[Glade-users] Where is the input callback method in glade?

[Tristan Van Berkom]

On Thu, Oct 6, 2011 at 3:28 AM, Rottengatter, Peter <
Peter.Rottengatter at bakerhughes.com> wrote:

>
> The infinite loop is easily avoided by setting a flag while modifying the
> text withing the handler, and testing the flag at the beginning of the
> handler (not exactly a beautiful solution, but I'm sure it works). This way
> your intented functionality can be implemented with GtkEntry.
>
>
FWIW, for this recursion check you can use
g_signal_handlers_block/unblock_by_func().

Cheers


> I have no experience with GtkTextView though. It's not a GtkEditable, hence
> the details of how to implement this will be different.
>
> Regards
>
> Peter Rottengatter
>
> -----Original Message-----
> From: Ferdinand Ramirez [mailto:ramirez.ferdinand at yahoo.com]
> Sent: 06 October 2011 08:18
> To: Rottengatter, Peter; glade-users at lists.ximian.com
> Subject: RE: [Glade-users] Where is the input callback method in glade?
>
> Thanks. I tried something similar with GtkTextBuffer and it worked, but I
> cannot modify the text, only block it or let it through. If I modify it, and
> insert the modified text into the buffer from within the callback, I end up
> in an infinite loop.
>
> Is there another way you know, using GtkTextView perhaps?
>
> Thanks,
> -Ferdinand
>
> --- On Wed, 10/5/11, Rottengatter, Peter <
> Peter.Rottengatter at bakerhughes.com> wrote:
>
> > From: Rottengatter, Peter <Peter.Rottengatter at bakerhughes.com>
> > Subject: RE: [Glade-users] Where is the input callback method in glade?
> > To: "Ferdinand Ramirez" <ramirez.ferdinand at yahoo.com>, "
> glade-users at lists.ximian.com" <glade-users at lists.ximian.com>
> > Date: Wednesday, October 5, 2011, 12:46 AM
> >
> > Read
> >
> http://developer.gnome.org/gtk/stable/GtkEditable.html#GtkEditable-insert-text
> >
> >
> > I use the following code to restrict input to numerical
> > characters (so that the user can only enter positive integer
> > numbers):
> >
> > ...
> > GtkEntry  *entry = gtk_entry_new();
> > gtk_signal_connect (G_OBJECT (entry), "insert-text",
> > G_CALLBACK (entry_insert), NULL);
> > ...
> >
> > void entry_insert (GtkEditable *entry, char *new, gint len,
> > gpointer position, gpointer data)
> > {
> >   gboolean  faulty = FALSE;
> >   for (int i = 0; i < len; i++)
> >   {
> >     if (! isdigit (new[i]))
> >       faulty = TRUE;
> >   }
> >   if (faulty)
> >   {
> >     g_signal_stop_emission_by_name ((gpointer)
> > entry, "insert-text");
> >   }
> > }
> >
> >
> > Regards
> >
> > Peter Rottengatter
> >
> > -----Original Message-----
> > From: glade-users-bounces at lists.ximian.com
> > [mailto:glade-users-bounces at lists.ximian.com]
> > On Behalf Of Ferdinand Ramirez
> > Sent: 04 October 2011 13:55
> > To: glade-users at lists.ximian.com
> > Subject: [Glade-users] Where is the input callback method
> > in glade?
> >
> > Where is the callback to keyboard input in glade. I want
> > this so that I can respond to each letter that is input.
> >
> > As as example, I was looking at the tutorial at
> http://www.micahcarrick.com/files/gtk-glade-tutorial/C/main.c
> > and was wondering how the callback method for keyboard
> > inputs can be enabled and how I could modify it.
> >
> > For simplicity, let us say that I want to be able to print
> > out the characters on the terminal as I input them in the
> > above program. I then want to update the buffer instead of
> > letting some hidden function in glade do it for me. How do I
> > achieve this?
> >
> > I'm just using the above example since it is simple and
> > neatly written.
> >
> > Thanks,
> > -Ferdinand
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