Graphics32

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GR32🞂TCustomBitmap32🞂OnAreaChangedEventPublished

TCustomBitmap32.OnAreaChanged

Fired when a specific sub-rectangle region of the pixel buffer is modified.

Declaration ​

pascal
property OnAreaChanged: TAreaChangedEvent read FOnAreaChanged write FOnAreaChanged;

Description ​

OnAreaChanged passes the modified TRect and area change info flags to subscribers when pixel data changes.

Signature ​

pascal
type TAreaChangedEvent = procedure(Sender: TObject; const Area: TRect; const Info: Cardinal) of object;