gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );
gint old_pos = gtk_editable_get_position( GTK_EDITABLE(m_text) );
char *text = gtk_editable_get_chars( GTK_EDITABLE(m_text), start, end );