/*
+ * Based on:
+ * Ext JS Library 1.1.1
+ * Copyright(c) 2006-2007, Ext JS, LLC.
+ *
+ * Originally Released Under LGPL - original licence link has changed is not relivant.
+ *
+ * Fork - LGPL
+ * <script type="text/javascript">
+ */
+
+/**
+ * @class Roo.dd.DragSource
+ * @extends Roo.dd.DDProxy
+ * A simple class that provides the basic implementation needed to make any element draggable.
+ * @constructor
+ * @param {String/HTMLElement/Element} el The container element
+ * @param {Object} config
+ */
+Roo.dd.DragSource = function(el, config){
+ this.el = Roo.get(el);
+ this.dragData = {};
+
+ Roo.apply(this, config);
+
+ if(!this.proxy){
+ this.proxy = new Roo.dd.StatusProxy();
+ }
+
+ Roo.dd.DragSource.superclass.constructor.call(this, this.el.dom, this.ddGroup || this.group,
+ {dragElId : this.proxy.id, resizeFrame: false, isTarget: false, scroll: this.scroll === true});
+
+ this.dragging = false;
+};
+
+Roo.extend(Roo.dd.DragSource, Roo.dd.DDProxy, {
+ /**
+ * @cfg {String} dropAllowed
+ * The CSS class returned to the drag source when drop is allowed (defaults to "x-dd-drop-ok").
+ */
+ dropAllowed : "x-dd-drop-ok",
+ /**
+ * @cfg {String} dropNotAllowed
+ * The CSS class returned to the drag source when drop is not allowed (defaults to "x-dd-drop-nodrop").
+ */
+ dropNotAllowed : "x-dd-drop-nodrop",
+
+ /**
+ * Returns the data object associated with this drag source
+ * @return {Object} data An object containing arbitrary data
+ */
+ getDragData : function(e){
+ return this.dragData;
+ },
+
+ // private
+ onDragEnter : function(e, id){
+ var target = Roo.dd.DragDropMgr.getDDById(id);
+ this.cachedTarget = target;
+ if(this.beforeDragEnter(target, e, id) !== false){
+ if(target.isNotifyTarget){
+ var status = target.notifyEnter(this, e, this.dragData);
+ this.proxy.setStatus(status);
+ }else{
+ this.proxy.setStatus(this.dropAllowed);
+ }
+
+ if(this.afterDragEnter){
+ /**
+ * An empty function by default, but provided so that you can perform a custom action
+ * when the dragged item enters the drop target by providing an implementation.
+ * @param {Roo.dd.DragDrop} target The drop target
+ * @param {Event} e The event object
+ * @param {String} id The id of the dragged element
+ * @method afterDragEnter
+ */
+ this.afterDragEnter(target, e, id);
+ }
+ }
+ },
+
+ /**
+ * An empty function by default, but provided so that you can perform a custom action
+ * before the dragged item enters the drop target and optionally cancel the onDragEnter.
+ * @param {Roo.dd.DragDrop} target The drop target
+ * @param {Event} e The event object
+ * @param {String} id The id of the dragged element
+ * @return {Boolean} isValid True if the drag event is valid, else false to cancel
+ */
+ beforeDragEnter : function(target, e, id){
+ return true;
+ },
+
+ // private
+ alignElWithMouse: function() {
+ Roo.dd.DragSource.superclass.alignElWithMouse.apply(this, arguments);
+ this.proxy.sync();
+ },
+
+ // private
+ onDragOver : function(e, id){
+ var target = this.cachedTarget || Roo.dd.DragDropMgr.getDDById(id);
+ if(this.beforeDragOver(target, e, id) !== false){
+ if(target.isNotifyTarget){
+ var status = target.notifyOver(this, e, this.dragData);
+ this.proxy.setStatus(status);
+ }
+
+ if(this.afterDragOver){
+ /**
+ * An empty function by default, but provided so that you can perform a custom action
+ * while the dragged item is over the drop target by providing an implementation.
+ * @param {Roo.dd.DragDrop} target The drop target
+ * @param {Event} e The event object
+ * @param {String} id The id of the dragged element
+ * @method afterDragOver
+ */
+ this.afterDragOver(target, e, id);
+ }
+ }
+ },
+
+ /**
+ * An empty function by default, but provided so that you can perform a custom action
+ * while the dragged item is over the drop target and optionally cancel the onDragOver.
+ * @param {Roo.dd.DragDrop} target The drop target
+ * @param {Event} e The event object
+ * @param {String} id The id of the dragged element
+ * @return {Boolean} isValid True if the drag event is valid, else false to cancel
+ */
+ beforeDragOver : function(target, e, id){
+ return true;
+ },
+
+ // private
+ onDragOut : function(e, id){
+ var target = this.cachedTarget || Roo.dd.DragDropMgr.getDDById(id);
+ if(this.beforeDragOut(target, e, id) !== false){
+ if(target.isNotifyTarget){
+ target.notifyOut(this, e, this.dragData);
+ }
+ this.proxy.reset();
+ if(this.afterDragOut){
+ /**
+ * An empty function by default, but provided so that you can perform a custom action
+ * after the dragged item is dragged out of the target without dropping.
+ * @param {Roo.dd.DragDrop} target The drop target
+ * @param {Event} e The event object
+ * @param {String} id The id of the dragged element
+ * @method afterDragOut
+ */
+ this.afterDragOut(target, e, id);
+ }
+ }
+ this.cachedTarget = null;
+ },
+
+ /**
+ * An empty function by default, but provided so that you can perform a custom action before the dragged
+ * item is dragged out of the target without dropping, and optionally cancel the onDragOut.
+ * @param {Roo.dd.DragDrop} target The drop target
+ * @param {Event} e The event object
+ * @param {String} id The id of the dragged element
+ * @return {Boolean} isValid True if the drag event is valid, else false to cancel
+ */
+ beforeDragOut : function(target, e, id){
+ return true;
+ },
+
+ // private
+ onDragDrop : function(e, id){
+ var target = this.cachedTarget || Roo.dd.DragDropMgr.getDDById(id);
+ if(this.beforeDragDrop(target, e, id) !== false){
+ if(target.isNotifyTarget){
+ if(target.notifyDrop(this, e, this.dragData)){ // valid drop?
+ this.onValidDrop(target, e, id);
+ }else{
+ this.onInvalidDrop(target, e, id);
+ }
+ }else{
+ this.onValidDrop(target, e, id);
+ }
+
+ if(this.afterDragDrop){
+ /**
+ * An empty function by default, but provided so that you can perform a custom action
+ * after a valid drag drop has occurred by providing an implementation.
+ * @param {Roo.dd.DragDrop} target The drop target
+ * @param {Event} e The event object
+ * @param {String} id The id of the dropped element
+ * @method afterDragDrop
+ */
+ this.afterDragDrop(target, e, id);
+ }
+ }
+ delete this.cachedTarget;
+ },
+
+ /**
+ * An empty function by default, but provided so that you can perform a custom action before the dragged
+ * item is dropped onto the target and optionally cancel the onDragDrop.
+ * @param {Roo.dd.DragDrop} target The drop target
+ * @param {Event} e The event object
+ * @param {String} id The id of the dragged element
+ * @return {Boolean} isValid True if the drag drop event is valid, else false to cancel
+ */
+ beforeDragDrop : function(target, e, id){
+ return true;
+ },
+
+ // private
+ onValidDrop : function(target, e, id){
+ this.hideProxy();
+ if(this.afterValidDrop){
+ /**
+ * An empty function by default, but provided so that you can perform a custom action
+ * after a valid drop has occurred by providing an implementation.
+ * @param {Object} target The target DD
+ * @param {Event} e The event object
+ * @param {String} id The id of the dropped element
+ * @method afterInvalidDrop
+ */
+ this.afterValidDrop(target, e, id);
+ }
+ },
+
+ // private
+ getRepairXY : function(e, data){
+ return this.el.getXY();
+ },
+
+ // private
+ onInvalidDrop : function(target, e, id){
+ this.beforeInvalidDrop(target, e, id);
+ if(this.cachedTarget){
+ if(this.cachedTarget.isNotifyTarget){
+ this.cachedTarget.notifyOut(this, e, this.dragData);
+ }
+ this.cacheTarget = null;
+ }
+ this.proxy.repair(this.getRepairXY(e, this.dragData), this.afterRepair, this);
+
+ if(this.afterInvalidDrop){
+ /**
+ * An empty function by default, but provided so that you can perform a custom action
+ * after an invalid drop has occurred by providing an implementation.
+ * @param {Event} e The event object
+ * @param {String} id The id of the dropped element
+ * @method afterInvalidDrop
+ */
+ this.afterInvalidDrop(e, id);
+ }
+ },
+
+ // private
+ afterRepair : function(){
+ if(Roo.enableFx){
+ this.el.highlight(this.hlColor || "c3daf9");
+ }
+ this.dragging = false;
+ },
+
+ /**
+ * An empty function by default, but provided so that you can perform a custom action after an invalid
+ * drop has occurred.
+ * @param {Roo.dd.DragDrop} target The drop target
+ * @param {Event} e The event object
+ * @param {String} id The id of the dragged element
+ * @return {Boolean} isValid True if the invalid drop should proceed, else false to cancel
+ */
+ beforeInvalidDrop : function(target, e, id){
+ return true;
+ },
+
+ // private
+ handleMouseDown : function(e){
+ if(this.dragging) {
+ return;
+ }
+ var data = this.getDragData(e);
+ if(data && this.onBeforeDrag(data, e) !== false){
+ this.dragData = data;
+ this.proxy.stop();
+ Roo.dd.DragSource.superclass.handleMouseDown.apply(this, arguments);
+ }
+ },
+
+ /**
+ * An empty function by default, but provided so that you can perform a custom action before the initial
+ * drag event begins and optionally cancel it.
+ * @param {Object} data An object containing arbitrary data to be shared with drop targets
+ * @param {Event} e The event object
+ * @return {Boolean} isValid True if the drag event is valid, else false to cancel
+ */
+ onBeforeDrag : function(data, e){
+ return true;
+ },
+
+ /**
+ * An empty function by default, but provided so that you can perform a custom action once the initial
+ * drag event has begun. The drag cannot be canceled from this function.
+ * @param {Number} x The x position of the click on the dragged object
+ * @param {Number} y The y position of the click on the dragged object
+ */
+ onStartDrag : Roo.emptyFn,
+
+ // private - YUI override
+ startDrag : function(x, y){
+ this.proxy.reset();
+ this.dragging = true;
+ this.proxy.update("");
+ this.onInitDrag(x, y);
+ this.proxy.show();
+ },
+
+ // private
+ onInitDrag : function(x, y){
+ var clone = this.el.dom.cloneNode(true);
+ clone.id = Roo.id(); // prevent duplicate ids
+ this.proxy.update(clone);
+ this.onStartDrag(x, y);
+ return true;
+ },
+
+ /**
+ * Returns the drag source's underlying {@link Roo.dd.StatusProxy}
+ * @return {Roo.dd.StatusProxy} proxy The StatusProxy
+ */
+ getProxy : function(){
+ return this.proxy;
+ },
+
+ /**
+ * Hides the drag source's {@link Roo.dd.StatusProxy}
+ */
+ hideProxy : function(){
+ this.proxy.hide();
+ this.proxy.reset(true);
+ this.dragging = false;
+ },
+
+ // private
+ triggerCacheRefresh : function(){
+ Roo.dd.DDM.refreshCache(this.groups);
+ },
+
+ // private - override to prevent hiding
+ b4EndDrag: function(e) {
+ },
+
+ // private - override to prevent moving
+ endDrag : function(e){
+ this.onEndDrag(this.dragData, e);
+ },
+
+ // private
+ onEndDrag : function(data, e){
+ },
+
+ // private - pin to cursor
+ autoOffset : function(x, y) {
+ this.setDelta(-12, -20);
+ }
+});
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