1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Generic;
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24 | using HeuristicLab.Common;
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25 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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26 |
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27 | namespace HeuristicLab.Core {
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28 | [Item("NamedItemCollection", "Represents a collection of named items.")]
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29 | [StorableClass]
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30 | public class NamedItemCollection<T> : KeyedItemCollection<string, T> where T : class, INamedItem {
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31 | [StorableConstructor]
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32 | protected NamedItemCollection(bool deserializing) : base(deserializing) { }
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33 | protected NamedItemCollection(NamedItemCollection<T> original, Cloner cloner)
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34 | : base(original, cloner) {
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35 | RegisterItemEvents(this);
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36 | }
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37 | public NamedItemCollection() : base() { }
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38 | public NamedItemCollection(int capacity) : base(capacity) { }
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39 | public NamedItemCollection(IEnumerable<T> collection)
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40 | : base(collection) {
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41 | RegisterItemEvents(this);
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42 | }
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43 |
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44 | [StorableHook(HookType.AfterDeserialization)]
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45 | private void AfterDeserialization() {
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46 | RegisterItemEvents(this);
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47 | }
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48 |
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49 | public override IDeepCloneable Clone(Cloner cloner) {
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50 | return new NamedItemCollection<T>(this, cloner);
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51 | }
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52 |
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53 | protected override string GetKeyForItem(T item) {
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54 | return item.Name;
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55 | }
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56 |
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57 | protected override void OnItemsAdded(IEnumerable<T> items) {
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58 | RegisterItemEvents(items);
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59 | base.OnItemsAdded(items);
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60 | }
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61 | protected override void OnItemsRemoved(IEnumerable<T> items) {
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62 | DeregisterItemEvents(items);
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63 | base.OnItemsRemoved(items);
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64 | }
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65 | #region NOTE
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66 | // NOTE: OnItemsReplaced is not overridden as ItemsReplaced is only fired
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67 | // by ObservableKeyedCollection when the key of an item has changed. The items stays
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68 | // in the collection and therefore the NameChanging, NameChanged and Changed event handler
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69 | // do not have to be removed and added again.
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70 | #endregion
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71 | protected override void OnCollectionReset(IEnumerable<T> items, IEnumerable<T> oldItems) {
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72 | DeregisterItemEvents(oldItems);
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73 | RegisterItemEvents(items);
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74 | base.OnCollectionReset(items, oldItems);
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75 | }
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76 |
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77 | protected void RegisterItemEvents(IEnumerable<T> items) {
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78 | foreach (T item in items) {
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79 | if (item != null) {
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80 | item.NameChanging += new EventHandler<CancelEventArgs<string>>(Item_NameChanging);
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81 | item.NameChanged += new EventHandler(Item_NameChanged);
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82 | }
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83 | }
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84 | }
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85 | private void DeregisterItemEvents(IEnumerable<T> items) {
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86 | foreach (T item in items) {
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87 | if (item != null) {
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88 | item.NameChanging -= new EventHandler<CancelEventArgs<string>>(Item_NameChanging);
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89 | item.NameChanged -= new EventHandler(Item_NameChanged);
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90 | }
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91 | }
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92 | }
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93 |
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94 | private void Item_NameChanging(object sender, CancelEventArgs<string> e) {
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95 | e.Cancel = e.Cancel || this.ContainsKey(e.Value);
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96 | }
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97 | private void Item_NameChanged(object sender, EventArgs e) {
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98 | T item = (T)sender;
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99 | UpdateItemKey(item);
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100 | }
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101 | }
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102 | }
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