    /*
     * This is a derivative of the similarly named class in the YUI Library.
     * The original license:
     * Copyright (c) 2006, Yahoo! Inc. All rights reserved.
     * Code licensed under the BSD License:
     * http://developer.yahoo.net/yui/license.txt
     */

    /**
     * A DragDrop implementation that does not move, but can be a drop
     * target.  You would get the same result by simply omitting implementation
     * for the event callbacks, but this way we reduce the processing cost of the
     * event listener and the callbacks.
     */
    Ext.define('Ext.dd.DDTarget', {
        extend: 'Ext.dd.DragDrop',

        /**
         * Creates new DDTarget.
         * @param {String} id the id of the element that is a drop target
         * @param {String} sGroup the group of related DragDrop objects
         * @param {Object} config an object containing configurable attributes.
         * Valid properties for DDTarget in addition to those in DragDrop: none.
         */
        constructor: function(id, sGroup, config) {
            if (id) {
                this.initTarget(id, sGroup, config);
            }
        },

        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        getDragEl: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        isValidHandleChild: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        startDrag: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        endDrag: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        onDrag: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        onDragDrop: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        onDragEnter: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        onDragOut: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        onDragOver: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        onInvalidDrop: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        onMouseDown: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        onMouseUp: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        setXConstraint: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        setYConstraint: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        resetConstraints: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        clearConstraints: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        clearTicks: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        setInitPosition: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        setDragElId: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        setHandleElId: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        setOuterHandleElId: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        addInvalidHandleClass: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        addInvalidHandleId: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        addInvalidHandleType: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        removeInvalidHandleClass: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        removeInvalidHandleId: Ext.emptyFn,
        /**
         * Overridden and disabled. A DDTarget does not support being dragged.
         * @method
         */
        removeInvalidHandleType: Ext.emptyFn,

        toString: function() {
            return ("DDTarget " + this.id);
        }
    });