> Carl B. Constantine wrote:
> > I posted a note a while back about adding an "input filter" to a
> > GtkEntry widget. I recieved a couple of responces, but I don't think
> > they are what I need.
> >
> > I want the user to only be able to type numbers in a GtkEntry field. I
> > don't want to have to check the value after the fact. One person came up
> > with declaring the field cast as an INT, that may work, but I have no
> > idea how to hook that into Glade (which is generating my source at
> > present) and thus into my app.
> >
> > Does anyone have other ideas on how to do what I want?
> >
> > Thanks.
> >
>
> You could connect a callback to the gtk_entry key-press-event that
> monitors the typing and blocks any invalid characters with
> gtk_entry_set_text(); (haven't tried it)
attach the following callback to the "insert-text" signal of your gtkentry
: (it is a modification of the example given in the api of the
gtkeditable)
void
insert_digits (GtkEditable *editable,
const gchar *text,
gint length,
gint *position,
gpointer data)
{
gint i, j;
gchar *result = g_new (gchar, length);
j = 0;
for (i = 0; i < length; i++)
{
if (g_ascii_isdigit (text[i]))
{
result[j] = text[i];
j++;
}
}
g_signal_handlers_block_by_func (G_OBJECT (editable),
G_CALLBACK (insert_digits),
(gpointer)data);
gtk_editable_insert_text (editable, result, j, position);
g_signal_handlers_unblock_by_func (G_OBJECT (editable),
G_CALLBACK (insert_digits),
(gpointer)data);
g_signal_stop_emission_by_name (G_OBJECT (editable), "insert_text");
g_free (result);
}
regards
Vincent TORRI
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