How to get click event using Qt creator in my board

[shivcena]

Actually im running my Qt creator application in my grayhill board . Qt application is working fine but i need to get the click event of the board, because the board having 5 buttons (physical buttons) named as 1 ,2 ,3 ,4,5 . The board is same like beaglebone board. Please refer below, im having exactly same board.
These are the keycode for my device,
keycode 67 = Right
keycode 68 = Up
keycode 69 = Down
keycode 70 = Tab
keycode 71 = Return

how to get these keycode in C++ when clicking corresponding buttons.

grayhill.jpg