performRebuild method

@override void performRebuild()

Cause the component to update itself.

Called by BuildOwner after the appropriate checks have been made.

Implementation

@override
void performRebuild() {
  assert(_debugSetAllowIgnoredCallsToMarkNeedsBuild(true));
  Component? built;
  try {
    assert(() {
      _debugDoingBuild = true;
      return true;
    }());
    built = build();
    assert(() {
      _debugDoingBuild = false;
      return true;
    }());
  } catch (e, st) {
    _debugDoingBuild = false;
    // TODO: implement actual error handling
    built = Component.element(
      tag: 'div',
      styles: const Styles(
        padding: Padding.all(Unit.em(2)),
        backgroundColor: Colors.red,
        color: Colors.yellow,
        fontSize: Unit.rem(1),
      ),
      children: [Component.text('Error on building component: $e')],
    );
    binding.reportBuildError(this, e, st);
  } finally {
    _dirty = false;
    assert(_debugSetAllowIgnoredCallsToMarkNeedsBuild(false));
  }

  _child = updateChild(_child, built, slot);
}