/* Copyright (C) 2008 jonathon jongsma
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <glibmm.h>
#include <iostream>

// This example will not work without properties support
// A class that contains properties must inherit from Glib::Object (or a class
// that inherits from Glib::Object)
class Person : public Glib::Object
{
public:
    Person () :
        // to register custom properties, you must register a custom GType.  If
        // you don't know what that means, don't worry, just remember to add
        // this Glib::ObjectBase constructor call to your class' constructor
        Glib::ObjectBase (typeid (Person)),
        // register the properties with the object and give them names
        prop_firstname (*this, "firstname"),
        prop_lastname (*this, "lastname"),
        // this one has a default value
        prop_age (*this, "age", 10)
    {}

    // provide proxies for the properties.  The proxy allows you to connect to
    // the 'changed' signal, etc.
    Glib::PropertyProxy<Glib::ustring> property_firstname ()
    { return prop_firstname.get_proxy (); }
    Glib::PropertyProxy<Glib::ustring> property_lastname ()
    { return prop_lastname.get_proxy (); }
    Glib::PropertyProxy<int> property_age ()
    { return prop_age.get_proxy (); }

private:
    Glib::Property<Glib::ustring> prop_firstname;
    Glib::Property<Glib::ustring> prop_lastname;
    Glib::Property<int> prop_age;
};

void on_firstname_changed ()
{ std::cout << "- firstname changed!" << std::endl; }
void on_lastname_changed ()
{ std::cout << "- lastname changed!" << std::endl; }
void on_age_changed ()
{ std::cout << "- age changed!" << std::endl; }

int main(int, char**)
{
    Glib::init ();
    Person p;
    // Register some handlers that will be called when the values of the
    // specified parameters are changed
    p.property_firstname ().signal_changed ()
        .connect (sigc::ptr_fun (&on_firstname_changed));
    p.property_lastname ().signal_changed ()
        .connect (sigc::ptr_fun (&on_lastname_changed));
    p.property_age ().signal_changed ()
        .connect (sigc::ptr_fun (&on_age_changed));

    // now change the properties and see that the handlers get called
    std::cout << "Changing the properties of 'p'" << std::endl;
    p.property_firstname () = "John";
    p.property_lastname () = "Doe";
    p.property_age () = 43;
    std::cout << "Done changing the properties of 'p'" << std::endl;

    return 0;
}