1using System;
 2using System.ComponentModel;
 3using solidware.financials.windows.ui.presenters.validation;
 4
 5namespace solidware.financials.windows.ui.views.controls
 6{
 7    public class ObservableProperty<T> : Observable<T>, IDataErrorInfo
 8    {
 9        T value;
10
11        public ObservableProperty() : this(default(T)) {}
12
13        public ObservableProperty(T value)
14        {
15            this.value = value;
16            Notification = new Notification<Observable<T>>();
17        }
18
19        public Notification<Observable<T>> Notification { get; private set; }
20
21        public T Value
22        {
23            get { return value; }
24            set
25            {
26                this.value = value;
27                PropertyChanged(this, new PropertyChangedEventArgs("Value"));
28            }
29        }
30
31        public void WhenChanged(Action observer)
32        {
33            PropertyChanged += (o, e) => observer();
34        }
35
36        public void Register<TSeverity>(Func<T, bool> failCondition, Func<string> errorMessage) where TSeverity : Severity, new()
37        {
38            Notification.Register<TSeverity>(x => x.Value, () => failCondition(Value), errorMessage);
39        }
40
41        object Observable.Value
42        {
43            get { return value; }
44        }
45
46        static public implicit operator T(ObservableProperty<T> val)
47        {
48            return val.value;
49        }
50
51        public event PropertyChangedEventHandler PropertyChanged = (o, e) => {};
52
53        public override string ToString()
54        {
55            return value.ToString();
56        }
57
58        public string this[string property]
59        {
60            get { return Notification[property]; }
61        }
62
63        public string Error
64        {
65            get { throw new NotImplementedException(); }
66        }
67    }
68}