const BOTTOMBORDER=100;
const RIGHTBORDER=300;
const LEFTBORDER=50;
const TOPBORDER=50;

document.maxX=0;
document.maxY=0;
dragNDrop.addSubscriber(notifyObjectMove,"endMoving");


function notifyObjectMove(publisher,eventType,addInfo){
	if (("endMoving"==eventType) && (addInfo != null)){
		var posX=parseInt(addInfo.style.left.split("px")[0]);
		var posY=parseInt(addInfo.style.top.split("px")[0]);

		if (posY<TOPBORDER){ 
			moveAllNodes("vert",TOPBORDER);
		}
		if (posX<LEFTBORDER){ 
			moveAllNodes("horiz",LEFTBORDER);
		}

		if (((posX+RIGHTBORDER)>document.maxX) || ((posY+BOTTOMBORDER)>document.maxY)) {
			document.maxX=posX+RIGHTBORDER;
			document.maxY=posY+BOTTOMBORDER;
			resizeWorkspace();
		}
	}
}

function moveAllNodes(axis,pixels){
	var allNodes=document.getElementById("nodes").childNodes;
	for (var i=0;i<allNodes.length;i++){
		var theNode=allNodes[i];
		if (axis=="horiz"){
			theNode.style.left=(parseInt(theNode.style.left.split("px")[0])+pixels)+"px";
		} else {
			theNode.style.top=(parseInt(theNode.style.top.split("px")[0])+pixels)+"px";
		}
		theNode.redrawNodeRelations();
	}
}

function resizeWorkspace(){
	var rightBottom=document.getElementById("rightBottom");
	rightBottom.style.left=document.maxX + "px";
	rightBottom.style.top=document.maxY + "px";
}

function autoRepositionNodes(){
	var minLeft=99999;
	var minTop=99999;

	var allNodes=document.getElementById("nodes").childNodes;
	for (var i=0;i<allNodes.length;i++){
		var theNode=allNodes[i];
		var currTop=parseInt(theNode.style.top.split("px")[0]);
		var currLeft=parseInt(theNode.style.left.split("px")[0]);
	
		if (currTop < minTop) { minTop=currTop; }
		if (currLeft < minLeft) { minLeft=currLeft; }
	}
	
	moveAllNodes("horiz",(minLeft*-1)+LEFTBORDER);
	moveAllNodes("vert",(minTop*-1)+TOPBORDER);
}

function drawBorders(){
	var horizTopBorder=document.createElement("div");
	horizTopBorder.setAttribute("class","horizTopBorder");
	document.getElementById("generalControls").appendChild(horizTopBorder);
	horizTopBorder.style.height=TOPBORDER + "px";
	
	var vertLeftBorder=document.createElement("div");
	vertLeftBorder.setAttribute("class","vertLeftBorder");
	document.getElementById("generalControls").appendChild(vertLeftBorder);
	vertLeftBorder.style.width=LEFTBORDER + "px";
}