Re: Updating GtkCellRendererText after editing

[Owen Taylor <otaylor redhat com>]

On Mon, 2003-06-16 at 14:25, David M. Cook wrote:
> On Mon, Jun 16, 2003 at 05:50:49PM +0200, Sylvain Daubert wrote:
>
> > Could someone explain me how i can update my cell ?
>
> You need to set the newtext in the store.  This means you need to know which
> column of the store is associated with that renderer.  You know this when
> you're adding TreeViewColumns to the TreeView, and there are various ways to
> pass this info around: as user data when connecting the signal, using
> set_data on the renderer, as a global data structure, etc.  Excuse me for
> thinking in Python:
>
> cell = gtk.CellRendererText()
> # j is the store column to take text from
> # In C you'd probably use a pointer to a struct for user data.
> cell.connect("edited", edited_callback, store, j) 
> column = gtk.TreeViewColumn(colname, cell, text=j, ...)
>
> Then in your callback:
>
> def edited_callback(renderer, path_string, newtext, store, colno):
>     path = tuple(path_string.split(':')) #gtk_tree_path_new_from_string
>     iter = store.get_iter(path)
>     store.set(iter, colno, newtext)
>
> The API was not very well thought out here, IMO.  

If you go through all the considerations, I think you'll find it's
about the only way it *could* work. For example, the editable text
cell might not correspond to a column in the store at all, but
rather to some application data structure that is exposed via
'data_func'. 

I forget why the path_string is involved here rather than a path,
... it seems a bit strange to me at this point But the basic concept
of a callback to do the back connection from editing the view
to changing the model is unavoidable.

There is an example in C in gtk-demo.

Regards,
                                                Owen