Re: Help with CellRendererPopup

[muppet <scott asofyet org>]

On Jul 11, 2004, at 7:01 PM, Daniel Kasak wrote:

> I've been trying in vain for more hours than I'd care to admit to get 
> a modified example working ... the Mup::CellRendererPopup.

then you're not going to like how simple the problem is.  ;-)  short 
answer: the column type is wrong.


> This is what I've got so far ( please excuse what Mozilla does to my 
> formatting ):
>
> > $slist = Gtk2::SimpleList->new_from_treeview(
> >                                                 
> > $prospects->get_widget('TelecomAccounts_SList'),
> >                                                 'ID'                  
> >   => 'hidden',
> >                                                 'AccountNo'           
> >   => 'text',
> >                                                 'Supplier_index'      
> >   => 'int',
> >                                                 'Notes'               
> >   => 'text',
> >                                                 'Need Itemisation'    
> >   => 'bool',
> >                                                 'Suppliers'           
> >   => 'text'
> >                                             );
...
> > $column = Gtk2::TreeViewColumn->new_with_attributes (
> >                                                         'Supplier',
> >                                                         $renderer,
> >                                                         list        
> > => 5,
> >                                                         'index'     
> > => 2,
> >                                                     );

you're telling the column to set the Mup::CellRendererPopup object's 
'list' property from the value in the model's column 5.  the popup's 
'list' property is defined as a boxed type of 'Glib::Scalar', because 
you're supposed to put a list reference in it; however, your model's 
column 5 is defined to contain 'Glib::String' data (that's what 
SimpleList uses for the 'text' column type).  'Glib::String' means 
'char*'.

so, two problems arise from this:

1) your list reference, created with

> >     push @list_data, [ $rec[0], $rec[1], $rec[2], $rec[3], $rec[4], [ 
> > sort(@telecom_suppliers) ] ];

gets stringified, which isn't what you want.


2) when the column is asked to set the data for the popup render, it 
fetches the data from the model as a string (char*, known to the glib 
type system as 'gchararray'), and passes that value to the popup cell 
renderer, but the type system sees that the cell renderer wants a boxed 
object of type 'Glib::Scalar', which is registered with the C type 
system as 'GPerlSV'.  there is no way to convert that, so you get this 
warning:

> > GLib-GObject-WARNING **: unable to set property `list' of type 
> > `GPerlSV' from value of type `gchararray' at /home/dan/sales/sales.pl 
> > line 3178.

and the set operation aborts, leaving the cell to be rendered with 
empty data.


> Anyone know what I'm doing wrong?

maybe.  ;-)


use a 'scalar' column type when you create the simplelist.

note that in the cellrenderer_popup.pl example's driver code, the list 
data column is created as 'Glib::Scalar', and i used a custom cell data 
callback to format the list for display.


--
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me: uh, i suppose so.
elysse: will you put them on me?