checkMarqueeSelection method

void checkMarqueeSelection([ bool hover = false ])

Implementation

void checkMarqueeSelection([bool hover = false]) {
  if (marqueeStart == null || marqueeEnd == null) return;
  final selection = <Key>{};
  final rect = Rect.fromPoints(
    toLocal(marqueeStart!),
    toLocal(marqueeEnd!),
  );
  for (final child in nodes) {
    if (rect.overlaps(child.rect)) {
      selection.add(child.key);
    }
  }
  if (selection.isNotEmpty) {
    if (shiftPressed) {
      setSelection(selection.union(_selected.toSet()), hover);
    } else {
      setSelection(selection, hover);
    }
  } else {
    deselectAll(hover);
  }
}