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);
  // If there's a pending callback that would imply this node was detached
  // between the idle phase and the next transientCallbacks phase. The tree
  // can not be mutated between those two phases so that should never happen.
  assert(!_hasPendingSystemFontsDidChangeCallBack);
  PaintingBinding.instance.systemFonts.addListener(_scheduleSystemFontsUpdate);
}