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

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Avatar.js (2 KB)

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