Re: Refresh dialog

[Phil Wolff <adiabat centurylink net>]

Under those conditions, the error you got is expected. That illustrates 
another requirement for sample code -- it should exhibit the problem 
you're having.

The code you posted contains the line "p->show_all_children()". That 
function will do just what is says -- make the children of the Paned 
widget visible. It will *not* make the Paned widget itself visible. Try 
changing that line to "p->show_all()". If that doesn't solve the 
problem, we'll need a sample that actually demonstrates the difficulty.

On 2016/07/14 21:12, Kamalpreet Grewal wrote:
> On Fri, Jul 15, 2016 at 2:57 AM, Phil Wolff <adiabat centurylink net> wrote:
> > The code you posted is incomplete and does not compile. I suspect your
> > problem is that you didn't call Gtk::ApplicationWindow::add ( vBox ). I did,
> > and it shows the "Message" column title as you would expect. It does *not*
> > display "hello" -- since the tree contains nothing that can be selected,
> > the iterator is undefined. Changing the test to "if(!iter)" causes "hello"
> > to be displayed as well. See http://pastebin.com/EGsexKmW
> >
> > If you post sample code in the future, please be sure that it will compile
> > and link without errors.
> Thank you. That cleared few things.
>
> I will add sample code from text time appropriately.
>
> I did not add vBox because I have already added it in the constructor
> of a class. In the same file, later in some function, I am updating
> contents of the vBox. As a result, I added the Gtk::Paned to vBox only
> and did not add vBox another time. If I add the vBox again, I get this
> error:
>
> gtk_box_pack: assertion 'child->parent == NULL' failed
>
> So how to proceed to refresh vBox?