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/* 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;
}
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