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upgrade dojo to 1.8.3 (refs #570)
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Andrew Dolgov
223
lib/dojo/dnd/Manager.js.uncompressed.js
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223
lib/dojo/dnd/Manager.js.uncompressed.js
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define("dojo/dnd/Manager", [
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"../_base/array", "../_base/declare", "../_base/event", "../_base/lang", "../_base/window",
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"../dom-class", "../Evented", "../has", "../keys", "../on", "../topic", "../touch",
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"./common", "./autoscroll", "./Avatar"
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], function(array, declare, event, lang, win, domClass, Evented, has, keys, on, topic, touch,
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dnd, autoscroll, Avatar){
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// module:
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// dojo/dnd/Manager
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var Manager = declare("dojo.dnd.Manager", [Evented], {
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// summary:
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// the manager of DnD operations (usually a singleton)
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constructor: function(){
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this.avatar = null;
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this.source = null;
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this.nodes = [];
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this.copy = true;
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this.target = null;
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this.canDropFlag = false;
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this.events = [];
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},
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// avatar's offset from the mouse
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OFFSET_X: has("touch") ? 0 : 16,
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OFFSET_Y: has("touch") ? -64 : 16,
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// methods
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overSource: function(source){
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// summary:
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// called when a source detected a mouse-over condition
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// source: Object
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// the reporter
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if(this.avatar){
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this.target = (source && source.targetState != "Disabled") ? source : null;
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this.canDropFlag = Boolean(this.target);
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this.avatar.update();
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}
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topic.publish("/dnd/source/over", source);
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},
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outSource: function(source){
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// summary:
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// called when a source detected a mouse-out condition
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// source: Object
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// the reporter
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if(this.avatar){
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if(this.target == source){
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this.target = null;
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this.canDropFlag = false;
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this.avatar.update();
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topic.publish("/dnd/source/over", null);
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}
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}else{
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topic.publish("/dnd/source/over", null);
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}
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},
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startDrag: function(source, nodes, copy){
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// summary:
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// called to initiate the DnD operation
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// source: Object
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// the source which provides items
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// nodes: Array
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// the list of transferred items
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// copy: Boolean
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// copy items, if true, move items otherwise
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// Tell autoscroll that a drag is starting
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autoscroll.autoScrollStart(win.doc);
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this.source = source;
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this.nodes = nodes;
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this.copy = Boolean(copy); // normalizing to true boolean
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this.avatar = this.makeAvatar();
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win.body().appendChild(this.avatar.node);
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topic.publish("/dnd/start", source, nodes, this.copy);
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this.events = [
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on(win.doc, touch.move, lang.hitch(this, "onMouseMove")),
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on(win.doc, touch.release, lang.hitch(this, "onMouseUp")),
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on(win.doc, "keydown", lang.hitch(this, "onKeyDown")),
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on(win.doc, "keyup", lang.hitch(this, "onKeyUp")),
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// cancel text selection and text dragging
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on(win.doc, "dragstart", event.stop),
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on(win.body(), "selectstart", event.stop)
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];
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var c = "dojoDnd" + (copy ? "Copy" : "Move");
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domClass.add(win.body(), c);
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},
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canDrop: function(flag){
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// summary:
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// called to notify if the current target can accept items
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var canDropFlag = Boolean(this.target && flag);
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if(this.canDropFlag != canDropFlag){
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this.canDropFlag = canDropFlag;
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this.avatar.update();
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}
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},
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stopDrag: function(){
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// summary:
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// stop the DnD in progress
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domClass.remove(win.body(), ["dojoDndCopy", "dojoDndMove"]);
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array.forEach(this.events, function(handle){ handle.remove(); });
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this.events = [];
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this.avatar.destroy();
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this.avatar = null;
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this.source = this.target = null;
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this.nodes = [];
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},
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makeAvatar: function(){
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// summary:
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// makes the avatar; it is separate to be overwritten dynamically, if needed
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return new Avatar(this);
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},
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updateAvatar: function(){
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// summary:
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// updates the avatar; it is separate to be overwritten dynamically, if needed
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this.avatar.update();
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},
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// mouse event processors
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onMouseMove: function(e){
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// summary:
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// event processor for onmousemove
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// e: Event
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// mouse event
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var a = this.avatar;
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if(a){
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autoscroll.autoScrollNodes(e);
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//autoscroll.autoScroll(e);
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var s = a.node.style;
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s.left = (e.pageX + this.OFFSET_X) + "px";
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s.top = (e.pageY + this.OFFSET_Y) + "px";
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var copy = Boolean(this.source.copyState(dnd.getCopyKeyState(e)));
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if(this.copy != copy){
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this._setCopyStatus(copy);
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}
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}
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if(has("touch")){
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// Prevent page from scrolling so that user can drag instead.
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e.preventDefault();
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}
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},
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onMouseUp: function(e){
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// summary:
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// event processor for onmouseup
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// e: Event
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// mouse event
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if(this.avatar){
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if(this.target && this.canDropFlag){
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var copy = Boolean(this.source.copyState(dnd.getCopyKeyState(e)));
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topic.publish("/dnd/drop/before", this.source, this.nodes, copy, this.target, e);
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topic.publish("/dnd/drop", this.source, this.nodes, copy, this.target, e);
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}else{
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topic.publish("/dnd/cancel");
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}
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this.stopDrag();
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}
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},
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// keyboard event processors
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onKeyDown: function(e){
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// summary:
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// event processor for onkeydown:
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// watching for CTRL for copy/move status, watching for ESCAPE to cancel the drag
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// e: Event
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// keyboard event
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if(this.avatar){
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switch(e.keyCode){
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case keys.CTRL:
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var copy = Boolean(this.source.copyState(true));
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if(this.copy != copy){
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this._setCopyStatus(copy);
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}
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break;
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case keys.ESCAPE:
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topic.publish("/dnd/cancel");
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this.stopDrag();
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break;
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}
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}
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},
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onKeyUp: function(e){
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// summary:
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// event processor for onkeyup, watching for CTRL for copy/move status
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// e: Event
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// keyboard event
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if(this.avatar && e.keyCode == keys.CTRL){
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var copy = Boolean(this.source.copyState(false));
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if(this.copy != copy){
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this._setCopyStatus(copy);
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}
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}
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},
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// utilities
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_setCopyStatus: function(copy){
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// summary:
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// changes the copy status
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// copy: Boolean
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// the copy status
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this.copy = copy;
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this.source._markDndStatus(this.copy);
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this.updateAvatar();
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domClass.replace(win.body(),
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"dojoDnd" + (this.copy ? "Copy" : "Move"),
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"dojoDnd" + (this.copy ? "Move" : "Copy"));
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}
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});
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// dnd._manager:
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// The manager singleton variable. Can be overwritten if needed.
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dnd._manager = null;
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Manager.manager = dnd.manager = function(){
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// summary:
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// Returns the current DnD manager. Creates one if it is not created yet.
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if(!dnd._manager){
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dnd._manager = new Manager();
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}
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return dnd._manager; // Object
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};
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return Manager;
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});
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