Method onDrag

src/redempt/redlib/inventorygui/InventoryGUI.java:416–427

(InventoryDragEvent e)

    }

    @EventHandler
    public void onDrag(InventoryDragEvent e) {
        List<Integer> slots = e.getRawSlots().stream().filter(s -> getInventory(e.getView(), s).equals(inventory)).collect(Collectors.toList());
        if (slots.size() == 0) {
            return;
        }
        if (!openSlots.containsAll(slots)) {
            e.setCancelled(true);
            return;
        }
        onDragOpenSlot.accept(e);
    }

    private Inventory getInventory(InventoryView view, int rawSlot) {
        return rawSlot < view.getTopInventory().getSize() ? view.getTopInventory() : view.getBottomInventory();