Re: odd error message

[muppet <scott asofyet org>]

On Jul 1, 2008, at 8:37 PM, Zane C.B. wrote:

> Just writing a small program to and I need to pass multiple objects
> to a function being ran by a signal, but I am currently running into a
> small issue.
>
> I am expecting the code snippet below to print out the first 3
> characters of the text view, but it prints out the error below. Line
> 74 is 'my $text=$buffer->get_text(0, 3, 1);'.

The first two arguments of Gtk2::TextBuffer::get_text() are supposed  
to be Gtk2::TextIter objects -- that is, blessed references.  You're  
passing integers.

http://gtk2-perl.sourceforge.net/doc/pod/Gtk2/TextBuffer.html#string_buffer_get_te


Iters are objects that move around by various rules of text encoding,  
language rules, etc.  To get the first three chars, you could do  
something like this:

    my $buffer = $textview->get_buffer ();

    # get bounds will give you both begin and end.  we only need begin.
    my ($begin, $end) = $buffer->get_bounds ();

    # now we want an iter that is three characters in.  start with a  
copy of begin...
    my $last = $begin->copy;
    # and advance it.
    $last->forward_chars (3);

    # now you can get the text.
    my $string = $buffer->get_text ($begin, $last, 1);

Or, if you don't mind slinging around the whole contents of the buffer  
(maybe you know it's small):

    # get it all
    my $text = $buffer->get_text ($buffer->get_bounds (), 1);

    my $first_three = substr $text, 0, 3;


> *** unhandled exception in callback:
> ***   expected a blessed reference at gzccrontab.pl line 74.
> ***  ignoring at gzccrontab.pl line 165.

Unfortunately, the code that does the argument checking doesn't really  
know which argument it needs to complain about or what that variable  
name is.  Sorry.



--
me, while driving the car: Okay, girls, what do you want for lunch?
yvonne: I wan' noo-tulls!
zella: I want lavaloli!  Can we go to the lavaloli store?
me: Um, where *is* the ravioli store?
zella: At the lavaloli store!
yvonne: I want noo-tulls!  Let's go to the noo-tull store!