Re: remove a toolbar icon

[muppet <scott asofyet org>]

On Dec 31, 2005, at 8:59 AM, Dave M wrote:

> Ok, here's what I have:
> my $toolbar = Gtk2::Toolbar->new;
> (...several Gtk2::ToolButton->new_from_stock('gtk-stuff') here...)
> my $new_button = Gtk2::ToolButton->new_from_stock('gtk-foo') # to  
> be added later
>
> later in code:
> if($blah) {
>     $toolbar->insert($new_button, -1); # <- this part seems to work
> } elsif($foo) {
>     $toolbar->remove($new_button);
> }
>
> These are the errors that are showing during this process:
> Gtk-CRITICAL **: gtk_toolbar_remove: assertion `content_to_remove !=
> NULL' failed at ./stuff line 1064.

This assertion comes from inside the GtkToolbar virtual handler for  
GtkContainer::remove; it means that you're trying to remove a widget  
that wasn't in the toolbar.  You're probably getting into the - 
>remove branch on $new_button before $new_button has been added to  
the toolbar.

> Gtk-WARNING **: Can't set a parent on widget which has a parent
> Gtk-ERROR **: file gtkcontainer.c: line 2447

Here you've tried to add to a container a widget that is already in a  
different container.  You have to either remove first or reparent it.

> (gtk_container_propagate_expose): assertion failed: (child->parent ==
> GTK_WIDGET (container)) at ./stuff line 289.
> Aborted

This is probably just the result of broken invariants in the rest of  
the code.

> Any hints?

It would probably be easier just to add all of the buttons to the  
toolbar up front, then show and hide them as needed, and thus avoid  
all this reparenting stuff.

(The meticulous and error-prone bookkeeping here is why i suggested  
UIManager.  ;-)



--
"the ternary operator makes it a bit less ugly."
    -- kaffee