git.pond.sub.org Git - eow/blob - static/dojo-release-1.1.1/dojo/dnd/Avatar.js

   1 if(!dojo._hasResource["dojo.dnd.Avatar"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
   2 dojo._hasResource["dojo.dnd.Avatar"] = true;
   3 dojo.provide("dojo.dnd.Avatar");
   4
   5 dojo.require("dojo.dnd.common");
   6
   7 dojo.declare("dojo.dnd.Avatar", null, {
   8         // summary: an object, which represents transferred DnD items visually
   9         // manager: Object: a DnD manager object
  10
  11         constructor: function(manager){
  12                 this.manager = manager;
  13                 this.construct();
  14         },
  15
  16         // methods
  17         construct: function(){
  18                 // summary: a constructor function;
  19                 //      it is separate so it can be (dynamically) overwritten in case of need
  20                 var a = dojo.doc.createElement("table");
  21                 a.className = "dojoDndAvatar";
  22                 a.style.position = "absolute";
  23                 a.style.zIndex = 1999;
  24                 a.style.margin = "0px"; // to avoid dojo.marginBox() problems with table's margins
  25                 var b = dojo.doc.createElement("tbody");
  26                 var tr = dojo.doc.createElement("tr");
  27                 tr.className = "dojoDndAvatarHeader";
  28                 var td = dojo.doc.createElement("td");
  29                 td.innerHTML = this._generateText();
  30                 tr.appendChild(td);
  31                 dojo.style(tr, "opacity", 0.9);
  32                 b.appendChild(tr);
  33                 var k = Math.min(5, this.manager.nodes.length);
  34                 var source = this.manager.source;
  35                 for(var i = 0; i < k; ++i){
  36                         tr = dojo.doc.createElement("tr");
  37                         tr.className = "dojoDndAvatarItem";
  38                         td = dojo.doc.createElement("td");
  39                         if(source.creator){
  40                                 // create an avatar representation of the node
  41                                 node = source._normalizedCreator(source.getItem(this.manager.nodes[i].id).data, "avatar").node;
  42                         }else{
  43                                 // or just clone the node and hope it works
  44                                 node = this.manager.nodes[i].cloneNode(true);
  45                                 if(node.tagName.toLowerCase() == "tr"){
  46                                         // insert extra table nodes
  47                                         var table = dojo.doc.createElement("table"),
  48                                                 tbody = dojo.doc.createElement("tbody");
  49                                         tbody.appendChild(node);
  50                                         table.appendChild(tbody);
  51                                         node = table;
  52                                 }
  53                         }
  54                         node.id = "";
  55                         td.appendChild(node);
  56                         tr.appendChild(td);
  57                         dojo.style(tr, "opacity", (9 - i) / 10);
  58                         b.appendChild(tr);
  59                 }
  60                 a.appendChild(b);
  61                 this.node = a;
  62         },
  63         destroy: function(){
  64                 // summary: a desctructor for the avatar, called to remove all references so it can be garbage-collected
  65                 dojo._destroyElement(this.node);
  66                 this.node = false;
  67         },
  68         update: function(){
  69                 // summary: updates the avatar to reflect the current DnD state
  70                 dojo[(this.manager.canDropFlag ? "add" : "remove") + "Class"](this.node, "dojoDndAvatarCanDrop");
  71                 // replace text
  72                 dojo.query("tr.dojoDndAvatarHeader td").forEach(function(node){
  73                         node.innerHTML = this._generateText();
  74                 }, this);
  75         },
  76         _generateText: function(){
  77                 // summary: generates a proper text to reflect copying or moving of items
  78                 return this.manager.nodes.length.toString();
  79         }
  80 });
  81
  82 }