My objective is to use a `QSpinBox` to display the numbers from **0 to 9999 with the increasement of 1** using 4-digits format.

I managed to set the Maximum value 9999 by using `setMaximum` command. But I can't seems to find a way to display the values in 4digits format (eg. 0000, 0001,0002). Whenever i set the value to **0000** using `setValue` , the SpinBox display as **0**. 

How do i display the numbers in 4-digits format (i.e adding leading zero as required) in `QSpinBox`?