source: trunk/sources/HeuristicLab.Parameters.Views/3.3/ValueParameterView.cs @ 2917

Last change on this file since 2917 was 2917, checked in by swagner, 12 years ago

Operator architecture refactoring (#95)

  • implemented reviewers' comments
File size: 4.8 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.Windows.Forms;
24using HeuristicLab.Core;
25using HeuristicLab.Core.Views;
26using HeuristicLab.MainForm;
27
28namespace HeuristicLab.Parameters.Views {
29  /// <summary>
30  /// The visual representation of a <see cref="Parameter"/>.
31  /// </summary>
32  [View("ValueParameter View")]
33  [Content(typeof(ValueParameter<>), true)]
34  public partial class ValueParameterView<T> : ParameterView where T : class, IItem {
35    /// <summary>
36    /// Gets or sets the variable to represent visually.
37    /// </summary>
38    /// <remarks>Uses property <see cref="ViewBase.Item"/> of base class <see cref="ViewBase"/>.
39    /// No own data storage present.</remarks>
40    public new ValueParameter<T> Content {
41      get { return (ValueParameter<T>)base.Content; }
42      set { base.Content = value; }
43    }
44
45    /// <summary>
46    /// Initializes a new instance of <see cref="VariableView"/> with caption "Variable".
47    /// </summary>
48    public ValueParameterView() {
49      InitializeComponent();
50      Caption = "ValueParameter";
51    }
52    /// <summary>
53    /// Initializes a new instance of <see cref="VariableView"/> with the given <paramref name="variable"/>.
54    /// </summary>
55    /// <remarks>Calls <see cref="VariableView()"/>.</remarks>
56    /// <param name="variable">The variable to represent visually.</param>
57    public ValueParameterView(ValueParameter<T> content)
58      : this() {
59      Content = content;
60    }
61
62    /// <summary>
63    /// Removes the eventhandlers from the underlying <see cref="IVariable"/>.
64    /// </summary>
65    /// <remarks>Calls <see cref="ViewBase.RemoveItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
66    protected override void DeregisterContentEvents() {
67      Content.ValueChanged -= new EventHandler(Content_ValueChanged);
68      base.DeregisterContentEvents();
69    }
70
71    /// <summary>
72    /// Adds eventhandlers to the underlying <see cref="IVariable"/>.
73    /// </summary>
74    /// <remarks>Calls <see cref="ViewBase.AddItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
75    protected override void RegisterContentEvents() {
76      base.RegisterContentEvents();
77      Content.ValueChanged += new EventHandler(Content_ValueChanged);
78    }
79
80    protected override void OnContentChanged() {
81      base.OnContentChanged();
82      if (Content == null) {
83        Caption = "ValueParameter";
84        viewHost.Content = null;
85        valueGroupBox.Enabled = false;
86      } else {
87        Caption = Content.Name + " (" + Content.GetType().Name + ")";
88        valueGroupBox.Enabled = true;
89        viewHost.Content = Content.Value;
90      }
91    }
92
93    protected virtual void Content_ValueChanged(object sender, EventArgs e) {
94      if (InvokeRequired)
95        Invoke(new EventHandler(Content_ValueChanged), sender, e);
96      else {
97        viewHost.Content = Content.Value;
98      }
99    }
100
101    protected virtual void valuePanel_DragEnterOver(object sender, DragEventArgs e) {
102      e.Effect = DragDropEffects.None;
103      Type type = e.Data.GetData("Type") as Type;
104      if ((type != null) && (Content.DataType.IsAssignableFrom(type))) {
105        if ((e.KeyState & 8) == 8) e.Effect = DragDropEffects.Copy;  // CTRL key
106        else if ((e.KeyState & 4) == 4) e.Effect = DragDropEffects.Move;  // SHIFT key
107        else if ((e.AllowedEffect & DragDropEffects.Link) == DragDropEffects.Link) e.Effect = DragDropEffects.Link;
108        else if ((e.AllowedEffect & DragDropEffects.Copy) == DragDropEffects.Copy) e.Effect = DragDropEffects.Copy;
109        else if ((e.AllowedEffect & DragDropEffects.Move) == DragDropEffects.Move) e.Effect = DragDropEffects.Move;
110      }
111    }
112    protected virtual void valuePanel_DragDrop(object sender, DragEventArgs e) {
113      if (e.Effect != DragDropEffects.None) {
114        T value = e.Data.GetData("Value") as T;
115        if ((e.Effect & DragDropEffects.Copy) == DragDropEffects.Copy) value = (T)value.Clone();
116        Content.Value = value;
117      }
118    }
119  }
120}
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