TdxCustomTileControl.OnGroupDragBegin Event
Enables you to forbid end-users to drag-and-drop specific tile groups within the control.
Declaration
property OnGroupDragBegin: TdxTileControlGroupDragBeginEvent read; write;
Remarks
This event occurs every time an end-user starts dragging a tile group. You can assign False to the AAllow parameter within the OnGroupDragBegin event handler to prevent an end-user from dragging all or only specific groups within the control. For instance, you can allow end-users to drag only the top or leftmost group, depending on the OptionsView.GroupLayout property value:
procedure TMyForm.dxTileControl1GroupDragBegin(Sender: TdxCustomTileControl; AInfo: TdxTileControlDragGroupInfo; var AAllow: Boolean);
begin
if AInfo.BeginIndex <> 0 then // If the dragged group is not the first...
AAllow := False; // Forbids an end-user to drop a group here
end;
Refer to the TdxTileControlGroupDragBeginEvent procedural type description for detailed information on all parameters accessible within an OnGroupDragBegin event handler.
See Also