Re: Two SimpleLists with one data stucture

[muppet <scott asofyet org>]

On May 29, 2006, at 11:50 AM, Vasya Leushin wrote:
> I got stuck in another problem. This time I need to represent this
> structure in one (simple?)list in following manner.
>
>  $v = [[ 1,'Color1',128,[[10,5,'White'],[20,15,'Blue'],]]];
>        |__|_______|____|______________________________|
> cols     1    2      3       4
>
> Column 4 is a CellRendererCombo. 'White','Blue' are entries in Combo
> which works like this:
> if i choose 'White' in Combo, then value in column 3 is set to 5,
> if i choose 'Blue' column 3 is set to 15 and so on...

Welcome to the world of Things That SimpleList Should Not Be Twisted  
Into Doing.

SimpleList doesn't know how to use CellRendererCombo.  Making it use  
one will result in such a twisted mess that you'd be better off  
dropping SimpleList and using the bare TreeModel/TreeView APIs  
directly.  In either case, you'll get to know those APIs pretty well,  
and it's easier if you have a blank slate instead of trying to  
squeeze things into the SimpleList framework.

(I'm not saying don't use SimpleList.  I'm saying use SimpleList for  
Simple Lists, not complicated ones.)


The first thing to remember is that the model and the view are not  
the same.  Above, you showed the outline of the data structure that  
lives in the model, and then said "Column 4 is a CellRendererCombo".   
The model knows nothing of cell renderers, so you're obviously  
talking about the view, but i am confused as to whether you're  
implying that the data in column 4 should also be showing in the cell.

Also, the cell editing is not automatic.  With CellRendererCombo,  
you'll have to set the "editable" property to true for the cell to be  
in any way distinguishable from a CellRendererText, and then you'll  
have to connect a handler to the CellRenderText's "edited" signal and  
figure out how to apply the user's changes to your data structures.

Some questions come up that prevent me coming up with a useful  
example...  what should the combo renderer display when not showing  
the menu, what do the columns mean, etc, etc.  Can you describe the  
context of the problem in a bit more detail?


--
"that's it! you're a genius!"  "yes.  that's what i think.  do you  
think i deserve a raise?"
    - dialogue from 'Godzilla versus Mothra', 1964