On 20 July 2012 07:50, Frank Cox <thea...@melvilletheatre.com> wrote: > How can I check if a GtkWidget exists? > > I am planning to create and destroy widgets in a window depending on the > user's > selections, but I can't figure out how to determine if a particular widget > already exists in the window so it won't be created twice or receive a > second deletion attempt if it's already gone. > > I tried checking GTK_WIDGET_REALIZED but it appears that if the widget has > previously been destroyed then the GTK_WIDGET_REALIZED tries to access it > anyway and gives me an error. > > Is there a way to determine if a widget is already in a window without having > to maintain my own table?
I would just accept it is not possible and create my own data struct containing a GtkWidget* for each widget type I want to create. Initialize them to zero and only allow creation of a certain widget type if the appropriate pointer is zero, and conversely, only allow deletion if the pointer is non-zero. Ensure to set the pointer to zero after deleting the widget. g_object_ref and g_object_unref also spring to mind, but I'm fairly sure this is not the type of scenario where you'd use them and will probably only cause confusion. James. _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
