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+if(!dojo._hasResource["dojo.dnd.Manager"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojo.dnd.Manager"] = true;
+dojo.provide("dojo.dnd.Manager");
+
+dojo.require("dojo.dnd.common");
+dojo.require("dojo.dnd.autoscroll");
+dojo.require("dojo.dnd.Avatar");
+
+dojo.declare("dojo.dnd.Manager", null, {
+ // summary: the manager of DnD operations (usually a singleton)
+ constructor: function(){
+ this.avatar = null;
+ this.source = null;
+ this.nodes = [];
+ this.copy = true;
+ this.target = null;
+ this.canDropFlag = false;
+ this.events = [];
+ },
+
+ // avatar's offset from the mouse
+ OFFSET_X: 16,
+ OFFSET_Y: 16,
+
+ // methods
+ overSource: function(source){
+ // summary: called when a source detected a mouse-over conditiion
+ // source: Object: the reporter
+ if(this.avatar){
+ this.target = (source && source.targetState != "Disabled") ? source : null;
+ this.avatar.update();
+ }
+ dojo.publish("/dnd/source/over", [source]);
+ },
+ outSource: function(source){
+ // summary: called when a source detected a mouse-out conditiion
+ // source: Object: the reporter
+ if(this.avatar){
+ if(this.target == source){
+ this.target = null;
+ this.canDropFlag = false;
+ this.avatar.update();
+ dojo.publish("/dnd/source/over", [null]);
+ }
+ }else{
+ dojo.publish("/dnd/source/over", [null]);
+ }
+ },
+ startDrag: function(source, nodes, copy){
+ // summary: called to initiate the DnD operation
+ // source: Object: the source which provides items
+ // nodes: Array: the list of transferred items
+ // copy: Boolean: copy items, if true, move items otherwise
+ this.source = source;
+ this.nodes = nodes;
+ this.copy = Boolean(copy); // normalizing to true boolean
+ this.avatar = this.makeAvatar();
+ dojo.body().appendChild(this.avatar.node);
+ dojo.publish("/dnd/start", [source, nodes, this.copy]);
+ 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")
+ ];
+ var c = "dojoDnd" + (copy ? "Copy" : "Move");
+ dojo.addClass(dojo.body(), c);
+ },
+ canDrop: function(flag){
+ // summary: called to notify if the current target can accept items
+ var canDropFlag = Boolean(this.target && flag);
+ if(this.canDropFlag != canDropFlag){
+ this.canDropFlag = canDropFlag;
+ this.avatar.update();
+ }
+ },
+ stopDrag: function(){
+ // summary: stop the DnD in progress
+ dojo.removeClass(dojo.body(), "dojoDndCopy");
+ dojo.removeClass(dojo.body(), "dojoDndMove");
+ dojo.forEach(this.events, dojo.disconnect);
+ this.events = [];
+ this.avatar.destroy();
+ this.avatar = null;
+ this.source = null;
+ this.nodes = [];
+ },
+ makeAvatar: function(){
+ // summary: makes the avatar, it is separate to be overwritten dynamically, if needed
+ return new dojo.dnd.Avatar(this);
+ },
+ updateAvatar: function(){
+ // summary: updates the avatar, it is separate to be overwritten dynamically, if needed
+ this.avatar.update();
+ },
+ // mouse event processors
+ onMouseMove: function(e){
+ // summary: event processor for onmousemove
+ // e: Event: mouse event
+ var a = this.avatar;
+ if(a){
+ //dojo.dnd.autoScrollNodes(e);
+ dojo.dnd.autoScroll(e);
+ var s = a.node.style;
+ s.left = (e.pageX + this.OFFSET_X) + "px";
+ s.top = (e.pageY + this.OFFSET_Y) + "px";
+ var copy = Boolean(this.source.copyState(dojo.dnd.getCopyKeyState(e)));
+ if(this.copy != copy){
+ this._setCopyStatus(copy);
+ }
+ }
+ },
+ onMouseUp: function(e){
+ // summary: event processor for onmouseup
+ // e: Event: mouse event
+ if(this.avatar && (!("mouseButton" in this.source) || this.source.mouseButton == e.button)){
+ if(this.target && this.canDropFlag){
+ var params = [this.source, this.nodes, Boolean(this.source.copyState(dojo.dnd.getCopyKeyState(e))), this.target];
+ dojo.publish("/dnd/drop/before", params);
+ dojo.publish("/dnd/drop", params);
+ }else{
+ dojo.publish("/dnd/cancel");
+ }
+ this.stopDrag();
+ }
+ },
+ // keyboard event processors
+ onKeyDown: function(e){
+ // summary: event processor for onkeydown:
+ // watching for CTRL for copy/move status, watching for ESCAPE to cancel the drag
+ // e: Event: keyboard event
+ if(this.avatar){
+ switch(e.keyCode){
+ case dojo.keys.CTRL:
+ var copy = Boolean(this.source.copyState(true));
+ if(this.copy != copy){
+ this._setCopyStatus(copy);
+ }
+ break;
+ case dojo.keys.ESCAPE:
+ dojo.publish("/dnd/cancel");
+ this.stopDrag();
+ break;
+ }
+ }
+ },
+ onKeyUp: function(e){
+ // summary: event processor for onkeyup, watching for CTRL for copy/move status
+ // e: Event: keyboard event
+ if(this.avatar && e.keyCode == dojo.keys.CTRL){
+ var copy = Boolean(this.source.copyState(false));
+ if(this.copy != copy){
+ this._setCopyStatus(copy);
+ }
+ }
+ },
+ // utilities
+ _setCopyStatus: function(copy){
+ // summary: changes the copy status
+ // copy: Boolean: the copy status
+ this.copy = copy;
+ this.source._markDndStatus(this.copy);
+ this.updateAvatar();
+ dojo.removeClass(dojo.body(), "dojoDnd" + (this.copy ? "Move" : "Copy"));
+ dojo.addClass(dojo.body(), "dojoDnd" + (this.copy ? "Copy" : "Move"));
+ }
+});
+
+// summary: the manager singleton variable, can be overwritten, if needed
+dojo.dnd._manager = null;
+
+dojo.dnd.manager = function(){
+ // summary: returns the current DnD manager, creates one if it is not created yet
+ if(!dojo.dnd._manager){
+ dojo.dnd._manager = new dojo.dnd.Manager();
+ }
+ return dojo.dnd._manager; // Object
+};
+
+}