using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;

namespace Server_Dashboard {
    /// <summary>
    /// Attached property base class
    /// </summary>
    /// <typeparam name="Parent"></typeparam>
    /// <typeparam name="Property"></typeparam>
    public abstract class BaseAttachedProperty<Parent, Property>
        where Parent : BaseAttachedProperty<Parent, Property>, new() {
        public event Action<DependencyObject, DependencyPropertyChangedEventArgs> ValueChanged = (sender, e) => { };
        public static Parent Instance { get; private set; } = new Parent();
        public static readonly DependencyProperty ValueProperty = DependencyProperty.RegisterAttached("Value", typeof(Property), typeof(BaseAttachedProperty<Parent, Property>), new PropertyMetadata(new PropertyChangedCallback(OnValuePropertyChanged)));
        private static void OnValuePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) {
            Instance.OnValueChanged(d, e);
            Instance.ValueChanged(d, e);
        }
        public static Property GetValue(DependencyObject d) => (Property)d.GetValue(ValueProperty);
        public static void SetValue(DependencyObject d, Property value) => d.SetValue(ValueProperty, value);
        public virtual void OnValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { }
    }
}
