Re: Problem with Tabs

[Scott Burns <scott mirrabooka com>]

TORRI Vincent wrote:
> n Fri, 28 Feb 2003, Scott Burns wrote:
>
> > All the program does is create a window with a button in it, and then 
> > every second print out the memory location of the currently focused object.
> >
> > What I find is that when I press tab focus moves to something I can't 
> > see and I start getting NULL as the location of the currently focused 
> > object.  When I don't set the default object for the window, it starts 
> > with focus on the null object.  Pressing tab again toggles between the 
> > null object ans the button.
> >
> > The same thing happens with more than one object.  5 text entry screens 
> > and three buttons tabs through all the entries, all the buttons, then 
> > the null object, and back to the first object.
> >
> > So, does anyone know what I'm doing wrong, or how I can fix this?
> >
> >   
>
> Hello,
>
>  I don't know if it will help you, but the API of gtk 2.* says (about 
> gtk_window_set_default):
>  
>  Before making a widget the default widget, you must set the 
> GTK_CAN_DEFAULT flag on the widget you'd like to make the default using 
> GTK_WIDGET_SET_FLAGS().
>
> As the API of this function is not documented for gtk 1.2, perhaps it is 
> what is missing.
>
> regards
>
> Vincent TORRI
Hi,
    thanks for your response.

    Under GTK1.2 the button widget starts off with the flag set.  I did set
it again, however, with 

GTK_WIDGET_SET_FLAGS( button, GTK_CAN_DEFAULT );

    This had the strange effect of putting a 3 or so pixel border around
the button after I then called gtk_window_set_default();

Just in case this helps anyone, I have this happening on the following systems:

SCO Openserver 5.0.5 with GTK+1.2.3 from Skunkware
SCO Openserver 5.0.5 with GTK+1.2.8 compiled from sources at Skunkware
Red Hat Linux 7.2 with GTK+1.2.10 installed from RPMS distributed with OS
Red Hat Linus 8.0 with GTK+1.2.10 installed from RPMS distributed with OS

    I found out that I wasn't compiling under 2.0 on Red Hat 8.0, it was
picking up the 1.2.10 libraries and includes instead.  After forcing it to
compile under GTK+2.0.6-8 as came with Red Hat 8.0 I found the problem was
reduced.  Once the button had focus it would not leave the button.  When
I added a second button, the focus swapped between the two.  It didn't want
to focus by itself though, I had to call gtk_widget_grab_focus();

    I'm going to try to compile Gtk+2.0 for SCO, which is my target OS, but
as Gtk+2.2.1 did not compile, I'm not going to hold my breath for 2.0.  SCO
is missing XAddConnectionWatch and XProcessInternalConnection if anyone knows
how to get around this...

Scott Burns