Re: [Fxruby-users] Treelist -- can't add new items with data.

[Lyle J. <jl...@cf...>]

Hugh Sasse Staff Elec Eng wrote:

> I have a tree list, which is supposed to hold a cross platform
> directory structure: thus it maps names with spaces onto numbers
> expressed as base 36 codes.  When I add a name on its own, I can add
> to the tree, but if I put the data in, the item doesn't get added to
> the tree.  I've missed something, but I've been staring at this so
> long I can't see what it is.  The thing isn't happening when the
> "add category" button is pressed.  The crucial code is here.

<snip>

> I know that an item is selected, because when I had bugs in that
> branch of the code the thing crashed.  Do I need to fire off some
> kind of event, or something, to see the change to the tree?  When I
> just did treelist.additem(treelist.current, "name") name got added.

OK, so you are /sure/ that it's getting inside the if-check inside the 
SEL_COMMAND handler for @add_cat_btn?

     @add_cat_btn.connect(SEL_COMMAND) {
       # collect info from dialog box
       unless result.zero?
         if treelist.currentItem
           puts "Yes, I am here!"
           @treeview[path] = treelist.addItemLast(...)
         end
       end
     }

If we've confirmed that, please see what happens if you add a call to 
FXTreeList#recalc immediately following that:

     @treeview[path] = treelist.addItemLast(...)
     treelist.recalc

Calling recalc() marks a widget's layout as "dirty", meaning it nudges 
the parent layout manager to recalculate the layout for that widget and 
its siblings. At first glance, I don't see why this should be necessary, 
and so I'm skeptical that it's going to make a difference. But I've been 
wrong before ;)

If that doesn't work, let me know if you'd like me to take a closer look 
at the code.

Hope this helps,

Lyle