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

DragDropManager.QueryDragPreviewImage Event

Allows you to provide a preview of the dragged data elements.

Namespace:DevExpress.Utils.DragDrop
Assembly:DevExpress.Utils.v19.2.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type QueryDragPreviewImageEventArgs containing data related to this event.

The following QueryDragPreviewImageEventArgs properties provide information specific to this event.
Property Description
Action Gets the drag-and-drop action (Copy, Move, etc.) to perform.
InsertType Gets or sets whether dragged data elements will be inserted before or after data element under the mouse pointer, or as a child (for tree list only).
KeyState Gets the pressed mouse buttons (left, middle, right) and modifier keys (Shift, Ctrl, Alt).
PreviewImage Gets or sets a preview of dragged data elements (rows/nodes/items).
Source Gets the source control.
Target Gets the target control.

Expanded Remarks

During a drag-and-drop operation, the Behavior Manager (see DragDropManager) shows a preview of dragged data elements near the mouse pointer. You can use the PreviewShowMode property to disable the preview image or enable it for target controls only.

If this setting is enabled, you can disable a particular control's preview with the DragDropBehaviorProperties.PreviewVisible property.

To customize the preview image, use the following options:

Expanded See Also

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