childExtent property

double childExtent

@protected

The dimension of the child in the main axis.

Implementation

@protected
double get childExtent {
  if (child == null)
    return 0.0;
  assert(child.hasSize);
  assert(constraints.axis != null);
  switch (constraints.axis) {
    case Axis.vertical:
      return child.size.height;
    case Axis.horizontal:
      return child.size.width;
  }
  return null;
}