*

*/

#include <eikctgrp.h>

#include <eikpanic.h>

#include <coedef.h>

#include <coeccntx.h>

#include <layoutmetadata.cdl.h>

#include <AknUtils.h> // LayoutUtils

#include <AknStatuspaneUtils.h>

#include <avkon.rsg>

const TInt KControlArrayGranularity = 5;

const TInt KStartCornerMask         = 0x00f;

const TInt KOrientationMask         = 0x030; 

EXPORT_C CEikControlGroup::CEikControlGroup()

	: iLines(1)

	{

	__DECLARE_NAME(_S("CEikControlGroup"));

	}

EXPORT_C CEikControlGroup::~CEikControlGroup()

	{

	DeleteAllComponents();

	delete iControlArray;

	}

EXPORT_C void CEikControlGroup::ConstructL(TStartCorner aStart,TOrientation aOrientation)

	{

	iControlArray=new(ELeave) CArrayFixFlat<TEikGroupControl> (KControlArrayGranularity);

	iLayout|=aStart|aOrientation;

	}

EXPORT_C void CEikControlGroup::AddControlL(CCoeControl* aControl,TInt aId)

	{

	TEikGroupControl ctrl;

	ctrl.iControl=aControl;

	ctrl.iId=aId;

	AddControlL(ctrl);

	}

EXPORT_C void CEikControlGroup::AddControlL(TEikGroupControl& aGroupControl)

	{

	__ASSERT_DEBUG(aGroupControl.iControl,Panic(EEikPanicNullPointer));

	aGroupControl.iControl->SetContainerWindowL(*this);

	iControlArray->AppendL(aGroupControl);

	}

EXPORT_C void CEikControlGroup::InsertControlL(TEikGroupControl& aGroupControl,TInt aIndex)

	{

	__ASSERT_DEBUG(aGroupControl.iControl,Panic(EEikPanicNullPointer));

	aGroupControl.iControl->SetContainerWindowL(*this);

	iControlArray->InsertL(aIndex,aGroupControl); // takes ownership at this point

	}

EXPORT_C void CEikControlGroup::DeleteControl(TInt aIndex,TInt aCount)

	{

	for (TInt ii=aIndex+aCount-1;ii>=aIndex;ii--)

		{

		delete (*iControlArray)[ii].iControl;

		iControlArray->Delete(ii);

		}

	}

EXPORT_C void CEikControlGroup::Reset()

	{

	DeleteAllComponents();

	iControlArray->Reset();

	}

EXPORT_C void CEikControlGroup::DeleteAllComponents()

	{

	if (iControlArray)

		{

		const TInt count=iControlArray->Count();

		for (TInt ii=0;ii<count;ii++)

			delete ((*iControlArray)[ii].iControl);

		}

	}

EXPORT_C TInt CEikControlGroup::IndexById(TInt aId) const

	{

	const TInt count=iControlArray->Count();

	for (TInt ii=0;ii<count;ii++)

		{

		if ((*iControlArray)[ii].iId==aId)

			return ii;

		}

	return KErrNotFound;

	}

EXPORT_C CCoeControl* CEikControlGroup::ControlById(TInt aId) const

	{

	const TInt index=IndexById(aId);

	if (index==KErrNotFound)

		return NULL;

	return (*iControlArray)[index].iControl;

	}

EXPORT_C TInt CEikControlGroup::ControlId(CCoeControl* aControl) const

	{

	const TInt count=iControlArray->Count();

	for (TInt ii=0;ii<count;ii++)

		{

		TEikGroupControl ctrl=(*iControlArray)[ii];

		if (ctrl.iControl==aControl)

			return ctrl.iId;

		}

	return KErrNotFound;

	}

EXPORT_C CCoeControl* CEikControlGroup::Control(TInt aIndex) const

	{

	return (*iControlArray)[aIndex].iControl;

	}

EXPORT_C CArrayFix<TEikGroupControl>* CEikControlGroup::ControlArray() const

	{

	return iControlArray;

	}

EXPORT_C void CEikControlGroup::SetControlsAllSameSize()

	{

	iLayout|=EAllSameSize;

	}

EXPORT_C void CEikControlGroup::Draw(const TRect& /*aRect*/) const

	{

	const TRect rect(Rect());

	CWindowGc& gc=SystemGc();

	iBorder.Draw(gc,rect);

	if (iContext)

		{

		gc.SetPenStyle(CGraphicsContext::ENullPen);

		iContext->PrepareContext(gc);

		gc.DrawRect(iBorder.InnerRect(rect));

		}

	}

EXPORT_C void CEikControlGroup::SetLengthInPixels(TInt aLength)

	{

	__ASSERT_DEBUG(aLength>=1,Panic(EEikPanicCtGroupInvalidDimension));

	iLength=aLength;

	if (Orientation()==ELayHorizontally)

		iSize.iWidth=aLength;

	else

		iSize.iHeight=aLength;

	}

EXPORT_C void CEikControlGroup::SetBreadthInPixels(TInt aBreadth)

	{

	__ASSERT_DEBUG(aBreadth>=1,Panic(EEikPanicCtGroupInvalidDimension));

	iBreadth=aBreadth;

	if (Orientation()==ELayHorizontally)

		iSize.iHeight=aBreadth;

	else

		iSize.iWidth=aBreadth;

	}

EXPORT_C void CEikControlGroup::SetNumberOfLines(TInt aNumLines,TBool aDistributeEvenly)

	{

	__ASSERT_DEBUG(aNumLines>=1,Panic(EEikPanicCtGroupInvalidNumberOfLines));

	iLines=aNumLines;

	if (aDistributeEvenly)

		iLayout|=EDistributeEvenly;

	else

		iLayout&=~EDistributeEvenly;

	}

EXPORT_C TSize CEikControlGroup::MinimumSize()

	{

	const TBool horiz=(Orientation()==ELayHorizontally);

	TSize size=(horiz? TSize(iLength,iBreadth) : TSize(iBreadth,iLength));

	if ((horiz && size.iWidth==0) || (!horiz && size.iHeight==0))

		{

		if (iLines==1)

			{

			const TInt count=iControlArray->Count();

			TInt length=0;

			if (AllSameSize())

				length=count*(horiz? iLargestControl.iWidth : iLargestControl.iHeight);

			else

				{

				for (TInt ii=0;ii<count;ii++)

					{

					const TSize ctrlSize=ControlMinimumSize(ii);

					length+=(horiz? ctrlSize.iWidth : ctrlSize.iHeight);

					}

				}

			if (horiz)

				size.iWidth=length+(count-1)*iHSpacing;

			else

				size.iHeight=length+(count-1)*iVSpacing;

			}

		else if (iLines>1 && iLayout&EDistributeEvenly)

			{

			const TInt count=iControlArray->Count();

			const TInt maxLineCount=(count+iLines-1)/iLines;

			TInt length=0;

			if (AllSameSize())

				length=maxLineCount*(horiz? iLargestControl.iWidth : iLargestControl.iHeight);

			else

				{

				TInt ii=-1;

				while (++ii<count)

					{

					if ((ii+1)%iLines && ii!=count-1)

						{

						const TSize ctrlSize=ControlMinimumSize(ii);

						length+=(horiz? ctrlSize.iWidth : ctrlSize.iHeight);

						}

					else

						{

						length=Max((horiz? size.iWidth : size.iHeight),length);

						length=0;

						}

					}

				}

			if (horiz)

				{

				size.iWidth=length;

				size.iWidth+=(maxLineCount-1)*iHSpacing;

				}

			else

				{

				size.iHeight=length;

				size.iHeight+=(maxLineCount-1)*iVSpacing;

				}

			}

		else

			Panic(EEikPanicCtGroupInsufficientInitialisation);

		if (horiz)

			size.iWidth+=iBorder.SizeDelta().iWidth;

		else

			size.iHeight+=iBorder.SizeDelta().iHeight;

		}

	if ((horiz && size.iHeight==0) || (!horiz && size.iWidth==0))

		{

		TInt breadth=0;

		if (AllSameSize())

			breadth=(horiz? iLargestControl.iHeight : iLargestControl.iWidth);

		else

			{

			const TInt count=iControlArray->Count();

			for (TInt ii=0;ii<count;ii++)

				{

				const TSize ctrlSize=ControlMinimumSize(ii);

				breadth=Max(breadth,(horiz? ctrlSize.iHeight : ctrlSize.iWidth));

				}

			}

		breadth*=iLines;

		if (horiz)

			size.iHeight=breadth+(iLines-1)*iVSpacing+iBorder.SizeDelta().iHeight;

		else

			size.iWidth=breadth+(iLines-1)*iHSpacing+iBorder.SizeDelta().iWidth;

		}

	return size;

	}

EXPORT_C TSize CEikControlGroup::ControlMinimumSize(TInt aIndex) const

	{

	TSize size;

	TEikGroupControl ctrl=(*iControlArray)[aIndex];

	if (Orientation()==ELayHorizontally)

		{

		TSize ctrlSize;

		if (ctrl.IsLengthSet())

			size.iWidth=ctrl.Length();

		else

			{

			ctrlSize=ctrl.iControl->MinimumSize();

			size.iWidth=ctrlSize.iWidth;

			}

		if (iBreadth==0)

			size.iHeight=(ctrlSize.iHeight>0? ctrlSize.iHeight : ctrl.iControl->MinimumSize().iHeight);

		else

			{

			size.iHeight=iBreadth;

			size.iHeight-=iBorder.SizeDelta().iHeight;

			size.iHeight/=iLines;

			}

		}

	else

		{

		TSize ctrlSize;

		if (ctrl.IsLengthSet())

			size.iHeight=ctrl.Length();

		else

			{

			ctrlSize=ctrl.iControl->MinimumSize();

			size.iHeight=ctrlSize.iHeight;

			}

		if (iBreadth==0)

			size.iWidth=(ctrlSize.iWidth>0? ctrlSize.iWidth : ctrl.iControl->MinimumSize().iWidth);

		else

			{

			size.iWidth=iBreadth;

			size.iWidth-=iBorder.SizeDelta().iWidth;

			size.iWidth/=iLines;

			}

		}

	return size;

	}

EXPORT_C TInt CEikControlGroup::ControlMinimumLength(TInt aIndex)

	{

	TEikGroupControl ctrl=(*iControlArray)[aIndex];

	if (AllSameSize())

		return (Orientation()==ELayHorizontally? iLargestControl.iWidth : iLargestControl.iHeight);

	if (ctrl.IsLengthSet())

		return ctrl.Length();

	if (Orientation()==ELayHorizontally)

		return ctrl.iControl->MinimumSize().iWidth;

	return ctrl.iControl->MinimumSize().iHeight;

	}

EXPORT_C TSize CEikControlGroup::LargestControlSize() const

	{

	TSize size;

	const TInt count=iControlArray->Count();

	for (TInt ii=0;ii<count;ii++)

		{

		const TSize ctrlSize=ControlMinimumSize(ii);

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

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

		}

	return size;

	}

EXPORT_C TInt CEikControlGroup::CountComponentControls() const

	{

    TInt count = iControlArray->Count();

	// This prevents MSK from drawing in landscape layouts.

	// Also MSK doesn't even need to be activated in landscape modes.

    if ( count == 4 )

        {   

        // Exception is made for idle flat status pane layouts,

        // in which the MSK is used also in landscape.

        TBool mskSupportedLscLayoutActive(

            AVKONENV->StatusPaneResIdForCurrentLayout(

                AknStatuspaneUtils::CurrentStatusPaneLayoutResId() ) ==

                    R_AVKON_WIDESCREEN_PANE_LAYOUT_IDLE_FLAT_NO_SOFTKEYS );

        if ( iLayout & EDisableMSKDrawing ||

             ( Layout_Meta_Data::IsLandscapeOrientation() && 

               !mskSupportedLscLayoutActive ) )

            {

            count--;

            }

        }

	return count;

	}

EXPORT_C CCoeControl* CEikControlGroup::ComponentControl(TInt aIndex) const

	{

	return (*iControlArray)[aIndex].iControl;

	}

void CEikControlGroup::SetMSKVisibility(TBool aEnable)

    {

    if (!aEnable)

        {

        iLayout|=EDisableMSKDrawing;

        }

    else

        {

        iLayout&=~EDisableMSKDrawing;

        }

    }

EXPORT_C void CEikControlGroup::ControlSpacing(TInt& aHSpacing,TInt& aVSpacing) const

	{

	aHSpacing=iHSpacing;

	aVSpacing=iVSpacing;

	}

EXPORT_C void CEikControlGroup::SetControlSpacing(TInt aHSpacing,TInt aVSpacing)

	{

	iHSpacing=aHSpacing;

	iVSpacing=aVSpacing;

	}

EXPORT_C void CEikControlGroup::SetControlLayout(TStartCorner aStart,TOrientation aOrientation)

	{

	iLayout&=~KStartCornerMask;

	iLayout&=~KOrientationMask;

	iLayout|=aStart|aOrientation;

	}

EXPORT_C void CEikControlGroup::SizeChanged()

	{

	LayoutControls();

	}

EXPORT_C void CEikControlGroup::LayoutControls()

	{

	const TBool horiz=Orientation()==ELayHorizontally;

	const TRect inner=iBorder.InnerRect(Rect());

	TInt lineBreadth=0;

	if (horiz)

		lineBreadth=(inner.Height()-(iLines-1)*iVSpacing)/iLines;

	else

		lineBreadth=(inner.Width()-(iLines-1)*iHSpacing)/iLines;

	const TInt count=iControlArray->Count();

	TInt ctrlsInLine=(DistributeEvenly()? (count+iLines-1)/iLines : 0);

	TInt index=0;

	TPoint ctrlPos=inner.iTl;

	TStartCorner startCorner=StartCorner();

	for (TInt ii=0;ii<iLines && index<count;ii++)

		{

		TInt excess=0;

		TInt length=(iLength? iLength-(horiz? iBorder.SizeDelta().iWidth : iBorder.SizeDelta().iHeight) :

							(horiz? inner.Width() : inner.Height()));

		if (DistributeEvenly())

			{

			if (ii==iLines-1)

				ctrlsInLine=count-(ctrlsInLine*ii);

			else

				ctrlsInLine=Min(ctrlsInLine,count-index);

			TInt ctrlsLength=0;

			for (TInt jj=0;jj<ctrlsInLine && index+jj<=count;jj++)

				{

				if (index+jj==count)

					{

					ctrlsInLine=jj;

					break;

					}

				ctrlsLength+=ControlMinimumLength(index+jj);

				}

			ctrlsLength+=(ctrlsInLine-1)*(horiz? iHSpacing : iVSpacing);

			excess=length-ctrlsLength;

			}

		else

			{

			ctrlsInLine=0;

			TInt jj=index;

			TInt ctrlsLength=0;

			const TInt spacing=(horiz? iHSpacing : iVSpacing);

			if (index<count)

				{

				FOREVER

					{

					const TInt ctrlLength=ControlMinimumLength(jj++)+(ctrlsInLine? spacing : 0);

					if (ctrlLength+ctrlsLength<=length)

						{

						ctrlsLength+=ctrlLength;

						++ctrlsInLine;

						if (jj==count)

							break;

						}

					else

						break;

					}

				excess=length-ctrlsLength;

				}

			}

		TInt stretchable=0;

		for (TInt jj=0;jj<ctrlsInLine;jj++)

			{

			if ((*iControlArray)[index+jj].IsStretchable())

				++stretchable;

			}

		switch (startCorner)

			{

		case EFromTopLeft:

			ctrlPos=inner.iTl;

			if (horiz)

				ctrlPos.iY+=ii*(lineBreadth+iVSpacing);

			else

				ctrlPos.iX+=ii*(lineBreadth+iHSpacing);

			break;

		case EFromTopRight:

			ctrlPos.iX=inner.iBr.iX;

			ctrlPos.iY=inner.iTl.iY;

			if (horiz)

				{

				ctrlPos.iX-=ControlMinimumLength(index);

				ctrlPos.iY+=ii*(lineBreadth+iVSpacing);

				}

			else

				ctrlPos.iX-=lineBreadth+(ii*(lineBreadth+iHSpacing));

			break;

		case EFromBottomLeft:

			ctrlPos.iX=inner.iTl.iX;

			ctrlPos.iY=inner.iBr.iY;

			if (horiz)

				ctrlPos.iY-=(lineBreadth+(ii*(lineBreadth+iVSpacing)));

			else

				{

				ctrlPos.iX+=ii*(lineBreadth+iHSpacing);

				ctrlPos.iY-=ControlMinimumLength(index);

				}

			break;

		case EFromBottomRight:

			ctrlPos=inner.iBr;

			if (horiz)

				{

				ctrlPos.iX-=ControlMinimumLength(index);

				ctrlPos.iY-=(lineBreadth+(ii*(lineBreadth+iVSpacing)));

				}

			else

				{

				ctrlPos.iX-=lineBreadth+(ii*(lineBreadth+iHSpacing));

				ctrlPos.iY-=ControlMinimumLength(index);

				}

			break;

			}

		TInt stretched=0;

		for (TInt kk=index;kk<ctrlsInLine+index;kk++)