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+/*!
+ * Ext JS Library 3.4.0
+ * Copyright(c) 2006-2011 Sencha Inc.
+ * licensing@sencha.com
+ * http://www.sencha.com/license
+ */
+/**
+ * @class Ext.dd.DragZone
+ * @extends Ext.dd.DragSource
+ * <p>This class provides a container DD instance that allows dragging of multiple child source nodes.</p>
+ * <p>This class does not move the drag target nodes, but a proxy element which may contain
+ * any DOM structure you wish. The DOM element to show in the proxy is provided by either a
+ * provided implementation of {@link #getDragData}, or by registered draggables registered with {@link Ext.dd.Registry}</p>
+ * <p>If you wish to provide draggability for an arbitrary number of DOM nodes, each of which represent some
+ * application object (For example nodes in a {@link Ext.DataView DataView}) then use of this class
+ * is the most efficient way to "activate" those nodes.</p>
+ * <p>By default, this class requires that draggable child nodes are registered with {@link Ext.dd.Registry}.
+ * However a simpler way to allow a DragZone to manage any number of draggable elements is to configure
+ * the DragZone with an implementation of the {@link #getDragData} method which interrogates the passed
+ * mouse event to see if it has taken place within an element, or class of elements. This is easily done
+ * by using the event's {@link Ext.EventObject#getTarget getTarget} method to identify a node based on a
+ * {@link Ext.DomQuery} selector. For example, to make the nodes of a DataView draggable, use the following
+ * technique. Knowledge of the use of the DataView is required:</p><pre><code>
+myDataView.on('render', function(v) {
+ myDataView.dragZone = new Ext.dd.DragZone(v.getEl(), {
+
+// On receipt of a mousedown event, see if it is within a DataView node.
+// Return a drag data object if so.
+ getDragData: function(e) {
+
+// Use the DataView's own itemSelector (a mandatory property) to
+// test if the mousedown is within one of the DataView's nodes.
+ var sourceEl = e.getTarget(v.itemSelector, 10);
+
+// If the mousedown is within a DataView node, clone the node to produce
+// a ddel element for use by the drag proxy. Also add application data
+// to the returned data object.
+ if (sourceEl) {
+ d = sourceEl.cloneNode(true);
+ d.id = Ext.id();
+ return {
+ ddel: d,
+ sourceEl: sourceEl,
+ repairXY: Ext.fly(sourceEl).getXY(),
+ sourceStore: v.store,
+ draggedRecord: v.{@link Ext.DataView#getRecord getRecord}(sourceEl)
+ }
+ }
+ },
+
+// Provide coordinates for the proxy to slide back to on failed drag.
+// This is the original XY coordinates of the draggable element captured
+// in the getDragData method.
+ getRepairXY: function() {
+ return this.dragData.repairXY;
+ }
+ });
+});</code></pre>
+ * See the {@link Ext.dd.DropZone DropZone} documentation for details about building a DropZone which
+ * cooperates with this DragZone.
+ * @constructor
+ * @param {Mixed} el The container element
+ * @param {Object} config
+ */
+Ext.dd.DragZone = Ext.extend(Ext.dd.DragSource, {
+
+ constructor : function(el, config){
+ Ext.dd.DragZone.superclass.constructor.call(this, el, config);
+ if(this.containerScroll){
+ Ext.dd.ScrollManager.register(this.el);
+ }
+ },
+
+ /**
+ * This property contains the data representing the dragged object. This data is set up by the implementation
+ * of the {@link #getDragData} method. It must contain a <tt>ddel</tt> property, but can contain
+ * any other data according to the application's needs.
+ * @type Object
+ * @property dragData
+ */
+ /**
+ * @cfg {Boolean} containerScroll True to register this container with the Scrollmanager
+ * for auto scrolling during drag operations.
+ */
+ /**
+ * @cfg {String} hlColor The color to use when visually highlighting the drag source in the afterRepair
+ * method after a failed drop (defaults to "c3daf9" - light blue)
+ */
+
+ /**
+ * Called when a mousedown occurs in this container. Looks in {@link Ext.dd.Registry}
+ * for a valid target to drag based on the mouse down. Override this method
+ * to provide your own lookup logic (e.g. finding a child by class name). Make sure your returned
+ * object has a "ddel" attribute (with an HTML Element) for other functions to work.
+ * @param {EventObject} e The mouse down event
+ * @return {Object} The dragData
+ */
+ getDragData : function(e){
+ return Ext.dd.Registry.getHandleFromEvent(e);
+ },
+
+ /**
+ * Called once drag threshold has been reached to initialize the proxy element. By default, it clones the
+ * this.dragData.ddel
+ * @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
+ * @return {Boolean} true to continue the drag, false to cancel
+ */
+ onInitDrag : function(x, y){
+ this.proxy.update(this.dragData.ddel.cloneNode(true));
+ this.onStartDrag(x, y);
+ return true;
+ },
+
+ /**
+ * Called after a repair of an invalid drop. By default, highlights this.dragData.ddel
+ */
+ afterRepair : function(){
+ if(Ext.enableFx){
+ Ext.Element.fly(this.dragData.ddel).highlight(this.hlColor || "c3daf9");
+ }
+ this.dragging = false;
+ },
+
+ /**
+ * Called before a repair of an invalid drop to get the XY to animate to. By default returns
+ * the XY of this.dragData.ddel
+ * @param {EventObject} e The mouse up event
+ * @return {Array} The xy location (e.g. [100, 200])
+ */
+ getRepairXY : function(e){
+ return Ext.Element.fly(this.dragData.ddel).getXY();
+ },
+
+ destroy : function(){
+ Ext.dd.DragZone.superclass.destroy.call(this);
+ if(this.containerScroll){
+ Ext.dd.ScrollManager.unregister(this.el);
+ }
+ }
+});
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