TCustomButtonPanel.Notification procedure
Called by components that are freed and which received a FreeNotification.
Declaration
procedure Notification(AComponent: TComponent; Operation: TOperation)
; overrideArguments
AComponent | Component for the notification. |
Operation | Operation performed for the component. |
Description
Notification is called whenever a child component is destroyed,
inserted or removed from the list of owned components. Components that were
requested to send a notification when they are freed (with FreeNotification)
will also call Notification when they are freed.
The AComponent parameter specifies which component sends the
notification, and Operation specifies whether the component is
being inserted into or removed from the child component list, or whether it
is being destroyed.
Notification is overridden in TCustomButtonPanel to ensure that
TPanelBitBtn instances which are freed are excluded from the
ShowButtons property, and their internal storage is Nil'd.
If the panel control is not being destroyed, the remaining buttons are
re-sized and re-aligned.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.