discontinuedPackage jet_cad_floor_plan has been discontinued and replaced by jet_cad_2d_plan.

changeSizeCommand function

CompoundCommand? changeSizeCommand(DraftDocument doc, Handle instance, SymbolEntry entry)

The Change size step (D7, decision 9): instance takes entry's definition (reused or copied, definitionForEntry), its linear part kept and its translation chosen so the new box's back-left corner (left', back') lands where the old (left, back) was. Null when the instance already draws entry's key (re-picking the checked size is not a size change: it would copy a fresh definition over an older version or an edited one), or a box is missing.

Implementation

CompoundCommand? changeSizeCommand(
    DraftDocument doc, Handle instance, SymbolEntry entry) {
  final node = doc.tree[instance];
  if (node is! InstanceNode) return null;
  if (doc.components.get<SymbolComponent>(node.definition)?.key == entry.key) {
    return null;
  }
  final oldBox = boxOfDefinition(doc, node.definition);
  final newBox = boxOfEntry(entry);
  if (oldBox == null || newBox == null) return null;
  final made = definitionForEntry(doc, entry);
  if (made.definition == node.definition) return null;
  final t = node.transform;
  final corner = t.transformPoint(Vector2(oldBox.left, oldBox.back));
  final next = Transform2(
    t.a,
    t.b,
    t.c,
    t.d,
    _clean(corner.x - (t.a * newBox.left + t.c * newBox.back)),
    _clean(corner.y - (t.b * newBox.left + t.d * newBox.back)),
  );
  return CompoundCommand([
    ...made.commands,
    SetInstanceDefinitionCommand(instance, made.definition),
    TransformNodeCommand(instance, next),
  ], label: 'Change size');
}