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source: stable/HeuristicLab.Core.Views/3.3/TypeSelector.cs @ 11158

Last change on this file since 11158 was 11158, checked in by mkommend, 10 years ago

#2206: Reverse merged r11157.

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File size: 15.7 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 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.Collections.Generic;
24using System.Linq;
25using System.Reflection;
26using System.Text;
27using System.Windows.Forms;
28using HeuristicLab.Common;
29using HeuristicLab.PluginInfrastructure;
30
31namespace HeuristicLab.Core.Views {
32  public partial class TypeSelector : UserControl {
33    protected List<TreeNode> treeNodes;
34    protected string currentSearchString;
35    protected TypeSelectorDialog typeSelectorDialog;
36
37    protected IEnumerable<Type> baseTypes;
38    public IEnumerable<Type> BaseTypes {
39      get { return baseTypes; }
40    }
41    protected bool showNotInstantiableTypes;
42    public bool ShowNotInstantiableTypes {
43      get { return showNotInstantiableTypes; }
44    }
45    protected bool showGenericTypes;
46    public bool ShowGenericTypes {
47      get { return showGenericTypes; }
48    }
49    public string Caption {
50      get { return typesGroupBox.Text; }
51      set {
52        if (InvokeRequired)
53          Invoke(new Action<string>(delegate(string s) { Caption = s; }), value);
54        else
55          typesGroupBox.Text = value;
56      }
57    }
58    public TreeView TypesTreeView {
59      get { return typesTreeView; }
60    }
61    protected Type selectedType;
62    public Type SelectedType {
63      get { return selectedType; }
64      private set {
65        if (value != selectedType) {
66          selectedType = value;
67          OnSelectedTypeChanged();
68        }
69      }
70    }
71
72    public TypeSelector() {
73      InitializeComponent();
74      treeNodes = new List<TreeNode>();
75      currentSearchString = string.Empty;
76      selectedType = null;
77    }
78
79    protected override void Dispose(bool disposing) {
80      if (disposing) {
81        if (typeSelectorDialog != null) typeSelectorDialog.Dispose();
82        if (components != null) components.Dispose();
83      }
84      base.Dispose(disposing);
85    }
86
87    public virtual void Configure(Type baseType, bool showNotInstantiableTypes, bool showGenericTypes) {
88      Configure(baseType, showNotInstantiableTypes, showGenericTypes, (t) => true);
89    }
90
91    public virtual void Configure(Type baseType, bool showNotInstantiableTypes, bool showGenericTypes, Func<Type, bool> typeCondition) {
92      Configure(new List<Type>() { baseType }, showNotInstantiableTypes, showGenericTypes, true, typeCondition);
93    }
94
95    public virtual void Configure(IEnumerable<Type> baseTypes, bool showNotInstantiableTypes, bool showGenericTypes, bool assignableToAllTypes) {
96      Configure(baseTypes, showNotInstantiableTypes, showGenericTypes, assignableToAllTypes, (t) => { return true; });
97    }
98
99    public virtual void Configure(IEnumerable<Type> baseTypes, bool showNotInstantiableTypes, bool showGenericTypes, bool assignableToAllTypes, Func<Type, bool> typeCondition) {
100      if (baseTypes == null) throw new ArgumentNullException();
101      if (InvokeRequired)
102        Invoke(new Action<IEnumerable<Type>, bool, bool, bool, Func<Type, bool>>(Configure), baseTypes, showNotInstantiableTypes, showGenericTypes, assignableToAllTypes, typeCondition);
103      else {
104        this.baseTypes = baseTypes;
105        this.showNotInstantiableTypes = showNotInstantiableTypes;
106        this.showGenericTypes = showGenericTypes;
107        bool selectedTypeFound = false;
108
109        typeParametersSplitContainer.Panel2Collapsed = !showGenericTypes;
110
111        TreeNode selectedNode = typesTreeView.SelectedNode;
112        typesTreeView.Nodes.Clear();
113        treeNodes.Clear();
114
115        imageList.Images.Clear();
116        imageList.Images.Add(HeuristicLab.Common.Resources.VSImageLibrary.Class);      // default icon
117        imageList.Images.Add(HeuristicLab.Common.Resources.VSImageLibrary.Namespace);  // plugins
118        imageList.Images.Add(HeuristicLab.Common.Resources.VSImageLibrary.Interface);  // interfaces
119        imageList.Images.Add(HeuristicLab.Common.Resources.VSImageLibrary.Template);   // generic types
120        // additional dictionary for image indexes as imageList.ContainsKey and imageList.IndexOfKey are very slow!
121        var imageNames = new Dictionary<string, int>();
122
123        var plugins = from p in ApplicationManager.Manager.Plugins
124                      orderby p.Name, p.Version ascending
125                      select p;
126        foreach (IPluginDescription plugin in plugins) {
127          TreeNode pluginNode = new TreeNode();
128          pluginNode.Text = string.Format("{0} {1}.{2}", plugin.Name, plugin.Version.Major, plugin.Version.Minor);
129          pluginNode.ImageIndex = 1;
130          pluginNode.SelectedImageIndex = pluginNode.ImageIndex;
131          pluginNode.Tag = plugin;
132
133          var types = from t in ApplicationManager.Manager.GetTypes(BaseTypes, plugin, !ShowNotInstantiableTypes, ShowGenericTypes, assignableToAllTypes)
134                      where typeCondition(t)
135                      orderby t.Name ascending
136                      select t;
137          foreach (Type type in types) {
138            bool valid = (ShowNotInstantiableTypes || type.GetConstructor(Type.EmptyTypes) != null); //check for public default ctor
139            if (valid) {
140              TreeNode typeNode = new TreeNode();
141              string name = ItemAttribute.GetName(type);
142              typeNode.Text = name != null ? name : type.GetPrettyName();
143              typeNode.ImageIndex = 0;
144              if (type.IsInterface) typeNode.ImageIndex = 2;
145              else if (type.ContainsGenericParameters) typeNode.ImageIndex = 3;
146              else if (imageNames.ContainsKey(type.FullName)) typeNode.ImageIndex = imageNames[type.FullName];
147              else {
148                var image = ItemAttribute.GetImage(type);
149                if (image != null) {
150                  imageList.Images.Add(image);
151                  typeNode.ImageIndex = imageList.Images.Count - 1;
152                  imageNames.Add(type.FullName, imageList.Images.Count - 1);
153                }
154              }
155              typeNode.SelectedImageIndex = typeNode.ImageIndex;
156              typeNode.Tag = type;
157              pluginNode.Nodes.Add(typeNode);
158              if (type.Equals(selectedType)) selectedTypeFound = true;
159            }
160          }
161          if (pluginNode.Nodes.Count > 0)
162            treeNodes.Add(pluginNode);
163        }
164        if (!selectedTypeFound) SelectedType = null;
165        foreach (TreeNode node in treeNodes)
166          typesTreeView.Nodes.Add((TreeNode)node.Clone());
167        RestoreSelectedNode(selectedNode);
168        Filter(searchTextBox.Text);
169
170        UpdateTypeParameters();
171      }
172    }
173
174    public virtual void Filter(string searchString) {
175      if (InvokeRequired)
176        Invoke(new Action<string>(Filter), searchString);
177      else {
178        searchString = searchString.ToLower();
179
180        if (!searchString.Contains(currentSearchString)) {
181          typesTreeView.BeginUpdate();
182          // expand search -> restore all tree nodes
183          TreeNode selectedNode = typesTreeView.SelectedNode;
184          typesTreeView.Nodes.Clear();
185          foreach (TreeNode node in treeNodes)
186            typesTreeView.Nodes.Add((TreeNode)node.Clone());
187          RestoreSelectedNode(selectedNode);
188          typesTreeView.EndUpdate();
189        }
190
191
192        // remove nodes
193        typesTreeView.BeginUpdate();
194        int i = 0;
195        while (i < typesTreeView.Nodes.Count) {
196          int j = 0;
197          while (j < typesTreeView.Nodes[i].Nodes.Count) {
198            if (!typesTreeView.Nodes[i].Nodes[j].Text.ToLower().Contains(searchString)) {
199              if ((typesTreeView.Nodes[i].Nodes[j].Tag as Type).Equals(selectedType))
200                SelectedType = null;
201              typesTreeView.Nodes[i].Nodes[j].Remove();
202            } else
203              j++;
204          }
205          if (typesTreeView.Nodes[i].Nodes.Count == 0)
206            typesTreeView.Nodes[i].Remove();
207          else
208            i++;
209        }
210        typesTreeView.EndUpdate();
211        currentSearchString = searchString;
212
213        // if there is just one type node left, select by default
214        if (typesTreeView.Nodes.Count == 1) {
215          if (typesTreeView.Nodes[0].Nodes.Count == 1) {
216            typesTreeView.SelectedNode = typesTreeView.Nodes[0].Nodes[0];
217          }
218        }
219
220        if (typesTreeView.Nodes.Count == 0) {
221          SelectedType = null;
222          typesTreeView.Enabled = false;
223        } else {
224          SetTreeNodeVisibility();
225          typesTreeView.Enabled = true;
226        }
227        UpdateDescription();
228      }
229    }
230
231    public virtual object CreateInstanceOfSelectedType(params object[] args) {
232      if (SelectedType == null)
233        throw new InvalidOperationException("No type selected.");
234      else
235        return Activator.CreateInstance(SelectedType, args);
236    }
237
238    protected virtual void UpdateTypeParameters() {
239      typeParametersListView.Items.Clear();
240      if ((SelectedType == null) || !SelectedType.ContainsGenericParameters) {
241        typeParametersGroupBox.Enabled = false;
242        typeParametersSplitContainer.Panel2Collapsed = true;
243      } else {
244        typeParametersGroupBox.Enabled = true;
245        typeParametersSplitContainer.Panel2Collapsed = false;
246        setTypeParameterButton.Enabled = false;
247
248        foreach (Type param in SelectedType.GetGenericArguments()) {
249          if (param.IsGenericParameter) {
250            ListViewItem item = new ListViewItem();
251            item.Text = param.Name;
252
253            item.ToolTipText = "Constraints:";
254            Type[] constraints = param.GetGenericParameterConstraints();
255            if (constraints.Length == 0) {
256              item.ToolTipText += " none";
257            } else {
258              foreach (Type constraint in constraints)
259                item.ToolTipText += " " + constraint.GetPrettyName();
260            }
261
262            item.Tag = param;
263            typeParametersListView.Items.Add(item);
264          }
265        }
266        typeParametersListView.Columns[0].AutoResize(ColumnHeaderAutoResizeStyle.ColumnContent);
267      }
268    }
269
270    protected virtual void SetTypeParameter() {
271      if (typeSelectorDialog == null) {
272        typeSelectorDialog = new TypeSelectorDialog();
273        typeSelectorDialog.Caption = "Select Type of Generic Type Parameter";
274      }
275      Type param = typeParametersListView.SelectedItems[0].Tag as Type;
276      Type[] constraints = param.GetGenericParameterConstraints();
277      bool showNotInstantiableTypes = !param.GenericParameterAttributes.HasFlag(GenericParameterAttributes.DefaultConstructorConstraint);
278      typeSelectorDialog.TypeSelector.Configure(constraints, showNotInstantiableTypes, true, true);
279
280      if (typeSelectorDialog.ShowDialog(this) == DialogResult.OK) {
281        Type selected = typeSelectorDialog.TypeSelector.SelectedType;
282        Type[] parameters = SelectedType.GetGenericArguments();
283        parameters[param.GenericParameterPosition] = selected;
284        SelectedType = SelectedType.GetGenericTypeDefinition().MakeGenericType(parameters);
285
286        typeParametersListView.SelectedItems[0].Text = param.Name + ": " + selected.GetPrettyName();
287        typeParametersListView.Columns[0].AutoResize(ColumnHeaderAutoResizeStyle.ColumnContent);
288      }
289    }
290
291    protected virtual void UpdateDescription() {
292      descriptionTextBox.Text = string.Empty;
293
294      if (typesTreeView.SelectedNode != null) {
295        IPluginDescription plugin = typesTreeView.SelectedNode.Tag as IPluginDescription;
296        if (plugin != null) {
297          StringBuilder sb = new StringBuilder();
298          sb.Append("Plugin: ").Append(plugin.Name).Append(Environment.NewLine);
299          sb.Append("Version: ").Append(plugin.Version.ToString()).Append(Environment.NewLine);
300          descriptionTextBox.Text = sb.ToString();
301        }
302        Type type = typesTreeView.SelectedNode.Tag as Type;
303        if (type != null) {
304          string description = ItemAttribute.GetDescription(type);
305          if (description != null)
306            descriptionTextBox.Text = description;
307        }
308      } else if (typesTreeView.Nodes.Count == 0) {
309        descriptionTextBox.Text = "No types found";
310      }
311    }
312
313    #region Events
314    public event EventHandler SelectedTypeChanged;
315    protected virtual void OnSelectedTypeChanged() {
316      if (SelectedTypeChanged != null)
317        SelectedTypeChanged(this, EventArgs.Empty);
318    }
319    #endregion
320
321    #region Control Events
322    protected virtual void searchTextBox_TextChanged(object sender, System.EventArgs e) {
323      Filter(searchTextBox.Text);
324    }
325
326    protected virtual void typesTreeView_AfterSelect(object sender, TreeViewEventArgs e) {
327      if (typesTreeView.SelectedNode == null) SelectedType = null;
328      else SelectedType = typesTreeView.SelectedNode.Tag as Type;
329      UpdateTypeParameters();
330      UpdateDescription();
331    }
332    protected virtual void typesTreeView_ItemDrag(object sender, ItemDragEventArgs e) {
333      TreeNode node = (TreeNode)e.Item;
334      Type type = node.Tag as Type;
335      if ((type != null) && (!type.IsInterface) && (!type.IsAbstract) && (!type.HasElementType) && (!type.ContainsGenericParameters)) {
336        object o = Activator.CreateInstance(type);
337        DataObject data = new DataObject();
338        data.SetData(HeuristicLab.Common.Constants.DragDropDataFormat, o);
339        DoDragDrop(data, DragDropEffects.Copy);
340      }
341    }
342    protected virtual void typesTreeView_VisibleChanged(object sender, EventArgs e) {
343      if (Visible) SetTreeNodeVisibility();
344    }
345
346    protected virtual void typeParametersListView_SelectedIndexChanged(object sender, EventArgs e) {
347      setTypeParameterButton.Enabled = typeParametersListView.SelectedItems.Count == 1;
348    }
349    protected virtual void typeParametersListView_DoubleClick(object sender, EventArgs e) {
350      if (typeParametersListView.SelectedItems.Count == 1)
351        SetTypeParameter();
352    }
353
354    protected virtual void setTypeParameterButton_Click(object sender, EventArgs e) {
355      SetTypeParameter();
356    }
357    #endregion
358
359    #region Helpers
360    private void RestoreSelectedNode(TreeNode selectedNode) {
361      if (selectedNode != null) {
362        foreach (TreeNode node in typesTreeView.Nodes) {
363          if (node.Text.Equals(selectedNode.Text)) typesTreeView.SelectedNode = node;
364          foreach (TreeNode child in node.Nodes) {
365            if ((child.Text.Equals(selectedNode.Text)) && (child.Tag == selectedNode.Tag))
366              typesTreeView.SelectedNode = child;
367          }
368        }
369        if (typesTreeView.SelectedNode == null) SelectedType = null;
370      }
371    }
372    private void SetTreeNodeVisibility() {
373      TreeNode selectedNode = typesTreeView.SelectedNode;
374      if (string.IsNullOrEmpty(currentSearchString) && (typesTreeView.Nodes.Count > 1)) {
375        typesTreeView.CollapseAll();
376        if (selectedNode != null) typesTreeView.SelectedNode = selectedNode;
377      } else {
378        typesTreeView.ExpandAll();
379      }
380      if (selectedNode != null) selectedNode.EnsureVisible();
381    }
382    #endregion
383  }
384}
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