Embedded products, only rely on four arrow keys to move the cursor to the controls, the implementation method is to obtain all the current interface controls, rewrite eventfilters(), when press the direction key, look for the control of nearest distance from the current control, setFocus to it.But this can be useful for a single interface, if there is a pop-up box or stackWidget interface, very trouble, so could you please tell me do you have any good solution.