YMapView map = new YMapView(RubyHelper.toInt(system, "@start_map_id"), project);
map.installClickSupport();
map.setSelectX(RubyHelper.toInt(system, "@start_x"));
map.setSelectY(RubyHelper.toInt(system, "@start_y"));
map.installMapChance();
// show
if (YDialog.show(I18N.t("Start Position"), "map", map, true)) {
//
RubyHelper.setNum(system, "@start_x", map.getSelectX());