+++ /dev/null
-define("dojo/dnd/Manager", ["../main", "../Evented", "./common", "./autoscroll", "./Avatar"], function(dojo, Evented) {
- // module:
- // dojo/dnd/Manager
- // summary:
- // TODOC
-
-
-var Manager = dojo.declare("dojo.dnd.Manager", [Evented], {
- // 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 condition
- // source: Object
- // the reporter
- if(this.avatar){
- this.target = (source && source.targetState != "Disabled") ? source : null;
- this.canDropFlag = Boolean(this.target);
- this.avatar.update();
- }
- dojo.publish("/dnd/source/over", [source]);
- },
- outSource: function(source){
- // summary:
- // called when a source detected a mouse-out condition
- // 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"),
- // cancel text selection and text dragging
- dojo.connect(dojo.doc, "ondragstart", dojo.stopEvent),
- dojo.connect(dojo.body(), "onselectstart", dojo.stopEvent)
- ];
- 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", "dojoDndMove"]);
- dojo.forEach(this.events, dojo.disconnect);
- this.events = [];
- this.avatar.destroy();
- this.avatar = null;
- this.source = this.target = 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.isCopyKey(e)));
- if(this.copy != copy){
- this._setCopyStatus(copy);
- }
- }
- },
- onMouseUp: function(e){
- // summary:
- // event processor for onmouseup
- // e: Event
- // mouse event
- if(this.avatar){
- if(this.target && this.canDropFlag){
- var copy = Boolean(this.source.copyState(dojo.isCopyKey(e))),
- params = [this.source, this.nodes, copy, this.target, e];
- 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.replaceClass(dojo.body(),
- "dojoDnd" + (this.copy ? "Copy" : "Move"),
- "dojoDnd" + (this.copy ? "Move" : "Copy"));
- }
-});
-
-// dojo.dnd._manager:
-// The manager singleton variable. Can be overwritten if needed.
-dojo.dnd._manager = null;
-
-Manager.manager = 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
-};
-
-return Manager;
-});
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