331115 - Removing gtk_moz_embed from a container invalidates it

Status: RESOLVED WONTFIX

(Core Graveyard :: Embedding: GTK Widget, defect)

Description

[Scott Ellington]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051210 Epiphany/1.8.3
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051210 Epiphany/1.8.3

Once a gtk_moz_embed widget has been added to a container and shown, removing it seems to place it in an invalid state.  As when I add it right back to the same container, I get the following error:

(Gecko:28867): Gtk-CRITICAL **: gtk_container_add: assertion `GTK_IS_WIDGET (widget)' failed

If I try to do the same thing with a GtkButton, it can be removed and readded without such an error.  I will attach sample code in one sec.




Reproducible: Always

Comment 1

[Scott Ellington]

Attachment: sample code

Comment 2

[Christian Persch (GNOME) (away; not receiving bug mail)]

This is a programming error.

The docs for gtk_container_remove are quite clear:

Removes widget from container. widget must be inside container. Note that container will own a reference to widget, and that this may be the last reference held; so removing a widget from its container can destroy that widget. If you want to use widget again, you need to add a reference to it while it's not inside a container, using g_object_ref().

Comment 3

[Scott Ellington]

My mistake.  I am not familiar with C Gtk.  I am trying to reproduce a bug that occurs in Gtk#.  However, with your tip, I was able to EXACTLY reproduce my problem.

Adding the call g_object_ref ( mozembed ) before it is added to the container removes the assertion error, however you will notice that the content of the mozembed widget is blanked out when it is re-added.  This should not happen.  This is the problem I am seeing in Gtk#: http://bugzilla.ximian.com/show_bug.cgi?id=76715

I am reopening.  Thank you very much for your patience.

Comment 4

[Christian Persch (GNOME) (away; not receiving bug mail)]

(In reply to comment #3)
> however you will notice that the content of the
> mozembed widget is blanked out when it is re-added.  This should not happen. 
> This is the problem I am seeing in Gtk#:
> http://bugzilla.ximian.com/show_bug.cgi?id=76715

I think this is the same as this bug: http://bugzilla.gnome.org/show_bug.cgi?id=169116

Comment 5

[Sylvestre Ledru [:Sylvestre]]

Embedding: GTK Widget isn't a thing, closing.