[Mono-list] Liststore not appending correctly

[Juan C. Olivares]

I think (my opinion) Application.Invoke should work as you expect it to
work. By this I mean it should not queue the delegate but to execute it
before it returns. But as i see, it's adding the delegate to a queue, that's
why it's adding just 9, 9, 9, 9... because when it executes the delegate, i
== 9, and you may be already out of the loop.

That's my theory but I don't have answers. I think the Control.Invoke method
in Windows waits until the delegate is executed and then it returns, but
this is other toolkit... so they can have different behavior :)

Anyway, try other options:
http://www.mono-project.com/Responsive_Applications

JCO

On 3/21/07, Nil Gradisnik <ghaefbgtk at gmail.com> wrote:
>
> I need your opinion on this one. I'm running a Thread which starts this
> function named PopulateTreevew() and in there this is what happens:
>
> //populate treeview
> public void PopulateTreeviewThreadRoutine()
> {
>         Gtk.Application.Invoke (delegate {
>                 liststore.Clear();
>         });
>
>         for (int i = 0; i < 10; i++) {
>
>                 Console.WriteLine (i); //THIS one works
>                 Gtk.Application.Invoke (delegate {
>                         Console.WriteLine (i); //THIS one sometimes works
>                         liststore.AppendValues (i);
>                 });
>         }
>
>         Gtk.Application.Invoke (delegate {
>                 Treeview1.Model = liststore;
>         });
> }
>
> My main problem is that I sometimes get all the same(the last) contents
> of my variable array to my Treeview, using liststore.AppendValues... I
> tested this values with Console.WriteLine.
> As you can see I'm using Gtk.Application.Invoke, because I'm running a
> Thread outside the main GTK thread.
>
> So basically I narrowed it down to this, that if I print out those
> variables(arrays) before the Gtk.Application.Invoke, it always prints
> out OK, the numbers(i) are 0,1,2,3,4,5,6...9. But If I print them out
> inside Gtk.Application.Invoke I sometimes(randomly) get just all 9s !
> That is 9,9,9,9,9.......9.
>
> Why is that ? What could cause this problem, I don't understand.
> It looks like a bug in Gtk.Application.Invoke or something.
>
> Can I use something else than Gtk.Application.Invoke, so that I get out
> the correct array?
> Because it looks like the Gtk.Application.Invoke messes up things
> randomly.
>
>
> Please advise
>
> Thanks
>
>
> Nil Gradisnik
>
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-- 
Juan Cristóbal Olivares
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