[Glade-users] Treeview doesnt refresh upon reopenning window

[darkeen at westnet.com.au (Jason Brisbane)]

Hello,

Yes, I realised the "error of my ways" at about 3AM this morning.
Woke up and thought "Damn, why did I do that for?"

After checking the GTK doc I realised that what I should have done is
this:
- DONT destroy anything.
- Dont ceate a new treeview.
- Create the liststore as usual.
- use: gtk_tree_view_set_model (GTK_TREE_VIEW(lookup_widget(widget,
"treeview4")), GTK_TREE_MODEL(list_store));

According to the documentation, this will automatically destroy and
remove any previous model and hook the new model into the Treeview.(I
wont have to worry about memory freeing, but I *miht* have to free
the list_store. I shouldnt need to worry if the list_store is a local
variable though, should I?)

I wont have to recreate the entire treeview, just the
model/list_store.
AND it still keeps with the hide/show modelling that the GTK
tutorials and PHP/Mysql examples all referred to (from the SAMS
publishing website).

Thanks for your comments. They helped me rethink the issues I was
having and got me to this stage!


Regards,
Jason Brisbane

> ---- Original Message ----
> From: damon at karuna.eclipse.co.uk
> To: darkeen at westnet.com.au
> Subject: Re: [Glade-users] Treeview doesnt refresh upon reopenning
> window
> Date: Mon, 23 Apr 2007 16:31:39 +0100
>
> > On Mon, 2007-04-23 at 22:14 +0800, Jason Brisbane wrote:
> > > Hello All,
> > >
> > > I am looking for a fix for a Treeview issue that I am having.
> > >
> > > I have created a Treeview that gets its data from a database and 
> > > populates the list with the results of the database.
> > > This works well as even if the database table was empty (rows=0)
> then it 
> > > still displays the headers (better than I thought).
> > >
> > > In my example, I have a treeview on one half of the screen and the
>
> > > database fields showing the data on the right (table). This shows
> the 
> > > data just wonderfully.
> > > If I add a record, or conversely if I select a record and delete
> it, the 
> > > treeview doesnt get updated.
> > > I am calling the _show function after each time, but I dont
> believe that 
> > > the gtk_destroy_treeview is actually doing its job. Surely it
> would kill 
> > > the treeview, model, store, and everything with it when you kill
> it?
> > > Here is the "_show" code. Of course this works fine on starting
> the 
> > > window the first time but doesnt refresh.
> > > I get the following message when the window tries to update:
> > > (battlemaster:11819): Gtk-CRITICAL **: gtk_scrolled_window_add: 
> > > assertion `bin->child == NULL' failed
> >
> >
> >
> > >  gtk_widget_destroy(lookup_widget(widget, "treeview4"));
> >
> > That "lookup_widget" call will only work the first time, won't it?
> > After that the particular treeview will no longer exist.
> >
> > Maybe you should get the child of the scrolled window and
> > gtk_container_remove() that instead.
> >
> > Damon