table editor with combobox

Hi, Using Vaadin 7.0.2, I’m trying to enable arrow keys to navigate the cells of a table, which is filled with textfields and comboboxes. I got this mostly working, but when I press an arrow key in the combobox textfield (when it has focus), it opens the dropdown and moves according to my arrow navigation. I need something like box.close() or box.hideDropdown(). I tried various methods in ComboBox but I couldn’t get it right. I tried box.setValue(“NULL”) to hide the dropdown and table.markAsDirty() to request repaint, but the black shadow still remained. Is there a way to reset the combobox or ignore the arrow keys until the popup is open? Thank you.