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<title>The source code</title>
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<pre class="prettyprint lang-js">/*!
* Ext JS Library 3.0.3
* Copyright(c) 2006-2009 Ext JS, LLC
* licensing@extjs.com
* http://www.extjs.com/license
*/
<div id="cls-Ext.dd.DropTarget"></div>/**
* @class Ext.dd.DropTarget
* @extends Ext.dd.DDTarget
* A simple class that provides the basic implementation needed to make any element a drop target that can have
* draggable items dropped onto it. The drop has no effect until an implementation of notifyDrop is provided.
* @constructor
* @param {Mixed} el The container element
* @param {Object} config
*/
Ext.dd.DropTarget = function(el, config){
this.el = Ext.get(el);
Ext.apply(this, config);
if(this.containerScroll){
Ext.dd.ScrollManager.register(this.el);
}
Ext.dd.DropTarget.superclass.constructor.call(this, this.el.dom, this.ddGroup || this.group,
{isTarget: true});
};
Ext.extend(Ext.dd.DropTarget, Ext.dd.DDTarget, {
<div id="cfg-Ext.dd.DropTarget-ddGroup"></div>/**
* @cfg {String} ddGroup
* A named drag drop group to which this object belongs. If a group is specified, then this object will only
* interact with other drag drop objects in the same group (defaults to undefined).
*/
<div id="cfg-Ext.dd.DropTarget-overClass"></div>/**
* @cfg {String} overClass
* The CSS class applied to the drop target element while the drag source is over it (defaults to "").
*/
<div id="cfg-Ext.dd.DropTarget-dropAllowed"></div>/**
* @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",
<div id="cfg-Ext.dd.DropTarget-dropNotAllowed"></div>/**
* @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",
// private
isTarget : true,
// private
isNotifyTarget : true,
<div id="method-Ext.dd.DropTarget-notifyEnter"></div>/**
* The function a {@link Ext.dd.DragSource} calls once to notify this drop target that the source is now over the
* target. This default implementation adds the CSS class specified by overClass (if any) to the drop element
* and returns the dropAllowed config value. This method should be overridden if drop validation is required.
* @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
* @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
*/
notifyEnter : function(dd, e, data){
if(this.overClass){
this.el.addClass(this.overClass);
}
return this.dropAllowed;
},
<div id="method-Ext.dd.DropTarget-notifyOver"></div>/**
* The function a {@link Ext.dd.DragSource} calls continuously while it is being dragged over the target.
* This method will be called on every mouse movement while the drag source is over the drop target.
* This default implementation simply returns the dropAllowed config value.
* @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
* @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
*/
notifyOver : function(dd, e, data){
return this.dropAllowed;
},
<div id="method-Ext.dd.DropTarget-notifyOut"></div>/**
* The function a {@link Ext.dd.DragSource} calls once to notify this drop target that the source has been dragged
* out of the target without dropping. This default implementation simply removes the CSS class specified by
* overClass (if any) from the drop element.
* @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
* @param {Event} e The event
* @param {Object} data An object containing arbitrary data supplied by the drag source
*/
notifyOut : function(dd, e, data){
if(this.overClass){
this.el.removeClass(this.overClass);
}
},
<div id="method-Ext.dd.DropTarget-notifyDrop"></div>/**
* The function a {@link Ext.dd.DragSource} calls once to notify this drop target that the dragged item has
* been dropped on it. This method has no default implementation and returns false, so you must provide an
* implementation that does something to process the drop event and returns true so that the drag source's
* repair action does not run.
* @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
* @param {Event} e The event
* @param {Object} data An object containing arbitrary data supplied by the drag source
* @return {Boolean} True if the drop was valid, else false
*/
notifyDrop : function(dd, e, data){
return false;
}
});</pre>
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