Re: error in a GtkEditable

[Angelo Cano <acano systec com>]

On Thu, Mar 29, 2001 at 10:29:33AM -0100, guigtk wrote:
> I want limit the lenght of the text to 5.
> The code works fine ¿?, but the program shows in the console:
>
> Gtk-CRITICAL **: file gtktext.c: line 879 (gtk_text_set_point):
> assertion `index <= TEXT_LENGTH (text)' failed.
> ¿What happens?
> This is the code:
>
> void
> on_text1_insert_text                   (GtkEditable     *editable,
>                                         gchar           *new_text,
>                                         gint            
> new_text_length,
>                                         gint            *position,
>                                         gpointer         user_data)
> {
> gint a;
>
> a=gtk_text_get_length(GTK_TEXT (editable));
> if (a>5) {gtk_editable_delete_text(GTK_EDITABLE(editable), 5, 6);}
> }
>
> This function is called by a "insert_text" signal.
>
> Thanks a million
> Guillermo
>
>  ___________________________________________________________________ 
> Consigue tu e-mail gratuito TERRA.ES
>  Haz clic en http://www.terra.es/correo/

#include <gtk/gtk.h>

gint insert_text_cb (GtkWidget   *editable, 
                     const gchar *text, 
                     gint         length,
                     gint        *position)
{
    gint a;

    a = gtk_text_get_length (GTK_TEXT (editable));
    /* compare it to 'a + length' instead of just 'a' to handle cut and paste */
    if (a + length > 5) {
        gtk_signal_emit_stop_by_name (GTK_OBJECT (editable), "insert_text");
        return TRUE;
    }

    return FALSE;
}

int main (int argc, char *argv[])
{
    GtkWidget *window, *text;

    gtk_init (&argc, &argv);

    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

    text = gtk_text_new (NULL, NULL);
    gtk_text_set_editable (GTK_TEXT (text), TRUE);
    gtk_signal_connect (GTK_OBJECT (text),
                        "insert_text",
                        GTK_SIGNAL_FUNC (insert_text_cb),
                        NULL);
    gtk_container_add (GTK_CONTAINER (window), text);

    gtk_widget_show_all (window);
    gtk_main ();

    return 0;
}