OnChange

Graphics32

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TNotifiablePersistent.OnChange

property OnChange: TNotifyEvent;

Description

OnChange is called immediately after the object changes. For example, TNotifiablePersistent's descendant TBitmap32, uses the OnChange event to notify its parent that something was changed in a bitmap, and the screen image must be updated.

Generation of OnChange events can be prevented by calling BeginUpdate.

See Also

BeginUpdate, Changed, TBitmap32, TNotifiablePersistent

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