using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace CustomWPF
{
    /// <summary>
    /// Interaction logic for Laskuri.xaml
    /// </summary>
    public partial class Laskuri : UserControl
    {
        public Laskuri()
        {
            InitializeComponent();
        }

        public static readonly RoutedEvent ChangeEvent =
            EventManager.RegisterRoutedEvent(
                "Change",
                RoutingStrategy.Bubble,
                typeof(RoutedEventHandler),
                typeof(Laskuri));

        // Provide CLR accessors for the event
        public event RoutedEventHandler Change
        {
            add { AddHandler(ChangeEvent, value); }
            remove { RemoveHandler(ChangeEvent, value); }
        }

        protected virtual void CountChanged()
        {
            RoutedEventArgs args = new RoutedEventArgs();
            args.RoutedEvent = ChangeEvent;
            RaiseEvent(args);
        }

        public static readonly DependencyProperty CountPropert =
            DependencyProperty.Register("Count", typeof(int), typeof(Laskuri));
        
        public int Count
        {
            get { return (int)GetValue(CountPropert); }
            set {
                SetValue(CountPropert, value);
                labelLaskuri.Content = Convert.ToString(value);

                //LISÄÄ TARKISTUS ETTEI CountChanged():iä suoriteta,
                // jos kukaan ei ole kiinnostunut niistä
                //if (??? != null)
                {
                    //MessageBox.Show("CountChange executed");
                    CountChanged(); //lisää diff-parametri!
                }
            }
        }
    }
}