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Alien-Web-ExtJS-V3
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  <pre class="prettyprint lang-js"><span id='Ext-dd-DropZone-method-constructor'><span id='Ext-dd-DropZone'>/**
</span></span> * @class Ext.dd.DropZone
 * @extends Ext.dd.DropTarget
 * &lt;p&gt;This class provides a container DD instance that allows dropping on multiple child target nodes.&lt;/p&gt;
 * &lt;p&gt;By default, this class requires that child nodes accepting drop are registered with {@link Ext.dd.Registry}.
 * However a simpler way to allow a DropZone to manage any number of target elements is to configure the
 * DropZone with an implementation of {@link #getTargetFromEvent} 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.&lt;/p&gt;
 * &lt;p&gt;Once the DropZone has detected through calling getTargetFromEvent, that the mouse is over
 * a drop target, that target is passed as the first parameter to {@link #onNodeEnter}, {@link #onNodeOver},
 * {@link #onNodeOut}, {@link #onNodeDrop}. You may configure the instance of DropZone with implementations
 * of these methods to provide application-specific behaviour for these events to update both
 * application state, and UI state.&lt;/p&gt;
 * &lt;p&gt;For example to make a GridPanel a cooperating target with the example illustrated in
 * {@link Ext.dd.DragZone DragZone}, the following technique might be used:&lt;/p&gt;&lt;pre&gt;&lt;code&gt;
myGridPanel.on('render', function() {
    myGridPanel.dropZone = new Ext.dd.DropZone(myGridPanel.getView().scroller, {

//      If the mouse is over a grid row, return that node. This is
//      provided as the &quot;target&quot; parameter in all &quot;onNodeXXXX&quot; node event handling functions
        getTargetFromEvent: function(e) {
            return e.getTarget(myGridPanel.getView().rowSelector);
        },

//      On entry into a target node, highlight that node.
        onNodeEnter : function(target, dd, e, data){ 
            Ext.fly(target).addClass('my-row-highlight-class');
        },

//      On exit from a target node, unhighlight that node.
        onNodeOut : function(target, dd, e, data){ 
            Ext.fly(target).removeClass('my-row-highlight-class');
        },

//      While over a target node, return the default drop allowed class which
//      places a &quot;tick&quot; icon into the drag proxy.
        onNodeOver : function(target, dd, e, data){ 
            return Ext.dd.DropZone.prototype.dropAllowed;
        },

//      On node drop we can interrogate the target to find the underlying
//      application object that is the real target of the dragged data.
//      In this case, it is a Record in the GridPanel's Store.
//      We can use the data set up by the DragZone's getDragData method to read
//      any data we decided to attach in the DragZone's getDragData method.
        onNodeDrop : function(target, dd, e, data){
            var rowIndex = myGridPanel.getView().findRowIndex(target);
            var r = myGridPanel.getStore().getAt(rowIndex);
            Ext.Msg.alert('Drop gesture', 'Dropped Record id ' + data.draggedRecord.id +
                ' on Record id ' + r.id);
            return true;
        }
    });
}
&lt;/code&gt;&lt;/pre&gt;
 * See the {@link Ext.dd.DragZone DragZone} documentation for details about building a DragZone which
 * cooperates with this DropZone.
 * @constructor
 * @param {Mixed} el The container element
 * @param {Object} config
 */
Ext.dd.DropZone = function(el, config){
    Ext.dd.DropZone.superclass.constructor.call(this, el, config);
};

Ext.extend(Ext.dd.DropZone, Ext.dd.DropTarget, {
<span id='Ext-dd-DropZone-method-getTargetFromEvent'>    /**
</span>     * Returns a custom data object associated with the DOM node that is the target of the event.  By default
     * this looks up the event target in the {@link Ext.dd.Registry}, although you can override this method to
     * provide your own custom lookup.
     * @param {Event} e The event
     * @return {Object} data The custom data
     */
    getTargetFromEvent : function(e){
        return Ext.dd.Registry.getTargetFromEvent(e);
    },

<span id='Ext-dd-DropZone-method-onNodeEnter'>    /**
</span>     * Called when the DropZone determines that a {@link Ext.dd.DragSource} has entered a drop node
     * that has either been registered or detected by a configured implementation of {@link #getTargetFromEvent}.
     * This method has no default implementation and should be overridden to provide
     * node-specific processing if necessary.
     * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from 
     * {@link #getTargetFromEvent} for this node)
     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
     * @param {Event} e The event
     * @param {Object} data An object containing arbitrary data supplied by the drag source
     */
    onNodeEnter : function(n, dd, e, data){
        
    },

<span id='Ext-dd-DropZone-method-onNodeOver'>    /**
</span>     * Called while the DropZone determines that a {@link Ext.dd.DragSource} is over a drop node
     * that has either been registered or detected by a configured implementation of {@link #getTargetFromEvent}.
     * The default implementation returns this.dropNotAllowed, so it should be
     * overridden to provide the proper feedback.
     * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from
     * {@link #getTargetFromEvent} for this node)
     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
     * @param {Event} e The event
     * @param {Object} data An object containing arbitrary data supplied by the drag source
     * @return {String} status The CSS class that communicates the drop status back to the source so that the
     * underlying {@link Ext.dd.StatusProxy} can be updated
     */
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