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authormensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
committermensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
commite44a7e37b6c7b5961adaffc62b9042b8d442938e (patch)
tree95b67c356e93163467db2451f2b8cce84ed5d582 /includes/js/dojo/dnd/Source.js
parenta62b9742ee5e28bcec6872d88f50f25b820914f6 (diff)
downloadsemanticscuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.tar.gz
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New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
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+if(!dojo._hasResource["dojo.dnd.Source"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojo.dnd.Source"] = true;
+dojo.provide("dojo.dnd.Source");
+
+dojo.require("dojo.dnd.Selector");
+dojo.require("dojo.dnd.Manager");
+
+/*
+ Container property:
+ "Horizontal"- if this is the horizontal container
+ Source states:
+ "" - normal state
+ "Moved" - this source is being moved
+ "Copied" - this source is being copied
+ Target states:
+ "" - normal state
+ "Disabled" - the target cannot accept an avatar
+ Target anchor state:
+ "" - item is not selected
+ "Before" - insert point is before the anchor
+ "After" - insert point is after the anchor
+*/
+
+/*=====
+dojo.dnd.__SourceArgs = function(){
+ // summary:
+ // a dict of parameters for DnD Source configuration. Note that any
+ // property on Source elements may be configured, but this is the
+ // short-list
+ // isSource: Boolean?
+ // can be used as a DnD source. Defaults to true.
+ // accept: Array?
+ // list of accepted types (text strings) for a target; defaults to
+ // ["text"]
+ // horizontal: Boolean?
+ // a horizontal container, if true, vertical otherwise or when omitted
+ // copyOnly: Boolean?
+ // always copy items, if true, use a state of Ctrl key otherwise
+ // withHandles: Boolean?
+ // allows dragging only by handles
+ this.isSource = isSource;
+ this.accept = accept;
+ this.horizontal = horizontal;
+ this.copyOnly = copyOnly;
+ this.withHandles = withHandles;
+}
+=====*/
+
+dojo.declare("dojo.dnd.Source", dojo.dnd.Selector, {
+ // summary: a Source object, which can be used as a DnD source, or a DnD target
+
+ // object attributes (for markup)
+ isSource: true,
+ horizontal: false,
+ copyOnly: false,
+ skipForm: false,
+ withHandles: false,
+ accept: ["text"],
+
+ constructor: function(/*DOMNode|String*/node, /*dojo.dnd.__SourceArgs?*/params){
+ // summary:
+ // a constructor of the Source
+ // node:
+ // node or node's id to build the source on
+ // params:
+ // any property of this class may be configured via the params
+ // object which is mixed-in to the `dojo.dnd.Source` instance
+ dojo.mixin(this, dojo.mixin({}, params));
+ var type = this.accept;
+ if(type.length){
+ this.accept = {};
+ for(var i = 0; i < type.length; ++i){
+ this.accept[type[i]] = 1;
+ }
+ }
+ // class-specific variables
+ this.isDragging = false;
+ this.mouseDown = false;
+ this.targetAnchor = null;
+ this.targetBox = null;
+ this.before = true;
+ // states
+ this.sourceState = "";
+ if(this.isSource){
+ dojo.addClass(this.node, "dojoDndSource");
+ }
+ this.targetState = "";
+ if(this.accept){
+ dojo.addClass(this.node, "dojoDndTarget");
+ }
+ if(this.horizontal){
+ dojo.addClass(this.node, "dojoDndHorizontal");
+ }
+ // set up events
+ this.topics = [
+ dojo.subscribe("/dnd/source/over", this, "onDndSourceOver"),
+ dojo.subscribe("/dnd/start", this, "onDndStart"),
+ dojo.subscribe("/dnd/drop", this, "onDndDrop"),
+ dojo.subscribe("/dnd/cancel", this, "onDndCancel")
+ ];
+ },
+
+ // methods
+ checkAcceptance: function(source, nodes){
+ // summary: checks, if the target can accept nodes from this source
+ // source: Object: the source which provides items
+ // nodes: Array: the list of transferred items
+ if(this == source){ return true; }
+ for(var i = 0; i < nodes.length; ++i){
+ var type = source.getItem(nodes[i].id).type;
+ // type instanceof Array
+ var flag = false;
+ for(var j = 0; j < type.length; ++j){
+ if(type[j] in this.accept){
+ flag = true;
+ break;
+ }
+ }
+ if(!flag){
+ return false; // Boolean
+ }
+ }
+ return true; // Boolean
+ },
+ copyState: function(keyPressed){
+ // summary: Returns true, if we need to copy items, false to move.
+ // It is separated to be overwritten dynamically, if needed.
+ // keyPressed: Boolean: the "copy" was pressed
+ return this.copyOnly || keyPressed; // Boolean
+ },
+ destroy: function(){
+ // summary: prepares the object to be garbage-collected
+ dojo.dnd.Source.superclass.destroy.call(this);
+ dojo.forEach(this.topics, dojo.unsubscribe);
+ this.targetAnchor = null;
+ },
+
+ // markup methods
+ markupFactory: function(params, node){
+ params._skipStartup = true;
+ return new dojo.dnd.Source(node, params);
+ },
+
+ // mouse event processors
+ onMouseMove: function(e){
+ // summary: event processor for onmousemove
+ // e: Event: mouse event
+ if(this.isDragging && this.targetState == "Disabled"){ return; }
+ dojo.dnd.Source.superclass.onMouseMove.call(this, e);
+ var m = dojo.dnd.manager();
+ if(this.isDragging){
+ // calculate before/after
+ var before = false;
+ if(this.current){
+ if(!this.targetBox || this.targetAnchor != this.current){
+ this.targetBox = {
+ xy: dojo.coords(this.current, true),
+ w: this.current.offsetWidth,
+ h: this.current.offsetHeight
+ };
+ }
+ if(this.horizontal){
+ before = (e.pageX - this.targetBox.xy.x) < (this.targetBox.w / 2);
+ }else{
+ before = (e.pageY - this.targetBox.xy.y) < (this.targetBox.h / 2);
+ }
+ }
+ if(this.current != this.targetAnchor || before != this.before){
+ this._markTargetAnchor(before);
+ m.canDrop(!this.current || m.source != this || !(this.current.id in this.selection));
+ }
+ }else{
+ if(this.mouseDown && this.isSource){
+ var nodes = this.getSelectedNodes();
+ if(nodes.length){
+ m.startDrag(this, nodes, this.copyState(dojo.dnd.getCopyKeyState(e)));
+ }
+ }
+ }
+ },
+ onMouseDown: function(e){
+ // summary: event processor for onmousedown
+ // e: Event: mouse event
+ if(this._legalMouseDown(e) && (!this.skipForm || !dojo.dnd.isFormElement(e))){
+ this.mouseDown = true;
+ this.mouseButton = e.button;
+ dojo.dnd.Source.superclass.onMouseDown.call(this, e);
+ }
+ },
+ onMouseUp: function(e){
+ // summary: event processor for onmouseup
+ // e: Event: mouse event
+ if(this.mouseDown){
+ this.mouseDown = false;
+ dojo.dnd.Source.superclass.onMouseUp.call(this, e);
+ }
+ },
+
+ // topic event processors
+ onDndSourceOver: function(source){
+ // summary: topic event processor for /dnd/source/over, called when detected a current source
+ // source: Object: the source which has the mouse over it
+ if(this != source){
+ this.mouseDown = false;
+ if(this.targetAnchor){
+ this._unmarkTargetAnchor();
+ }
+ }else if(this.isDragging){
+ var m = dojo.dnd.manager();
+ m.canDrop(this.targetState != "Disabled" && (!this.current || m.source != this || !(this.current.id in this.selection)));
+ }
+ },
+ onDndStart: function(source, nodes, copy){
+ // summary: topic event processor for /dnd/start, 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
+ if(this.isSource){
+ this._changeState("Source", this == source ? (copy ? "Copied" : "Moved") : "");
+ }
+ var accepted = this.accept && this.checkAcceptance(source, nodes);
+ this._changeState("Target", accepted ? "" : "Disabled");
+ if(accepted && this == source){
+ dojo.dnd.manager().overSource(this);
+ }
+ this.isDragging = true;
+ },
+ onDndDrop: function(source, nodes, copy){
+ // summary: topic event processor for /dnd/drop, called to finish 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
+ do{ //break box
+ if(this.containerState != "Over"){ break; }
+ var oldCreator = this._normalizedCreator;
+ if(this != source){
+ // transferring nodes from the source to the target
+ if(this.creator){
+ // use defined creator
+ this._normalizedCreator = function(node, hint){
+ return oldCreator.call(this, source.getItem(node.id).data, hint);
+ };
+ }else{
+ // we have no creator defined => move/clone nodes
+ if(copy){
+ // clone nodes
+ this._normalizedCreator = function(node, hint){
+ var t = source.getItem(node.id);
+ var n = node.cloneNode(true);
+ n.id = dojo.dnd.getUniqueId();
+ return {node: n, data: t.data, type: t.type};
+ };
+ }else{
+ // move nodes
+ this._normalizedCreator = function(node, hint){
+ var t = source.getItem(node.id);
+ source.delItem(node.id);
+ return {node: node, data: t.data, type: t.type};
+ };
+ }
+ }
+ }else{
+ // transferring nodes within the single source
+ if(this.current && this.current.id in this.selection){ break; }
+ if(this.creator){
+ // use defined creator
+ if(copy){
+ // create new copies of data items
+ this._normalizedCreator = function(node, hint){
+ return oldCreator.call(this, source.getItem(node.id).data, hint);
+ };
+ }else{
+ // move nodes
+ if(!this.current){ break; }
+ this._normalizedCreator = function(node, hint){
+ var t = source.getItem(node.id);
+ return {node: node, data: t.data, type: t.type};
+ };
+ }
+ }else{
+ // we have no creator defined => move/clone nodes
+ if(copy){
+ // clone nodes
+ this._normalizedCreator = function(node, hint){
+ var t = source.getItem(node.id);
+ var n = node.cloneNode(true);
+ n.id = dojo.dnd.getUniqueId();
+ return {node: n, data: t.data, type: t.type};
+ };
+ }else{
+ // move nodes
+ if(!this.current){ break; }
+ this._normalizedCreator = function(node, hint){
+ var t = source.getItem(node.id);
+ return {node: node, data: t.data, type: t.type};
+ };
+ }
+ }
+ }
+ this._removeSelection();
+ if(this != source){
+ this._removeAnchor();
+ }
+ if(this != source && !copy && !this.creator){
+ source.selectNone();
+ }
+ this.insertNodes(true, nodes, this.before, this.current);
+ if(this != source && !copy && this.creator){
+ source.deleteSelectedNodes();
+ }
+ this._normalizedCreator = oldCreator;
+ }while(false);
+ this.onDndCancel();
+ },
+ onDndCancel: function(){
+ // summary: topic event processor for /dnd/cancel, called to cancel the DnD operation
+ if(this.targetAnchor){
+ this._unmarkTargetAnchor();
+ this.targetAnchor = null;
+ }
+ this.before = true;
+ this.isDragging = false;
+ this.mouseDown = false;
+ delete this.mouseButton;
+ this._changeState("Source", "");
+ this._changeState("Target", "");
+ },
+
+ // utilities
+ onOverEvent: function(){
+ // summary: this function is called once, when mouse is over our container
+ dojo.dnd.Source.superclass.onOverEvent.call(this);
+ dojo.dnd.manager().overSource(this);
+ },
+ onOutEvent: function(){
+ // summary: this function is called once, when mouse is out of our container
+ dojo.dnd.Source.superclass.onOutEvent.call(this);
+ dojo.dnd.manager().outSource(this);
+ },
+ _markTargetAnchor: function(before){
+ // summary: assigns a class to the current target anchor based on "before" status
+ // before: Boolean: insert before, if true, after otherwise
+ if(this.current == this.targetAnchor && this.before == before){ return; }
+ if(this.targetAnchor){
+ this._removeItemClass(this.targetAnchor, this.before ? "Before" : "After");
+ }
+ this.targetAnchor = this.current;
+ this.targetBox = null;
+ this.before = before;
+ if(this.targetAnchor){
+ this._addItemClass(this.targetAnchor, this.before ? "Before" : "After");
+ }
+ },
+ _unmarkTargetAnchor: function(){
+ // summary: removes a class of the current target anchor based on "before" status
+ if(!this.targetAnchor){ return; }
+ this._removeItemClass(this.targetAnchor, this.before ? "Before" : "After");
+ this.targetAnchor = null;
+ this.targetBox = null;
+ this.before = true;
+ },
+ _markDndStatus: function(copy){
+ // summary: changes source's state based on "copy" status
+ this._changeState("Source", copy ? "Copied" : "Moved");
+ },
+ _legalMouseDown: function(e){
+ // summary: checks if user clicked on "approved" items
+ // e: Event: mouse event
+ if(!this.withHandles){ return true; }
+ for(var node = e.target; node && !dojo.hasClass(node, "dojoDndItem"); node = node.parentNode){
+ if(dojo.hasClass(node, "dojoDndHandle")){ return true; }
+ }
+ return false; // Boolean
+ }
+});
+
+dojo.declare("dojo.dnd.Target", dojo.dnd.Source, {
+ // summary: a Target object, which can be used as a DnD target
+
+ constructor: function(node, params){
+ // summary: a constructor of the Target --- see the Source constructor for details
+ this.isSource = false;
+ dojo.removeClass(this.node, "dojoDndSource");
+ },
+
+ // markup methods
+ markupFactory: function(params, node){
+ params._skipStartup = true;
+ return new dojo.dnd.Target(node, params);
+ }
+});
+
+}