#region License Information
/* HeuristicLab
* Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
*
* This file is part of HeuristicLab.
*
* HeuristicLab is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* HeuristicLab 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with HeuristicLab. If not, see .
*/
#endregion
using System;
using System.Collections.Generic;
using HeuristicLab.Common;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
namespace HeuristicLab.Core {
[Item("NamedItemCollection", "Represents a collection of named items.")]
[StorableClass]
public class NamedItemCollection : KeyedItemCollection where T : class, INamedItem {
[StorableConstructor]
protected NamedItemCollection(bool deserializing) : base(deserializing) { }
protected NamedItemCollection(NamedItemCollection original, Cloner cloner)
: base(original, cloner) {
RegisterItemEvents(this);
}
public NamedItemCollection() : base() { }
public NamedItemCollection(int capacity) : base(capacity) { }
public NamedItemCollection(IEnumerable collection)
: base(collection) {
RegisterItemEvents(this);
}
[StorableHook(HookType.AfterDeserialization)]
private void AfterDeserialization() {
RegisterItemEvents(this);
}
public override IDeepCloneable Clone(Cloner cloner) {
return new NamedItemCollection(this, cloner);
}
protected override string GetKeyForItem(T item) {
return item.Name;
}
protected override void OnItemsAdded(IEnumerable items) {
RegisterItemEvents(items);
base.OnItemsAdded(items);
}
protected override void OnItemsRemoved(IEnumerable items) {
DeregisterItemEvents(items);
base.OnItemsRemoved(items);
}
#region NOTE
// NOTE: OnItemsReplaced is not overridden as ItemsReplaced is only fired
// by ObservableKeyedCollection when the key of an item has changed. The items stays
// in the collection and therefore the NameChanging, NameChanged and Changed event handler
// do not have to be removed and added again.
#endregion
protected override void OnCollectionReset(IEnumerable items, IEnumerable oldItems) {
DeregisterItemEvents(oldItems);
RegisterItemEvents(items);
base.OnCollectionReset(items, oldItems);
}
protected void RegisterItemEvents(IEnumerable items) {
foreach (T item in items) {
if (item != null) {
item.NameChanging += new EventHandler>(Item_NameChanging);
item.NameChanged += new EventHandler(Item_NameChanged);
}
}
}
private void DeregisterItemEvents(IEnumerable items) {
foreach (T item in items) {
if (item != null) {
item.NameChanging -= new EventHandler>(Item_NameChanging);
item.NameChanged -= new EventHandler(Item_NameChanged);
}
}
}
private void Item_NameChanging(object sender, CancelEventArgs e) {
e.Cancel = e.Cancel || this.ContainsKey(e.Value);
}
private void Item_NameChanged(object sender, EventArgs e) {
T item = (T)sender;
UpdateItemKey(item);
}
}
}