lib/dojo/dnd/Manager.js

   1 /*
   2         Copyright (c) 2004-2011, 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 //>>built
   8 define("dojo/dnd/Manager",["../main","../Evented","./common","./autoscroll","./Avatar"],function(_1,_2){var _3=_1.declare("dojo.dnd.Manager",[_2],{constructor:function(){this.avatar=null;this.source=null;this.nodes=[];this.copy=true;this.target=null;this.canDropFlag=false;this.events=[];},OFFSET_X:16,OFFSET_Y:16,overSource:function(_4){if(this.avatar){this.target=(_4&&_4.targetState!="Disabled")?_4:null;this.canDropFlag=Boolean(this.target);this.avatar.update();}_1.publish("/dnd/source/over",[_4]);},outSource:function(_5){if(this.avatar){if(this.target==_5){this.target=null;this.canDropFlag=false;this.avatar.update();_1.publish("/dnd/source/over",[null]);}}else{_1.publish("/dnd/source/over",[null]);}},startDrag:function(_6,_7,_8){this.source=_6;this.nodes=_7;this.copy=Boolean(_8);this.avatar=this.makeAvatar();_1.body().appendChild(this.avatar.node);_1.publish("/dnd/start",[_6,_7,this.copy]);this.events=[_1.connect(_1.doc,"onmousemove",this,"onMouseMove"),_1.connect(_1.doc,"onmouseup",this,"onMouseUp"),_1.connect(_1.doc,"onkeydown",this,"onKeyDown"),_1.connect(_1.doc,"onkeyup",this,"onKeyUp"),_1.connect(_1.doc,"ondragstart",_1.stopEvent),_1.connect(_1.body(),"onselectstart",_1.stopEvent)];var c="dojoDnd"+(_8?"Copy":"Move");_1.addClass(_1.body(),c);},canDrop:function(_9){var _a=Boolean(this.target&&_9);if(this.canDropFlag!=_a){this.canDropFlag=_a;this.avatar.update();}},stopDrag:function(){_1.removeClass(_1.body(),["dojoDndCopy","dojoDndMove"]);_1.forEach(this.events,_1.disconnect);this.events=[];this.avatar.destroy();this.avatar=null;this.source=this.target=null;this.nodes=[];},makeAvatar:function(){return new _1.dnd.Avatar(this);},updateAvatar:function(){this.avatar.update();},onMouseMove:function(e){var a=this.avatar;if(a){_1.dnd.autoScrollNodes(e);var s=a.node.style;s.left=(e.pageX+this.OFFSET_X)+"px";s.top=(e.pageY+this.OFFSET_Y)+"px";var _b=Boolean(this.source.copyState(_1.isCopyKey(e)));if(this.copy!=_b){this._setCopyStatus(_b);}}},onMouseUp:function(e){if(this.avatar){if(this.target&&this.canDropFlag){var _c=Boolean(this.source.copyState(_1.isCopyKey(e))),_d=[this.source,this.nodes,_c,this.target,e];_1.publish("/dnd/drop/before",_d);_1.publish("/dnd/drop",_d);}else{_1.publish("/dnd/cancel");}this.stopDrag();}},onKeyDown:function(e){if(this.avatar){switch(e.keyCode){case _1.keys.CTRL:var _e=Boolean(this.source.copyState(true));if(this.copy!=_e){this._setCopyStatus(_e);}break;case _1.keys.ESCAPE:_1.publish("/dnd/cancel");this.stopDrag();break;}}},onKeyUp:function(e){if(this.avatar&&e.keyCode==_1.keys.CTRL){var _f=Boolean(this.source.copyState(false));if(this.copy!=_f){this._setCopyStatus(_f);}}},_setCopyStatus:function(_10){this.copy=_10;this.source._markDndStatus(this.copy);this.updateAvatar();_1.replaceClass(_1.body(),"dojoDnd"+(this.copy?"Copy":"Move"),"dojoDnd"+(this.copy?"Move":"Copy"));}});_1.dnd._manager=null;_3.manager=_1.dnd.manager=function(){if(!_1.dnd._manager){_1.dnd._manager=new _1.dnd.Manager();}return _1.dnd._manager;};return _3;});