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EventDictionary.cs
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EventDictionary.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace RegExplore
{
class ItemEventArgs<TKey, TValue>: EventArgs
{
public KeyValuePair<TKey, TValue> Item
{
get;
set;
}
public ItemEventArgs(TKey key, TValue value)
{
Item = new KeyValuePair<TKey, TValue>(key, value);
}
}
class EventDictionary<TKey, TValue> : Dictionary<TKey, TValue>
{
public event EventHandler<ItemEventArgs<TKey, TValue>> ItemAdded;
public event EventHandler<ItemEventArgs<TKey, TValue>> ItemRemoved;
public new void Add(TKey key, TValue value)
{
base.Add(key, value);
if (ItemAdded != null)
ItemAdded(this, new ItemEventArgs<TKey, TValue>(key, value));
}
public new bool Remove(TKey key)
{
TValue value = base[key];
bool result = base.Remove(key);
if (result && ItemRemoved != null)
ItemRemoved(this, new ItemEventArgs<TKey, TValue>(key, value));
return result;
}
public new TValue this[TKey key]
{
get
{
return base[key];
}
set
{
bool exists = base.ContainsKey(key);
base[key] = value;
if (!exists && ItemAdded != null)
ItemAdded(this, new ItemEventArgs<TKey, TValue>(key, value));
}
}
}
}