/*

* Copyright (c) 1997-1999 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 <gulbordr.h>

#include <gulcolor.h>

#include <gulutil.h>

#include <coecntrl.h>

#include "LAFSCRLB.H"

#include "LAFSTD.H"

#include "lafmain.h"

#include "lafcommn.h"

//

// Class LafScrollBar

//

const TInt KLafScrollBarMinThumbLength=16;

const TInt KLafScrollBarBorderWidth=1;

const TInt KLafScrollBarDefaultBreadth = 23;

EXPORT_C TInt LafScrollBar::Constant(TConstantType aConstant)

	{

	TInt retVal=0;

	switch(aConstant)

		{

	case EMinimumThumbLen:

		retVal=KLafScrollBarMinThumbLength;

		break;

	case EDefaultFlags:

		retVal=0;

		break;

	case EDefaultBreadth:

		retVal=KLafScrollBarDefaultBreadth;

		break;

	case EBorderWidth:

		retVal=KLafScrollBarBorderWidth;

		break;

	case EDefaultButtonPositionFlags:

		retVal=SLafScrollBar::EButtonsAtEndOfShaft;

		break;

	default:

		__ASSERT_DEBUG(EFalse,Panic(ELafPanicConstantNotKnown));

		break;

		}

	return retVal;

	}

/**

 * Gets the default border for the matched control in aBorder. Called from the constructor of the matched control.

 */

EXPORT_C void LafScrollBar::GetDefaultBorder(TGulBorder& aBorder)

	{

	aBorder=TGulBorder(TGulBorder::ESingleBlack);

	}

/**

 * Gets the set of border colors for the matched control in aBorderColors. The RGB values of the colors obtained

 * may depend on the the display mode, the environment color list and the instance of the

 * matched control aMatchedControl. Called by the matched control from its Draw() method and passed on to the

 * Draw() method of TGulBorder. 

 */

EXPORT_C void LafScrollBar::GetBorderColors(TGulBorder::TColors& aBorderColors, const MLafEnv& aLafEnv, const CCoeControl& aMatchedControl)

	{

	LafCommonUtils::GetRgbDerivedBorderColors( aBorderColors,

			EColorScrollBarShaft, aLafEnv,aMatchedControl );

	}

EXPORT_C void LafScrollBar::DrawHighlightedShaftArea(const MLafEnv& aLafEnv, const CCoeControl& aScrollBar, CWindowGc& aGc, TRect& aArea, TBool aIsHighlighted,

													 TInt /*aThumbPos*/, TInt /*aThumbLength*/, TBool /*aHorizontal*/)

	{//static

	TRgb color= aLafEnv.ControlColor((aIsHighlighted? EColorScrollBarShaftPressed : EColorScrollBarShaft), aScrollBar);

	aGc.SetBrushColor(color);

	aGc.Clear(aArea);

	}

/**

* Draws the shaft only for scrollbars with 'no thumb' or 'no thumb and no shaft'.

*/

EXPORT_C void LafScrollBar::DrawShaft(const MLafEnv& aLafEnv,const CCoeControl& aScrollBar,CWindowGc& aGc,const TRect& aRect,TInt aScrollBarDisplayFlags,TBool /*aHorizontal*/)

	{

	if (aScrollBarDisplayFlags&SLafScrollBar::EEikScrollBarNoShaftOrThumb)

		{

		aGc.SetBrushColor(aLafEnv.ControlColor(EColorScrollBarNoShaftOrThumb, aScrollBar)); //KEikScrollBarNoShaftOrThumbColor);

		aGc.Clear(aRect);

		}

	else if (aScrollBarDisplayFlags&SLafScrollBar::EEikScrollBarShaftButNoThumb)

		{

		const TRgb shaftColor= aLafEnv.ControlColor((aScrollBar.IsDimmed()? EColorScrollBarShaftDimmed : EColorScrollBarShaft),aScrollBar);

		aGc.SetBrushColor(shaftColor);

		aGc.Clear(aRect);

		}

	}

/**

* Draws the piece of shaft before and after the thumb the first time that the scrollbar is drawn. 

* The function RedrawShaft() draws the shaft subsequently.

*

*/

EXPORT_C void LafScrollBar::DrawShaftAroundThumb(const MLafEnv& aLafEnv,const CCoeControl& aScrollBar,CWindowGc& aGc,const TRect& aShaftRect,TBool aHorizontal,TInt aThumbPos,TInt aThumbLength)

	{

	const TRgb shaftColor= aLafEnv.ControlColor((aScrollBar.IsDimmed()? EColorScrollBarShaftDimmed : EColorScrollBarShaft),aScrollBar);

	// draw shaft before thumb

	TRect rect=aShaftRect;

	TInt& endOfShaftBeforeThumb=(aHorizontal)? rect.iBr.iX : rect.iBr.iY;

	endOfShaftBeforeThumb=aThumbPos;

	aGc.SetBrushColor(shaftColor);

	aGc.Clear(rect);

	// draw shaft after thumb

	rect=aShaftRect;

	TInt& startOfShaftAfterThumb=(aHorizontal)? rect.iTl.iX : rect.iTl.iY;

	startOfShaftAfterThumb=aThumbPos+aThumbLength;

	aGc.SetBrushColor(shaftColor);

	aGc.Clear(rect);

	}

/**

 * This function redraws the piece of the shaft which was previously 

 * covered by the thumb before a thumb drag event has taken place. The

 * rectangle aRect contains the region to be redrawn. The integer

 * aShaftStart is where the first part of the shaft meets the thumb, 

 * and aShaftEnd, the points where the second part of the shaft meets the thumb.

 */

EXPORT_C void LafScrollBar::RedrawShaft(const MLafEnv& aLafEnv,const CCoeControl& aScrollBar,CWindowGc& aGc, const TRect& aRect,TInt aShaftStart,TInt aShaftEnd,TBool aHorizontal)

	{

	TRect rect=aRect;

	TRgb shaftColor=aLafEnv.ControlColor((aScrollBar.IsDimmed()? EColorScrollBarShaftDimmed : EColorScrollBarShaft),aScrollBar);

	aGc.SetPenColor(aLafEnv.ControlColor(EColorScrollBarBorder,aScrollBar));

	// first check endpoints

	if(!IsBorderOutsideButtons())

		{

		if (aHorizontal)

			{

			if (rect.iTl.iX==aShaftStart)

				{

				aGc.DrawLine(rect.iTl, TPoint(rect.iTl.iX, rect.iBr.iY));

				rect.iTl.iX++;

				}

			if (rect.iBr.iX==aShaftEnd)

				{

				aGc.DrawLine(TPoint(rect.iBr.iX-1, rect.iTl.iY), TPoint(rect.iBr.iX-1, rect.iBr.iY));

				rect.iBr.iX--;

				}

			}

		else

			{

			if (rect.iTl.iY==aShaftStart)

				{

				aGc.DrawLine(rect.iTl, TPoint(rect.iBr.iX, rect.iTl.iY));

				rect.iTl.iY++;

				}

			if (rect.iBr.iY==aShaftEnd)

				{

				aGc.DrawLine(TPoint(rect.iTl.iX, rect.iBr.iY-1), TPoint(rect.iBr.iX, rect.iBr.iY-1));

				rect.iBr.iY--;

				}

			}

		}

	aGc.SetBrushColor(shaftColor);

	aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

	aGc.Clear(rect);

	}

EXPORT_C TInt LafScrollBar::CalcThumbPosInScrollBar(TInt aShaftStart, TInt aShaftEnd,

		TInt aThumbLength,TInt aModelThumbPos,TInt aModelScrollSpan,TInt aModelThumbSpan )

	{

	TInt ret=aShaftStart;

	const TInt scrollRange=aModelScrollSpan-aModelThumbSpan;

	if (scrollRange<=0)

		return ret;

	const TInt maxRet=aShaftEnd-aThumbLength;

	if (scrollRange>0)

		ret+=aModelThumbPos*(maxRet-aShaftStart)/scrollRange;

	if (ret>maxRet)

		ret=maxRet;

	return ret;

	}

EXPORT_C TInt LafScrollBar::CalcThumbPosInScrollBarModel(TInt aShaftStart, TInt aShaftEnd,

		TInt aThumbLength,TInt aThumbPos,TInt aModelScrollSpan,TInt aModelThumbSpan )

	{

	TInt ret=0;

	const TInt scrollRange=aShaftEnd-aShaftStart-aThumbLength;

	if (scrollRange<=0)

		return ret;

	TInt maxRet=aModelScrollSpan-aModelThumbSpan;

	ret=(((aThumbPos-aShaftStart)<<1)*maxRet+scrollRange)/(scrollRange<<1);

	if (ret>maxRet)

		ret=maxRet;

	return ret;

	}

EXPORT_C void LafScrollBar::GetColorUseListL(CArrayFix<TCoeColorUse>& aColorUseList)

	{ // static

	TInt commonAttributes = TCoeColorUse::ESurrounds|TCoeColorUse::ENormal|TCoeColorUse::ENeutral;

	TCoeColorUse colorUse;

	colorUse.SetLogicalColor(EColorScrollBarBorder);

	colorUse.SetUse(TCoeColorUse::EFore|TCoeColorUse::EActive|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollBarShaft);

	colorUse.SetUse(TCoeColorUse::EBack|TCoeColorUse::EActive|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollBarShaftDimmed);

	colorUse.SetUse(TCoeColorUse::EBack|TCoeColorUse::EDimmed|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollBarShaftPressed);

	colorUse.SetUse(TCoeColorUse::EBack|TCoeColorUse::EPressed|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollBarNoShaftOrThumb);

	colorUse.SetUse(TCoeColorUse::EBack|TCoeColorUse::EActive|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollButtonIcon);

	colorUse.SetUse(TCoeColorUse::EFore|TCoeColorUse::EActive|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollButtonIconPressed);

	colorUse.SetUse(TCoeColorUse::EFore|TCoeColorUse::EPressed|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollButtonIconDimmed);

	colorUse.SetUse(TCoeColorUse::EFore|TCoeColorUse::EActive|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollThumbDimmed);

	colorUse.SetUse(TCoeColorUse::EBack|TCoeColorUse::EDimmed|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollButtonThumbBackground);

	colorUse.SetUse(TCoeColorUse::EBack|TCoeColorUse::EActive|commonAttributes);

	aColorUseList.AppendL(colorUse);

	colorUse.SetLogicalColor(EColorScrollButtonThumbBackgroundPressed);

	colorUse.SetUse(TCoeColorUse::EBack|TCoeColorUse::EPressed|commonAttributes);

	aColorUseList.AppendL(colorUse);

	}

/**

 * Returns ETrue if the current position is not within the drag range from the scrollbar

 *

 * @since App-Framework_6.1

 */

EXPORT_C TBool LafScrollBar::IsPointerOutOfDragRange(const TPoint& /*aPointerPosition*/,const TRect& /*aScrollBarRect*/,TBool /*aHorizontal*/)

	{

	return EFalse;

	}

/**

 * Returns ETrue if the border of the scroll bar goes around the outside of the scroll

 * buttons.  Returns EFalse if the border is inside the scroll buttons

 * (ie. only surrounding the scroll bar shaft)

 *

 * @since App-Framework_6.1

 */

EXPORT_C TBool LafScrollBar::IsBorderOutsideButtons()

	{

	return EFalse;

	}

EXPORT_C TInt LafScrollBar::CalculateThumbLength(TInt aShaftLength,TInt aModelScrollSpan,

		TInt aModelThumbSpan)

	{

	TInt thumbLength=aShaftLength;

	const TInt scrollRange=aModelScrollSpan-aModelThumbSpan;

	if (scrollRange>0 && aModelScrollSpan)

		{

		thumbLength*=aModelThumbSpan;

		thumbLength/=aModelScrollSpan;

		}

	if (thumbLength<KLafScrollBarMinThumbLength)

		thumbLength=KLafScrollBarMinThumbLength;

	return thumbLength;

	}

/**

 * Method which modifies the size (aSize) and position (aPosition) of a scroll button

 * (of aButtonType) in the case where the border of the scroll bar draws into area which

 * used to belong to the buttons.  Other required parameters are aScrollBarFlags, aHorizontal

 * and aMargins which are all obvious properties of the matched class.

 *

 * @since App-Framework_6.1

 */

EXPORT_C void LafScrollBar::AdjustButtonExtentForScrollBarBorder(TPoint& /*aPosition*/,TSize& /*aSize*/,TInt /*aButtonType*/,TInt /*aScrollBarFlags*/, TBool /*aHorizontal*/, const TMargins& /*aMargins*/)

	{

	}

/**

 * Method which modifies the shaft start (aShaftStart) and shaft end (aShaftEnd) parameters

 * of a scroll button (of aButtonType) in the case were the border of the scroll bar draws

 * into area which used to belong to the buttons. Other required parameters are aScrollBarFlags, aHorizontal

 * and aMargins which are all obvious properties of the matched class.

 *

 * @since App-Framework_6.1

 */

EXPORT_C void LafScrollBar::AdjustShaftRangeForScrollBarBorder(TInt& /*aShaftStart*/,TInt& /*aShaftEnd*/,TBool /*aHorizontal*/,TInt /*aScrollBarFlags*/,const TMargins& /*aMargins*/)

	{

	}

//

// Class LafArrowHeadScrollBar

//

/**

 * Gets the default border for the matched control in aBorder. Called from the constructor of the matched control.

 */

EXPORT_C void LafArrowHeadScrollBar::GetDefaultBorder(TGulBorder& aBorder)

	{

	aBorder=TGulBorder(TGulBorder::ENone);

	}

/**

 * Gets the set of border colors for the matched control in aBorderColors. The RGB values of the colors obtained

 * may depend on the the display mode, the environment color list and the instance of the

 * matched control aMatchedControl. Called by the matched control from its Draw() method and passed on to the

 * Draw() method of TGulBorder. 

 */

EXPORT_C void LafArrowHeadScrollBar::GetBorderColors(TGulBorder::TColors& aBorderColors, const MLafEnv& aLafEnv, const CCoeControl& aMatchedControl)

	{

	LafCommonUtils::GetRgbDerivedBorderColors( aBorderColors,

			EColorScrollBarShaft, aLafEnv,aMatchedControl );

	}