attach method

  1. @override
void attach(
  1. PipelineOwner owner
)
override

Mark this render object as attached to the given owner.

Typically called only from the parent's attach method, and by the owner to mark the root of a tree as attached.

Subclasses with children should override this method to attach all their children to the same owner after calling the inherited method, as in super.attach(owner).

Implementation

@override
void attach(PipelineOwner owner) {
  super.attach(owner);
  _horizontalOffset.addListener(markNeedsLayout);
  _verticalOffset.addListener(markNeedsLayout);
  _delegate.addListener(_handleDelegateNotification);
  for (final RenderBox child in _children.values) {
    child.attach(owner);
  }
  for (final RenderBox child in _keepAliveBucket.values) {
    child.attach(owner);
  }
}