source: Dev/trunk/src/client/dojox/mdnd/DropIndicator.js

define(["dojo/_base/kernel",
        "dojo/_base/declare",
        "dojo/dom-class",
        "dojo/dom-construct",
        "./AreaManager"
], function(dojo, declare, domClass, domConstruct){
        var di = declare(
                "dojox.mdnd.DropIndicator",
                null,
        {
                // summary:
                //              DropIndicator managment for DnD.
        
                // node: DOMNode
                //              the drop indicator node
                node : null,
                        
                constructor: function(){
                        //console.log("dojox.mdnd.DropIndicator ::: constructor");
                        var dropIndicator = document.createElement("div");
                        var subDropIndicator = document.createElement("div");
                        dropIndicator.appendChild(subDropIndicator);
                        domClass.add(dropIndicator, "dropIndicator");
                        this.node = dropIndicator;
                },
                
                place: function(/*Node*/area, /*Node*/nodeRef, /*Object*/size){
                        // summary:
                        //              Place the DropIndicator in the right place
                        // area:
                        //              the dnd targer area node
                        // nodeRef:
                        //              node where the dropIndicator have to be placed into the area
                        // dragNode:
                        //              the node which is dragged
                        // returns:
                        //              the node inserted or null if it crashes
        
                        //console.log("dojox.mdnd.DropIndicator ::: place");
                        if(size){
                                this.node.style.height = size.h + "px";
                        }
                        try{
                                if(nodeRef){
                                        area.insertBefore(this.node, nodeRef);
                                }
                                else{
                                        // empty target area or last node => appendChild
                                        area.appendChild(this.node);
                                }
                                return this.node;       // DOMNode
                        }catch(e){
                                return null;
                        }
                },
                
                remove: function(){
                        // summary:
                        //              remove the DropIndicator (not destroy)
        
                        //console.log("dojox.mdnd.DropIndicator ::: remove");
                        if(this.node){
                                //FIX : IE6 problem
                                this.node.style.height = "";
                                if(this.node.parentNode){
                                        this.node.parentNode.removeChild(this.node);
                                }
                        }
                },
                 
                destroy: function(){
                        // summary:
                        //              destroy the dropIndicator
        
                        //console.log("dojox.mdnd.DropIndicator ::: destroy");
                        if(this.node){
                                if(this.node.parentNode){
                                        this.node.parentNode.removeChild(this.node);
                                }
                                domConstruct.destroy(this.node);
                                delete this.node;
                        }
                }
        });

        dojox.mdnd.areaManager()._dropIndicator = new dojox.mdnd.DropIndicator();
        
        return di;
});