[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'Controls' (#lcl)

TWinControl.DockOver

Called to check whether this control allows docking and where.

Declaration

Source position: controls.pp line 2248

protected procedure TWinControl.DockOver(

  Source: TDragDockObject;

  X: Integer;

  Y: Integer;

  State: TDragState;

  var Accept: Boolean

); virtual;

Arguments

Accept

  

Initially True, set to False to reject an drop.

Description

Called for messages from the DragManager including: dmEnter, dmLeave, and dmMove. Gets the DockRect to show.

Positions the DockRect, and invokes OnDockOver (via DoDockOver).

Everything can be overridden using the OnDockOver handler, when assigned.

See also

TControl.PositionDockRect

  

Get the DockRect for an possible drop.

TWinControl.OnDockOver

  

Event handler signalled when a control is moved over a docksite; determines whether the drop event is accepted or rejected.

Version 3.2 Generated 2024-02-25 Home