// JavaScript Document
(function() {
var Dom = YAHOO.util.Dom;
var Event = YAHOO.util.Event;
var DDM = YAHOO.util.DragDropMgr;

//////////////////////////////////////////////////////////////////////////////
// example app
//////////////////////////////////////////////////////////////////////////////
YAHOO.example.DDApp = {
    init: function() {

		if(typeof(G_RECIPE_ROWS)=="undefined")
			G_RECIPE_ROWS = 0;
			
        var rows=G_RECIPE_ROWS,cols=12,i,j;
        for (i=1;i<cols+1;i=i+1) {
            new YAHOO.util.DDTarget("ul"+i);
        }

        for (i=1;i<cols+1;i=i+1) {
            for (j=1;j<rows+1;j=j+1) {
                new YAHOO.example.DDList("li" + i + "_" + j);
            }
        }

        Event.on("showButton", "click", this.showOrder);
        Event.on("switchButton", "click", this.switchStyles);
    },

    showOrder: function() {
        var parseList = function(ul, title) {
            var items = ul.getElementsByTagName("li");
            var out = title;
            for (i=0;i<=items.length;i=i+1) {
                out += items[i].id + " ";
            }
            return out;
        };

        var ul1=Dom.get("ul1");
        alert(parseList(ul1, "List is in the following order:"));

    },

    switchStyles: function() {
        Dom.get("ul1").className = "draglist_alt";
    }
};

//////////////////////////////////////////////////////////////////////////////
// custom drag and drop implementation
//////////////////////////////////////////////////////////////////////////////

YAHOO.example.DDList = function(id, sGroup, config) {

    YAHOO.example.DDList.superclass.constructor.call(this, id, sGroup, config);

    this.logger = this.logger || YAHOO;
    var el = this.getDragEl();
    Dom.setStyle(el, "opacity", 0.67); // The proxy is slightly transparent

    this.goingUp = false;
    this.lastY = 0;
};

YAHOO.extend(YAHOO.example.DDList, YAHOO.util.DDProxy, {

    startDrag: function(x, y) {
        this.logger.log(this.id + " startDrag");

        // make the proxy look like the source element
        var dragEl = this.getDragEl();
        var clickEl = this.getEl();
        Dom.setStyle(clickEl, "visibility", "hidden");
		//========================================================================
		//Hidden button nodes
		//========================================================================		
		try{
			for (var i = 0; i < clickEl.parentNode.childNodes.length; i++){
				var oNode = clickEl.childNodes[i];
				if(oNode.id){
					var oButton = oNode.parentNode.childNodes[BUTTON_POSITION];
					if (oButton){
						oButton.style.display = "inline";
						oButton.style.visibility = "hidden";
					}
				}
			}
		}
		catch (err){
		}
		//============================================================//
		
		Dom.setStyle(dragEl, "color", Dom.getStyle(clickEl, "color"));
        Dom.setStyle(dragEl, "backgroundColor", Dom.getStyle(clickEl, "backgroundColor"));
        Dom.setStyle(dragEl, "border", "2px solid gray");
        Dom.setStyle(dragEl, "fontsize", "11px");
    },

    endDrag: function(e) {
        var srcEl = this.getEl();
        var proxy = this.getDragEl();

        // Show the proxy element and animate it to the src element's location
        Dom.setStyle(proxy, "visibility", "");
        var a = new YAHOO.util.Motion( 
            proxy, { 
                points: { 
                    to: Dom.getXY(srcEl)
                }
            }, 
            0.2, 
            YAHOO.util.Easing.easeOut 
        )
        var proxyid = proxy.id;
        var thisid = this.id;

        // Hide the proxy and show the source element when finished with the animation
        a.onComplete.subscribe(function() {
				
                Dom.setStyle(proxyid, "visibility", "hidden");
				try{
					//var oproxy = document.getElementById(proxyid);
					//oproxy.childNodes[BUTTON_POSITION].style.visibility = "hidden";
					}
				catch (err){}
				Dom.setStyle(thisid, "visibility", "");
				
				//========================================================================
				// Hide or show button depending on the list its parent had been added to
				//
				//========================================================================			
				try{
					var oDest = document.getElementById(thisid).parentNode;
					for (var i = 0; i < oDest.childNodes.length; i++){
						var oNode = oDest.childNodes[i];
						if(oNode.id){
							var oButton = "";
							var sButtonID = "btn_li1_" +  oNode.id.split("_")[1];
							for (var j=0; j < oNode.childNodes.length; j++){
								oButton = oNode.childNodes[j];
								if (oButton.id){
									if (sButtonID = oButton.id){
										if (oDest.id == "ul2"){	
											Dom.setStyle(oButton, "display", "inline");
											Dom.setStyle(oButton, "visibility", "visible");									
											}
										else {
											Dom.setStyle(oButton, "display", "none");
											Dom.setStyle(oButton, "visibility", "hidden");									
										}
									}
								}
							}
						}
					}
				}
				catch (err){
				}
				//========================================================================
            });
		a.animate();

		
    },	

    onDragDrop: function(e, id) {
        // If there is one drop interaction, the li was dropped either on the list,
        // or it was dropped on the current location of the source element.
        if (DDM.interactionInfo.drop.length === 1) {

            // The position of the cursor at the time of the drop (YAHOO.util.Point)
            var pt = DDM.interactionInfo.point; 

            // The region occupied by the source element at the time of the drop
            var region = DDM.interactionInfo.sourceRegion; 

            // Check to see if we are over the source element's location.  We will
            // append to the bottom of the list once we are sure it was a drop in
            // the negative space (the area of the list without any list items)
            if (!region.intersect(pt)) {
                var destEl = Dom.get(id);
                var destDD = DDM.getDDById(id);
                destEl.appendChild(this.getEl());
                destDD.isEmpty = false;
                DDM.refreshCache();
            }
        }
    },

    onDrag: function(e) {

        // Keep track of the direction of the drag for use during onDragOver
        var y = Event.getPageY(e);

        if (y < this.lastY) {
            this.goingUp = true;
        } else if (y > this.lastY) {
            this.goingUp = false;
        }

        this.lastY = y;
    },

    onDragOver: function(e, id) {
    
        var srcEl = this.getEl();
        var destEl = Dom.get(id);

        // We are only concerned with list items, we ignore the dragover
        // notifications for the list.
        if (destEl.nodeName.toLowerCase() == "li") {
            var orig_p = srcEl.parentNode;
            var p = destEl.parentNode;

            if (this.goingUp) {
                p.insertBefore(srcEl, destEl); // insert above
            } else {
                p.insertBefore(srcEl, destEl.nextSibling); // insert below
            }

            DDM.refreshCache();
        }
    }
});
Event.onDOMReady(YAHOO.example.DDApp.init, YAHOO.example.DDApp, true);
})();