source: branches/2994-AutoDiffForIntervals/HeuristicLab.Core.Views/3.3/ItemSetView.cs

Last change on this file was 17209, checked in by gkronber, 2 months ago

#2994: merged r17132:17198 from trunk to branch

File size: 3.0 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 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.Collections;
23using System.Windows.Forms;
24using HeuristicLab.MainForm;
25
26namespace HeuristicLab.Core.Views {
27  [View("ItemSet View")]
28  [Content(typeof(ItemSet<>), true)]
29  [Content(typeof(IItemSet<>), false)]
30  [Content(typeof(ReadOnlyItemSet<>), true)]
31  public partial class ItemSetView<T> : ItemCollectionView<T> where T : class, IItem {
32    protected bool draggedItemsAlreadyContained;
33
34    public new IItemSet<T> Content {
35      get { return (IItemSet<T>)base.Content; }
36      set { base.Content = value; }
37    }
38
39    public ItemSetView() {
40      InitializeComponent();
41    }
42
43    protected override void itemsListView_DragEnter(object sender, DragEventArgs e) {
44      base.itemsListView_DragEnter(sender, e);
45      draggedItemsAlreadyContained = false;
46      if (validDragOperation) {
47        if (e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat) is T) {
48          draggedItemsAlreadyContained = Content.Contains((T)e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat));
49        } else if (e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat) is IEnumerable) {
50          IEnumerable items = (IEnumerable)e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat);
51          foreach (object item in items)
52            draggedItemsAlreadyContained = draggedItemsAlreadyContained || Content.Contains((T)item);
53        }
54      }
55    }
56    protected override void itemsListView_DragOver(object sender, DragEventArgs e) {
57      e.Effect = DragDropEffects.None;
58      if (validDragOperation) {
59        if (((e.KeyState & 32) == 32) && !draggedItemsAlreadyContained) e.Effect = DragDropEffects.Link;  // ALT key
60        else if (((e.KeyState & 4) == 4) && !draggedItemsAlreadyContained) e.Effect = DragDropEffects.Move;  // SHIFT key
61        else if (e.AllowedEffect.HasFlag(DragDropEffects.Copy)) e.Effect = DragDropEffects.Copy;
62        else if (e.AllowedEffect.HasFlag(DragDropEffects.Move) && !draggedItemsAlreadyContained) e.Effect = DragDropEffects.Move;
63        else if (e.AllowedEffect.HasFlag(DragDropEffects.Link) && !draggedItemsAlreadyContained) e.Effect = DragDropEffects.Link;
64      }
65    }
66  }
67}
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