Re: How do I validate/limit/filter the input to a Gtk::Entry?

[Robert Caryl <bob fis-cal com>]

Try connecting to "signal_changed" instead of "signal_insert_text".

Bob

Tomasz Ostrowski wrote:
> I'm trying to translate a sample program from GTK FAQ
> 	6.15. How do I validate/limit/filter the input to a GtkEntry?
> 	http://www.gtk.org/faq/#AEN843
> to GTKmm.
>
> But it does not work and I don't know why. I've attached my program.
> Could you help me, please?
>
> Regards
> Tometzky
>   
> ------------------------------------------------------------------------
>
> #include <gtkmm.h>
>
> class AlphaUpperEntry : public Gtk::Entry
> {
> public:
> 	AlphaUpperEntry();
> protected:
> 	virtual void insert_text_handler(Glib::ustring const& text,int* position);
> 	sigc::connection insert_text_connection;
> };
>
> AlphaUpperEntry::AlphaUpperEntry()
> {
> 	insert_text_connection = signal_insert_text().connect(
> 		sigc::mem_fun(*this, &AlphaUpperEntry::insert_text_handler)
> 	);
> }
>
> void AlphaUpperEntry::insert_text_handler(Glib::ustring const& text, int* position)
> {
> 	Glib::ustring result; result.reserve(text.size());
> 	
> 	for ( Glib::ustring::const_iterator it = text.begin(); it != text.end(); it++ ) {
> 		if ( Glib::Unicode::isalpha(*it) ) {
> 			result += Glib::Unicode::toupper(*it);
> 		}
> 	}
> 	
> 	if ( ! result.empty() ) {
> 		insert_text_connection.block();
> 		insert_text(result, result.size(), *position);
> 		insert_text_connection.unblock();
> 	}
> 	
> 	signal_insert_text().emission_stop();
> }
>
> int main(int argc, char* argv[])
> {
> 	Gtk::Main kit(argc, argv);
>
> 	AlphaUpperEntry entry;
> 	
> 	Gtk::Window window;
> 	window.set_title("AlphaUpperEntry");
> 	window.add(entry);
> 	window.show_all();
> 	kit.run(window);
> 	
> 	return 0;
> }
>   
> ------------------------------------------------------------------------
>
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