/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_vcl.hxx"

#ifndef _SV_RC_H
#include <tools/rc.h>
#endif
#include <vcl/event.hxx>
#include <vcl/decoview.hxx>
#include <vcl/slider.hxx>



// =======================================================================

static long ImplMulDiv( long nNumber, long nNumerator, long nDenominator )
{
	double n = ((double)nNumber * (double)nNumerator) / (double)nDenominator;
	return (long)n;
}

// =======================================================================

#define SLIDER_DRAW_THUMB			((sal_uInt16)0x0001)
#define SLIDER_DRAW_CHANNEL1		((sal_uInt16)0x0002)
#define SLIDER_DRAW_CHANNEL2		((sal_uInt16)0x0004)
#define SLIDER_DRAW_CHANNEL 		(SLIDER_DRAW_CHANNEL1 | SLIDER_DRAW_CHANNEL2)
#define SLIDER_DRAW_ALL 			(SLIDER_DRAW_THUMB | SLIDER_DRAW_CHANNEL)

#define SLIDER_STATE_CHANNEL1_DOWN	((sal_uInt16)0x0001)
#define SLIDER_STATE_CHANNEL2_DOWN	((sal_uInt16)0x0002)
#define SLIDER_STATE_THUMB_DOWN 	((sal_uInt16)0x0004)

#define SLIDER_THUMB_SIZE			9
#define SLIDER_THUMB_HALFSIZE		4
#define SLIDER_CHANNEL_OFFSET		0
#define SLIDER_CHANNEL_SIZE 		4
#define SLIDER_CHANNEL_HALFSIZE 	2

#define SLIDER_HEIGHT				16

#define SLIDER_VIEW_STYLE			(WB_3DLOOK | WB_HORZ | WB_VERT)

// =======================================================================

void Slider::ImplInit( Window* pParent, WinBits nStyle )
{
	mnThumbPixOffset	= 0;
	mnThumbPixRange 	= 0;
	mnThumbPixPos		= 0;	// between mnThumbPixOffset and mnThumbPixOffset+mnThumbPixRange
	mnChannelPixOffset	= 0;
	mnChannelPixRange	= 0;
	mnChannelPixTop 	= 0;
	mnChannelPixBottom	= 0;

	mnMinRange			= 0;
	mnMaxRange			= 100;
	mnThumbPos			= 0;
	mnLineSize			= 1;
	mnPageSize			= 1;
	mnDelta 			= 0;
	mnDragDraw			= 0;
	mnStateFlags		= 0;
	meScrollType		= SCROLL_DONTKNOW;
	mbCalcSize			= sal_True;
	mbFullDrag			= sal_True;

	Control::ImplInit( pParent, nStyle, NULL );

	ImplInitSettings();
	SetSizePixel( CalcWindowSizePixel() );
}

// -----------------------------------------------------------------------

Slider::Slider( Window* pParent, WinBits nStyle ) :
	Control( WINDOW_SLIDER )
{
	ImplInit( pParent, nStyle );
}

// -----------------------------------------------------------------------

Slider::Slider( Window* pParent, const ResId& rResId ) :
	Control( WINDOW_SLIDER )
{
	rResId.SetRT( RSC_SCROLLBAR );
	WinBits nStyle = ImplInitRes( rResId );
	ImplInit( pParent, nStyle );
	ImplLoadRes( rResId );

	if ( !(nStyle & WB_HIDE) )
		Show();
}

// -----------------------------------------------------------------------

void Slider::ImplLoadRes( const ResId& rResId )
{
	Control::ImplLoadRes( rResId );

	sal_Int16 nMin			= ReadShortRes();
	sal_Int16 nMax			= ReadShortRes();
	sal_Int16 nThumbPos		= ReadShortRes();
	sal_Int16 nPage			= ReadShortRes();
	sal_Int16 nStep			= ReadShortRes();
	/* sal_Int16 nVisibleSize	= */ ReadShortRes();

	SetRange( Range( nMin, nMax ) );
	SetLineSize( nStep );
	SetPageSize( nPage );
	SetThumbPos( nThumbPos );
}

// -----------------------------------------------------------------------

void Slider::ImplInitSettings()
{
	Window* pParent = GetParent();
	if ( pParent->IsChildTransparentModeEnabled() && !IsControlBackground() )
	{
		EnableChildTransparentMode( sal_True );
		SetParentClipMode( PARENTCLIPMODE_NOCLIP );
		SetPaintTransparent( sal_True );
		SetBackground();
	}
	else
	{
		EnableChildTransparentMode( sal_False );
		SetParentClipMode( 0 );
		SetPaintTransparent( sal_False );

		if ( IsControlBackground() )
			SetBackground( GetControlBackground() );
		else
			SetBackground( pParent->GetBackground() );
	}
}

// -----------------------------------------------------------------------

void Slider::ImplUpdateRects( sal_Bool bUpdate )
{
	Rectangle aOldThumbRect = maThumbRect;
	bool bInvalidateAll = false;

	if ( mnThumbPixRange )
	{
		if ( GetStyle() & WB_HORZ )
		{
			maThumbRect.Left()		= mnThumbPixPos-SLIDER_THUMB_HALFSIZE;
			maThumbRect.Right() 	= maThumbRect.Left()+SLIDER_THUMB_SIZE-1;
			if ( mnChannelPixOffset < maThumbRect.Left() )
			{
				maChannel1Rect.Left()	= mnChannelPixOffset;
				maChannel1Rect.Right()	= maThumbRect.Left()-1;
				maChannel1Rect.Top()	= mnChannelPixTop;
				maChannel1Rect.Bottom() = mnChannelPixBottom;
			}
			else
				maChannel1Rect.SetEmpty();
			if ( mnChannelPixOffset+mnChannelPixRange-1 > maThumbRect.Right() )
			{
				maChannel2Rect.Left()	= maThumbRect.Right()+1;
				maChannel2Rect.Right()	= mnChannelPixOffset+mnChannelPixRange-1;
				maChannel2Rect.Top()	= mnChannelPixTop;
				maChannel2Rect.Bottom() = mnChannelPixBottom;
			}
			else
				maChannel2Rect.SetEmpty();
			
			const Rectangle aControlRegion( Rectangle( Point(0,0), Size( SLIDER_THUMB_SIZE, 10 ) ) );
			Rectangle aThumbBounds, aThumbContent;
            if ( GetNativeControlRegion( CTRL_SLIDER, PART_THUMB_HORZ,
                                         aControlRegion, 0, ImplControlValue(), rtl::OUString(),
                                         aThumbBounds, aThumbContent ) )
            {
                maThumbRect.Left() = mnThumbPixPos - aThumbBounds.GetWidth()/2;
                maThumbRect.Right() = maThumbRect.Left() + aThumbBounds.GetWidth() - 1;
                bInvalidateAll = true;
            }
		}
		else
		{
			maThumbRect.Top()		= mnThumbPixPos-SLIDER_THUMB_HALFSIZE;
			maThumbRect.Bottom()	= maThumbRect.Top()+SLIDER_THUMB_SIZE-1;
			if ( mnChannelPixOffset < maThumbRect.Top() )
			{
				maChannel1Rect.Top()	= mnChannelPixOffset;
				maChannel1Rect.Bottom() = maThumbRect.Top()-1;
				maChannel1Rect.Left()	= mnChannelPixTop;
				maChannel1Rect.Right()	= mnChannelPixBottom;
			}
			else
				maChannel1Rect.SetEmpty();
			if ( mnChannelPixOffset+mnChannelPixRange-1 > maThumbRect.Bottom() )
			{
				maChannel2Rect.Top()	= maThumbRect.Bottom()+1;
				maChannel2Rect.Bottom() = mnChannelPixOffset+mnChannelPixRange-1;
				maChannel2Rect.Left()	= mnChannelPixTop;
				maChannel2Rect.Right()	= mnChannelPixBottom;
			}
			else
				maChannel2Rect.SetEmpty();

			const Rectangle aControlRegion( Rectangle( Point(0,0), Size( 10, SLIDER_THUMB_SIZE ) ) );
			Rectangle aThumbBounds, aThumbContent;
            if ( GetNativeControlRegion( CTRL_SLIDER, PART_THUMB_VERT,
                                         aControlRegion, 0, ImplControlValue(), rtl::OUString(),
                                         aThumbBounds, aThumbContent ) )
            {
                maThumbRect.Top() = mnThumbPixPos - aThumbBounds.GetHeight()/2;
                maThumbRect.Bottom() = maThumbRect.Top() + aThumbBounds.GetHeight() - 1;
                bInvalidateAll = true;
            }
		}
	}
	else
	{
		maChannel1Rect.SetEmpty();
		maChannel2Rect.SetEmpty();
		maThumbRect.SetEmpty();
	}

	if ( bUpdate )
	{
		if ( aOldThumbRect != maThumbRect )
		{
		    if( bInvalidateAll )
		        Invalidate();
		    else
		    {
                Region aInvalidRegion( aOldThumbRect );
                aInvalidRegion.Union( maThumbRect );
                
                if( !IsBackground() && GetParent() )
                {
                    const Point aPos( GetPosPixel() );
                    aInvalidRegion.Move( aPos.X(), aPos.Y() );
                    GetParent()->Invalidate( aInvalidRegion, INVALIDATE_TRANSPARENT | INVALIDATE_UPDATE );
                }
                else
                    Invalidate( aInvalidRegion );
            }
		}
	}
}

// -----------------------------------------------------------------------

long Slider::ImplCalcThumbPos( long nPixPos )
{
	// Position berechnen
	long nCalcThumbPos;
	nCalcThumbPos = ImplMulDiv( nPixPos-mnThumbPixOffset, mnMaxRange-mnMinRange, mnThumbPixRange-1 );
	nCalcThumbPos += mnMinRange;
	return nCalcThumbPos;
}

// -----------------------------------------------------------------------

long Slider::ImplCalcThumbPosPix( long nPos )
{
	// Position berechnen
	long nCalcThumbPos;
	nCalcThumbPos = ImplMulDiv( nPos-mnMinRange, mnThumbPixRange-1, mnMaxRange-mnMinRange );
	// Am Anfang und Ende des Sliders versuchen wir die Anzeige korrekt
	// anzuzeigen
	if ( !nCalcThumbPos && (mnThumbPos > mnMinRange) )
		nCalcThumbPos = 1;
	if ( nCalcThumbPos &&
		 (nCalcThumbPos == mnThumbPixRange-1) &&
		 (mnThumbPos < mnMaxRange) )
		nCalcThumbPos--;
	return nCalcThumbPos+mnThumbPixOffset;
}

// -----------------------------------------------------------------------

void Slider::ImplCalc( sal_Bool bUpdate )
{
	sal_Bool bInvalidateAll = sal_False;

	if ( mbCalcSize )
	{
		long nOldChannelPixOffset	= mnChannelPixOffset;
		long nOldChannelPixRange	= mnChannelPixRange;
		long nOldChannelPixTop		= mnChannelPixTop;
		long nOldChannelPixBottom	= mnChannelPixBottom;
		long nCalcWidth;
		long nCalcHeight;

		maChannel1Rect.SetEmpty();
		maChannel2Rect.SetEmpty();
		maThumbRect.SetEmpty();

		Size aSize = GetOutputSizePixel();
		if ( GetStyle() & WB_HORZ )
		{
			nCalcWidth			= aSize.Width();
			nCalcHeight 		= aSize.Height();
			maThumbRect.Top()	= 0;
			maThumbRect.Bottom()= aSize.Height()-1;
		}
		else
		{
			nCalcWidth			= aSize.Height();
			nCalcHeight 		= aSize.Width();
			maThumbRect.Left()	= 0;
			maThumbRect.Right() = aSize.Width()-1;
		}

		if ( nCalcWidth >= SLIDER_THUMB_SIZE )
		{
			mnThumbPixOffset	= SLIDER_THUMB_HALFSIZE;
			mnThumbPixRange 	= nCalcWidth-(SLIDER_THUMB_HALFSIZE*2);
			mnThumbPixPos		= 0;
			mnChannelPixOffset	= SLIDER_CHANNEL_OFFSET;
			mnChannelPixRange	= nCalcWidth-(SLIDER_CHANNEL_OFFSET*2);
			mnChannelPixTop 	= (nCalcHeight/2)-SLIDER_CHANNEL_HALFSIZE;
			mnChannelPixBottom	= mnChannelPixTop+SLIDER_CHANNEL_SIZE-1;
		}
		else
		{
			mnThumbPixRange = 0;
			mnChannelPixRange = 0;
		}

		if ( (nOldChannelPixOffset != mnChannelPixOffset) ||
			 (nOldChannelPixRange != mnChannelPixRange) ||
			 (nOldChannelPixTop != mnChannelPixTop) ||
			 (nOldChannelPixBottom != mnChannelPixBottom) )
			bInvalidateAll = sal_True;

		mbCalcSize = sal_False;
	}

	if ( mnThumbPixRange )
		mnThumbPixPos = ImplCalcThumbPosPix( mnThumbPos );

	if ( bUpdate && bInvalidateAll )
	{
		Invalidate();
		bUpdate = sal_False;
	}
	ImplUpdateRects( bUpdate );
}

// -----------------------------------------------------------------------

void Slider::ImplDraw( sal_uInt16 nDrawFlags )
{
	DecorationView			aDecoView( this );
	sal_uInt16					nStyle;
	const StyleSettings&	rStyleSettings = GetSettings().GetStyleSettings();
	sal_Bool					bEnabled = IsEnabled();

	// Evt. noch offene Berechnungen nachholen
	if ( mbCalcSize )
		ImplCalc( sal_False );

    ControlPart nPart = (GetStyle() & WB_HORZ) ? PART_TRACK_HORZ_AREA : PART_TRACK_VERT_AREA;
    ControlState   nState = ( IsEnabled() ? CTRL_STATE_ENABLED : 0 ) | ( HasFocus() ? CTRL_STATE_FOCUSED : 0 );
    SliderValue    sldValue;
    
    sldValue.mnMin       = mnMinRange;
    sldValue.mnMax       = mnMaxRange;
    sldValue.mnCur       = mnThumbPos;
    sldValue.maThumbRect = maThumbRect;
    
    if( IsMouseOver() )
    {
        if( maThumbRect.IsInside( GetPointerPosPixel() ) )
            sldValue.mnThumbState |= CTRL_STATE_ROLLOVER;
    }

    const Rectangle aCtrlRegion( Point(0,0), GetOutputSizePixel() );
    bool bNativeOK = DrawNativeControl( CTRL_SLIDER, nPart,
                                        aCtrlRegion, nState, sldValue, rtl::OUString() );
    if( bNativeOK )
        return;

	if ( (nDrawFlags & SLIDER_DRAW_CHANNEL1) && !maChannel1Rect.IsEmpty() )
	{
		long		nRectSize;
		Rectangle	aRect = maChannel1Rect;
		SetLineColor( rStyleSettings.GetShadowColor() );
		if ( GetStyle() & WB_HORZ )
		{
			DrawLine( aRect.TopLeft(), Point( aRect.Left(), aRect.Bottom()-1 ) );
			DrawLine( aRect.TopLeft(), aRect.TopRight() );
		}
		else
		{
			DrawLine( aRect.TopLeft(), Point( aRect.Right()-1, aRect.Top() ) );
			DrawLine( aRect.TopLeft(), aRect.BottomLeft() );
		}
		SetLineColor( rStyleSettings.GetLightColor() );
		if ( GetStyle() & WB_HORZ )
		{
			DrawLine( aRect.BottomLeft(), aRect.BottomRight() );
			nRectSize = aRect.GetWidth();
		}
		else
		{
			DrawLine( aRect.TopRight(), aRect.BottomRight() );
			nRectSize = aRect.GetHeight();
		}

		if ( nRectSize > 1 )
		{
			aRect.Left()++;
			aRect.Top()++;
			if ( GetStyle() & WB_HORZ )
				aRect.Bottom()--;
			else
				aRect.Right()--;
			SetLineColor();
			if ( mnStateFlags & SLIDER_STATE_CHANNEL1_DOWN )
				SetFillColor( rStyleSettings.GetShadowColor() );
			else
				SetFillColor( rStyleSettings.GetCheckedColor() );
			DrawRect( aRect );
		}
	}

	if ( (nDrawFlags & SLIDER_DRAW_CHANNEL2) && !maChannel2Rect.IsEmpty() )
	{
		long		nRectSize;
		Rectangle	aRect = maChannel2Rect;
		SetLineColor( rStyleSettings.GetLightColor() );
		if ( GetStyle() & WB_HORZ )
		{
			DrawLine( aRect.TopRight(), aRect.BottomRight() );
			DrawLine( aRect.BottomLeft(), aRect.BottomRight() );
			nRectSize = aRect.GetWidth();
		}
		else
		{
			DrawLine( aRect.BottomLeft(), aRect.BottomRight() );
			DrawLine( aRect.TopRight(), aRect.BottomRight() );
			nRectSize = aRect.GetHeight();
		}

		if ( nRectSize > 1 )
		{
			SetLineColor( rStyleSettings.GetShadowColor() );
			if ( GetStyle() & WB_HORZ )
				DrawLine( aRect.TopLeft(), Point( aRect.Right()-1, aRect.Top() ) );
			else
				DrawLine( aRect.TopLeft(), Point( aRect.Left(), aRect.Bottom()-1 ) );

			aRect.Right()--;
			aRect.Bottom()--;
			if ( GetStyle() & WB_HORZ )
				aRect.Top()++;
			else
				aRect.Left()++;
			SetLineColor();
			if ( mnStateFlags & SLIDER_STATE_CHANNEL2_DOWN )
				SetFillColor( rStyleSettings.GetShadowColor() );
			else
				SetFillColor( rStyleSettings.GetCheckedColor() );
			DrawRect( aRect );
		}
	}

	if ( nDrawFlags & SLIDER_DRAW_THUMB )
	{
		if ( !maThumbRect.IsEmpty() )
		{
			if ( bEnabled )
			{
				nStyle = 0;
				if ( mnStateFlags & SLIDER_STATE_THUMB_DOWN )
					nStyle |= BUTTON_DRAW_PRESSED;
				aDecoView.DrawButton( maThumbRect, nStyle );
			}
			else
			{
				SetLineColor( rStyleSettings.GetShadowColor() );
				SetFillColor( rStyleSettings.GetCheckedColor() );
				DrawRect( maThumbRect );
			}
		}
	}
}

// -----------------------------------------------------------------------

sal_Bool Slider::ImplIsPageUp( const Point& rPos )
{
	Size aSize = GetOutputSizePixel();
	Rectangle aRect = maChannel1Rect;
	if ( GetStyle() & WB_HORZ )
	{
		aRect.Top() 	= 0;
		aRect.Bottom()	= aSize.Height()-1;
	}
	else
	{
		aRect.Left()	= 0;
		aRect.Right()	= aSize.Width()-1;
	}
	return aRect.IsInside( rPos );
}

// -----------------------------------------------------------------------

sal_Bool Slider::ImplIsPageDown( const Point& rPos )
{
	Size aSize = GetOutputSizePixel();
	Rectangle aRect = maChannel2Rect;
	if ( GetStyle() & WB_HORZ )
	{
		aRect.Top() 	= 0;
		aRect.Bottom()	= aSize.Height()-1;
	}
	else
	{
		aRect.Left()	= 0;
		aRect.Right()	= aSize.Width()-1;
	}
	return aRect.IsInside( rPos );
}

// -----------------------------------------------------------------------

long Slider::ImplSlide( long nNewPos, sal_Bool bCallEndSlide )
{
	long nOldPos = mnThumbPos;
	SetThumbPos( nNewPos );
	long nDelta = mnThumbPos-nOldPos;
	if ( nDelta )
	{
		mnDelta = nDelta;
		Slide();
		if ( bCallEndSlide )
			EndSlide();
		mnDelta = 0;
	}
	return nDelta;
}

// -----------------------------------------------------------------------

long Slider::ImplDoAction( sal_Bool bCallEndSlide )
{
	long nDelta = 0;

	switch ( meScrollType )
	{
		case SCROLL_LINEUP:
			nDelta = ImplSlide( mnThumbPos-mnLineSize, bCallEndSlide );
			break;

		case SCROLL_LINEDOWN:
			nDelta = ImplSlide( mnThumbPos+mnLineSize, bCallEndSlide );
			break;

		case SCROLL_PAGEUP:
			nDelta = ImplSlide( mnThumbPos-mnPageSize, bCallEndSlide );
			break;

		case SCROLL_PAGEDOWN:
			nDelta = ImplSlide( mnThumbPos+mnPageSize, bCallEndSlide );
			break;

		case SCROLL_SET:
		    nDelta = ImplSlide( ImplCalcThumbPos( GetPointerPosPixel().X() ), bCallEndSlide );
		    break;
        default:
            break;
	}

	return nDelta;
}

// -----------------------------------------------------------------------

void Slider::ImplDoMouseAction( const Point& rMousePos, sal_Bool bCallAction )
{
	sal_uInt16	nOldStateFlags = mnStateFlags;
	sal_Bool	bAction = sal_False;

	switch ( meScrollType )
	{   
    	case( SCROLL_SET ):
    	{
    	    const bool bUp = ImplIsPageUp( rMousePos ), bDown = ImplIsPageDown( rMousePos );
    	
			if ( bUp || bDown )
			{
				bAction = bCallAction;
				mnStateFlags |= ( bUp ? SLIDER_STATE_CHANNEL1_DOWN : SLIDER_STATE_CHANNEL2_DOWN );
			}
			else
				mnStateFlags &= ~( SLIDER_STATE_CHANNEL1_DOWN | SLIDER_STATE_CHANNEL2_DOWN );
			break;
    	}
    	
		case SCROLL_PAGEUP:
			if ( ImplIsPageUp( rMousePos ) )
			{
				bAction = bCallAction;
				mnStateFlags |= SLIDER_STATE_CHANNEL1_DOWN;
			}
			else
				mnStateFlags &= ~SLIDER_STATE_CHANNEL1_DOWN;
			break;

		case SCROLL_PAGEDOWN:
			if ( ImplIsPageDown( rMousePos ) )
			{
				bAction = bCallAction;
				mnStateFlags |= SLIDER_STATE_CHANNEL2_DOWN;
			}
			else
				mnStateFlags &= ~SLIDER_STATE_CHANNEL2_DOWN;
			break;
        default:
            break;
	}

	if ( bAction )
	{
		if ( ImplDoAction( sal_False ) )
		{
			// Update the channel complete
			if ( mnDragDraw & SLIDER_DRAW_CHANNEL )
			{
				Update();
				ImplDraw( mnDragDraw );
			}
		}
	}
	else if ( nOldStateFlags != mnStateFlags )
		ImplDraw( mnDragDraw );
}

// -----------------------------------------------------------------------

long Slider::ImplDoSlide( long nNewPos )
{
	if ( meScrollType != SCROLL_DONTKNOW )
		return 0;

	meScrollType = SCROLL_DRAG;
	long nDelta = ImplSlide( nNewPos, sal_True );
	meScrollType = SCROLL_DONTKNOW;
	return nDelta;
}

// -----------------------------------------------------------------------

long Slider::ImplDoSlideAction( ScrollType eScrollType )
{
	if ( (meScrollType != SCROLL_DONTKNOW) ||
		 (eScrollType == SCROLL_DONTKNOW) ||
		 (eScrollType == SCROLL_DRAG) )
		return 0;

	meScrollType = eScrollType;
	long nDelta = ImplDoAction( sal_True );
	meScrollType = SCROLL_DONTKNOW;
	return nDelta;
}

// -----------------------------------------------------------------------

void Slider::MouseButtonDown( const MouseEvent& rMEvt )
{
	if ( rMEvt.IsLeft() )
	{
		const Point&	rMousePos = rMEvt.GetPosPixel();
		sal_uInt16			nTrackFlags = 0;

		if ( maThumbRect.IsInside( rMousePos ) )
		{
			nTrackFlags 	= 0;
			meScrollType	= SCROLL_DRAG;
			mnDragDraw		= SLIDER_DRAW_THUMB;

			// Zusaetzliche Daten berechnen
			Point aCenterPos = maThumbRect.Center();
			if ( GetStyle() & WB_HORZ )
				mnMouseOff = rMousePos.X()-aCenterPos.X();
			else
				mnMouseOff = rMousePos.Y()-aCenterPos.Y();
		}
		else if ( ImplIsPageUp( rMousePos ) )
		{
		    if( GetStyle() & WB_SLIDERSET )
		        meScrollType = SCROLL_SET;
		    else
		    {
			    nTrackFlags = STARTTRACK_BUTTONREPEAT;
			    meScrollType = SCROLL_PAGEUP;
			}
			
			mnDragDraw = SLIDER_DRAW_CHANNEL;
		}
		else if ( ImplIsPageDown( rMousePos ) )
		{
		    if( GetStyle() & WB_SLIDERSET )
		        meScrollType = SCROLL_SET;
		    else
		    {
			    nTrackFlags = STARTTRACK_BUTTONREPEAT;
			    meScrollType = SCROLL_PAGEDOWN;
			}
			
			mnDragDraw = SLIDER_DRAW_CHANNEL;
		}

		// Soll Tracking gestartet werden
		if( meScrollType != SCROLL_DONTKNOW )
		{
			// Startposition merken fuer Abbruch und EndScroll-Delta
			mnStartPos = mnThumbPos;
			ImplDoMouseAction( rMousePos, meScrollType != SCROLL_SET );
			Update();
			
			if( meScrollType != SCROLL_SET )
		        StartTracking( nTrackFlags );
		}
	}
}

// -----------------------------------------------------------------------

void Slider::MouseButtonUp( const MouseEvent& )
{
    if( SCROLL_SET == meScrollType )
    {
		// Button und PageRect-Status wieder herstellen
		const sal_uInt16 nOldStateFlags = mnStateFlags;
		
		mnStateFlags &= ~( SLIDER_STATE_CHANNEL1_DOWN | SLIDER_STATE_CHANNEL2_DOWN | SLIDER_STATE_THUMB_DOWN );
		
		if ( nOldStateFlags != mnStateFlags )
			ImplDraw( mnDragDraw );
			
		mnDragDraw = 0;
    	ImplDoAction( sal_True );
    	meScrollType = SCROLL_DONTKNOW;
    }
}

// -----------------------------------------------------------------------

void Slider::Tracking( const TrackingEvent& rTEvt )
{
	if ( rTEvt.IsTrackingEnded() )
	{
		// Button und PageRect-Status wieder herstellen
		sal_uInt16 nOldStateFlags = mnStateFlags;
		mnStateFlags &= ~(SLIDER_STATE_CHANNEL1_DOWN | SLIDER_STATE_CHANNEL2_DOWN |
						  SLIDER_STATE_THUMB_DOWN);
		if ( nOldStateFlags != mnStateFlags )
			ImplDraw( mnDragDraw );
		mnDragDraw = 0;

		// Bei Abbruch, die alte ThumbPosition wieder herstellen
		if ( rTEvt.IsTrackingCanceled() )
		{
			long nOldPos = mnThumbPos;
			SetThumbPos( mnStartPos );
			mnDelta = mnThumbPos-nOldPos;
			Slide();
		}

		if ( meScrollType == SCROLL_DRAG )
		{
			// Wenn gedragt wurde, berechnen wir den Thumb neu, damit
			// er wieder auf einer gerundeten ThumbPosition steht
			ImplCalc();
			Update();

			if ( !mbFullDrag && (mnStartPos != mnThumbPos) )
			{
				mnDelta = mnThumbPos-mnStartPos;
				Slide();
				mnDelta = 0;
			}
		}

		mnDelta = mnThumbPos-mnStartPos;
		EndSlide();
		mnDelta = 0;
		meScrollType = SCROLL_DONTKNOW;
	}
	else
	{
		const Point rMousePos = rTEvt.GetMouseEvent().GetPosPixel();

		// Dragging wird speziell behandelt
		if ( meScrollType == SCROLL_DRAG )
		{
			long nMovePix;
			Point aCenterPos = maThumbRect.Center();
			if ( GetStyle() & WB_HORZ )
				nMovePix = rMousePos.X()-(aCenterPos.X()+mnMouseOff);
			else
				nMovePix = rMousePos.Y()-(aCenterPos.Y()+mnMouseOff);
			// Nur wenn sich Maus in die Scrollrichtung bewegt, muessen
			// wir etwas tun
			if ( nMovePix )
			{
				mnThumbPixPos += nMovePix;
				if ( mnThumbPixPos < mnThumbPixOffset )
					mnThumbPixPos = mnThumbPixOffset;
				if ( mnThumbPixPos > (mnThumbPixOffset+mnThumbPixRange-1) )
					mnThumbPixPos = mnThumbPixOffset+mnThumbPixRange-1;
				long nOldPos = mnThumbPos;
				mnThumbPos = ImplCalcThumbPos( mnThumbPixPos );
				if ( nOldPos != mnThumbPos )
				{
					ImplUpdateRects();
					Update();
					if ( mbFullDrag && (nOldPos != mnThumbPos) )
					{
						mnDelta = mnThumbPos-nOldPos;
						Slide();
						mnDelta = 0;
					}
				}
			}
		}
		else
			ImplDoMouseAction( rMousePos, rTEvt.IsTrackingRepeat() );

		// Wenn Slider-Werte so umgesetzt wurden, das es nichts
		// mehr zum Tracking gibt, dann berechen wir hier ab
		if ( !IsVisible() )
			EndTracking();
	}
}

// -----------------------------------------------------------------------

void Slider::KeyInput( const KeyEvent& rKEvt )
{
	if ( !rKEvt.GetKeyCode().GetModifier() )
	{
		switch ( rKEvt.GetKeyCode().GetCode() )
		{
			case KEY_HOME:
				ImplDoSlide( GetRangeMin() );
				break;
			case KEY_END:
				ImplDoSlide( GetRangeMax() );
				break;

			case KEY_LEFT:
			case KEY_UP:
				ImplDoSlideAction( SCROLL_LINEUP );
				break;

			case KEY_RIGHT:
			case KEY_DOWN:
				ImplDoSlideAction( SCROLL_LINEDOWN );
				break;

			case KEY_PAGEUP:
				ImplDoSlideAction( SCROLL_PAGEUP );
				break;

			case KEY_PAGEDOWN:
				ImplDoSlideAction( SCROLL_PAGEDOWN );
				break;

			default:
				Control::KeyInput( rKEvt );
				break;
		}
	}
	else
		Control::KeyInput( rKEvt );
}

// -----------------------------------------------------------------------

void Slider::Paint( const Rectangle& )
{
	ImplDraw( SLIDER_DRAW_ALL );
}

// -----------------------------------------------------------------------

void Slider::Resize()
{
    Control::Resize();
	mbCalcSize = sal_True;
	if ( IsReallyVisible() )
		ImplCalc( sal_False );
	Invalidate();
}

// -----------------------------------------------------------------------

void Slider::RequestHelp( const HelpEvent& rHEvt )
{
	Control::RequestHelp( rHEvt );
}

// -----------------------------------------------------------------------

void Slider::StateChanged( StateChangedType nType )
{
	Control::StateChanged( nType );

	if ( nType == STATE_CHANGE_INITSHOW )
		ImplCalc( sal_False );
	else if ( nType == STATE_CHANGE_DATA )
	{
		if ( IsReallyVisible() && IsUpdateMode() )
			ImplCalc( sal_True );
	}
	else if ( nType == STATE_CHANGE_UPDATEMODE )
	{
		if ( IsReallyVisible() && IsUpdateMode() )
		{
			ImplCalc( sal_False );
			Invalidate();
		}
	}
	else if ( nType == STATE_CHANGE_ENABLE )
	{
		if ( IsReallyVisible() && IsUpdateMode() )
			Invalidate();
	}
	else if ( nType == STATE_CHANGE_STYLE )
	{
		if ( IsReallyVisible() && IsUpdateMode() )
		{
			if ( (GetPrevStyle() & SLIDER_VIEW_STYLE) !=
				 (GetStyle() & SLIDER_VIEW_STYLE) )
			{
				mbCalcSize = sal_True;
				ImplCalc( sal_False );
				Invalidate();
			}
		}
	}
	else if ( nType == STATE_CHANGE_CONTROLBACKGROUND )
	{
		ImplInitSettings();
		Invalidate();
	}
}

// -----------------------------------------------------------------------

void Slider::DataChanged( const DataChangedEvent& rDCEvt )
{
	Control::DataChanged( rDCEvt );

	if ( (rDCEvt.GetType() == DATACHANGED_SETTINGS) &&
		 (rDCEvt.GetFlags() & SETTINGS_STYLE) )
	{
		ImplInitSettings();
		Invalidate();
	}
}

// -----------------------------------------------------------------------

void Slider::Slide()
{
	maSlideHdl.Call( this );
}

// -----------------------------------------------------------------------

void Slider::EndSlide()
{
	maEndSlideHdl.Call( this );
}

// -----------------------------------------------------------------------

void Slider::SetRangeMin( long nNewRange )
{
	SetRange( Range( nNewRange, GetRangeMax() ) );
}

// -----------------------------------------------------------------------

void Slider::SetRangeMax( long nNewRange )
{
	SetRange( Range( GetRangeMin(), nNewRange ) );
}

// -----------------------------------------------------------------------

void Slider::SetRange( const Range& rRange )
{
	// Range einpassen
	Range aRange = rRange;
	aRange.Justify();
	long nNewMinRange = aRange.Min();
	long nNewMaxRange = aRange.Max();

	// Wenn Range sich unterscheidet, dann neuen setzen
	if ( (mnMinRange != nNewMinRange) ||
		 (mnMaxRange != nNewMaxRange) )
	{
		mnMinRange = nNewMinRange;
		mnMaxRange = nNewMaxRange;

		// Thumb einpassen
		if ( mnThumbPos > mnMaxRange )
			mnThumbPos = mnMaxRange;
		if ( mnThumbPos < mnMinRange )
			mnThumbPos = mnMinRange;

		StateChanged( STATE_CHANGE_DATA );
	}
}

// -----------------------------------------------------------------------

void Slider::SetThumbPos( long nNewThumbPos )
{
	if ( nNewThumbPos < mnMinRange )
		nNewThumbPos = mnMinRange;
	if ( nNewThumbPos > mnMaxRange )
		nNewThumbPos = mnMaxRange;

	if ( mnThumbPos != nNewThumbPos )
	{
		mnThumbPos = nNewThumbPos;
		StateChanged( STATE_CHANGE_DATA );
	}
}

// -----------------------------------------------------------------------

Size Slider::CalcWindowSizePixel()
{
	long nWidth = mnMaxRange-mnMinRange+(SLIDER_THUMB_HALFSIZE*2)+1;
	long nHeight = SLIDER_HEIGHT;
	Size aSize;
	if ( GetStyle() & WB_HORZ )
	{
		aSize.Width()	= nWidth;
		aSize.Height()	= nHeight;
	}
	else
	{
		aSize.Height()	= nWidth;
		aSize.Width()	= nHeight;
	}
	return aSize;
}