/*************************************************************** 

 * Application Name: DM FileManager									

 * Application URI: http://www.dutchmonkey.com/

 * Description: AJAX Web Based File Management System.

 * Author: Frank D. Strack

 * Author Email: development@dutchmonkey.com

 * Author URI: http://www.dutchmokney.com

 ***************************************************************/



var g_Browser = new Browser();



document.onmousemove 	= __mouseMove;

document.onmouseup   	= __mouseUp;



var dragObject  = null;

var mouseOffset = null;



function mouseCoords(ev){

	if(ev.pageX || ev.pageY){

		return {x:ev.pageX, y:ev.pageY};

	}

	return {

		x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,

		y:ev.clientY + document.body.scrollTop  - document.body.clientTop

	};

}



function getMouseOffset(target, ev){

	ev = ev || window.event;



	var docPos    = getPosition(target);

	var mousePos  = mouseCoords(ev);

	return {x:mousePos.x - docPos.x, y:mousePos.y - docPos.y};

}



function getPosition(e){

	var left = 0;

	var top  = 0;



	while (e.offsetParent){

		left += e.offsetLeft;

		top  += e.offsetTop;

		e     = e.offsetParent;

	}



	left += e.offsetLeft;

	top  += e.offsetTop;



	return {x:left, y:top};

}



function __mouseMove(ev){

	ev           = ev || window.event;

	var mousePos = mouseCoords(ev);



	if(dragObject)

	{

		dragObject.style.position = 'absolute';

		

		var top = mousePos.y - mouseOffset.y;

		var left = mousePos.x - mouseOffset.x;

		

		if((top + dragObject.clientHeight) >= (g_Browser.Height() - 25))	top 	= (g_Browser.Height() - 25) - dragObject.clientHeight;

		if((left + dragObject.clientWidth) >= (g_Browser.Width() - 25))		left 	= (g_Browser.Width() - 25) - dragObject.clientWidth;

		

		if(top <= 25)	top = 25;

		if(left <= 25) 	left = 25;

		

		dragObject.style.top  = top;

		dragObject.style.left = left;



		return false;

	}

}



function __mouseUp(){

	dragObject = null;

}



function MakeDraggable(item, obj){

	if(!item) return;

	item.onmousedown = function(ev){

		dragObject  = obj;

		mouseOffset = getMouseOffset(this, ev);

		return false;

	}

}



function makeClickable(object){

	object.onmousedown = function(){

		dragObject = this;

	}

}