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mathias |
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if(!dojo._hasResource["dojo.dnd.Avatar"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["dojo.dnd.Avatar"] = true;
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dojo.provide("dojo.dnd.Avatar");
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dojo.require("dojo.dnd.common");
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dojo.dnd.Avatar = function(manager){
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// summary: an object, which represents transferred DnD items visually
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// manager: Object: a DnD manager object
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this.manager = manager;
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this.construct();
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};
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dojo.extend(dojo.dnd.Avatar, {
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construct: function(){
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// summary: a constructor function;
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// it is separate so it can be (dynamically) overwritten in case of need
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var a = dojo.doc.createElement("table");
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a.className = "dojoDndAvatar";
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a.style.position = "absolute";
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a.style.zIndex = 1999;
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a.style.margin = "0px"; // to avoid dojo.marginBox() problems with table's margins
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var b = dojo.doc.createElement("tbody");
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var tr = dojo.doc.createElement("tr");
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tr.className = "dojoDndAvatarHeader";
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var td = dojo.doc.createElement("td");
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td.innerHTML = this._generateText();
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tr.appendChild(td);
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dojo.style(tr, "opacity", 0.9);
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b.appendChild(tr);
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var k = Math.min(5, this.manager.nodes.length);
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var source = this.manager.source;
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for(var i = 0; i < k; ++i){
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tr = dojo.doc.createElement("tr");
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tr.className = "dojoDndAvatarItem";
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td = dojo.doc.createElement("td");
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var node = source.creator ?
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// create an avatar representation of the node
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node = source._normalizedCreator(source.getItem(this.manager.nodes[i].id).data, "avatar").node :
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// or just clone the node and hope it works
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node = this.manager.nodes[i].cloneNode(true);
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node.id = "";
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td.appendChild(node);
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tr.appendChild(td);
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dojo.style(tr, "opacity", (9 - i) / 10);
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b.appendChild(tr);
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}
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a.appendChild(b);
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this.node = a;
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},
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destroy: function(){
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// summary: a desctructor for the avatar, called to remove all references so it can be garbage-collected
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dojo._destroyElement(this.node);
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this.node = false;
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},
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update: function(){
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// summary: updates the avatar to reflect the current DnD state
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dojo[(this.manager.canDropFlag ? "add" : "remove") + "Class"](this.node, "dojoDndAvatarCanDrop");
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// replace text
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var t = this.node.getElementsByTagName("td");
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for(var i = 0; i < t.length; ++i){
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var n = t[i];
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if(dojo.hasClass(n.parentNode, "dojoDndAvatarHeader")){
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n.innerHTML = this._generateText();
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break;
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}
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}
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},
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_generateText: function(){
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// summary: generates a proper text to reflect copying or moving of items
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return this.manager.nodes.length.toString();
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}
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});
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}
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