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View this topic on docs.devexpress.com (Learn more)

DragRowEventArgs.Effect Property

Gets or sets an effect available for the processed drag and drop operation.

Namespace:DevExpress.XtraVerticalGrid.Events
Assembly:DevExpress.XtraVerticalGrid.v19.2.dll

Expanded Syntax

Property value

Type: RowDragEffect
A RowDragEffect enumeration value representing the pointer feedback indicating what happens if the mouse is released at any given moment.

Expanded Remarks

The Effect property is useful for providing visual feedback during a drag operation. By setting this property you can specify the icon displayed as the pointer during a drag and drop operation and enable the corresponding action for the dragged row. In this way, pointer feedback provided by this property indicates what will happen if the mouse is released at any given moment during row dragging.

In a handler for the VGridControlBase.ProcessDragRow event you can use this property to change the pointer feedback continually as the user moves the dragged row. For example, if the pointer is moved over an object that cannot accept a drop, the pointer can be changed to the "not allowed" symbol specified by the RowDragEffect.None value.

Expanded Example

This example demonstrates how you can handle native drag specific grid events in order to combine a dragged row with the targeted one in a single multi-editor row. The example implies that an editor row dragged from the Customization Form can only be dropped onto the headers of editor or multi-editor rows. In a case when the target is a multi-editor row, a dropped row is inserted as a new row item for the target row. When dropping a row onto the header cell of the targeted editor row, both rows (dropped and target) are deleted from the grid and a multi-editor row with two row items is created instead. The created row items copy base row settings from the deleted rows. The position of the drop point inside the header cell of the target row (row item) affects the index of the new row item created for the dropped row.

Note that the example uses information from the BaseViewInfo object available via the VGridControlBase.ViewInfo property in order to properly calculate the targeted header cell's bounds. The following picture illustrates the base view info notions used in the example.

The image below displays the process of handling row drag & drop operations using the code in this example.

If you want to split a multi-editor row into several editor rows you can use the code provided by the Dragging Rows topic.

Expanded See Also

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