source: trunk/sources/HeuristicLab.Core.Views/3.3/VariableView.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: 6.1 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.Common;
25using HeuristicLab.MainForm;
26
27namespace HeuristicLab.Core.Views {
28  /// <summary>
29  /// The visual representation of a <see cref="Variable"/>.
30  /// </summary>
31  [View("Variable View")]
32  [Content(typeof(Variable), true)]
33  [Content(typeof(IVariable), false)]
34  public partial class VariableView : NamedItemView {
35    protected TypeSelectorDialog typeSelectorDialog;
36
37    /// <summary>
38    /// Gets or sets the variable to represent visually.
39    /// </summary>
40    /// <remarks>Uses property <see cref="ViewBase.Item"/> of base class <see cref="ViewBase"/>.
41    /// No own data storage present.</remarks>
42    public new IVariable Content {
43      get { return (IVariable)base.Content; }
44      set { base.Content = value; }
45    }
46
47    /// <summary>
48    /// Initializes a new instance of <see cref="VariableView"/> with caption "Variable".
49    /// </summary>
50    public VariableView() {
51      InitializeComponent();
52      Caption = "Variable";
53    }
54    /// <summary>
55    /// Initializes a new instance of <see cref="VariableView"/> with the given <paramref name="variable"/>.
56    /// </summary>
57    /// <remarks>Calls <see cref="VariableView()"/>.</remarks>
58    /// <param name="variable">The variable to represent visually.</param>
59    public VariableView(IVariable content)
60      : this() {
61      Content = content;
62    }
63
64    /// <summary>
65    /// Removes the eventhandlers from the underlying <see cref="Variable"/>.
66    /// </summary>
67    /// <remarks>Calls <see cref="ViewBase.RemoveItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
68    protected override void DeregisterContentEvents() {
69      Content.ValueChanged -= new EventHandler(Content_ValueChanged);
70      base.DeregisterContentEvents();
71    }
72
73    /// <summary>
74    /// Adds eventhandlers to the underlying <see cref="Variable"/>.
75    /// </summary>
76    /// <remarks>Calls <see cref="ViewBase.AddItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
77    protected override void RegisterContentEvents() {
78      base.RegisterContentEvents();
79      Content.ValueChanged += new EventHandler(Content_ValueChanged);
80    }
81
82    protected override void OnContentChanged() {
83      base.OnContentChanged();
84      if (Content == null) {
85        Caption = "Variable";
86        dataTypeTextBox.Text = "-";
87        dataTypeTextBox.Enabled = false;
88        setValueButton.Enabled = false;
89        clearValueButton.Enabled = false;
90        valueGroupBox.Enabled = false;
91        viewHost.Content = null;
92      } else {
93        Caption = Content.Name + " (" + Content.GetType().Name + ")";
94        dataTypeTextBox.Text = Content.Value == null ? "-" : Content.Value.GetType().GetPrettyName();
95        dataTypeTextBox.Enabled = Content.Value != null;
96        setValueButton.Enabled = Content.Value == null;
97        clearValueButton.Enabled = Content.Value != null;
98        valueGroupBox.Enabled = true;
99        viewHost.Content = Content.Value;
100      }
101    }
102
103    protected virtual void Content_ValueChanged(object sender, EventArgs e) {
104      if (InvokeRequired)
105        Invoke(new EventHandler(Content_ValueChanged), sender, e);
106      else {
107        dataTypeTextBox.Text = Content.Value == null ? "-" : Content.Value.GetType().GetPrettyName();
108        dataTypeTextBox.Enabled = Content.Value != null;
109        setValueButton.Enabled = Content.Value == null;
110        clearValueButton.Enabled = Content.Value != null;
111        viewHost.Content = Content.Value;
112      }
113    }
114
115    protected virtual void setValueButton_Click(object sender, EventArgs e) {
116      if (typeSelectorDialog == null) {
117        typeSelectorDialog = new TypeSelectorDialog();
118        typeSelectorDialog.Caption = "Select Value Type";
119        typeSelectorDialog.TypeSelector.Configure(typeof(IItem), false, false);
120      }
121      if (typeSelectorDialog.ShowDialog(this) == DialogResult.OK) {
122        Content.Value = (IItem)typeSelectorDialog.TypeSelector.CreateInstanceOfSelectedType();
123      }
124    }
125    protected virtual void clearValueButton_Click(object sender, EventArgs e) {
126      Content.Value = null;
127    }
128    protected virtual void valuePanel_DragEnterOver(object sender, DragEventArgs e) {
129      e.Effect = DragDropEffects.None;
130      Type type = e.Data.GetData("Type") as Type;
131      if ((type != null) && (typeof(IItem).IsAssignableFrom(type))) {
132        if ((e.KeyState & 8) == 8) e.Effect = DragDropEffects.Copy;  // CTRL key
133        else if ((e.KeyState & 4) == 4) e.Effect = DragDropEffects.Move;  // SHIFT key
134        else if ((e.AllowedEffect & DragDropEffects.Link) == DragDropEffects.Link) e.Effect = DragDropEffects.Link;
135        else if ((e.AllowedEffect & DragDropEffects.Copy) == DragDropEffects.Copy) e.Effect = DragDropEffects.Copy;
136        else if ((e.AllowedEffect & DragDropEffects.Move) == DragDropEffects.Move) e.Effect = DragDropEffects.Move;
137      }
138    }
139    protected virtual void valuePanel_DragDrop(object sender, DragEventArgs e) {
140      if (e.Effect != DragDropEffects.None) {
141        IItem item = e.Data.GetData("Value") as IItem;
142        if ((e.Effect & DragDropEffects.Copy) == DragDropEffects.Copy) item = (IItem)item.Clone();
143        Content.Value = item;
144      }
145    }
146  }
147}
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