var origwidth = 0;
var zoomposition = 0;

function objectRoll(olink) {
	olink.style.listStyleImage='url(/luce/images/browse_list_roll.gif)';
}

function changeDisplay(url) {
	newurl = url + "&display=" + document.forms[1].display.value
	window.location = newurl;
}

function changeSortBy(url) {
	newurl = url + "&sortby=" + document.forms[1].sortby.value
	window.location = newurl;
}

//------------------------------------------------------------------------------
function imageAdjust(img) {
	
	tmpimg = new Image();
	tmpimg.src = img.src;
	
	origwidth = 0;
	zoomposition = 0;

	//Variable Declaration
	img.style.marginTop = "0px";
	
	parentWidth 		= $(img.parentNode).getWidth(); //parseInt(img.parentNode.style.width);
	parentHeight 		= $(img.parentNode).getHeight(); //parseInt(img.parentNode.style.height);
	imgWidth 			= tmpimg.width;
	imgHeight 			= tmpimg.height;
	origwidth 			= tmpimg.width;
	origheight 			= tmpimg.height;
	imgRatio 			= imgWidth/imgHeight;
	
	//Resizes Image
	if (imgRatio > 1) {
		largerdim = "w";
	}
	else {
		largerdim = "h";
	}
	
	switch(largerdim) {
	
		case 'w':
		
			if(imgWidth > parentWidth) {
			
				img.width 	= parentWidth
				imgWidth 	= parseInt(img.width);
				imgHeight 	= parseInt(imgWidth/imgRatio);
			}
			break;
			
		case 'h':
		
			if(imgHeight > parentHeight) {
			
				img.width 	= imgRatio * parentHeight;  //img.height will automatically be set so that it's proporional to the width
				imgWidth 	= parseInt(img.width);
				imgHeight 	= parseInt(imgWidth/imgRatio);
			}
			break;
	}
	
	// Center Image vertically
	if (imgHeight < (parentHeight - 2)) {
		imgPad = (parentHeight - imgHeight)/2;
		imgPad = imgPad + "px";
		
		img.style.marginTop = imgPad;
		
		if (imgHeight == 0) {
			img.style.marginTop = "0px";
		}
	}
}
//------------------------------------------------------------------------------

function zoomIn(image){
	if(origwidth == 0) {
		origwidth = image.width;
	}
	if(zoomposition < 3) {
		zoomposition++;
		image.width = (image.width) * 1.5;
	}
}

function resetIMG(){
	var obj = document.getElementById("image1");
	
	endDrag();
	
	obj.width = origwidth;
	obj.style.left = "0px";
	obj.style.top = "0px";
	obj.style.right = "0px";
	obj.style.bottom = "0px";
	zoomposition = 0;
	
	imageAdjust(obj);
}

function zoomOut(image){
	if(zoomposition > 0) {
		zoomposition--;
		if(zoomposition != 0) {
			image.width = (image.width) / 1.5;
		}
		else {
			resetIMG();
		}
	}
}

function InitDrag() {
	//alert(document.getElementById("image1").offsetTop + "," + document.getElementById("image1").offsetLeft);
	if(zoomposition != 0) {
		var obj = document.getElementById("image1");
		
		ypos = obj.offsetTop
		xpos = obj.offsetLeft
		xmax = 200;
		xmin = -(obj.width - 200);
		ymax = 200;
		ymin = -(obj.height - 200)
		Drag.init(obj,null,xmin,xmax,ymin,ymax);
	}
}

function endDrag() {
	Drag.end();//init(document.getElementById("image1"),null,0,0,0,0);
}

var cursormode = null;

function activatecontrol(control){
	switch(control) {
		case "zoomin":
			cursormode = control;
			document.getElementById("objectbox1").style.cursor = "crosshair";
			endDrag();
			break;
		case "zoomout":
			cursormode = control;
			document.getElementById("objectbox1").style.cursor = "crosshair";
			endDrag();
			break;
		case "pan":
			cursormode = control;
			document.getElementById("objectbox1").style.cursor = "move";
			InitDrag();
			break;
		default:
			break;
	}
}

function imageclick(){
	switch(cursormode) {
		case "zoomin":
			zoomIn(document.getElementById("image1"));
			break;
		case "zoomout":
			zoomOut(document.getElementById("image1"));
			break;
		default:
	}	
}

/**************************************************
 * dom-drag.js
 * 09.25.2001
 * www.youngpup.net
 **************************************************
 * 10.28.2001 - fixed minor bug where events
 * sometimes fired off the handle, not the root.
 **************************************************/

var Drag = {

	obj : null,

	init : function(o, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
	{
		o.onmousedown	= Drag.start;

		o.hmode			= bSwapHorzRef ? false : true ;
		o.vmode			= bSwapVertRef ? false : true ;

		o.root = oRoot && oRoot != null ? oRoot : o ;

		if (o.hmode  && isNaN(parseInt(o.root.style.left  ))) o.root.style.left   = "0px";
		if (o.vmode  && isNaN(parseInt(o.root.style.top   ))) o.root.style.top    = "0px";
		if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right  = "0px";
		if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";

		o.minX	= typeof minX != 'undefined' ? minX : null;
		o.minY	= typeof minY != 'undefined' ? minY : null;
		o.maxX	= typeof maxX != 'undefined' ? maxX : null;
		o.maxY	= typeof maxY != 'undefined' ? maxY : null;

		o.xMapper = fXMapper ? fXMapper : null;
		o.yMapper = fYMapper ? fYMapper : null;

		o.root.onDragStart	= new Function();
		o.root.onDragEnd	= new Function();
		o.root.onDrag		= new Function();
	},

	start : function(e)
	{
		var o = Drag.obj = this;
		e = Drag.fixE(e);
		var y = parseInt(o.vmode ? o.root.style.top  : o.root.style.bottom);
		var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
		o.root.onDragStart(x, y);

		o.lastMouseX	= e.clientX;
		o.lastMouseY	= e.clientY;

		if (o.hmode) {
			if (o.minX != null)	o.minMouseX	= e.clientX - x + o.minX;
			if (o.maxX != null)	o.maxMouseX	= o.minMouseX + o.maxX - o.minX;
		} else {
			if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
			if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
		}

		if (o.vmode) {
			if (o.minY != null)	o.minMouseY	= e.clientY - y + o.minY;
			if (o.maxY != null)	o.maxMouseY	= o.minMouseY + o.maxY - o.minY;
		} else {
			if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
			if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
		}

		document.onmousemove	= Drag.drag;
		document.onmouseup		= Drag.end;

		return false;
	},

	drag : function(e)
	{
		e = Drag.fixE(e);
		var o = Drag.obj;

		var ey	= e.clientY;
		var ex	= e.clientX;
		var y = parseInt(o.vmode ? o.root.style.top  : o.root.style.bottom);
		var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
		var nx, ny;

		if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);
		if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);
		if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);
		if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);

		nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));
		ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));

		if (o.xMapper)		nx = o.xMapper(y)
		else if (o.yMapper)	ny = o.yMapper(x)

		Drag.obj.root.style[o.hmode ? "left" : "right"] = nx + "px";
		Drag.obj.root.style[o.vmode ? "top" : "bottom"] = ny + "px";
		Drag.obj.lastMouseX	= ex;
		Drag.obj.lastMouseY	= ey;

		Drag.obj.root.onDrag(nx, ny);
		return false;
	},

	end : function()
	{
		if (Drag.obj) {
			document.onmousemove = null;
			document.onmouseup   = null;
			Drag.obj.root.onDragEnd(	parseInt(Drag.obj.root.style[Drag.obj.hmode ? "left" : "right"]), 
										parseInt(Drag.obj.root.style[Drag.obj.vmode ? "top" : "bottom"]));
		}
		Drag.obj = null;
	},

	fixE : function(e)
	{
		if (typeof e == 'undefined') e = window.event;
		if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
		if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
		return e;
	}
};