C++ Path::empty方法代码示例

//------------------------------------------------------------------------------
void ListModelWrapper::handle_popup(const int x, const int y, const int time, GdkEventButton* evb)
{
  Gtk::TreeModel::Path   path;
  Gtk::TreeView::Column *column(0);
  int                    cell_x(-1);
  int                    cell_y(-1);

  ListModelWrapper::NodeIdArray list = get_selection();

  bool there_is_path_at_pos = false;
  if (_treeview)
    there_is_path_at_pos = _treeview->get_path_at_pos(x, y, path, column, cell_x, cell_y);
  else if (_iconview)
  {
    path = _iconview->get_path_at_pos(x, y);
    there_is_path_at_pos = path.gobj() && !path.empty();
  }

  if ( there_is_path_at_pos )
  {
    // Check that @path is on selection, otherwise add @path to selection
    bec::NodeId node = get_node_for_path(path);
    // list stores current selection
    bool path_at_pos_is_in_selection = false;
    for (int i = list.size() - 1; i >= 0; --i)
    {
      if (node == list[i])
      {
        path_at_pos_is_in_selection = true;
        break;
      }
    }

    if (!path_at_pos_is_in_selection)
    {
      // Add it, if user holds Ctrl while clicking right mouse btn
      // Otherwise clear selection, and select only @path
      const bool clear_selection = evb ? (!(evb->state & GDK_CONTROL_MASK)) : false;
      if (clear_selection)
      {
        if (_treeview)
          _treeview->get_selection()->unselect_all();
        if (_iconview)
          _iconview->unselect_all();
      }

      if (_treeview)
        _treeview->get_selection()->select(path);
      if (_iconview)
        _iconview->select_path(path);

      list = get_selection();
    }
  }
  if (!_context_menu)
    _context_menu = new Gtk::Menu();

  run_menu_and_forward_action((*_tm)->get_popup_items_for_nodes(list), x, y, time, *_tm, list, _fe_menu_handler, _context_menu);
}

void MidiRuleCtrlTrigger::remove_row() {
    Gtk::TreeModel::Path cpath;
    Gtk::TreeViewColumn* col;
    tree_view.get_cursor(cpath, col);
    if (!cpath.empty()) tree_view.set_cursor(cpath);

    Gtk::TreeModel::iterator it = tree_view.get_selection()->get_selected();
    if (it) {
        Gtk::TreePath path = list_store->get_path(it);
        list_store->erase(it);

        it = tree_view.get_selection()->get_selected();
        if (!it) {
            int i = path[0];
            int n = list_store->children().size();
            if (n) {
                if (i >= n) i = n - 1;
                path[0] = i;
                tree_view.get_selection()->select(path);
            }
        }
    }
}

void MidiRuleCtrlTrigger::add_row() {
    Gtk::TreeModel::Path path;
    Gtk::TreeViewColumn* col;
    tree_view.get_cursor(path, col);
    if (!path.empty()) tree_view.set_cursor(path);

    Gtk::TreeModel::iterator it = list_store->append();
    Gtk::TreeModel::Row row = *it;

    update_model++;
    row[columns.trigger_point] = 64;
    row[columns.descending] = false;
    row[columns.vel_sensitivity] = 50;
    row[columns.key] = note_str(60);
    row[columns.note_off] = false;
    row[columns.switch_logic] = false;
    row[columns.override_pedal] = false;
    update_model--;

    tree_view.get_selection()->select(row);
    path = list_store->get_path(it);
    tree_view.scroll_to_row(path);
    tree_view.set_cursor(path);
}

//------------------------------------------------------------------------------
bec::NodeId ListModelWrapper::get_node_for_path(const Gtk::TreeModel::Path& path) const {
  if (path.empty())
    return bec::NodeId();
  return bec::NodeId(path.to_string());
}

//------------------------------------------------------------------------------
bec::NodeId TreeModelWrapper::get_node_for_path(const Gtk::TreeModel::Path& path) const {
  if (path.empty())
    return _root_node_path_dot;
  return bec::NodeId(_root_node_path_dot + path.to_string());
}