Method start_move

src/laybasic/laybasic/layMove.cc:325–378

}

bool
MoveService::start_move (db::Transaction *transaction, bool transient_selection)
{
  if (m_dragging) {
    return false;
  }

  std::unique_ptr<db::Transaction> trans_holder (transaction);

  bool drag_transient = false;

  if (! transaction) {

    //  unless in "continue with move" use case try to establish a selection

    if (! mp_editables->has_selection ()) {
      //  try to use the transient selection for the real one
      mp_editables->transient_to_selection ();
      drag_transient = true;
    }

    if (! mp_editables->has_selection ()) {
      //  still nothing selected
      return false;
    }

  } else {

    //  inherit transient selection mode from previous operation
    drag_transient = transient_selection;

  }

  db::DBox bbox = mp_editables->selection_bbox ();
  if (bbox.empty ()) {
    //  nothing (useful) selected
    return false;
  }

  set_cursor (lay::Cursor::size_all);

  //  emulate a "begin move" at the current mouse position if inside the box or the closest point
  //  of the box.

  db::DPoint pstart = m_mouse_pos;
  if (! bbox.contains (pstart)) {
    pstart.set_x (std::max (pstart.x (), bbox.p1 ().x ()));
    pstart.set_x (std::min (pstart.x (), bbox.p2 ().x ()));
    pstart.set_y (std::max (pstart.y (), bbox.p1 ().y ()));
    pstart.set_y (std::min (pstart.y (), bbox.p2 ().y ()));
  }

  return handle_click (pstart, 0, drag_transient, trans_holder.release ());
}

void
MoveService::finish_move ()