TControl.ParentToClient function

Member of TControlpublicIn unit Controls

Converts the specified client coordinates on a parent control to the client coordinates for the control instance.

Declaration

pascal

function ParentToClient(const Point: TPoint; AParent: TWinControl=Nil)
: TPoint

Description

Point contains the client coordinates relative the parent control AParent. If AParent is not assigned ( Nil), the value in the Parent property is used as the value for the argument.

ParentToClient calls the IsParentOf method in AParent to determine if the current control is hosted on AParent. An EInvalidOperation exception is raised if the IsParentOf method returns False.

The return value is a TPoint instance with client coordinates for the control relative to the client coordinates on AParent.

An experiment, built from Lazarus main 2dfa93c66e of 10-22-2026. Not the official Lazarus documentation.