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source: branches/DataAnalysis Refactoring/HeuristicLab.Core.Views/3.3/ItemArrayView.cs @ 5796

Last change on this file since 5796 was 5796, checked in by mkommend, 14 years ago

#1418: Merged trunk changes into branch.
File size: 20.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 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.Drawing;
25using System.Linq;
26using System.Windows.Forms;
27using HeuristicLab.Collections;
28using HeuristicLab.MainForm;
29using HeuristicLab.MainForm.WindowsForms;
30using HeuristicLab.PluginInfrastructure;
31
32namespace HeuristicLab.Core.Views {
33  [View("ItemArray View")]
34  [Content(typeof(ItemArray<>), true)]
35  [Content(typeof(IItemArray<>), false)]
36  public partial class ItemArrayView<T> : ItemView where T : class, IItem {
37    protected Dictionary<T, List<ListViewItem>> itemListViewItemMapping;
38    protected TypeSelectorDialog typeSelectorDialog;
39    protected bool validDragOperation;
40
41    public new IItemArray<T> Content {
42      get { return (IItemArray<T>)base.Content; }
43      set { base.Content = value; }
44    }
45
46    public ListView ItemsListView {
47      get { return itemsListView; }
48    }
49
50    public ItemArrayView() {
51      InitializeComponent();
52      itemListViewItemMapping = new Dictionary<T, List<ListViewItem>>();
53    }
54
55    protected override void Dispose(bool disposing) {
56      if (disposing) {
57        if (typeSelectorDialog != null) typeSelectorDialog.Dispose();
58        if (components != null) components.Dispose();
59      }
60      base.Dispose(disposing);
61    }
62
63    protected override void DeregisterContentEvents() {
64      Content.ItemsReplaced -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_ItemsReplaced);
65      Content.ItemsMoved -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_ItemsMoved);
66      Content.CollectionReset -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_CollectionReset);
67      foreach (T item in itemListViewItemMapping.Keys) {
68        DeregisterItemEvents(item);
69      }
70      base.DeregisterContentEvents();
71    }
72    protected override void RegisterContentEvents() {
73      base.RegisterContentEvents();
74      Content.ItemsReplaced += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_ItemsReplaced);
75      Content.ItemsMoved += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_ItemsMoved);
76      Content.CollectionReset += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_CollectionReset);
77    }
78    protected virtual void DeregisterItemEvents(T item) {
79      item.ItemImageChanged -= new EventHandler(Item_ItemImageChanged);
80      item.ToStringChanged -= new EventHandler(Item_ToStringChanged);
81    }
82    protected virtual void RegisterItemEvents(T item) {
83      item.ItemImageChanged += new EventHandler(Item_ItemImageChanged);
84      item.ToStringChanged += new EventHandler(Item_ToStringChanged);
85    }
86
87    protected override void OnContentChanged() {
88      base.OnContentChanged();
89
90      int selectedIndex = -1;
91      if (itemsListView.SelectedItems.Count == 1) selectedIndex = itemsListView.SelectedIndices[0];
92
93      itemsListView.Items.Clear();
94      itemListViewItemMapping.Clear();
95      RebuildImageList();
96      viewHost.Content = null;
97      if (Content != null) {
98        Caption += " (" + Content.GetType().Name + ")";
99        foreach (T item in Content)
100          AddListViewItem(CreateListViewItem(item));
101        AdjustListViewColumnSizes();
102        if ((selectedIndex != -1) && (selectedIndex < itemsListView.Items.Count))
103          itemsListView.Items[selectedIndex].Selected = true;
104      }
105    }
106
107    protected override void SetEnabledStateOfControls() {
108      base.SetEnabledStateOfControls();
109      if (Content == null) {
110        addButton.Enabled = false;
111        moveUpButton.Enabled = false;
112        moveDownButton.Enabled = false;
113        removeButton.Enabled = false;
114        itemsListView.Enabled = false;
115        detailsGroupBox.Enabled = false;
116      } else {
117        addButton.Enabled = itemsListView.SelectedItems.Count > 0 &&
118                            !Content.IsReadOnly && !ReadOnly;
119        moveUpButton.Enabled = itemsListView.SelectedItems.Count == 1 &&
120                               itemsListView.SelectedIndices[0] != 0 &&
121                               !Content.IsReadOnly && !ReadOnly;
122        moveDownButton.Enabled = itemsListView.SelectedItems.Count == 1 &&
123                                 itemsListView.SelectedIndices[0] != itemsListView.Items.Count - 1 &&
124                                 !Content.IsReadOnly && !ReadOnly;
125        removeButton.Enabled = itemsListView.SelectedItems.Count > 0 &&
126                               !Content.IsReadOnly && !ReadOnly;
127        itemsListView.Enabled = true;
128        detailsGroupBox.Enabled = itemsListView.SelectedItems.Count == 1;
129      }
130    }
131
132    protected virtual T CreateItem() {
133      if (typeSelectorDialog == null) {
134        typeSelectorDialog = new TypeSelectorDialog();
135        typeSelectorDialog.Caption = "Select Item";
136        typeSelectorDialog.TypeSelector.Caption = "Available Items";
137        typeSelectorDialog.TypeSelector.Configure(typeof(T), false, true);
138      }
139
140      if (typeSelectorDialog.ShowDialog(this) == DialogResult.OK) {
141        try {
142          return (T)typeSelectorDialog.TypeSelector.CreateInstanceOfSelectedType();
143        }
144        catch (Exception ex) {
145          ErrorHandling.ShowErrorDialog(this, ex);
146        }
147      }
148      return null;
149    }
150    protected virtual ListViewItem CreateListViewItem(T item) {
151      ListViewItem listViewItem = new ListViewItem();
152      if (item == null) {
153        listViewItem.Text = "null";
154        itemsListView.SmallImageList.Images.Add(HeuristicLab.Common.Resources.VSImageLibrary.Nothing);
155        listViewItem.ImageIndex = itemsListView.SmallImageList.Images.Count - 1;
156      } else {
157        listViewItem.Text = item.ToString();
158        listViewItem.ToolTipText = item.ItemName + ": " + item.ItemDescription;
159        itemsListView.SmallImageList.Images.Add(item.ItemImage);
160        listViewItem.ImageIndex = itemsListView.SmallImageList.Images.Count - 1;
161        listViewItem.Tag = item;
162      }
163      return listViewItem;
164    }
165    protected virtual void AddListViewItem(ListViewItem listViewItem) {
166      if (listViewItem == null) throw new ArgumentNullException();
167      T item = (listViewItem.Tag as T);
168      itemsListView.Items.Add(listViewItem);
169      if (item != null) {
170        if (!itemListViewItemMapping.ContainsKey(item)) {
171          RegisterItemEvents(item);
172          itemListViewItemMapping.Add(item, new List<ListViewItem>());
173        }
174        itemListViewItemMapping[item].Add(listViewItem);
175      }
176    }
177    protected virtual void InsertListViewItem(int index, ListViewItem listViewItem) {
178      if (listViewItem == null) throw new ArgumentNullException();
179      T item = (listViewItem.Tag as T);
180      itemsListView.Items.Insert(index, listViewItem);
181      if (item != null) {
182        if (!itemListViewItemMapping.ContainsKey(item)) {
183          RegisterItemEvents(item);
184          itemListViewItemMapping.Add(item, new List<ListViewItem>());
185        }
186        itemListViewItemMapping[item].Add(listViewItem);
187      }
188    }
189    protected virtual void RemoveListViewItem(ListViewItem listViewItem) {
190      if (listViewItem == null) throw new ArgumentNullException();
191      T item = (listViewItem.Tag as T);
192      if (item != null) {
193        itemListViewItemMapping[item].Remove(listViewItem);
194        if (itemListViewItemMapping[item].Count == 0) {
195          itemListViewItemMapping.Remove(item);
196          DeregisterItemEvents(item);
197        }
198      }
199      listViewItem.Remove();
200    }
201    protected virtual void UpdateListViewItemImage(ListViewItem listViewItem) {
202      if (listViewItem == null) throw new ArgumentNullException();
203      T item = listViewItem.Tag as T;
204      int i = listViewItem.ImageIndex;
205      listViewItem.ImageList.Images[i] = item == null ? HeuristicLab.Common.Resources.VSImageLibrary.Nothing : item.ItemImage;
206      listViewItem.ImageIndex = -1;
207      listViewItem.ImageIndex = i;
208    }
209    protected virtual void UpdateListViewItemText(ListViewItem listViewItem) {
210      if (listViewItem == null) throw new ArgumentNullException();
211      T item = listViewItem.Tag as T;
212      listViewItem.Text = item == null ? "null" : item.ToString();
213      listViewItem.ToolTipText = item == null ? string.Empty : item.ItemName + ": " + item.ItemDescription;
214    }
215    protected virtual IEnumerable<ListViewItem> GetListViewItemsForItem(T item) {
216      if (item == null) {
217        List<ListViewItem> listViewItems = new List<ListViewItem>();
218        foreach (ListViewItem listViewItem in itemsListView.Items) {
219          if (listViewItem.Tag == null) listViewItems.Add(listViewItem);
220        }
221        return listViewItems;
222      } else {
223        List<ListViewItem> listViewItems = null;
224        itemListViewItemMapping.TryGetValue(item, out listViewItems);
225        return listViewItems == null ? Enumerable.Empty<ListViewItem>() : listViewItems;
226      }
227    }
228
229    #region ListView Events
230    protected virtual void itemsListView_SelectedIndexChanged(object sender, EventArgs e) {
231      addButton.Enabled = itemsListView.SelectedItems.Count > 0 && (Content != null) && !Content.IsReadOnly && !ReadOnly;
232      moveUpButton.Enabled = itemsListView.SelectedItems.Count == 1 &&
233                             itemsListView.SelectedIndices[0] != 0 &&
234                             (Content != null) && !Content.IsReadOnly && !ReadOnly;
235      moveDownButton.Enabled = itemsListView.SelectedItems.Count == 1 &&
236                               itemsListView.SelectedIndices[0] != itemsListView.Items.Count - 1 &&
237                               (Content != null) && !Content.IsReadOnly && !ReadOnly;
238      removeButton.Enabled = itemsListView.SelectedItems.Count > 0 && (Content != null) && !Content.IsReadOnly && !ReadOnly;
239      AdjustListViewColumnSizes();
240
241      if (showDetailsCheckBox.Checked) {
242        if (itemsListView.SelectedItems.Count == 1) {
243          T item = itemsListView.SelectedItems[0].Tag as T;
244          detailsGroupBox.Enabled = true;
245          viewHost.Content = item;
246        } else {
247          viewHost.Content = null;
248          detailsGroupBox.Enabled = false;
249        }
250      }
251    }
252
253    protected virtual void itemsListView_KeyDown(object sender, KeyEventArgs e) {
254      if (e.KeyCode == Keys.Delete) {
255        if ((itemsListView.SelectedItems.Count > 0) && !Content.IsReadOnly && !ReadOnly) {
256          foreach (ListViewItem item in itemsListView.SelectedItems)
257            Content[item.Index] = null;
258        }
259      }
260    }
261
262    protected virtual void itemsListView_DoubleClick(object sender, EventArgs e) {
263      if (itemsListView.SelectedItems.Count == 1) {
264        T item = itemsListView.SelectedItems[0].Tag as T;
265        if (item != null) {
266          IContentView view = MainFormManager.MainForm.ShowContent(item);
267          if (view != null) {
268            view.ReadOnly = ReadOnly;
269            view.Locked = Locked;
270          }
271        }
272      }
273    }
274
275    protected virtual void itemsListView_ItemDrag(object sender, ItemDragEventArgs e) {
276      if (!Locked) {
277        List<T> items = new List<T>();
278        foreach (ListViewItem listViewItem in itemsListView.SelectedItems) {
279          T item = listViewItem.Tag as T;
280          if (item != null) items.Add(item);
281        }
282
283        if (items.Count > 0) {
284          DataObject data = new DataObject();
285          if (items.Count == 1) data.SetData("HeuristicLab", items[0]);
286          else data.SetData("HeuristicLab", items);
287          if (Content.IsReadOnly || ReadOnly) {
288            DoDragDrop(data, DragDropEffects.Copy | DragDropEffects.Link);
289          } else {
290            DragDropEffects result = DoDragDrop(data, DragDropEffects.Copy | DragDropEffects.Link | DragDropEffects.Move);
291            if ((result & DragDropEffects.Move) == DragDropEffects.Move) {
292              foreach (ListViewItem listViewItem in itemsListView.SelectedItems.Cast<ListViewItem>().ToArray())
293                Content[listViewItem.Index] = null;
294            }
295          }
296        }
297      }
298    }
299    protected virtual void itemsListView_DragEnter(object sender, DragEventArgs e) {
300      validDragOperation = !Content.IsReadOnly && !ReadOnly && e.Data.GetData("HeuristicLab") is T;
301    }
302    protected virtual void itemsListView_DragOver(object sender, DragEventArgs e) {
303      e.Effect = DragDropEffects.None;
304      if (validDragOperation) {
305        Point p = itemsListView.PointToClient(new Point(e.X, e.Y));
306        ListViewItem listViewItem = itemsListView.GetItemAt(p.X, p.Y);
307        if (listViewItem != null) {
308          if ((e.KeyState & 32) == 32) e.Effect = DragDropEffects.Link;  // ALT key
309          else if ((e.KeyState & 4) == 4) e.Effect = DragDropEffects.Move;  // SHIFT key
310          else if (e.AllowedEffect.HasFlag(DragDropEffects.Copy)) e.Effect = DragDropEffects.Copy;
311          else if (e.AllowedEffect.HasFlag(DragDropEffects.Move)) e.Effect = DragDropEffects.Move;
312          else if (e.AllowedEffect.HasFlag(DragDropEffects.Link)) e.Effect = DragDropEffects.Link;
313        }
314      }
315    }
316    protected virtual void itemsListView_DragDrop(object sender, DragEventArgs e) {
317      if (e.Effect != DragDropEffects.None) {
318        Point p = itemsListView.PointToClient(new Point(e.X, e.Y));
319        ListViewItem listViewItem = itemsListView.GetItemAt(p.X, p.Y);
320        T item = e.Data.GetData("HeuristicLab") as T;
321        Content[listViewItem.Index] = e.Effect.HasFlag(DragDropEffects.Copy) ? (T)item.Clone() : item;
322      }
323    }
324    #endregion
325
326    #region Button Events
327    protected virtual void addButton_Click(object sender, EventArgs e) {
328      if (itemsListView.SelectedItems.Count > 0) {
329        T item = CreateItem();
330        if (item != null) {
331          foreach (ListViewItem listViewItem in itemsListView.SelectedItems)
332            Content[listViewItem.Index] = item;
333        }
334      }
335    }
336    protected virtual void moveUpButton_Click(object sender, EventArgs e) {
337      if (itemsListView.SelectedItems.Count == 1) {
338        int index = itemsListView.SelectedIndices[0];
339        T item = Content[index - 1];
340        Content[index - 1] = Content[index];
341        itemsListView.Items[index].Selected = false;
342        itemsListView.Items[index - 1].Selected = true;
343        Content[index] = item;
344      }
345    }
346    protected virtual void moveDownButton_Click(object sender, EventArgs e) {
347      if (itemsListView.SelectedItems.Count == 1) {
348        int index = itemsListView.SelectedIndices[0];
349        T item = Content[index + 1];
350        Content[index + 1] = Content[index];
351        itemsListView.Items[index].Selected = false;
352        itemsListView.Items[index + 1].Selected = true;
353        Content[index] = item;
354      }
355    }
356    protected virtual void removeButton_Click(object sender, EventArgs e) {
357      if (itemsListView.SelectedItems.Count > 0) {
358        foreach (ListViewItem item in itemsListView.SelectedItems)
359          Content[item.Index] = null;
360      }
361    }
362    #endregion
363
364    #region CheckBox Events
365    protected virtual void showDetailsCheckBox_CheckedChanged(object sender, EventArgs e) {
366      if (showDetailsCheckBox.Checked) {
367        splitContainer.Panel2Collapsed = false;
368        detailsGroupBox.Enabled = itemsListView.SelectedItems.Count == 1;
369        viewHost.Content = itemsListView.SelectedItems.Count == 1 ? (T)itemsListView.SelectedItems[0].Tag : null;
370      } else {
371        splitContainer.Panel2Collapsed = true;
372        viewHost.Content = null;
373      }
374    }
375    #endregion
376
377    #region Content Events
378    protected virtual void Content_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
379      if (InvokeRequired)
380        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_ItemsReplaced), sender, e);
381      else {
382        int[] selected = new int[itemsListView.SelectedIndices.Count];
383        itemsListView.SelectedIndices.CopyTo(selected, 0);
384
385        List<ListViewItem> listViewItems = new List<ListViewItem>();
386        foreach (IndexedItem<T> item in e.OldItems)
387          listViewItems.Add(itemsListView.Items[item.Index]);
388        foreach (ListViewItem listViewItem in listViewItems)
389          RemoveListViewItem(listViewItem);
390        RebuildImageList();
391
392        foreach (IndexedItem<T> item in e.Items)
393          InsertListViewItem(item.Index, CreateListViewItem(item.Value));
394        AdjustListViewColumnSizes();
395
396        for (int i = 0; i < selected.Length; i++)
397          itemsListView.Items[selected[i]].Selected = true;
398      }
399    }
400    protected virtual void Content_ItemsMoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
401      if (InvokeRequired)
402        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_ItemsMoved), sender, e);
403      else {
404        foreach (IndexedItem<T> item in e.Items) {
405          ListViewItem listViewItem = itemsListView.Items[item.Index];
406          listViewItem.Tag = item.Value;
407          UpdateListViewItemImage(listViewItem);
408          UpdateListViewItemText(listViewItem);
409        }
410      }
411    }
412    protected virtual void Content_CollectionReset(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
413      if (InvokeRequired)
414        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_CollectionReset), sender, e);
415      else {
416        List<ListViewItem> listViewItems = new List<ListViewItem>();
417        foreach (IndexedItem<T> item in e.OldItems)
418          listViewItems.Add(itemsListView.Items[item.Index]);
419        foreach (ListViewItem listViewItem in listViewItems)
420          RemoveListViewItem(listViewItem);
421        RebuildImageList();
422
423        foreach (IndexedItem<T> item in e.Items)
424          InsertListViewItem(item.Index, CreateListViewItem(item.Value));
425        AdjustListViewColumnSizes();
426      }
427    }
428    #endregion
429
430    #region Item Events
431    protected virtual void Item_ItemImageChanged(object sender, EventArgs e) {
432      if (InvokeRequired)
433        Invoke(new EventHandler(Item_ItemImageChanged), sender, e);
434      else {
435        T item = (T)sender;
436        foreach (ListViewItem listViewItem in GetListViewItemsForItem(item))
437          UpdateListViewItemImage(listViewItem);
438      }
439    }
440    protected virtual void Item_ToStringChanged(object sender, EventArgs e) {
441      if (InvokeRequired)
442        Invoke(new EventHandler(Item_ToStringChanged), sender, e);
443      else {
444        T item = (T)sender;
445        foreach (ListViewItem listViewItem in GetListViewItemsForItem(item))
446          UpdateListViewItemText(listViewItem);
447      }
448    }
449    #endregion
450
451    #region Helpers
452    protected virtual void AdjustListViewColumnSizes() {
453      if (itemsListView.Items.Count > 0) {
454        for (int i = 0; i < itemsListView.Columns.Count; i++)
455          itemsListView.Columns[i].AutoResize(ColumnHeaderAutoResizeStyle.ColumnContent);
456      }
457    }
458    protected virtual void RebuildImageList() {
459      itemsListView.SmallImageList.Images.Clear();
460      foreach (ListViewItem listViewItem in itemsListView.Items) {
461        T item = listViewItem.Tag as T;
462        itemsListView.SmallImageList.Images.Add(item == null ? HeuristicLab.Common.Resources.VSImageLibrary.Nothing : item.ItemImage);
463        listViewItem.ImageIndex = itemsListView.SmallImageList.Images.Count - 1;
464      }
465    }
466    #endregion
467  }
468}
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