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source: trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Symbols/Symbol.cs @ 6233

Last change on this file since 6233 was 6233, checked in by mkommend, 12 years ago

#1532:

  • Enabled renaming of symbols
  • Fixed cloning of grammers
  • Added readonly attribute in grammars to lock grammars during the algorithm run
  • Removed useless clone method in cloner
  • Changed CheckedItemCollectionViews to enable scrolling during the locked state
File size: 2.5 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 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 HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26
27namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
28  [StorableClass]
29  [Item("Symbol", "Represents a symbol in a symbolic function tree.")]
30  public abstract class Symbol : NamedItem, ISymbol {
31    #region Properties
32    [Storable]
33    private double initialFrequency;
34    public double InitialFrequency {
35      get { return initialFrequency; }
36      set {
37        if (value < 0.0) throw new ArgumentException("InitialFrequency must be positive");
38        if (value != initialFrequency) {
39          initialFrequency = value;
40          OnChanged(EventArgs.Empty);
41        }
42      }
43    }
44    public override bool CanChangeName {
45      get { return !(this is IReadOnlySymbol); }
46    }
47    public override bool CanChangeDescription {
48      get { return false; }
49    }
50    #endregion
51
52    [StorableConstructor]
53    protected Symbol(bool deserializing) : base(deserializing) { }
54    protected Symbol(Symbol original, Cloner cloner)
55      : base(original, cloner) {
56      initialFrequency = original.initialFrequency;
57    }
58
59    protected Symbol(string name, string description)
60      : base(name, description) {
61      initialFrequency = 1.0;
62    }
63
64    public virtual ISymbolicExpressionTreeNode CreateTreeNode() {
65      return new SymbolicExpressionTreeNode(this);
66    }
67
68    #region events
69    public event EventHandler Changed;
70    protected void OnChanged(EventArgs e) {
71      EventHandler handlers = Changed;
72      if (handlers != null)
73        handlers(this, e);
74    }
75    #endregion
76  }
77}
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