DocTypeListView 0 0 564 437 DocTypeListView Support file 2 2 2 2 2 Qt::Vertical 20 40 -> <- Qt::Vertical 20 40 Custom extension 2 2 2 2 2 subToolButton clicked() DocTypeListView slot_sub() 543 207 545 429 addToolButton clicked() DocTypeListView slot_add() 533 229 526 428 slot_sub() slot_add()