#include <gtkmm.h>

class MainWindow;

class CEntry : public Gtk::Entry
{
public:
    CEntry ();
    void SetParent ( MainWindow* );
private:
    virtual bool on_key_press_event ( GdkEventKey* );
    MainWindow* parent;
};

class MainWindow
:
    public Gtk::Window
{
public:

    MainWindow();
    virtual ~MainWindow();
    void SetText ( const Glib::ustring& );

private:

    // Gtkmm Widgets...

    Gtk::Grid grid;
    CEntry entry;
    Gtk::Label label;
};


MainWindow::MainWindow()
{
    set_title ("Window Keys");

    entry.SetParent ( this );

    grid.set_column_homogeneous (false);
    grid.set_row_homogeneous (false);
    grid.set_row_spacing (10);

    grid.attach (entry, 0, 0, 1, 1);
    grid.attach (label, 0, 1, 1, 1);

    add (grid);

    show_all_children();
}

MainWindow::~MainWindow()
{
}

void MainWindow::SetText ( const Glib::ustring& text )
{
    label.set_text ( text );
}

CEntry::CEntry () {}

void CEntry::SetParent ( MainWindow* p )
{
    parent = p;
}

bool
CEntry::on_key_press_event (GdkEventKey * key)
{
    Glib::ustring s =
        Glib::ustring::compose ("State   : %1\n", key->state) +
        Glib::ustring::compose ("KeyVal  : %1\n", key->keyval) +
        Glib::ustring::compose ("KeyCode : %1\n", key->hardware_keycode) +
        Glib::ustring::compose ("Group   : %1\n", key->group) +
        Glib::ustring::compose ("Modifier? %1\n", key->is_modifier);
    parent->SetText ( s );
    // to get standard Entry processing as well, uncomment the next line
    //Gtk::Entry::on_key_press_event ( key );
    return true;
}

int main (int argc, char *argv[])
{
    Glib::RefPtr<Gtk::Application> app =
        Gtk::Application::create (argc, argv);

    MainWindow main_window;

    return
        app->run (main_window);
}