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source: stable/HeuristicLab.Parameters/3.3/ValueLookupParameter.cs @ 17883

Last change on this file since 17883 was 17181, checked in by swagner, 5 years ago

#2875: Merged r17180 from trunk to stable

File size: 6.4 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Drawing;
24using HEAL.Attic;
25using HeuristicLab.Common;
26using HeuristicLab.Core;
27
28namespace HeuristicLab.Parameters {
29  /// <summary>
30  /// A parameter whose value is either defined in the parameter itself or is retrieved from the scope.
31  /// </summary>
32  [Item("ValueLookupParameter", "A parameter whose value is either defined in the parameter itself or is retrieved from or written to a scope.")]
33  [StorableType("B34BB41A-CF50-4275-9BCD-1861EBA7C58F")]
34  public class ValueLookupParameter<T> : LookupParameter<T>, IValueLookupParameter<T> where T : class, IItem {
35    public override Image ItemImage {
36      get {
37        if (value != null) return value.ItemImage;
38        else return base.ItemImage;
39      }
40    }
41
42    [Storable]
43    private T value;
44    public T Value {
45      get { return this.value; }
46      set {
47        if (ReadOnly) throw new InvalidOperationException("Cannot set the value of a readonly parameter.");
48        if (value != this.value) {
49          DeregisterValueEvents();
50          this.value = value;
51          RegisterValueEvents();
52          OnValueChanged();
53        }
54      }
55    }
56    IItem IValueParameter.Value {
57      get { return Value; }
58      set {
59        T val = value as T;
60        if ((value != null) && (val == null))
61          throw new InvalidOperationException(
62            string.Format("Type mismatch. Value is not a \"{0}\".",
63                          typeof(T).GetPrettyName())
64          );
65        Value = val;
66      }
67    }
68
69    [Storable(DefaultValue = false)]
70    private bool readOnly;
71    public bool ReadOnly {
72      get { return readOnly; }
73      set {
74        if (value == readOnly) return;
75        readOnly = value;
76        OnReadOnlyChanged();
77      }
78    }
79
80    [Storable(DefaultValue = true)]
81    private bool getsCollected;
82    public bool GetsCollected {
83      get { return getsCollected; }
84      set {
85        if (value != getsCollected) {
86          getsCollected = value;
87          OnGetsCollectedChanged();
88        }
89      }
90    }
91
92    #region Constructors
93    [StorableConstructor]
94    protected ValueLookupParameter(StorableConstructorFlag _) : base(_) { }
95    protected ValueLookupParameter(ValueLookupParameter<T> original, Cloner cloner)
96      : base(original, cloner) {
97      value = cloner.Clone(original.value);
98      readOnly = original.readOnly;
99      getsCollected = original.getsCollected;
100      RegisterValueEvents();
101    }
102    public ValueLookupParameter()
103      : base() {
104      this.readOnly = false;
105      this.Hidden = false;
106      this.getsCollected = true;
107    }
108    public ValueLookupParameter(string name)
109      : base(name) {
110      this.readOnly = false;
111      this.Hidden = false;
112      this.getsCollected = true;
113    }
114    public ValueLookupParameter(string name, T value)
115      : base(name) {
116      this.value = value;
117      this.readOnly = false;
118      this.Hidden = false;
119      this.getsCollected = true;
120      RegisterValueEvents();
121    }
122    public ValueLookupParameter(string name, string description)
123      : base(name, description) {
124      this.readOnly = false;
125      this.Hidden = false;
126      this.getsCollected = true;
127    }
128    public ValueLookupParameter(string name, string description, T value)
129      : base(name, description) {
130      this.value = value;
131      this.readOnly = false;
132      this.Hidden = false;
133      this.getsCollected = true;
134      RegisterValueEvents();
135    }
136    public ValueLookupParameter(string name, string description, string actualName)
137      : base(name, description, actualName) {
138      this.readOnly = false;
139      this.Hidden = false;
140      this.getsCollected = true;
141    }
142    #endregion
143
144    [StorableHook(HookType.AfterDeserialization)]
145    private void AfterDeserialization() {
146      RegisterValueEvents();
147    }
148
149    public override IDeepCloneable Clone(Cloner cloner) {
150      return new ValueLookupParameter<T>(this, cloner);
151    }
152
153    public override string ToString() {
154      if (Value != null)
155        return Name + ": " + Value.ToString();
156      else if (Name.Equals(ActualName))
157        return Name;
158      else
159        return Name + ": " + ActualName;
160    }
161
162    public event EventHandler ValueChanged;
163    protected virtual void OnValueChanged() {
164      EventHandler handler = ValueChanged;
165      if (handler != null) handler(this, EventArgs.Empty);
166      OnItemImageChanged();
167      OnToStringChanged();
168    }
169    public event EventHandler ReadOnlyChanged;
170    protected virtual void OnReadOnlyChanged() {
171      EventHandler handler = ReadOnlyChanged;
172      if (handler != null) handler(this, EventArgs.Empty);
173    }
174    public event EventHandler GetsCollectedChanged;
175    protected virtual void OnGetsCollectedChanged() {
176      EventHandler handler = GetsCollectedChanged;
177      if (handler != null) handler(this, EventArgs.Empty);
178    }
179
180    private void RegisterValueEvents() {
181      if (value != null) {
182        value.ItemImageChanged += new EventHandler(Value_ItemImageChanged);
183        value.ToStringChanged += new EventHandler(Value_ToStringChanged);
184      }
185    }
186    private void DeregisterValueEvents() {
187      if (value != null) {
188        value.ItemImageChanged -= new EventHandler(Value_ItemImageChanged);
189        value.ToStringChanged -= new EventHandler(Value_ToStringChanged);
190      }
191    }
192    private void Value_ItemImageChanged(object sender, EventArgs e) {
193      OnItemImageChanged();
194    }
195    private void Value_ToStringChanged(object sender, EventArgs e) {
196      OnToStringChanged();
197    }
198  }
199}
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