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source: trunk/sources/HeuristicLab.Core.Views/3.3/ItemCollectionView.cs @ 4047

Last change on this file since 4047 was 3904, checked in by mkommend, 15 years ago

Added SetEnabledStateOfControls as protected virtual method in !View. Therefore the overloading of OnReadOnlyChanged and OnLockedChanged got obsolete in most views, because the method got called in the !View respectively ContentView. (ticket #1021)
File size: 13.1 KB
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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.Collections.Generic;
24using System.Linq;
25using System.Windows.Forms;
26using HeuristicLab.Collections;
27using HeuristicLab.MainForm;
28using HeuristicLab.MainForm.WindowsForms;
29using HeuristicLab.PluginInfrastructure;
30
31namespace HeuristicLab.Core.Views {
32  [View("ItemCollection View")]
33  [Content(typeof(ItemCollection<>), true)]
34  [Content(typeof(IItemCollection<>), false)]
35  public partial class ItemCollectionView<T> : ItemView where T : class, IItem {
36    protected TypeSelectorDialog typeSelectorDialog;
37
38    public new IItemCollection<T> Content {
39      get { return (IItemCollection<T>)base.Content; }
40      set { base.Content = value; }
41    }
42
43    public ListView ItemsListView {
44      get { return itemsListView; }
45    }
46
47    public ItemCollectionView() {
48      InitializeComponent();
49    }
50
51    protected override void DeregisterContentEvents() {
52      Content.ItemsAdded -= new CollectionItemsChangedEventHandler<T>(Content_ItemsAdded);
53      Content.ItemsRemoved -= new CollectionItemsChangedEventHandler<T>(Content_ItemsRemoved);
54      Content.CollectionReset -= new CollectionItemsChangedEventHandler<T>(Content_CollectionReset);
55      base.DeregisterContentEvents();
56    }
57    protected override void RegisterContentEvents() {
58      base.RegisterContentEvents();
59      Content.ItemsAdded += new CollectionItemsChangedEventHandler<T>(Content_ItemsAdded);
60      Content.ItemsRemoved += new CollectionItemsChangedEventHandler<T>(Content_ItemsRemoved);
61      Content.CollectionReset += new CollectionItemsChangedEventHandler<T>(Content_CollectionReset);
62    }
63
64    protected override void OnContentChanged() {
65      base.OnContentChanged();
66      while (itemsListView.Items.Count > 0) RemoveListViewItem(itemsListView.Items[0]);
67      viewHost.Content = null;
68      if (Content != null) {
69        Caption += " (" + Content.GetType().Name + ")";
70        foreach (T item in Content)
71          AddListViewItem(CreateListViewItem(item));
72        SortItemsListView(SortOrder.Ascending);
73      }
74    }
75
76    protected override void SetEnabledStateOfControls() {
77      base.SetEnabledStateOfControls();
78      if (Content == null) {
79        addButton.Enabled = false;
80        sortAscendingButton.Enabled = false;
81        sortDescendingButton.Enabled = false;
82        removeButton.Enabled = false;
83        itemsListView.Enabled = false;
84        detailsGroupBox.Enabled = false;
85      } else {
86        addButton.Enabled = !Content.IsReadOnly && !ReadOnly;
87        sortAscendingButton.Enabled = itemsListView.Items.Count > 1;
88        sortDescendingButton.Enabled = itemsListView.Items.Count > 1;
89        removeButton.Enabled = !Content.IsReadOnly && !ReadOnly && itemsListView.SelectedItems.Count > 0;
90        itemsListView.Enabled = true;
91        detailsGroupBox.Enabled = true;
92      }
93    }
94
95    protected virtual T CreateItem() {
96      if (typeSelectorDialog == null) {
97        typeSelectorDialog = new TypeSelectorDialog();
98        typeSelectorDialog.Caption = "Select Item";
99        typeSelectorDialog.TypeSelector.Caption = "Available Items";
100        typeSelectorDialog.TypeSelector.Configure(typeof(T), false, true);
101      }
102
103      if (typeSelectorDialog.ShowDialog(this) == DialogResult.OK) {
104        try {
105          return (T)typeSelectorDialog.TypeSelector.CreateInstanceOfSelectedType();
106        }
107        catch (Exception ex) {
108          ErrorHandling.ShowErrorDialog(this, ex);
109        }
110      }
111      return null;
112    }
113    protected virtual ListViewItem CreateListViewItem(T item) {
114      ListViewItem listViewItem = new ListViewItem();
115      listViewItem.Text = item.ToString();
116      listViewItem.ToolTipText = item.ItemName + ": " + item.ItemDescription;
117      listViewItem.Tag = item;
118      itemsListView.SmallImageList.Images.Add(item.ItemImage);
119      listViewItem.ImageIndex = itemsListView.SmallImageList.Images.Count - 1;
120      return listViewItem;
121    }
122    protected virtual void AddListViewItem(ListViewItem listViewItem) {
123      itemsListView.Items.Add(listViewItem);
124      ((T)listViewItem.Tag).ItemImageChanged += new EventHandler(Item_ItemImageChanged);
125      ((T)listViewItem.Tag).ToStringChanged += new EventHandler(Item_ToStringChanged);
126      AdjustListViewColumnSizes();
127      sortAscendingButton.Enabled = itemsListView.Items.Count > 1;
128      sortDescendingButton.Enabled = itemsListView.Items.Count > 1;
129    }
130    protected virtual void RemoveListViewItem(ListViewItem listViewItem) {
131      ((T)listViewItem.Tag).ItemImageChanged -= new EventHandler(Item_ItemImageChanged);
132      ((T)listViewItem.Tag).ToStringChanged -= new EventHandler(Item_ToStringChanged);
133      listViewItem.Remove();
134      foreach (ListViewItem other in itemsListView.Items)
135        if (other.ImageIndex > listViewItem.ImageIndex) other.ImageIndex--;
136      itemsListView.SmallImageList.Images.RemoveAt(listViewItem.ImageIndex);
137      sortAscendingButton.Enabled = itemsListView.Items.Count > 1;
138      sortDescendingButton.Enabled = itemsListView.Items.Count > 1;
139    }
140    protected virtual void UpdateListViewItemImage(ListViewItem listViewItem) {
141      int i = listViewItem.ImageIndex;
142      listViewItem.ImageList.Images[i] = ((T)listViewItem.Tag).ItemImage;
143      listViewItem.ImageIndex = -1;
144      listViewItem.ImageIndex = i;
145    }
146    protected virtual void UpdateListViewItemText(ListViewItem listViewItem) {
147      if (!listViewItem.Text.Equals(listViewItem.Tag.ToString()))
148        listViewItem.Text = listViewItem.Tag.ToString();
149    }
150    protected virtual IEnumerable<ListViewItem> GetListViewItemsForItem(T item) {
151      foreach (ListViewItem listViewItem in itemsListView.Items) {
152        if (((T)listViewItem.Tag) == item)
153          yield return listViewItem;
154      }
155    }
156
157    #region ListView Events
158    protected virtual void itemsListView_SelectedIndexChanged(object sender, EventArgs e) {
159      removeButton.Enabled = (Content != null) && !Content.IsReadOnly && !ReadOnly && itemsListView.SelectedItems.Count > 0;
160      AdjustListViewColumnSizes();
161      if (itemsListView.SelectedItems.Count == 1) {
162        T item = (T)itemsListView.SelectedItems[0].Tag;
163        detailsGroupBox.Enabled = true;
164        viewHost.Content = item;
165      } else {
166        viewHost.Content = null;
167        detailsGroupBox.Enabled = false;
168      }
169    }
170    protected virtual void itemsListView_KeyDown(object sender, KeyEventArgs e) {
171      if (e.KeyCode == Keys.Delete) {
172        if ((itemsListView.SelectedItems.Count > 0) && !Content.IsReadOnly && !ReadOnly) {
173          foreach (ListViewItem item in itemsListView.SelectedItems)
174            Content.Remove((T)item.Tag);
175        }
176      }
177    }
178    protected virtual void itemsListView_DoubleClick(object sender, EventArgs e) {
179      if (itemsListView.SelectedItems.Count == 1) {
180        T item = (T)itemsListView.SelectedItems[0].Tag;
181        IContentView view = MainFormManager.MainForm.ShowContent(item);
182        if (view != null) {
183          view.ReadOnly = ReadOnly;
184          view.Locked = Locked;
185        }
186      }
187    }
188    protected virtual void itemsListView_ItemDrag(object sender, ItemDragEventArgs e) {
189      if (!Locked) {
190        ListViewItem listViewItem = (ListViewItem)e.Item;
191        T item = (T)listViewItem.Tag;
192        DataObject data = new DataObject();
193        data.SetData("Type", item.GetType());
194        data.SetData("Value", item);
195        if (Content.IsReadOnly || ReadOnly) {
196          DoDragDrop(data, DragDropEffects.Copy | DragDropEffects.Link);
197        } else {
198          DragDropEffects result = DoDragDrop(data, DragDropEffects.Copy | DragDropEffects.Link | DragDropEffects.Move);
199          if ((result & DragDropEffects.Move) == DragDropEffects.Move)
200            Content.Remove(item);
201        }
202      }
203    }
204    protected virtual void itemsListView_DragEnterOver(object sender, DragEventArgs e) {
205      e.Effect = DragDropEffects.None;
206      Type type = e.Data.GetData("Type") as Type;
207      if (!Content.IsReadOnly && !ReadOnly && (type != null) && (typeof(T).IsAssignableFrom(type))) {
208        if ((e.KeyState & 32) == 32) e.Effect = DragDropEffects.Link;  // ALT key
209        else if ((e.KeyState & 4) == 4) e.Effect = DragDropEffects.Move;  // SHIFT key
210        else if ((e.AllowedEffect & DragDropEffects.Copy) == DragDropEffects.Copy) e.Effect = DragDropEffects.Copy;
211        else if ((e.AllowedEffect & DragDropEffects.Move) == DragDropEffects.Move) e.Effect = DragDropEffects.Move;
212        else if ((e.AllowedEffect & DragDropEffects.Link) == DragDropEffects.Link) e.Effect = DragDropEffects.Link;
213      }
214    }
215    protected virtual void itemsListView_DragDrop(object sender, DragEventArgs e) {
216      if (e.Effect != DragDropEffects.None) {
217        T item = e.Data.GetData("Value") as T;
218        if ((e.Effect & DragDropEffects.Copy) == DragDropEffects.Copy) item = (T)item.Clone();
219        Content.Add(item);
220      }
221    }
222    #endregion
223
224    #region Button Events
225    protected virtual void addButton_Click(object sender, EventArgs e) {
226      T item = CreateItem();
227      if (item != null)
228        Content.Add(item);
229    }
230    protected virtual void sortAscendingButton_Click(object sender, EventArgs e) {
231      SortItemsListView(SortOrder.Ascending);
232    }
233    protected virtual void sortDescendingButton_Click(object sender, EventArgs e) {
234      SortItemsListView(SortOrder.Descending);
235    }
236    protected virtual void removeButton_Click(object sender, EventArgs e) {
237      if (itemsListView.SelectedItems.Count > 0) {
238        foreach (ListViewItem item in itemsListView.SelectedItems)
239          Content.Remove((T)item.Tag);
240        itemsListView.SelectedItems.Clear();
241      }
242    }
243    #endregion
244
245    #region Content Events
246    protected virtual void Content_ItemsAdded(object sender, CollectionItemsChangedEventArgs<T> e) {
247      if (InvokeRequired)
248        Invoke(new CollectionItemsChangedEventHandler<T>(Content_ItemsAdded), sender, e);
249      else
250        foreach (T item in e.Items)
251          AddListViewItem(CreateListViewItem(item));
252    }
253    protected virtual void Content_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<T> e) {
254      if (InvokeRequired)
255        Invoke(new CollectionItemsChangedEventHandler<T>(Content_ItemsRemoved), sender, e);
256      else {
257        foreach (T item in e.Items) {
258          foreach (ListViewItem listViewItem in GetListViewItemsForItem(item)) {
259            RemoveListViewItem(listViewItem);
260            break;
261          }
262        }
263      }
264    }
265    protected virtual void Content_CollectionReset(object sender, CollectionItemsChangedEventArgs<T> e) {
266      if (InvokeRequired)
267        Invoke(new CollectionItemsChangedEventHandler<T>(Content_CollectionReset), sender, e);
268      else {
269        foreach (T item in e.OldItems) {
270          foreach (ListViewItem listViewItem in GetListViewItemsForItem(item)) {
271            RemoveListViewItem(listViewItem);
272            break;
273          }
274        }
275        foreach (T item in e.Items)
276          AddListViewItem(CreateListViewItem(item));
277      }
278    }
279    #endregion
280
281    #region Item Events
282    protected virtual void Item_ItemImageChanged(object sender, EventArgs e) {
283      if (InvokeRequired)
284        Invoke(new EventHandler(Item_ItemImageChanged), sender, e);
285      else {
286        T item = (T)sender;
287        foreach (ListViewItem listViewItem in GetListViewItemsForItem(item))
288          UpdateListViewItemImage(listViewItem);
289      }
290    }
291    protected virtual void Item_ToStringChanged(object sender, EventArgs e) {
292      if (InvokeRequired)
293        Invoke(new EventHandler(Item_ToStringChanged), sender, e);
294      else {
295        T item = (T)sender;
296        foreach (ListViewItem listViewItem in GetListViewItemsForItem(item))
297          UpdateListViewItemText(listViewItem);
298      }
299    }
300    #endregion
301
302    #region Helpers
303    protected virtual void SortItemsListView(SortOrder sortOrder) {
304      itemsListView.Sorting = SortOrder.None;
305      itemsListView.Sorting = sortOrder;
306      itemsListView.Sorting = SortOrder.None;
307    }
308    protected virtual void AdjustListViewColumnSizes() {
309      if (itemsListView.Items.Count > 0) {
310        for (int i = 0; i < itemsListView.Columns.Count; i++)
311          itemsListView.Columns[i].AutoResize(ColumnHeaderAutoResizeStyle.ColumnContent);
312      }
313    }
314    #endregion
315  }
316}
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