[mythtv] Plugin UI: Creating Buttons

[Jeremy Gillick]

I'm trying to create my first full plugin and am having trouble figuring 
out how to create buttons.  I want to display a number of simple textual 
buttons, but all the examples I see in other plugins reference images.  
Can somebody explain how to create a simple button or point me to a good 
reference?

For more information, here's what I'm trying to do:  My wife likes the 
way Tivo lets you find programs to record, so I'm trying to duplicate 
that in myth.  It's a simple interface that finds and lists programs as 
you select letters.  It looks something like this:

 Batt           |
----------      |
DEL CLR SPACE   | Batters Up
A B C D E       | Battle of the Bulge
F G H I J       | Battlestar Galactica
K L M N O       |
P Q R S T       |
U V W Z Y       |
Z               |

As you select letters, they automatically get appended to the word above 
and the list on the right is narrowed down.  When your program is 
displayed on the right, you can use the right arrow button to go to that 
side and select the program.  For example, if 'J' is selected, pressing 
the right arrow would select 'Battlestar Galactica'.

Any thoughts on how to build this interface and code would be very helpful.

Thanks,
Jeremy