PaintValueIndicator typedef Null safety

void PaintValueIndicator (
  1. PaintingContext context,
  2. Offset offset

Slider uses this callback to paint the value indicator on the overlay.

Since the value indicator is painted on the Overlay; this method paints the value indicator in a RenderBox that appears in the Overlay.


typedef PaintValueIndicator = void Function(PaintingContext context, Offset offset);