layout method

  1. @override
void layout(
  1. Context context,
  2. BoxConstraints constraints, {
  3. bool parentUsesSize = false,
})
override

First widget pass to calculate the children layout and bounding box

Implementation

@override
void layout(Context context, BoxConstraints constraints,
    {bool parentUsesSize = false}) {
  final constraints = _getConstraints(context);

  if (child != null) {
    child!.layout(context, constraints, parentUsesSize: false);
    assert(child!.box != null);
  }

  box = _getBox(context);
}