source: branches/2839_HiveProjectManagement/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Views/3.4/SymbolicExpressionGrammarView.cs @ 16057

Last change on this file since 16057 was 16057, checked in by jkarder, 15 months ago

#2839:

File size: 4.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2018 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.Windows.Forms;
24using HeuristicLab.Collections;
25using HeuristicLab.Core;
26using HeuristicLab.Core.Views;
27using HeuristicLab.MainForm;
28using HeuristicLab.MainForm.WindowsForms;
29
30namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Views {
31  [View("Symbolic Expression Grammar View")]
32  [Content(typeof(ISymbolicExpressionGrammar), false)]
33  public partial class SymbolicExpressionGrammarView : NamedItemView {
34    private CheckedItemList<ISymbol> symbols;
35
36    public new ISymbolicExpressionGrammar Content {
37      get { return (ISymbolicExpressionGrammar)base.Content; }
38      set { base.Content = value; }
39    }
40
41    public override bool ReadOnly {
42      get {
43        if ((Content != null) && Content.ReadOnly) return true;
44        return base.ReadOnly;
45      }
46      set {
47        if ((Content != null) && Content.ReadOnly) base.ReadOnly = true;
48        else base.ReadOnly = value;
49      }
50    }
51
52    public SymbolicExpressionGrammarView() {
53      InitializeComponent();
54      symbols = new CheckedItemList<ISymbol>();
55      symbols.CheckedItemsChanged += new CollectionItemsChangedEventHandler<IndexedItem<ISymbol>>(symbols_CheckedItemsChanged);
56    }
57
58    protected override void RegisterContentEvents() {
59      base.RegisterContentEvents();
60      Content.ReadOnlyChanged += new EventHandler(Content_ReadOnlyChanged);
61    }
62    protected override void DeregisterContentEvents() {
63      base.DeregisterContentEvents();
64      Content.ReadOnlyChanged -= new EventHandler(Content_ReadOnlyChanged);
65    }
66
67    protected override void OnContentChanged() {
68      base.OnContentChanged();
69      UpdateControl();
70    }
71
72    private void Content_ReadOnlyChanged(object sender, EventArgs e) {
73      ReadOnly = Content.ReadOnly;
74    }
75
76    #region content event handlers
77    private void Content_Changed(object sender, EventArgs e) {
78      UpdateControl();
79    }
80    #endregion
81
82    #region helpers
83    private void UpdateControl() {
84      if (Content == null) {
85        ClearSymbols();
86        checkedItemListView.Content = symbols.AsReadOnly();
87      } else {
88        ClearSymbols();
89        foreach (ISymbol symbol in Content.Symbols) {
90          if (!(symbol is IReadOnlySymbol)) {
91            symbol.Changed += new EventHandler(symbol_Changed);
92            symbols.Add(symbol, symbol.Enabled);
93          }
94        }
95        checkedItemListView.Content = symbols.AsReadOnly();
96      }
97      SetEnabledStateOfControls();
98    }
99
100
101    private void symbol_Changed(object sender, EventArgs e) {
102      ISymbol symbol = (ISymbol)sender;
103      symbols.SetItemCheckedState(symbol, symbol.Enabled);
104    }
105
106    private void symbols_CheckedItemsChanged(object sender, CollectionItemsChangedEventArgs<IndexedItem<ISymbol>> e) {
107      ICheckedItemList<ISymbol> checkedItemList = (ICheckedItemList<ISymbol>)sender;
108      foreach (var indexedItem in e.Items)
109        indexedItem.Value.Enabled = checkedItemList.ItemChecked(indexedItem.Value);
110    }
111    private void ClearSymbols() {
112      foreach (Symbol s in symbols)
113        s.Changed -= new EventHandler(symbol_Changed);
114      symbols.Clear();
115    }
116    #endregion
117  }
118}
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