document list using RadioMenuItems

[Jacques-Donald Tournier <d tournier brain org au>]

Hi all,

I am trying to implement a list of open documents in a menu: the files 
are listed in a menu (accessed from the main menu bar) as 
RadioMenuItems. The file currently displayed is the one that is selected 
in the menu, and the list can be manipulated as run-time (i.e. documents 
can be opened/closed). I suppose this is a little bit MDI-like, but in 
my case only one document is displayed at any time (in order to preserve 
resources - this is an OpenGL application).

I'm having a few problems implementing this cleanly. I should say that 
I'm using the Menu_Helpers interface, since the UIManager interface 
makes it difficult to modify the menu structure at runtime. My problems 
are mainly to do with handling signals & callbacks. When the list is 
initially empty (i.e. there is no actual RadioButtonGroup), the 
signal_toggled() method is not emitted when the first item is added to 
the list. Also, in the callback itself, I'm having to check whether the 
callback was emitted for the RadioMenuItem that was actually selected, 
rather than the one that was just de-selected. All this is not too 
difficult to work around, but it isn't the most elegant code I've ever 
written...

So my question is: is there an easy, already worked-out solution for 
this? I'm assuming there are many applications that use a drop-down list 
of documents that are currently open, with the one that is currently 
under focus being highlighted. Does anyone have a neat solution?


Thanks for your help!

Donald.

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email;internet:d tournier brain org au
title:Research Fellow
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