#include "Scroll.h"
#include "Bild.h"
#include "MausEreignis.h"

using namespace Framework;

// Inhalt der VScrollBar Klasse aus Scroll.h
// Konstruktor 
ScrollBar::ScrollBar()
	: data(new ScrollData()),
	  knopfdruck( 0 ),
	  farbe( 0xFF808080),
	  bgFarbe( 0xFF000000 ),
	  bg( 0 ),
	  klickScroll( 10 ),
	  mx( -1 ),
	  my( -1 ),
	  mp( 0 ),
	  rend( 0 ),
	  ref( 1 )
{
}

// Destruktor 
ScrollBar::~ScrollBar()
{
	delete data;
}

// nicht constant
void ScrollBar::setFarbe( int fc )
{
	farbe = fc;
	rend = 1;
}

void ScrollBar::setBgFarbe( int fc, bool bgF )
{
	bgFarbe = fc;
	bg = bgF;
	rend = 1;
}

void ScrollBar::update( int maxGr, int anzeigeGr )
{
	if( data->max != maxGr || data->anzeige != anzeigeGr )
	{
		data->max = maxGr, data->anzeige = anzeigeGr;
		rend = 1;
	}
	if( data->scrollPos > data->max - data->anzeige && data->max - data->anzeige >= 0 )
	{
		data->scrollPos = data->max - data->anzeige;
		rend = 1;
	}
	if( data->scrollPos < 0 )
	{
		data->scrollPos = 0;
		rend = 1;
	}
}

void ScrollBar::setKlickScroll( int ks )
{
	klickScroll = ks;
	rend = 1;
}

void ScrollBar::scroll( int höhe )
{
	data->scrollPos = höhe;
	if( data->scrollPos > data->max - data->anzeige )
		data->scrollPos = data->max - data->anzeige;
	if( data->scrollPos < 0 )
		data->scrollPos = 0;
	rend = 1;
}

bool ScrollBar::getRend()
{
	if( knopfdruck == 1 )
	{
		int tmp = data->scrollPos;
		data->scrollPos -= klickScroll;
		if( data->scrollPos > data->max - data->anzeige )
			data->scrollPos = data->max - data->anzeige;
		if( data->scrollPos < 0 )
			data->scrollPos = 0;
		if( tmp != data->scrollPos )
			rend = 1;
	}
	if( knopfdruck == 2 )
	{
		int tmp = data->scrollPos;
		data->scrollPos += klickScroll;
		if( data->scrollPos > data->max - data->anzeige )
			data->scrollPos = data->max - data->anzeige;
		if( data->scrollPos < 0 )
			data->scrollPos = 0;
		if( tmp != data->scrollPos )
			rend = 1;
	}
	bool ret = rend;
	rend = 0;
	return ret;
}

// const 
ScrollData *ScrollBar::getScrollData() const
{
	return data;
}

int ScrollBar::getKlickScroll() const
{
	return klickScroll;
}

int ScrollBar::getFarbe() const
{
	return farbe;
}

int ScrollBar::getBgFarbe() const
{
	return bg ? bgFarbe : 0;
}

int ScrollBar::getScroll() const
{
    return data->scrollPos;
}

// Reference Counting
ScrollBar *ScrollBar::getThis()
{
	++ref;
	return this;
}

ScrollBar *ScrollBar::release()
{
	--ref;
	if( ref == 0 )
		delete this;
	return 0;
}

// Inhalt der VScrollBar Klasse
VScrollBar::VScrollBar()
    : ScrollBar()
{
}

bool VScrollBar::doMausMessage( int x, int y, int br, int hö, MausEreignis &me )
{
    bool ret = me.mx >= x && me.mx <= x + br && me.my >= y && me.my <= y + hö;
    knopfdruck = 0;
    if( me.verarbeitet )
    {
        mx = -1, my = -1;
        mp = 0;
        return ret;
    }
    if( me.id == ME_UScroll )
    {
        data->scrollPos -= klickScroll;
        if( data->scrollPos < 0 )
            data->scrollPos = 0;
        rend = 1;
        return ret;
    }
    if( me.id == ME_DScroll )
    {
        data->scrollPos += klickScroll;
        if( data->scrollPos > data->max - data->anzeige )
            data->scrollPos = data->max - data->anzeige;
        if( data->scrollPos < 0 )
            data->scrollPos = 0;
        rend = 1;
        return ret;
    }
    if( ret )
        mx = me.mx - x, my = me.my - y;
    else
        mx = -1, my = -1;
    if( me.id == ME_PLinks )
        mp = 1;
    if( me.id == ME_RLinks )
        mp = 0;
    if( mp )
    {
        if( mx >= 0 && my >= 0 )
        {
            if( my < br )
            {
                knopfdruck = 1;
                data->scrollPos -= klickScroll;
            }
            else if( my > hö - br )
            {
                knopfdruck = 2;
                data->scrollPos += klickScroll;
            }
            else
                data->scrollPos = (int)( ( data->max / ( hö - 2.0 * br ) ) * ( my - br ) ) - data->anzeige / 2;
            if( data->scrollPos > data->max - data->anzeige )
                data->scrollPos = data->max - data->anzeige;
            if( data->scrollPos < 0 )
                data->scrollPos = 0;
            rend = 1;
        }
    }
    return ret;
}

void VScrollBar::render( int x, int y, int br, int hö, Bild &zRObj ) const
{
    if( bg )
        zRObj.alphaRegion( x, y, br, hö, bgFarbe );
    --br;
    --hö;
    zRObj.drawLinieH( x, y, br + 1, farbe );
    zRObj.drawLinieH( x, y + hö, br + 1, farbe );
    zRObj.drawLinieV( x, y + 1, hö - 1, farbe );
    zRObj.drawLinieV( x + br, y + 1, hö - 1, farbe );
    zRObj.drawLinieH( x + 1, y + br, br - 1, farbe );
    zRObj.drawLinieH( x + 1, y + hö - br, br - 1, farbe );
    ++br;
    ++hö;
    int st = (int)( data->scrollPos / ( data->max / ( hö - br * 2.0 ) ) );
    int end = (int)( ( hö - 2.0 * br ) / ( (double)data->max / data->anzeige ) );
    if( data->scrollPos > data->max - data->anzeige )
        data->scrollPos = data->max - data->anzeige;
    if( data->scrollPos < 0 )
    {
        data->scrollPos = 0;
        end = hö - br * 2;
    }
    zRObj.füllRegion( x + 1, y + br + st, br - 1, end, farbe );
}

ScrollBar *VScrollBar::release()
{
    --ref;
    if( ref == 0 )
        delete this;
    return 0;
}

// Inhalt der HScrollBar Klasse aus Scroll.h
// Konstruktor 
HScrollBar::HScrollBar()
	: ScrollBar()
{
}

// nicht constant
bool HScrollBar::doMausMessage( int x, int y, int br, int hö, MausEreignis &me )
{
    bool ret = me.mx >= x && me.mx <= x + br && me.my >= y && me.my <= y + hö;
	knopfdruck = 0;
	if( me.verarbeitet )
	{
		mx = -1, my = -1;
		mp = 0;
		return ret;
	}
	if( me.id == ME_LScroll )
	{
		data->scrollPos -= klickScroll;
		if( data->scrollPos < 0 )
			data->scrollPos = 0;
		rend = 1;
		return ret;
	}
	if( me.id == ME_RScroll )
	{
		data->scrollPos += klickScroll;
		if( data->scrollPos > data->max - data->anzeige )
			data->scrollPos = data->max - data->anzeige;
		if( data->scrollPos < 0 )
			data->scrollPos = 0;
		rend = 1;
		return ret;
	}
	if( ret )
		mx = me.mx - x, my = me.my - y;
	else
		mx = -1, my = -1;
	if( me.id == ME_PLinks )
		mp = 1;
	if( me.id == ME_RLinks )
		mp = 0;
	if( mp )
	{
		if( mx >= 0 && my >= 0 )
		{
			if( mx < hö )
			{
				knopfdruck = 1;
				data->scrollPos -= klickScroll;
			}
			else if( mx > br - hö )
			{
				knopfdruck = 2;
				data->scrollPos += klickScroll;
			}
			else
				data->scrollPos = (int)( ( data->max / ( br - 2.0 * hö ) ) * ( mx - hö ) ) - data->anzeige / 2;
			if( data->scrollPos > data->max - data->anzeige )
				data->scrollPos = data->max - data->anzeige;
			if( data->scrollPos < 0 )
				data->scrollPos = 0;
			rend = 1;
		}
	}
    return ret;
}

void HScrollBar::render( int x, int y, int br, int hö, Bild &zRObj ) const
{
	if( bg )
		zRObj.alphaRegion( x, y, br, hö, bgFarbe );
	--br;
	--hö;
	zRObj.drawLinieV( x, y, hö + 1, farbe );
	zRObj.drawLinieV( x + br, y, hö + 1, farbe );
	zRObj.drawLinieH( x + 1, y, br - 1, farbe );
	zRObj.drawLinieH( x + 1, y + hö, br - 1, farbe );
	zRObj.drawLinieV( x + hö, y + 1, hö - 1, farbe );
	zRObj.drawLinieV( x + br - hö, y + 1, hö - 1, farbe );
	++br;
	++hö;
	int st = (int)( data->scrollPos / ( data->max / ( br - hö * 2.0 ) ) );
	int end = (int)( ( br - 2.0 * hö ) / ( (double)data->max / data->anzeige ) );
	if( data->scrollPos > data->max - data->anzeige )
		data->scrollPos = data->max - data->anzeige;
	if( data->scrollPos < 0 )
	{
		data->scrollPos = 0;
		end = br - hö * 2;
	}
	zRObj.füllRegion( x + hö + st, y + 1, end, hö - 1, farbe );
}

ScrollBar *HScrollBar::release()
{
	--ref;
	if( ref == 0 )
		delete this;
	return 0;
}