scheduleBuildFor method

Implementation

void scheduleBuildFor(Element element) {
  assert(element != null);
  assert(element.owner == this);
  assert(() {
    if (debugPrintScheduleBuildForStacks)
      debugPrintStack(label: 'scheduleBuildFor() called for $element${_dirtyElements.contains(element) ? " (ALREADY IN LIST)" : ""}');
    if (!element.dirty) {
      throw FlutterError(
        'scheduleBuildFor() called for a widget that is not marked as dirty.\n'
        'The method was called for the following element:\n'
        '  $element\n'
        'This element is not current marked as dirty. Make sure to set the dirty flag before '
        'calling scheduleBuildFor().\n'
        'If you did not attempt to call scheduleBuildFor() yourself, then this probably '
        'indicates a bug in the widgets framework. Please report it: '
        'https://github.com/flutter/flutter/issues/new?template=BUG.md'
      );
    }
    return true;
  }());
  if (element._inDirtyList) {
    assert(() {
      if (debugPrintScheduleBuildForStacks)
        debugPrintStack(label: 'BuildOwner.scheduleBuildFor() called; _dirtyElementsNeedsResorting was $_dirtyElementsNeedsResorting (now true); dirty list is: $_dirtyElements');
      if (!_debugIsInBuildScope) {
        throw FlutterError(
          'BuildOwner.scheduleBuildFor() called inappropriately.\n'
          'The BuildOwner.scheduleBuildFor() method should only be called while the '
          'buildScope() method is actively rebuilding the widget tree.'
        );
      }
      return true;
    }());
    _dirtyElementsNeedsResorting = true;
    return;
  }
  if (!_scheduledFlushDirtyElements && onBuildScheduled != null) {
    _scheduledFlushDirtyElements = true;
    onBuildScheduled();
  }
  _dirtyElements.add(element);
  element._inDirtyList = true;
  assert(() {
    if (debugPrintScheduleBuildForStacks)
      debugPrint('...dirty list is now: $_dirtyElements');
    return true;
  }());
}