var newMinx = 0;
var newMiny = 0;
var newMaxx = 0;
var newMaxy = 0;
var boxMinx = 0;
var boxMiny = 0;
var boxMaxx = 0;
var boxMaxy = 0;

var mapClickAsRecenter = true;
var mapBoxAsZoom = true;
var allowRubberband = true;
var allowMapClick = true;
var state = "zoomIn";  // zoomOut, pan

// Global vars to save mouse position
var mouseX=0;
var mouseY=0;
var x1=0;
var y1=0;
var x2=0;
var y2=0;
var zminx=0;
var zmaxx=0;
var zmaxy=0;
var zminy=0;

var mapX = 0; 
var mapY = 0; 
var zoomBoxWidth = 1;

//SEARCHLITE var state = "zoom"; // "pan"

var zooming=false;
var panning=false;
var bottomBorderHeight = 13;



//***********************************************	
//***************** FUNCTIONS *******************
//***********************************************

// check for mouseup
function chkMouseUp(e) { 
	if (zooming || panning) {
		if (mouseX<0)
		 	mouseX = 0;
		if (mouseX>iWidth)
			mouseX = iWidth;
		if (mouseY<0)
			mouseY = 0;
		if (mouseY>iHeight)
			mouseY = iHeight;
		mapTool(e);
	}
}

function customMapBox(_newMinx, _newMiny, _newMaxx, _newMaxy) {

}

function customMapClick(_newX, _newY) {

}

function getImageXY(e) {
	//alert("getImageXY");
	//if (document.layers) {
	if (top.isNav) {
		mouseX=e.pageX;
		mouseY=e.pageY;
	} else {
		mouseX=event.clientX + document.body.scrollLeft;
		mouseY=event.clientY + document.body.scrollTop;
	}
	// subtract offsets from page left and right
	mouseX = mouseX-hspc;
	mouseY = mouseY-vspc;
}	

// convert mouse click xy's into map coordinates
function getMapXY(xIn,yIn) {
	mouseX = xIn;
	var pixelX = (maxx-minx) / iWidth;
	mapX = pixelX * mouseX + minx;
	mouseY = iHeight - yIn;
	var pixelY = (maxy-miny) / iHeight;
	mapY = pixelY * mouseY + miny;
}

// get the coords at mouse position
function getMouse(e) {
 
	window.status="";
	getImageXY(e);
	if (zooming) {
		if (mouseX<0)
		 	mouseX = 0;
		if (mouseX>iWidth)
			mouseX = iWidth;
		if (mouseY<0)
			mouseY = 0;
		if (mouseY>iHeight-bottomBorderHeight)
			mouseY = iHeight-bottomBorderHeight;
		x2=mouseX;
		y2=mouseY;
		setClip();
		return false;
	} else if (panning) {
		x2=mouseX;
		y2=mouseY;
		panMouse();	
		return false;
	} else 
    	return true;
	return true;
}

function hideZoomBox() {
	hideLayer("zoomBoxTop");
	hideLayer("zoomBoxLeft");
	hideLayer("zoomBoxRight");
	hideLayer("zoomBoxBottom");
}

// perform appropriate action with mapTool
function mapTool (e) {
	getImageXY(e);
	
	  // Deal with the possibility of an
	  // "identify" first, since it is a
	  // little different than the other
	  // states (doesn't require a mouse
	  // up event).  
	  	
	if ((state == "identify") && 
	    (mouseX >= 0) && (mouseX <= iWidth) && 
	    (mouseY >= 0) && (mouseY <= iHeight)){
			getMapXY(mouseX,mouseY);
			sendIdentify(mapX,mapY);
			return true; // <-- false assures that the popup
			              //     box stays in front.
	}
	
	  // If we made it to here, it's a 
	  // navigational click and not an
	  // identify.
	
	if ((!zooming) && (!panning) && 
		(mouseX >= 0) && (mouseX <= iWidth) && 
		(mouseY >= 0) && (mouseY <= iHeight)) {
		if (state == "pan")
			startPan(e);
		else 
			startZoomBox(e);
			
		return false;
	} else if (zooming) {
		getMouse(e);
		stopZoomBox(e);
	} else if (panning) {
		getMouse(e);
		stopPan(e);
	}
	return true;
}

// move map image with mouse
function panMouse() {
	var xMove = x2-x1;
	var yMove = y2-y1;
	var cLeft = -xMove;
	var cTop = -yMove;
	var cRight = iWidth;
	var cBottom = iHeight;
	if (xMove>0) {
		cLeft = 0;
		cRight = iWidth - xMove;
	}
	if (yMove>0) {
		cTop = 0;
		cBottom = iHeight - yMove;
	}
	clipLayer("theMap",cLeft,cTop,cRight,cBottom);
	moveLayer("theMap",xMove+hspc,yMove+vspc);
	return false;
}

// recenter map is the default option
function recenter(e) {

	// otherwise we don't have these layers
	if (allowRubberband)
		hideZoomBox();
		
	getMapXY(mouseX,mouseY);
	if (mapClickAsRecenter) {
		var widthHalf = Math.abs(maxx - minx) / 2;
		var heightHalf = Math.abs(maxy - miny) / 2;
		newMinx = mapX - widthHalf;
		newMaxx = mapX + widthHalf;
		newMaxy = mapY + heightHalf;
		newMiny = mapY - heightHalf;

		refreshMap(); 
	} else
		customMapClick(mapX,mapY);
}

//Code to handle single mouse click when zooming.
function oneClickZoom(e) {

	// otherwise we don't have these layers
	if (allowRubberband)
		hideZoomBox();
		
	getMapXY(mouseX,mouseY);
	showLayer("loadLayer");
	if (state == "zoomIn") {
	parent.CodeFrame.location.href = "navigate.asp?source=Tools&action=singleZoomIn&x="+mapX.toString()+
		"&y="+mapY.toString()
	}
	if (state == "zoomOut"){
	parent.CodeFrame.location.href = "navigate.asp?source=Tools&action=singleZoomOut&x="+mapX.toString()+
		"&y="+mapY.toString()	
	}
 }

function refreshMap() {
  hideZoomBox();
  showLayer("loadLayer");
  hideLayer("theMap");
  parent.CodeFrame.location.href = "navigate.asp?source=Tools&action="+state+
                      "&MinX="+newMinx.toString()+
                      "&MinY="+newMiny.toString()+
                      "&MaxX="+newMaxx.toString()+
                      "&MaxY="+newMaxy.toString()
}

function sendIdentify(numMapX,numMapY) {

	  showLayer("loadLayer");	
	  parent.CodeFrame.location.href = "identify.asp?source=Identify&x="+numMapX.toString()+
		"&y="+numMapY.toString()
  
}

// clip zoom box layer to mouse coords
function setClip() {	

	if (x1>x2) {
		zmaxx=x1;
		zminx=x2;
	} else {
		zminx=x1;
		zmaxx=x2;
	}
	if (y1>y2) {
		zminy=y1;
		zmaxy=y2;
	} else {
		zmaxy=y1;
		zminy=y2;
	}
	
	if ((x1 != x2) && (y1 != y2)) {
		clipLayer("zoomBoxTop",zminx,zmaxy,zmaxx,zmaxy+zoomBoxWidth);
		clipLayer("zoomBoxLeft",zminx,zmaxy,zminx+zoomBoxWidth,zminy);
		clipLayer("zoomBoxRight",zmaxx-zoomBoxWidth,zmaxy,zmaxx,zminy);
		clipLayer("zoomBoxBottom",zminx,zminy-zoomBoxWidth,zmaxx,zminy);
	}
}

function setExtent(_minx,_miny,_maxx,_maxy) {
	//alert("setExtent "+_minx);
	minx = _minx;
	miny = _miny;
	maxx = _maxx;
	maxy = _maxy;
}

function setState(newState) {
	//alert(newState);
	state = newState;
    if (state == "pan") {
		if (document.getElementById){   // DOM3 = IE5, NS6
				document.getElementById('theTop').style.cursor = "move";
				document.getElementById('theMap').style.cursor = "move";
		}else if (document.layers){   // Netscape 4
				document.theTop.style.cursor = "move";
				document.theMap.style.cursor = "move";
		}else {  // IE 4
				document.all.theTop.style.cursor = "move";
				document.all.theMap.style.cursor = "move";
		}}
	else {
			if (document.getElementById){   // DOM3 = IE5, NS6
				document.getElementById('theTop').style.cursor = "crosshair";
				document.getElementById('theMap').style.cursor = "crosshair";
		}else 	if (document.layers) {  // Netscape 4
				document.theTop.style.cursor = "crosshair";
				document.theMap.style.cursor = "crosshair";
		}else  { // IE 4
				document.all.theTop.style.cursor = "crosshair";
				document.all.theMap.style.cursor = "crosshair";
		}}

	if (state == "zoomIn") {
		mapBoxAsZoom = true;
		setZoomBoxColor("#ff0000");
		setZoomBoxWidth(2);
	} else if (state == "zoomOut") {
		mapBoxAsZoom = true;
		setZoomBoxColor("#ff0000");
		setZoomBoxWidth(2);
	} else if (state == "pan") {
	}
}

function setZoomBoxColor(color) {
	setLayerBackgroundColor("zoomBoxTop", color);
	setLayerBackgroundColor("zoomBoxLeft", color);
	setLayerBackgroundColor("zoomBoxRight", color);
	setLayerBackgroundColor("zoomBoxBottom", color);
}

function setZoomBoxSettings() {

	// Set up event capture for mouse movement
	if (top.isNav && top.is5up) {
		document.captureEvents(Event.MOUSEMOVE);
		document.captureEvents(Event.MOUSEDOWN);
		document.captureEvents(Event.MOUSEUP);
		document.onmousemove = getMouse;
		document.onmousedown = mapTool;
		document.onmouseup = chkMouseUp;
	} else if (top.isNav4) {
		// otherwise the buttons don't work
		getLayer("theTop").captureEvents(Event.MOUSEMOVE);
		getLayer("theTop").captureEvents(Event.MOUSEDOWN);
		getLayer("theTop").captureEvents(Event.MOUSEUP);
		getLayer("theTop").onmousemove = getMouse;
		getLayer("theTop").onmousedown = mapTool;
		getLayer("theTop").onmouseup = chkMouseUp;
	} else {
		document.onmousemove = getMouse;
		document.onmousedown = mapTool;
		document.onmouseup = chkMouseUp;
	}
}
	
function setZoomBoxWidth(size) {
	zoomBoxWidth = size;
}

function showZoomBox() {
	showLayer("zoomBoxTop");
	showLayer("zoomBoxLeft");
	showLayer("zoomBoxRight");
	showLayer("zoomBoxBottom");
}

// start pan.... image will move
function startPan(e) {

	moveLayer("theMap",hspc,vspc);

	getImageXY(e);
	// keep it within the MapImage
	if ((mouseX<iWidth) && (mouseY<iHeight)) {
		if (panning) {
			stopPan(e);
		} else {
			x1=mouseX;
			y1=mouseY
			x2=x1+1;
			y2=y1+1;
			panning=true;
		}
	}
	return false;

}

// start zoom in.... box displayed
function startZoomBox(e) {

	getImageXY(e);	

	if (!allowRubberband) {
		stopZoomBox(e);
	} else {	
		// keep it within the MapImage
		if ((mouseX<iWidth) && (mouseY<iHeight-bottomBorderHeight)) {
			if (!zooming) {
				x1=mouseX;
				y1=mouseY;
				x2=x1+1;
				y2=y1+1;
				zooming=true;
				clipLayer("zoomBoxTop",x1,y1,x2,y2);
				clipLayer("zoomBoxLeft",x1,y1,x2,y2);
				clipLayer("zoomBoxRight",x1,y1,x2,y2);
				clipLayer("zoomBoxBottom",x1,y1,x2,y2);
				showZoomBox();
			}
		} else {
			if (zooming) {
				stopZoomBox(e);
			}
		}
	}
	return false;	
}

// stop moving image.... pan 
function stopPan(e) {

	if ((Math.abs(x2-x1) < 2) && (Math.abs(y2-y1) < 2)) {
		// the move is too small
		center(e);
	} else  {
		window.scrollTo(0,0);
		panning=false;
		var width = Math.abs(maxx - minx);
		var height = Math.abs(maxy - miny);
		var tempLeft=minx;
		var tempRight=maxx;
		var tempTop=maxy;
		var tempBottom=miny;
		var ixOffset = x2-x1;
		var iyOffset = y1-y2;
		pixelX = width / iWidth;
		var theY = iHeight - zmaxy;
		pixelY = height / iHeight;
		var xOffset = pixelX * ixOffset;
		var yOffset = pixelY * iyOffset;
		newMaxy = maxy - yOffset;
		newMaxx = maxx - xOffset;
		newMinx = minx - xOffset;
		newMiny = miny - yOffset;

		// AP specific setting
		attributeUpdate = false;
		
		refreshMap();
		moveLayer("theMap",hspc,vspc);	
		clipLayer("theMap",0,0,iWidth,iHeight);
	}
		
	return true;
	
}

function center(e) {
	
	getMapXY(mouseX,mouseY);
	showLayer("loadLayer");
	panning=false;	
	parent.CodeFrame.location.href = "navigate.asp?source=Tools&action=center&x="+mapX.toString()+"&y="+mapY.toString();
	moveLayer("theMap",hspc,vspc);	
	clipLayer("theMap",0,0,iWidth,iHeight);
	}

// stop zoom box display... zoom in
function stopZoomBox(e) {
	zooming=false;
	if ((zmaxx <zminx+2) && (zmaxy < zminy+2)) {
		// if the zoom box is too small
		oneClickZoom(e);
	} else {
		var width = Math.abs(maxx - minx);
		var height = Math.abs(maxy - miny);
		var pixelX = width / iWidth;
		var theY = iHeight - zmaxy;
		var pixelY = height / iHeight;
		newMaxy = pixelY * theY + miny;
		newMaxx = pixelX * zmaxx + minx;
		newMinx = pixelX * zminx + minx;
		theY = iHeight - zminy;
		pixelY = height / iHeight;
		newMiny = pixelY * theY + miny;

		if (mapBoxAsZoom) {
			if (state == "zoomOut") {
				percentX = (maxx-minx)/(newMaxx-newMinx);
				percentY = (maxy-miny)/(newMaxy-newMiny);
				percent = (percentX+percentY)/2;
				
				widthH = (maxx-minx)/2;
				heightH = (maxy-miny)/2;
				cx = newMinx + widthH;
				cy = newMiny + heightH;
				
				newMinx = cx - percent * widthH;
				newMiny = cy - percent * heightH;
				newMaxx = cx + percent * widthH;
				newMaxy = cy + percent * heightH;
			}
			refreshMap();
		} else
			customMapBox(newMinx, newMiny, newMaxx, newMaxy);
			
	}
	return true;
}

//-------- LAYER SUPPORT FUNCTIONS --------------

// atlas_common.js

// clip layer display to clipleft, cliptip, clipright, clipbottom
function clipLayer(name, clipleft, cliptop, clipright, clipbottom) {		
	var layer = layerGet(name);
	if (top.isNav4) {
		layer.clip.top    = cliptop;
		layer.clip.left   = clipleft;
		layer.clip.right  = clipright;
		layer.clip.bottom = clipbottom;
	} else {
		layer.clip = 'rect(' + cliptop + ' ' +  clipright + ' ' + clipbottom + ' ' + clipleft +')';
	}
}

// Create a DHTML layer
function createLayer(name, left, top, width, height, visible, content) {
	  var layer;
	  if (top.isNav4) {
	    document.writeln('<layer name="' + name + '" left="' + left + '" pagex="' + left + '" pagey=' + top + '" top=' + top + ' width=' + width + ' height=' + height +  ' visibility=' + (visible ? '"show"' : '"hide"') +  '>');
	    document.writeln(content);
	    if (name == "loadLayer") {
	    	document.writeln('&nbsp &nbsp<B><FONT COLOR="#840052" FACE="Arial" SIZE=5>Please Wait<BR>Map Loading...</FONT></B>');
		}
	    document.writeln('</layer>');
	    layer = getLayer(name);
	    layer.width = width;
	    layer.height = height;
	    layer.left = left;
	    layer.top = top;
	  } else {
	    document.writeln('<div id="' + name + '" style="position:absolute; overflow:none; left:' + left + 'px; top:' + top + 'px; width:' + width + 'px; height:' + height + 'px;' + ' z-index:1; visibility:' + (visible ? 'visible;' : 'hidden;') +  '">');
	    document.writeln(content);
	    if (name == "loadLayer") {
	    	document.writeln('&nbsp &nbsp<B><FONT COLOR="#840052" FACE="Arial" SIZE=4>Please Wait<br>Map Loading...</FONT></B>');
		}
	    document.writeln('</div>');
	  }
	  	  clipLayer(name, 0, 0, width, height);
}

// get the layer object called "name"
function getLayer(name) {
	if (top.isNav4) {
		return(document.layers[name]);
	} else if (top.isIE) {
		layer = eval('document.all.' + name + '.style');
		return(layer);
	} else if ((top.isNav) || (top.isNav6) ){
		var theElements = document.getElementsByTagName("div");
		var theObj;
		var j = -1;
		for (i=0;i<theElements.length;i++) {
			if (theElements[i].id==name) theObj = theElements[i].style;
		}
		return theObj;
	} else {
		return(null);
	}
}

// toggle layer to invisible
function hideLayer(name) {		
  	var layer = getLayer(name);		
	if (layer != null) {
	 	if (top.isNav4)
    		layer.visibility = "hide";
		else
   			 layer.visibility = "hidden";
	}
}

// move layer to x,y
// move layer to x,y
function moveLayer(name, x, y) {
	var layer = layerGet(name);
	if (top.isNav4) {
		layer.moveTo(x,y);
	} else {
		layer.left = x;
		layer.top  = y;
		
	}
}

// replace layer's content with new content
function replaceLayerContent(name, content) {
	  if (top.isNav4) {
		    var layer = getLayer(name);
			if (layer != null) {
			    layer.document.open();
			    layer.document.writeln(content);
			    layer.document.close();
			}
	  }  else if (top.isIE) {
			if (eval("document.all." + name) != null) {
		  		content = content.replace(/\'/g,"\\'");
			    var str = "document.all." + name + ".innerHTML = '" + content + "'";
			    eval(str);
			}
	  }
}

// get the layer object called "name"
function layerGet(name) {
	if (top.isNav4) {
		return(document.layers[name]);
	} else if (top.isIE) {
		layer = eval('document.all.' + name + '.style');
		return(layer);
	} else if (top.isNav){
		var theElements = document.getElementsByTagName("div");
		var theObj;
		var j = -1;
		for (i=0;i<theElements.length;i++) {
			if (theElements[i].id==name) theObj = theElements[i].style;
		}
		return theObj;
	} else {
		return(null);
	}
}

// replace layer's content with new content
function layerReplaceContent(name, content) {

	if (top.isNav4) {
		var layer = layerGet(name);
		layer.document.open();
		layer.document.writeln(content);
		layer.document.close();
	} else if (top.isIE) {
		var str = "top.MapFrame.document.all." + name + ".innerHTML = '" + content + "'";
		eval(str);
	}
	else 
	{
		document.getElementById(name).innerHTML = content;
	}
}

// set layer background color
function setLayerBackgroundColor(name, color) {		
  	var layer = getLayer(name);		
	if (layer != null) {
	    if (top.isNav4) 
    		layer.bgColor = color;
		else 
    		layer.backgroundColor = color;
	}
}

// toggle layer to visible
function showLayer(name) {		
  	var layer = getLayer(name);		
	if (layer != null) {
	  	if (top.isNav4)
    		layer.visibility = "show";
		else
   		 	layer.visibility = "visible";
	}
}

// get window width		
function getWinWidth() {
	if (top.isNav) {
		return(window.innerWidth);
	} else if (top.isIE)  {
		return(top.MapFrame.document.body.clientWidth);
	} else {
		return(null)
	}
}

// get window height
function getWinHeight() {
	if (top.isNav4) {
		return(window.innerHeight);
	} else if (top.isIE)  {
		return(top.MapFrame.document.body.clientHeight);
	} else {
		return(null);
	}
}

// resize Map image to current frame size
function resizeMap() {
	iWidth = getWinWidth();
	iHeight = getWinHeight();
	//var hLoad = parseInt(iWidth / 2);
	//var vLoad = parseInt(iHeight /2);
	//var content = '<img src="images/wait.gif" hspace=' + hLoad + ' vspace=' + vLoad + ' border=0 width=90 height=120> ';
	//layerReplaceContent("loadLayer",content);
	showLayer("loadLayer");
	hideLayer("theMap");
	var content = '<img name="theImage" src="images/map.gif" hspace=0 vspace=0 border=0 width=' + iWidth + ' height=' + iHeight + '> ';
	layerReplaceContent("theMap",content);
        parent.CodeFrame.location.href = "navigate.asp?source=Tools&action=resize&mapwidth=" + iWidth + "&mapheight=" + iHeight;
	clipLayer("theMap",0,0,iWidth,iHeight);
}