Code snippet: drawmenu with catching user action

[Stefan]

Here is a code snippet which someone might find useful. I adapted an earlier example of veeblefester, and made it a little bit shorter.
It can be used as a drop-in replacement for the drawmenu() function: The function takes as argument a list with the labels for the 6 softbuttons. It returns the ID of the button which was pressed.

Edit: Thanks to Han a better version is available in my post below. I removed the old code.