RenderFractionallySizedOverflowBox constructor

RenderFractionallySizedOverflowBox({RenderBox child, double widthFactor, double heightFactor, AlignmentGeometry alignment: Alignment.center, TextDirection textDirection })

Creates a render box that sizes its child to a fraction of the total available space.

If non-null, the widthFactor and heightFactor arguments must be non-negative.

The alignment must not be null.

The textDirection must be non-null if the alignment is direction-sensitive.

Implementation 

RenderFractionallySizedOverflowBox({
  RenderBox child,
  double widthFactor,
  double heightFactor,
  AlignmentGeometry alignment = Alignment.center,
  TextDirection textDirection,
}) : _widthFactor = widthFactor,
     _heightFactor = heightFactor,
     super(child: child, alignment: alignment, textDirection: textDirection) {
  assert(_widthFactor == null || _widthFactor >= 0.0);
  assert(_heightFactor == null || _heightFactor >= 0.0);
}