1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 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;
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24 | using System.Collections.Generic;
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25 | using System.ComponentModel;
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26 | using System.Linq;
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27 | using HEAL.Attic;
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28 |
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29 | namespace HeuristicLab.Collections {
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30 | [StorableType("98A1FFF8-88D8-4A1A-BDAA-BDC3F4663C1F")]
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31 | [Serializable]
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32 | public class ObservableCollection<T> : IObservableCollection<T> {
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33 | [Storable]
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34 | protected List<T> list;
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35 |
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36 | #region Properties
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37 | public int Capacity {
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38 | get { return list.Capacity; }
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39 | set {
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40 | if (list.Capacity != value) {
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41 | list.Capacity = value;
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42 | OnPropertyChanged("Capacity");
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43 | }
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44 | }
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45 | }
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46 | public int Count {
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47 | get { return list.Count; }
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48 | }
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49 | bool ICollection<T>.IsReadOnly {
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50 | get { return ((ICollection<T>)list).IsReadOnly; }
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51 | }
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52 | #endregion
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53 |
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54 | #region Constructors
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55 | public ObservableCollection() {
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56 | list = new List<T>();
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57 | }
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58 | public ObservableCollection(int capacity) {
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59 | list = new List<T>(capacity);
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60 | }
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61 | public ObservableCollection(IEnumerable<T> collection) {
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62 | list = new List<T>(collection);
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63 | }
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64 | [StorableConstructor]
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65 | protected ObservableCollection(StorableConstructorFlag _) { }
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66 | #endregion
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67 |
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68 | #region Access
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69 | public bool Contains(T item) {
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70 | return list.Contains(item);
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71 | }
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72 |
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73 | public bool Exists(Predicate<T> match) {
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74 | return list.Exists(match);
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75 | }
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76 |
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77 | public T Find(Predicate<T> match) {
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78 | return list.Find(match);
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79 | }
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80 | public ICollection<T> FindAll(Predicate<T> match) {
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81 | return list.FindAll(match);
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82 | }
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83 | public T FindLast(Predicate<T> match) {
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84 | return list.FindLast(match);
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85 | }
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86 | #endregion
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87 |
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88 | #region Manipulation
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89 | public void Add(T item) {
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90 | int capacity = list.Capacity;
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91 | list.Add(item);
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92 | if (list.Capacity != capacity)
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93 | OnPropertyChanged("Capacity");
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94 | OnPropertyChanged("Count");
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95 | OnItemsAdded(new T[] { item });
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96 | }
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97 | public void AddRange(IEnumerable<T> collection) {
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98 | int capacity = list.Capacity;
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99 | var items = collection as ICollection<T> ?? collection.ToList();
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100 | list.AddRange(items);
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101 | if (items.Count > 0) {
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102 | OnItemsAdded(items);
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103 | if (list.Capacity != capacity)
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104 | OnPropertyChanged("Capacity");
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105 | OnPropertyChanged("Count");
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106 | }
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107 | }
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108 |
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109 | /// <summary>
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110 | /// Performs a Clear and an AddRange, but does not fire separate events for those operations
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111 | /// </summary>
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112 | /// <param name="collection"></param>
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113 | public void Replace(IEnumerable<T> collection) {
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114 | List<T> oldItems = null;
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115 | if (list.Any()) oldItems = new List<T>(list);
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116 | else oldItems = new List<T>();
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117 |
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118 | int oldCapacity = list.Capacity;
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119 | list.Clear();
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120 | list.AddRange(collection);
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121 |
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122 | List<T> items = null;
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123 | if (list.Any()) items = new List<T>(list);
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124 | else items = new List<T>();
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125 |
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126 | OnCollectionReset(items, oldItems);
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127 | if (oldCapacity != list.Capacity) OnPropertyChanged("Capacity");
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128 | if (oldItems.Count != items.Count) OnPropertyChanged("Count");
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129 | }
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130 |
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131 | public bool Remove(T item) {
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132 | if (list.Remove(item)) {
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133 | OnPropertyChanged("Count");
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134 | OnItemsRemoved(new T[] { item });
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135 | return true;
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136 | }
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137 | return false;
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138 | }
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139 | public void RemoveRange(IEnumerable<T> collection) {
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140 | if (collection == null) throw new ArgumentNullException();
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141 | List<T> items = new List<T>();
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142 | foreach (T item in collection) {
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143 | if (list.Remove(item))
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144 | items.Add(item);
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145 | }
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146 | if (items.Count > 0) {
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147 | OnPropertyChanged("Count");
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148 | OnItemsRemoved(items);
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149 | }
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150 | }
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151 | public int RemoveAll(Predicate<T> match) {
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152 | List<T> items = list.FindAll(match);
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153 | int result = 0;
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154 | if (items.Count > 0) {
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155 | result = list.RemoveAll(match);
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156 | OnPropertyChanged("Count");
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157 | OnItemsRemoved(items);
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158 | }
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159 | return result;
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160 | }
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161 |
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162 | public void Clear() {
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163 | if (list.Count > 0) {
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164 | T[] items = list.ToArray();
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165 | list.Clear();
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166 | OnPropertyChanged("Count");
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167 | OnCollectionReset(new T[0], items);
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168 | }
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169 | }
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170 | #endregion
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171 |
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172 | #region Conversion
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173 | public ReadOnlyObservableCollection<T> AsReadOnly() {
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174 | return new ReadOnlyObservableCollection<T>(this);
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175 | }
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176 | public T[] ToArray() {
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177 | return list.ToArray();
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178 | }
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179 | public void CopyTo(T[] array, int arrayIndex) {
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180 | list.CopyTo(array, arrayIndex);
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181 | }
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182 | public ICollection<TOutput> ConvertAll<TOutput>(Converter<T, TOutput> converter) {
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183 | return list.ConvertAll<TOutput>(converter);
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184 | }
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185 | #endregion
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186 |
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187 | #region Processing
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188 | public void ForEach(Action<T> action) {
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189 | list.ForEach(action);
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190 | }
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191 | public bool TrueForAll(Predicate<T> match) {
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192 | return list.TrueForAll(match);
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193 | }
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194 | #endregion
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195 |
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196 | #region Enumeration
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197 | public IEnumerator<T> GetEnumerator() {
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198 | return ((IEnumerable<T>)list).GetEnumerator();
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199 | }
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200 | IEnumerator IEnumerable.GetEnumerator() {
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201 | return ((IEnumerable)list).GetEnumerator();
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202 | }
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203 | #endregion
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204 |
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205 | #region Helpers
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206 | public void TrimExcess() {
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207 | int capacity = list.Capacity;
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208 | list.TrimExcess();
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209 | if (list.Capacity != capacity)
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210 | OnPropertyChanged("Capacity");
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211 | }
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212 | #endregion
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213 |
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214 | #region Events
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215 | [field: NonSerialized]
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216 | public event CollectionItemsChangedEventHandler<T> ItemsAdded;
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217 | protected virtual void OnItemsAdded(IEnumerable<T> items) {
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218 | CollectionItemsChangedEventHandler<T> handler = ItemsAdded;
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219 | if (handler != null) handler(this, new CollectionItemsChangedEventArgs<T>(items));
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220 | }
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221 |
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222 | [field: NonSerialized]
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223 | public event CollectionItemsChangedEventHandler<T> ItemsRemoved;
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224 | protected virtual void OnItemsRemoved(IEnumerable<T> items) {
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225 | CollectionItemsChangedEventHandler<T> handler = ItemsRemoved;
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226 | if (handler != null) handler(this, new CollectionItemsChangedEventArgs<T>(items));
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227 | }
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228 |
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229 | [field: NonSerialized]
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230 | public event CollectionItemsChangedEventHandler<T> CollectionReset;
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231 | protected virtual void OnCollectionReset(IEnumerable<T> items, IEnumerable<T> oldItems) {
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232 | CollectionItemsChangedEventHandler<T> handler = CollectionReset;
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233 | if (handler != null) handler(this, new CollectionItemsChangedEventArgs<T>(items, oldItems));
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234 | }
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235 |
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236 | [field: NonSerialized]
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237 | public event PropertyChangedEventHandler PropertyChanged;
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238 | protected virtual void OnPropertyChanged(string propertyName) {
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239 | PropertyChangedEventHandler handler = PropertyChanged;
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240 | if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
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241 | }
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242 | #endregion
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243 | }
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244 | }
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