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source: trunk/sources/HeuristicLab.MainForm.WindowsForms/3.3/ContentView.cs @ 4435

Last change on this file since 4435 was 4435, checked in by mkommend, 13 years ago

Adjusted the SetEnabledStateOfControls method in all views, added the Enabled property into the IView interface and adapted the ViewHost, View and ContentView class (ticket #1155).

File size: 3.9 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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.Reflection;
24using System.Windows.Forms;
25using HeuristicLab.Common;
26
27namespace HeuristicLab.MainForm.WindowsForms {
28  public partial class ContentView : View, IContentView {
29    public ContentView()
30      : base() {
31      InitializeComponent();
32      this.locked = false;
33    }
34
35    private IContent content;
36    public IContent Content {
37      get { return content; }
38      set {
39        //check if the ContentView is tagged with a corresponding ContentAttribute for the type of the Content
40        if ((value != null) && (!MainFormManager.ViewCanViewContent(this, value)) &&
41          ContentAttribute.HasContentAttribute(this.GetType()))
42          throw new ArgumentException(string.Format("View \"{0}\" cannot view object \"{1}\".", this.GetType().Name, value.GetType().Name));
43        if (InvokeRequired) {
44          Invoke(new Action<IContent>(delegate(IContent o) { this.Content = o; }), value);
45        } else {
46          if (this.content != value) {
47            this.SuspendRepaint();
48            if (this.content != null) this.DeregisterContentEvents();
49            this.content = value;
50            if (this.content != null) this.RegisterContentEvents();
51            this.OnContentChanged();
52            this.SetEnabledStateOfControls();
53            this.OnChanged();
54            this.ResumeRepaint(true);
55          }
56        }
57      }
58    }
59
60    private bool locked;
61    public virtual bool Locked {
62      get { return this.locked; }
63      set {
64        if (InvokeRequired) {
65          Action<bool> action = delegate(bool b) { this.Locked = b; };
66          Invoke(action, value);
67        } else {
68          if (value != locked) {
69            locked = value;
70            OnLockedChanged();
71            SetEnabledStateOfControls();
72            PropertyInfo prop = typeof(IContentView).GetProperty("Locked");
73            PropagateStateChanges(this, typeof(IContentView), prop);
74            OnChanged();
75          }
76        }
77      }
78    }
79    public event EventHandler LockedChanged;
80    protected virtual void OnLockedChanged() {
81      if (InvokeRequired)
82        Invoke((MethodInvoker)OnLockedChanged);
83      else {
84        EventHandler handler = LockedChanged;
85        if (handler != null)
86          handler(this, EventArgs.Empty);
87      }
88    }
89    /// <summary>
90    /// Adds eventhandlers to the current instance.
91    /// </summary>
92    protected virtual void RegisterContentEvents() {
93    }
94
95    /// <summary>
96    /// Removes the eventhandlers from the current instance.
97    /// </summary>
98    protected virtual void DeregisterContentEvents() {
99    }
100
101    /// <summary>
102    /// Is called when the content property changes.
103    /// </summary>
104    protected virtual void OnContentChanged() {
105    }
106
107    /// <summary>
108    /// This method is called if the ReadyOnly, Locked or Content property of the ContentView changes to update the controls of the view.
109    /// </summary>
110    protected override void SetEnabledStateOfControls() {
111      base.SetEnabledStateOfControls();
112      Enabled = Content != null;
113    }
114  }
115}
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