source: trunk/sources/HeuristicLab.Core.Views/3.3/ItemView.cs @ 11555

Last change on this file since 11555 was 11555, checked in by ascheibe, 5 years ago

#2158 added error handling for view nesting problem

File size: 2.1 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2014 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.MainForm.WindowsForms;
25
26namespace HeuristicLab.Core.Views {
27  /// <summary>
28  /// Base class for all visual representations.
29  /// </summary>
30  public partial class ItemView : AsynchronousContentView {
31    public const int MaximumNestingLevel = 37;
32
33    public new IItem Content {
34      get { return (IItem)base.Content; }
35      set { base.Content = value; }
36    }
37
38    /// <summary>
39    /// Initializes a new instance of <see cref="ViewBase"/> with the caption "View".
40    /// </summary>
41    public ItemView() {
42      InitializeComponent();
43    }
44
45    protected override void OnInitialized(EventArgs e) {
46      base.OnInitialized(e);
47
48      if (CountParentControls() > MaximumNestingLevel) {
49        NestingLevelErrorControl errorControl = new NestingLevelErrorControl();
50        errorControl.Dock = DockStyle.Fill;
51        //capture content, needed because it is set at a later time
52        errorControl.Content = () => Content;
53
54        Controls.Clear();
55        Controls.Add(errorControl);
56      }
57    }
58
59    private int CountParentControls() {
60      int cnt = 0;
61      Control parent = Parent;
62      while (parent != null) {
63        parent = parent.Parent;
64        cnt++;
65      }
66      return cnt;
67    }
68  }
69}
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