Re: Problems with Gtk::Text and set_pointer and Text widget questions

[Michel Blanc <mblanc erasme org>]

"Fannin, David P." a écrit :
> I got to reading the tutorial on signal handlers again, and you need to use
> signal_connect_after if you want your signal handler to appear to have an
> effect when there is a default signal handler for the widget.  In this case,
> I was able to get the result Michel discribes by using the following:
>
> $text->signal_connect_after ("button_press_event" => \&button_press);
>
> I also changed the signal handler to insert a space and then delete it at
> the insertion point.  This seems to be the only way to actually get the Text
> widget to move the cursor.  It isn't elegant, but it works.
>
> sub button_press
> {
>         my ($text, $event) = @_;
>         my $len = $text->get_length()-1;
>         $text->set_point ($len +1);
>         $text->insert ('','','',' ');
>         $text->backward_delete (1);
> }

It seems to work most of the time. Some button_presses pass thru and it
is still possible to put the cursor in the middle of the text. I don't
know under wich conditions it happens though.
Anyway, it seems that it is hard to get to a perfect solution there, and
it is good enough for me until we have Gtk 2.0, and a rocking text
widget.

Thanks for spending time on that everybody, and thanks for the solution
David.

Last minute. I found something that works :

Connecting the handler before the stock handler used to freeze input in
the text widget. Adding David's code and 
using grab_focus does the trick :

$text->signal_connect ("button_press_event" => \&button_press);

sub button_press
{
        my ($text, $event) = @_;
        my $len = $text->get_length()-1;
        $text->set_point ($len +1);
        $text->insert ('','','',' ');
        $text->backward_delete (1);

        $text->grab_focus();

        $text->signal_emit_stop_by_name('button_press_event');
        return 1;
}


Unfortunately, this prevents mouse copy/paste operations....

I'll try to sort that out !

Thanks,

Michel.
-- 
Michel Blanc
Centre Multimédia Erasme/Parc d'activités innovantes
69930 Saint Clément-les-places
Tel : +33-(0)4-74-70-68-40 / Fax : +33-(0)4-74-70-68-40