/**
+ * @class Ext.grid.plugin.DragDrop
+ * <p>This plugin provides drag and/or drop functionality for a GridView.</p>
+ * <p>It creates a specialized instance of {@link Ext.dd.DragZone DragZone} which knows how to drag out of a {@link Ext.grid.View GridView}
+ * and loads the data object which is passed to a cooperating {@link Ext.dd.DragZone DragZone}'s methods with the following properties:<ul>
+ * <li>copy : Boolean
+ * <div class="sub-desc">The value of the GridView's <code>copy</code> property, or <code>true</code> if the GridView was configured
+ * with <code>allowCopy: true</code> <u>and</u> the control key was pressed when the drag operation was begun.</div></li>
+ * <li>view : GridView
+ * <div class="sub-desc">The source GridView from which the drag originated.</div></li>
+ * <li>ddel : HtmlElement
+ * <div class="sub-desc">The drag proxy element which moves with the mouse</div></li>
+ * <li>item : HtmlElement
+ * <div class="sub-desc">The GridView node upon which the mousedown event was registered.</div></li>
+ * <li>records : Array
+ * <div class="sub-desc">An Array of {@link Ext.data.Model Model}s representing the selected data being dragged from the source GridView.</div></li>
+ * </ul></p>
+ * <p>It also creates a specialized instance of {@link Ext.dd.DropZone} which cooperates with other DropZones which are members of the same
+ * ddGroup which processes such data objects.</p>
+ * <p>Adding this plugin to a view means that two new events may be fired from the client GridView, <code>{@link #event-beforedrop beforedrop}</code> and
+ * <code>{@link #event-drop drop}</code></p>
+ */
+Ext.define('Ext.grid.plugin.DragDrop', {
+ extend: 'Ext.AbstractPlugin',
+ alias: 'plugin.gridviewdragdrop',
+
+ uses: [
+ 'Ext.view.DragZone',
+ 'Ext.grid.ViewDropZone'
+ ],
+
+ /**
+ * @event beforedrop
+ * <p><b>This event is fired through the GridView. Add listeners to the GridView object</b></p>
+ * <p>Fired when a drop gesture has been triggered by a mouseup event in a valid drop position in the GridView.
+ * @param {HtmlElement} node The GridView node <b>if any</b> over which the mouse was positioned.</p>
+ * <p>Returning <code>false</code> to this event signals that the drop gesture was invalid, and if the drag proxy
+ * will animate back to the point from which the drag began.</p>
+ * <p>Returning <code>0</code> To this event signals that the data transfer operation should not take place, but
+ * that the gesture was valid, and that the repair operation should not take place.</p>
+ * <p>Any other return value continues with the data transfer operation.</p>
+ * @param {Object} data The data object gathered at mousedown time by the cooperating {@link Ext.dd.DragZone DragZone}'s
+ * {@link Ext.dd.DragZone#getDragData getDragData} method it contains the following properties:<ul>
+ * <li>copy : Boolean
+ * <div class="sub-desc">The value of the GridView's <code>copy</code> property, or <code>true</code> if the GridView was configured
+ * with <code>allowCopy: true</code> and the control key was pressed when the drag operation was begun</div></li>
+ * <li>view : GridView
+ * <div class="sub-desc">The source GridView from which the drag originated.</div></li>
+ * <li>ddel : HtmlElement
+ * <div class="sub-desc">The drag proxy element which moves with the mouse</div></li>
+ * <li>item : HtmlElement
+ * <div class="sub-desc">The GridView node upon which the mousedown event was registered.</div></li>
+ * <li>records : Array
+ * <div class="sub-desc">An Array of {@link Ext.data.Model Model}s representing the selected data being dragged from the source GridView.</div></li>
+ * </ul>
+ * @param {Ext.data.Model} overModel The Model over which the drop gesture took place.
+ * @param {String} dropPosition <code>"before"</code> or <code>"after"</code> depending on whether the mouse is above or below the midline of the node.
+ * @param {Function} dropFunction <p>A function to call to complete the data transfer operation and either move or copy Model instances from the source
+ * View's Store to the destination View's Store.</p>
+ * <p>This is useful when you want to perform some kind of asynchronous processing before confirming
+ * the drop, such as an {@link Ext.window.MessageBox#confirm confirm} call, or an Ajax request.</p>
+ * <p>Return <code>0</code> from this event handler, and call the <code>dropFunction</code> at any time to perform the data transfer.</p>
+ */
+
+ /**
+ * @event drop
+ * <b>This event is fired through the GridView. Add listeners to the GridView object</b>
+ * Fired when a drop operation has been completed and the data has been moved or copied.
+ * @param {HtmlElement} node The GridView node <b>if any</b> over which the mouse was positioned.
+ * @param {Object} data The data object gathered at mousedown time by the cooperating {@link Ext.dd.DragZone DragZone}'s
+ * {@link Ext.dd.DragZone#getDragData getDragData} method it contains the following properties:<ul>
+ * <li>copy : Boolean
+ * <div class="sub-desc">The value of the GridView's <code>copy</code> property, or <code>true</code> if the GridView was configured
+ * with <code>allowCopy: true</code> and the control key was pressed when the drag operation was begun</div></li>
+ * <li>view : GridView
+ * <div class="sub-desc">The source GridView from which the drag originated.</div></li>
+ * <li>ddel : HtmlElement
+ * <div class="sub-desc">The drag proxy element which moves with the mouse</div></li>
+ * <li>item : HtmlElement
+ * <div class="sub-desc">The GridView node upon which the mousedown event was registered.</div></li>
+ * <li>records : Array
+ * <div class="sub-desc">An Array of {@link Ext.data.Model Model}s representing the selected data being dragged from the source GridView.</div></li>
+ * </ul>
+ * @param {Ext.data.Model} overModel The Model over which the drop gesture took place.
+ * @param {String} dropPosition <code>"before"</code> or <code>"after"</code> depending on whether the mouse is above or below the midline of the node.
+ */
+
+ dragText : '{0} selected row{1}',
+
+ /**
+ * @cfg {String} ddGroup
+ * A named drag drop group to which this object belongs. If a group is specified, then both the DragZones and DropZone
+ * used by this plugin will only interact with other drag drop objects in the same group (defaults to 'TreeDD').
+ */
+ ddGroup : "GridDD",
+
+ /**
+ * @cfg {String} dragGroup
+ * <p>The ddGroup to which the DragZone will belong.</p>
+ * <p>This defines which other DropZones the DragZone will interact with. Drag/DropZones only interact with other Drag/DropZones
+ * which are members of the same ddGroup.</p>
+ */
+
+ /**
+ * @cfg {String} dropGroup
+ * <p>The ddGroup to which the DropZone will belong.</p>
+ * <p>This defines which other DragZones the DropZone will interact with. Drag/DropZones only interact with other Drag/DropZones
+ * which are members of the same ddGroup.</p>
+ */
+
+ /**
+ * @cfg {Boolean} enableDrop
+ * <p>Defaults to <code>true</code></p>
+ * <p>Set to <code>false</code> to disallow the View from accepting drop gestures</p>
+ */
+ enableDrop: true,
+
+ /**
+ * @cfg {Boolean} enableDrag
+ * <p>Defaults to <code>true</code></p>
+ * <p>Set to <code>false</code> to disallow dragging items from the View </p>
+ */
+ enableDrag: true,
+
+ init : function(view) {
+ view.on('render', this.onViewRender, this, {single: true});
+ },
+
+ /**
+ * @private
+ * AbstractComponent calls destroy on all its plugins at destroy time.
+ */
+ destroy: function() {
+ Ext.destroy(this.dragZone, this.dropZone);
+ },
+
+ onViewRender : function(view) {
+ var me = this;
+
+ if (me.enableDrag) {
+ me.dragZone = Ext.create('Ext.view.DragZone', {
+ view: view,
+ ddGroup: me.dragGroup || me.ddGroup,
+ dragText: me.dragText
+ });
+ }
+
+ if (me.enableDrop) {
+ me.dropZone = Ext.create('Ext.grid.ViewDropZone', {
+ view: view,
+ ddGroup: me.dropGroup || me.ddGroup
+ });
+ }
+ }
+});