|index||The index of the virtual key to hide.|
Once you have created your virtual key for your devices, you may
need to debug and test that it is correctly positioned and working
properly and for that you would call the function virtual_key_show. However, you
may need to toggle this view on and off, so you can also hide the
virtual key with this function, using the index of the virtual key
that you want to hide (previously created and stored using virtual_key_add). Once you are
happy with things it is recommended that you create and place your
own graphic in its area.
The above code checks the global variable "global.Debug" and if it tests true then the virtual key indexed in the variable "global.Left" will be drawn on the screen, and if it is false then the key will be hidden.