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source: trunk/sources/HeuristicLab.Parameters.Views/3.3/ValueLookupParameterView.cs @ 4905

Last change on this file since 4905 was 4522, checked in by mkommend, 14 years ago

Enabled dropping of values on various views (ticket #1155).

File size: 7.6 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.Core;
26using HeuristicLab.Core.Views;
27using HeuristicLab.MainForm;
28using HeuristicLab.PluginInfrastructure;
29
30namespace HeuristicLab.Parameters.Views {
31  /// <summary>
32  /// The visual representation of a <see cref="Parameter"/>.
33  /// </summary>
34  [View("ValueLookupParameter View")]
35  [Content(typeof(ValueLookupParameter<>), true)]
36  [Content(typeof(IValueLookupParameter<>), false)]
37  public partial class ValueLookupParameterView<T> : ParameterView where T : class, IItem {
38    protected TypeSelectorDialog typeSelectorDialog;
39
40    /// <summary>
41    /// Gets or sets the variable to represent visually.
42    /// </summary>
43    /// <remarks>Uses property <see cref="ViewBase.Item"/> of base class <see cref="ViewBase"/>.
44    /// No own data storage present.</remarks>
45    public new IValueLookupParameter<T> Content {
46      get { return (IValueLookupParameter<T>)base.Content; }
47      set { base.Content = value; }
48    }
49
50    /// <summary>
51    /// Initializes a new instance of <see cref="VariableView"/> with caption "Variable".
52    /// </summary>
53    public ValueLookupParameterView() {
54      InitializeComponent();
55    }
56
57    /// <summary>
58    /// Removes the eventhandlers from the underlying <see cref="IVariable"/>.
59    /// </summary>
60    /// <remarks>Calls <see cref="ViewBase.RemoveItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
61    protected override void DeregisterContentEvents() {
62      Content.ActualNameChanged -= new EventHandler(Content_ActualNameChanged);
63      Content.GetsCollectedChanged -= new EventHandler(Content_GetsCollectedChanged);
64      Content.ValueChanged -= new EventHandler(Content_ValueChanged);
65      base.DeregisterContentEvents();
66    }
67
68    /// <summary>
69    /// Adds eventhandlers to the underlying <see cref="IVariable"/>.
70    /// </summary>
71    /// <remarks>Calls <see cref="ViewBase.AddItemEvents"/> of base class <see cref="ViewBase"/>.</remarks>
72    protected override void RegisterContentEvents() {
73      base.RegisterContentEvents();
74      Content.ActualNameChanged += new EventHandler(Content_ActualNameChanged);
75      Content.GetsCollectedChanged += new EventHandler(Content_GetsCollectedChanged);
76      Content.ValueChanged += new EventHandler(Content_ValueChanged);
77    }
78
79    protected override void OnContentChanged() {
80      base.OnContentChanged();
81      if (Content == null) {
82        actualNameTextBox.Text = "-";
83        showInRunCheckBox.Checked = false;
84        valueViewHost.Content = null;
85      } else {
86        SetDataTypeTextBoxText();
87        actualNameTextBox.Text = Content.ActualName;
88        showInRunCheckBox.Checked = Content.GetsCollected;
89        valueViewHost.ViewType = null;
90        valueViewHost.Content = Content.Value;
91      }
92    }
93
94    protected override void SetEnabledStateOfControls() {
95      base.SetEnabledStateOfControls();
96      actualNameTextBox.Enabled = Content != null;
97      actualNameTextBox.ReadOnly = ReadOnly;
98      setValueButton.Enabled = Content != null && !ReadOnly;
99      clearValueButton.Enabled = Content != null && Content.Value != null && !ReadOnly;
100      showInRunCheckBox.Enabled = Content != null && !ReadOnly;
101    }
102
103    protected virtual void Content_ActualNameChanged(object sender, EventArgs e) {
104      if (InvokeRequired)
105        Invoke(new EventHandler(Content_ActualNameChanged), sender, e);
106      else
107        actualNameTextBox.Text = Content.ActualName;
108    }
109    protected virtual void Content_ValueChanged(object sender, EventArgs e) {
110      if (InvokeRequired)
111        Invoke(new EventHandler(Content_ValueChanged), sender, e);
112      else {
113        SetDataTypeTextBoxText();
114        clearValueButton.Enabled = Content != null && Content.Value != null && !ReadOnly;
115        valueViewHost.ViewType = null;
116        valueViewHost.Content = Content != null ? Content.Value : null;
117      }
118    }
119    protected virtual void Content_GetsCollectedChanged(object sender, EventArgs e) {
120      if (InvokeRequired)
121        Invoke(new EventHandler(Content_GetsCollectedChanged), sender, e);
122      else
123        showInRunCheckBox.Checked = Content != null && Content.GetsCollected;
124    }
125
126    protected virtual void actualNameTextBox_Validated(object sender, EventArgs e) {
127      Content.ActualName = actualNameTextBox.Text;
128    }
129    protected virtual void setValueButton_Click(object sender, EventArgs e) {
130      if (typeSelectorDialog == null) {
131        typeSelectorDialog = new TypeSelectorDialog();
132        typeSelectorDialog.Caption = "Select Value";
133        typeSelectorDialog.TypeSelector.Configure(Content.DataType, false, true);
134      }
135      if (typeSelectorDialog.ShowDialog(this) == DialogResult.OK) {
136        try {
137          Content.Value = (T)typeSelectorDialog.TypeSelector.CreateInstanceOfSelectedType();
138        }
139        catch (Exception ex) {
140          ErrorHandling.ShowErrorDialog(this, ex);
141        }
142      }
143    }
144    protected virtual void clearValueButton_Click(object sender, EventArgs e) {
145      Content.Value = null;
146    }
147    protected virtual void showInRunCheckBox_CheckedChanged(object sender, EventArgs e) {
148      if (Content != null) Content.GetsCollected = showInRunCheckBox.Checked;
149    }
150    protected virtual void valueGroupBox_DragEnterOver(object sender, DragEventArgs e) {
151      e.Effect = DragDropEffects.None;
152      Type type = e.Data.GetData("Type") as Type;
153      if (!ReadOnly && (type != null) && (Content.DataType.IsAssignableFrom(type))) {
154        if ((e.KeyState & 32) == 32) e.Effect = DragDropEffects.Link;  // ALT key
155        else if ((e.KeyState & 4) == 4) e.Effect = DragDropEffects.Move;  // SHIFT key
156        else if ((e.AllowedEffect & DragDropEffects.Copy) == DragDropEffects.Copy) e.Effect = DragDropEffects.Copy;
157        else if ((e.AllowedEffect & DragDropEffects.Move) == DragDropEffects.Move) e.Effect = DragDropEffects.Move;
158        else if ((e.AllowedEffect & DragDropEffects.Link) == DragDropEffects.Link) e.Effect = DragDropEffects.Link;
159      }
160    }
161    protected virtual void valueGroupBox_DragDrop(object sender, DragEventArgs e) {
162      if (e.Effect != DragDropEffects.None) {
163        T value = e.Data.GetData("Value") as T;
164        if ((e.Effect & DragDropEffects.Copy) == DragDropEffects.Copy) value = (T)value.Clone();
165        Content.Value = value;
166      }
167    }
168
169    #region Helpers
170    protected void SetDataTypeTextBoxText() {
171      if (Content == null) {
172        dataTypeTextBox.Text = "-";
173      } else {
174        if ((Content.Value != null) && (Content.Value.GetType() != Content.DataType))
175          dataTypeTextBox.Text = Content.DataType.GetPrettyName() + " (" + Content.Value.GetType().GetPrettyName() + ")";
176        else
177          dataTypeTextBox.Text = Content.DataType.GetPrettyName();
178      }
179    }
180    #endregion
181  }
182}
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