/*
** Haaf's Game Engine 1.7
** Copyright (C) 2003-2007, Relish Games
** hge.relishgames.com
**
** hgeGUI default controls implementation
*/


#include "hgeguictrls.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#define min(a,b) ((a)<(b)?(a):(b))
#define max(a,b) ((a)>(b)?(a):(b))
/*
** hgeGUIText
*/

hgeGUIText::hgeGUIText(int _id, float x, float y, float w, float h, hgeFont *fnt)
{
	id=_id;
	bStatic=true;
	bVisible=true;
	bEnabled=true;
	rect.Set(x, y, x+w, y+h);

	font=fnt;
	tx=x;
	ty=y+(h-fnt->GetHeight())/2.0f;

	text[0]=0;
}

void hgeGUIText::SetMode(int _align)
{
	align=_align;
	if(align==HGETEXT_RIGHT) tx=rect.x2;
	else if(align==HGETEXT_CENTER) tx=(rect.x1+rect.x2)/2.0f;
	else tx=rect.x1;
}

void hgeGUIText::SetText(const char *_text)
{
	strncpy(text, _text, sizeof(text)-1);
	text[sizeof(text) - 1] = '\0';
}

void hgeGUIText::printf(const char *format, ...)
{
	va_list vl;
	va_start(vl, format);
	vsnprintf(text, sizeof(text)-1, format, vl);
	va_end(vl);
}

void hgeGUIText::Render()
{
	font->SetColor(color);
	font->Render(tx,ty,align,text);
}

/*
** hgeGUIButton
*/

hgeGUIButton::hgeGUIButton(int _id, float x, float y, float w, float h, HTEXTURE tex, float tx, float ty)
{
	id=_id;
	bStatic=false;
	bVisible=true;
	bEnabled=true;
	rect.Set(x, y, x+w, y+h);

	bPressed=false;
	bTrigger=false;

	sprUp = new hgeSprite(tex, tx, ty, w, h);
	sprDown = new hgeSprite(tex, tx+w, ty, w, h);
}

hgeGUIButton::~hgeGUIButton()
{
	if(sprUp) delete sprUp;
	if(sprDown) delete sprDown;
}

void hgeGUIButton::Render()
{
	if(bPressed) sprDown->Render(rect.x1, rect.y1);
	else sprUp->Render(rect.x1, rect.y1);
}

bool hgeGUIButton::MouseLButton(bool bDown)
{
	if(bDown)
	{
		bOldState=bPressed; bPressed=true;
		return false;
	}
	else
	{
		if(bTrigger) bPressed=!bOldState;
		else bPressed=false;
		return true;
	}
}

/*
** hgeGUISlider
*/

hgeGUISlider::hgeGUISlider(int _id, float x, float y, float w, float h, HTEXTURE tex, float tx, float ty, float sw, float sh, bool vertical)
{
	id=_id;
	bStatic=false;
	bVisible=true;
	bEnabled=true;
	bPressed=false;
	bVertical=vertical;
	rect.Set(x, y, x+w, y+h);

	mode=HGESLIDER_BAR;
	fMin=0; fMax=100; fVal=50;
	sl_w=sw; sl_h=sh;

	sprSlider=new hgeSprite(tex, tx, ty, sw, sh);
}

hgeGUISlider::~hgeGUISlider()
{
	if(sprSlider) delete sprSlider;
}

void hgeGUISlider::SetValue(float _fVal)
{
	if(_fVal<fMin) fVal=fMin;
	else if(_fVal>fMax) fVal=fMax;
	else fVal=_fVal;
}

void hgeGUISlider::Render()
{
	float xx, yy;
	float x1,y1,x2,y2;

	xx=rect.x1+(rect.x2-rect.x1)*(fVal-fMin)/(fMax-fMin);
	yy=rect.y1+(rect.y2-rect.y1)*(fVal-fMin)/(fMax-fMin);

	if(bVertical)
		switch(mode)
		{
			case HGESLIDER_BAR: x1=rect.x1; y1=rect.y1; x2=rect.x2; y2=yy; break;
			case HGESLIDER_BARRELATIVE: x1=rect.x1; y1=(rect.y1+rect.y2)/2; x2=rect.x2; y2=yy; break;
			case HGESLIDER_SLIDER: x1=(rect.x1+rect.x2-sl_w)/2; y1=yy-sl_h/2; x2=(rect.x1+rect.x2+sl_w)/2; y2=yy+sl_h/2; break;
		}
	else
		switch(mode)
		{
			case HGESLIDER_BAR: x1=rect.x1; y1=rect.y1; x2=xx; y2=rect.y2; break;
			case HGESLIDER_BARRELATIVE: x1=(rect.x1+rect.x2)/2; y1=rect.y1; x2=xx; y2=rect.y2; break;
			case HGESLIDER_SLIDER: x1=xx-sl_w/2; y1=(rect.y1+rect.y2-sl_h)/2; x2=xx+sl_w/2; y2=(rect.y1+rect.y2+sl_h)/2; break;
		}

	sprSlider->RenderStretch(x1, y1, x2, y2);
}

bool hgeGUISlider::MouseLButton(bool bDown)
{
	bPressed=bDown;
	return false;
}

bool hgeGUISlider::MouseMove(float x, float y)
{
	if(bPressed)
	{
		if(bVertical)
		{
			if(y>rect.y2-rect.y1) y=rect.y2-rect.y1;
			if(y<0) y=0;
			fVal=fMin+(fMax-fMin)*y/(rect.y2-rect.y1);
		}
		else
		{
			if(x>rect.x2-rect.x1) x=rect.x2-rect.x1;
			if(x<0) x=0;
			fVal=fMin+(fMax-fMin)*x/(rect.x2-rect.x1);
		}
		return true;
	}

	return false;
}


/*
** hgeGUIListbox
*/

hgeGUIListbox::hgeGUIListbox(int _id, float x, float y, float w, float h, hgeFont *fnt, DWORD tColor, DWORD thColor, DWORD hColor)
{
	id=_id;
	bStatic=false;
	bVisible=true;
	bEnabled=true;
	rect.Set(x, y, x+w, y+h);
	font=fnt;
	sprHighlight=new hgeSprite(0, 0, 0, w, fnt->GetHeight());
	sprHighlight->SetColor(hColor);
	textColor=tColor;
	texthilColor=thColor;
	pItems=0;
	nItems=0;

	nSelectedItem=0;
	nTopItem=0;
	mx=0; my=0;
}

hgeGUIListbox::~hgeGUIListbox()
{
	Clear();
	if(sprHighlight) delete sprHighlight;
}


int hgeGUIListbox::AddItem(char *item)
{
	hgeGUIListboxItem *pItem=pItems, *pPrev=0, *pNew;

	pNew = new hgeGUIListboxItem;
	memcpy(pNew->text, item, min(sizeof(pNew->text), strlen(item)+1));
	pNew->text[sizeof(pNew->text)-1]='\0';
	pNew->next=0;

	while(pItem) { pPrev=pItem;	pItem=pItem->next; }

	if(pPrev) pPrev->next=pNew;
	else pItems=pNew;
	nItems++;

	return nItems-1;
}

void hgeGUIListbox::DeleteItem(int n)
{
	int i;
	hgeGUIListboxItem *pItem=pItems, *pPrev=0;

	if(n<0 || n>=GetNumItems()) return;

	for(i=0;i<n;i++) { pPrev=pItem;	pItem=pItem->next; }

	if(pPrev) pPrev->next=pItem->next;
	else pItems=pItem->next;

	delete pItem;
	nItems--;
}

char *hgeGUIListbox::GetItemText(int n)
{
	int i;
	hgeGUIListboxItem *pItem=pItems;

	if(n<0 || n>=GetNumItems()) return 0;

	for(i=0;i<n;i++) pItem=pItem->next;

	return pItem->text;
}

void hgeGUIListbox::Clear()
{
	hgeGUIListboxItem *pItem=pItems, *pNext;

	while(pItem)
	{
		pNext=pItem->next;
		delete pItem;
		pItem=pNext;
	}

	pItems=0;
	nItems=0;
}

void hgeGUIListbox::Render()
{
	int i;
	hgeGUIListboxItem *pItem=pItems;

	for(i=0;i<nTopItem;i++) pItem=pItem->next;
	for(i=0;i<GetNumRows();i++)
	{
		if(i>=nItems) return;

		if(nTopItem+i == nSelectedItem)
		{
			sprHighlight->Render(rect.x1,rect.y1+i*font->GetHeight());
			font->SetColor(texthilColor);
		}
		else
			font->SetColor(textColor);

		font->Render(rect.x1+3, rect.y1+i*font->GetHeight(), HGETEXT_LEFT, pItem->text);
		pItem=pItem->next;
	}
}

bool hgeGUIListbox::MouseLButton(bool bDown)
{
	int nItem;

	if(bDown)
	{
		nItem=nTopItem+int(my)/int(font->GetHeight());
		if(nItem<nItems)
		{
			nSelectedItem=nItem;
			return true;
		}
	}
	return false;
}


bool hgeGUIListbox::MouseWheel(int nNotches)
{
	nTopItem-=nNotches;
	if(nTopItem<0) nTopItem=0;
	if(nTopItem>GetNumItems()-GetNumRows()) nTopItem=GetNumItems()-GetNumRows();

	return true;
}

bool hgeGUIListbox::KeyClick(int key, int chr)
{
	switch(key)
	{
		case HGEK_DOWN:
			if(nSelectedItem < nItems-1)
			{
				nSelectedItem++;
				if(nSelectedItem > nTopItem+GetNumRows()-1) nTopItem=nSelectedItem-GetNumRows()+1;
				return true;
			}
			break;

		case HGEK_UP:
			if(nSelectedItem > 0)
			{
				nSelectedItem--;
				if(nSelectedItem < nTopItem) nTopItem=nSelectedItem;
				return true;
			}
			break;
	}
	return false;
}