TTMSFNCDataGridCanDragHeaderGroupEvent Event Type

Fired while the pointer moves with a chip pressed, before a chip drag starts.

API unit family: TMSFNCDataGrid

Remarks

Only fires when Header.VisualGrouping.Dragging is True. The drag starts once the pointer has moved beyond Options.Mouse.ClickMargin and the handler allowed it.

Parameters

Name	Description
Sender	Grid that fired the event.
AColumn	Zero-based index of the column of the pressed chip.
ACanDrag	True by default. Set to False to prevent the chip from being dragged.