lib/dojo/dnd/Manager.js

   1 /*
   2         Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
   3         Available via Academic Free License >= 2.1 OR the modified BSD license.
   4         see: http://dojotoolkit.org/license for details
   5 */
   6
   7
   8 if(!dojo._hasResource["dojo.dnd.Manager"]){
   9 dojo._hasResource["dojo.dnd.Manager"]=true;
  10 dojo.provide("dojo.dnd.Manager");
  11 dojo.require("dojo.dnd.common");
  12 dojo.require("dojo.dnd.autoscroll");
  13 dojo.require("dojo.dnd.Avatar");
  14 dojo.declare("dojo.dnd.Manager",null,{constructor:function(){
  15 this.avatar=null;
  16 this.source=null;
  17 this.nodes=[];
  18 this.copy=true;
  19 this.target=null;
  20 this.canDropFlag=false;
  21 this.events=[];
  22 },OFFSET_X:16,OFFSET_Y:16,overSource:function(_1){
  23 if(this.avatar){
  24 this.target=(_1&&_1.targetState!="Disabled")?_1:null;
  25 this.canDropFlag=Boolean(this.target);
  26 this.avatar.update();
  27 }
  28 dojo.publish("/dnd/source/over",[_1]);
  29 },outSource:function(_2){
  30 if(this.avatar){
  31 if(this.target==_2){
  32 this.target=null;
  33 this.canDropFlag=false;
  34 this.avatar.update();
  35 dojo.publish("/dnd/source/over",[null]);
  36 }
  37 }else{
  38 dojo.publish("/dnd/source/over",[null]);
  39 }
  40 },startDrag:function(_3,_4,_5){
  41 this.source=_3;
  42 this.nodes=_4;
  43 this.copy=Boolean(_5);
  44 this.avatar=this.makeAvatar();
  45 dojo.body().appendChild(this.avatar.node);
  46 dojo.publish("/dnd/start",[_3,_4,this.copy]);
  47 this.events=[dojo.connect(dojo.doc,"onmousemove",this,"onMouseMove"),dojo.connect(dojo.doc,"onmouseup",this,"onMouseUp"),dojo.connect(dojo.doc,"onkeydown",this,"onKeyDown"),dojo.connect(dojo.doc,"onkeyup",this,"onKeyUp"),dojo.connect(dojo.doc,"ondragstart",dojo.stopEvent),dojo.connect(dojo.body(),"onselectstart",dojo.stopEvent)];
  48 var c="dojoDnd"+(_5?"Copy":"Move");
  49 dojo.addClass(dojo.body(),c);
  50 },canDrop:function(_6){
  51 var _7=Boolean(this.target&&_6);
  52 if(this.canDropFlag!=_7){
  53 this.canDropFlag=_7;
  54 this.avatar.update();
  55 }
  56 },stopDrag:function(){
  57 dojo.removeClass(dojo.body(),"dojoDndCopy");
  58 dojo.removeClass(dojo.body(),"dojoDndMove");
  59 dojo.forEach(this.events,dojo.disconnect);
  60 this.events=[];
  61 this.avatar.destroy();
  62 this.avatar=null;
  63 this.source=this.target=null;
  64 this.nodes=[];
  65 },makeAvatar:function(){
  66 return new dojo.dnd.Avatar(this);
  67 },updateAvatar:function(){
  68 this.avatar.update();
  69 },onMouseMove:function(e){
  70 var a=this.avatar;
  71 if(a){
  72 dojo.dnd.autoScrollNodes(e);
  73 var s=a.node.style;
  74 s.left=(e.pageX+this.OFFSET_X)+"px";
  75 s.top=(e.pageY+this.OFFSET_Y)+"px";
  76 var _8=Boolean(this.source.copyState(dojo.isCopyKey(e)));
  77 if(this.copy!=_8){
  78 this._setCopyStatus(_8);
  79 }
  80 }
  81 },onMouseUp:function(e){
  82 if(this.avatar){
  83 if(this.target&&this.canDropFlag){
  84 var _9=Boolean(this.source.copyState(dojo.isCopyKey(e))),_a=[this.source,this.nodes,_9,this.target,e];
  85 dojo.publish("/dnd/drop/before",_a);
  86 dojo.publish("/dnd/drop",_a);
  87 }else{
  88 dojo.publish("/dnd/cancel");
  89 }
  90 this.stopDrag();
  91 }
  92 },onKeyDown:function(e){
  93 if(this.avatar){
  94 switch(e.keyCode){
  95 case dojo.keys.CTRL:
  96 var _b=Boolean(this.source.copyState(true));
  97 if(this.copy!=_b){
  98 this._setCopyStatus(_b);
  99 }
 100 break;
 101 case dojo.keys.ESCAPE:
 102 dojo.publish("/dnd/cancel");
 103 this.stopDrag();
 104 break;
 105 }
 106 }
 107 },onKeyUp:function(e){
 108 if(this.avatar&&e.keyCode==dojo.keys.CTRL){
 109 var _c=Boolean(this.source.copyState(false));
 110 if(this.copy!=_c){
 111 this._setCopyStatus(_c);
 112 }
 113 }
 114 },_setCopyStatus:function(_d){
 115 this.copy=_d;
 116 this.source._markDndStatus(this.copy);
 117 this.updateAvatar();
 118 dojo.removeClass(dojo.body(),"dojoDnd"+(this.copy?"Move":"Copy"));
 119 dojo.addClass(dojo.body(),"dojoDnd"+(this.copy?"Copy":"Move"));
 120 }});
 121 dojo.dnd._manager=null;
 122 dojo.dnd.manager=function(){
 123 if(!dojo.dnd._manager){
 124 dojo.dnd._manager=new dojo.dnd.Manager();
 125 }
 126 return dojo.dnd._manager;
 127 };
 128 }