RenderCustomPaint constructor

RenderCustomPaint({CustomPainter painter, CustomPainter foregroundPainter, Size preferredSize: Size.zero, bool isComplex: false, bool willChange: false, RenderBox child })

Creates a render object that delegates its painting.

Implementation 

RenderCustomPaint({
  CustomPainter painter,
  CustomPainter foregroundPainter,
  Size preferredSize = Size.zero,
  this.isComplex = false,
  this.willChange = false,
  RenderBox child,
}) : assert(preferredSize != null),
     _painter = painter,
     _foregroundPainter = foregroundPainter,
     _preferredSize = preferredSize,
     super(child);