Re: Adding a customer cell renderer to a simplelist

[Daniel Kasak <dkasak nusconsulting com au>]

muppet wrote:

> On Aug 26, 2004, at 9:24 PM, Daniel Kasak wrote:
>
> > So far, I've got:
> >
> > ---
>
>
> [create simplelist with 6 columns (2 hidden)]
> ...
> [create new column with custom renderer class and no attribute, and 
> append that to the view]
>
> > The column gets added to the simplelist, and the spinbutton renderer 
> > appears when I edit the cell, but data that I load into the 
> > simplelist doesn't get into the cellrenderer.
>
>
>
> you're seeing no data in your added column because you haven't told 
> the view column from which model column to retrieve its data.
>
> in cellrenderer_spinbutton.pl, we add the columns with this statement:
>
>   my $column = Gtk2::TreeViewColumn -> new_with_attributes ("no digits",
>                                                             $renderer,
>                                                             value => 0);
>
> "value" is the name of the CellRendererSpinButton property that 
> contains the value that will be displayed.  "0" is the index of the 
> model column containing the data we want the view column to display.  
> the model column 0 is created with the type Glib::Double.  it's the 
> all-important "value => $model_column_index" that is missing from your 
> new_with_attributes() call.

Still no joy here :(

I'm a little unsure of how the columns are numbered ( whether hidden 
columns count or not ). I started out by assuming that they *do* count, 
so I used:

>     my $renderer = Gtk2::CellRendererSpinButton->new();
>    
>     $renderer->set(
>                         mode    => "editable",
>                         min     => 0,
>                         max     => 1000,
>                         step    => 1,
>                         digits  => 0
>                   );
>    
>     $renderer->signal_connect(edited => \&locations_postcode_cell_edited);
>    
>     $column = Gtk2::TreeViewColumn->new_with_attributes(
>                                                             "Postcode",
>                                                             $renderer,
>                                                             value   => 6
>                                                        );
>    
>     $locations_slist->{widget}->append_column($column);

That gave me:

> can't set value for column 6, model only has 6 columns at 
> /usr/lib/perl5/vendor_perl/5.8.4/i686-linux/Gtk2/SimpleList.pm line 238.
> can't set value for column 6, model only has 6 columns at 
> /usr/lib/perl5/vendor_perl/5.8.4/i686-linux/Gtk2/SimpleList.pm line 238.

and then a ( long ) string of:

> Gtk-CRITICAL **: file gtkliststore.c: line 569 
> (gtk_list_store_get_value): assertion `column < GTK_LIST_STORE 
> (tree_model)->n_columns' failed at /home/dan/sales/sales.pl line 5097.
> GLib-GObject-CRITICAL **: file gobject.c: line 1239 
> (g_object_set_property): assertion `G_IS_VALUE (value)' failed at 
> /home/dan/sales/sales.pl line 5097.
> GLib-GObject-CRITICAL **: file gvalue.c: line 149 (g_value_unset): 
> assertion `G_IS_VALUE (value)' failed at /home/dan/sales/sales.pl line 
> 5097.

errors.

If I set value to 5 ( or less ), I get:

> can't set value for column 6, model only has 6 columns at 
> /usr/lib/perl5/vendor_perl/5.8.4/i686-linux/Gtk2/SimpleList.pm line 238.
> can't set value for column 6, model only has 6 columns at 
> /usr/lib/perl5/vendor_perl/5.8.4/i686-linux/Gtk2/SimpleList.pm line 238.

and then a string of:

> GLib-GObject-WARNING **: unable to set property `value' of type 
> `gdouble' from value of type `gchararray' at /home/dan/sales/sales.pl 
> line 5097.

errors.

It still doesn't seem like my new column is being 'registered' as far as 
the SimpleList is concerned...

I've just had an idea now: am I supposed to have *another* column with 
the value to be used for the custom cellrenderer to look at ( ie am I 
supposed to define the 'PostCode' column when I first create the 
SimpleList and then just set it's width to zero? )? I've tried mucking 
around with this for a little while but it doesn't seem to help either. 
I drop the:

> can't set value for column 6, model only has 6 columns at 
> /usr/lib/perl5/vendor_perl/5.8.4/i686-linux/Gtk2/SimpleList.pm line 238.

errors, but still can't get my custom column to display anything.

--
Daniel Kasak
IT Developer
NUS Consulting Group
Level 5, 77 Pacific Highway
North Sydney, NSW, Australia 2060
T: (+61) 2 9922-7676 / F: (+61) 2 9922 7989
email: dkasak nusconsulting com au
website: http://www.nusconsulting.com.au

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