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source: trunk/sources/HeuristicLab.Core.Views/3.3/CheckedItemListView.cs @ 3788

Last change on this file since 3788 was 3788, checked in by mkommend, 14 years ago

corrected behavior of CheckedItemCollectionViews (ticket #893)

File size: 3.9 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.Collections.Generic;
24using System.ComponentModel;
25using System.Drawing;
26using System.Data;
27using System.Linq;
28using System.Text;
29using System.Windows.Forms;
30using HeuristicLab.Collections;
31using HeuristicLab.MainForm;
32
33namespace HeuristicLab.Core.Views {
34  /// <summary>
35  /// The visual representation of a list of checked items.
36  /// </summary>
37  [View("CheckedItemList View")]
38  [Content(typeof(CheckedItemList<>), true)]
39  [Content(typeof(ICheckedItemList<>), true)]
40  public partial class CheckedItemListView<T> : ItemListView<T> where T : class, IItem {
41    public new ICheckedItemList<T> Content {
42      get { return (ICheckedItemList<T>)base.Content; }
43      set { base.Content = value; }
44    }
45
46    public CheckedItemListView()
47      : base() {
48      InitializeComponent();
49    }
50
51    protected override void RegisterContentEvents() {
52      Content.CheckedItemsChanged += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_CheckedItemsChanged);
53      base.RegisterContentEvents();
54    }
55    protected override void DeregisterContentEvents() {
56      Content.CheckedItemsChanged -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_CheckedItemsChanged);
57      base.DeregisterContentEvents();
58    }
59
60    protected override void OnContentChanged() {
61      base.OnContentChanged();
62      base.itemsListView.Enabled = !this.Locked;
63    }
64
65    protected override ListViewItem CreateListViewItem(T item) {
66      ListViewItem listViewItem = base.CreateListViewItem(item);
67      listViewItem.Checked = Content.ItemChecked(item);
68      return listViewItem;
69    }
70
71    protected override void OnLockedChanged() {
72      base.OnLockedChanged();
73      base.itemsListView.Enabled = !this.Locked;
74    }
75
76    #region ListView Events
77    private bool doubleClick;
78    protected virtual void itemsListView_ItemCheck(object sender, ItemCheckEventArgs e) {
79      if (doubleClick) {
80        e.NewValue = e.CurrentValue;
81        doubleClick = false;
82      } else {
83        var checkedItem = (T)itemsListView.Items[e.Index].Tag;
84        bool check = e.NewValue == CheckState.Checked;
85        if (Content.ItemChecked(checkedItem) != check) {
86          Content.SetItemCheckedState(checkedItem, check);
87        }
88      }
89    }
90
91    protected void itemsListView_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) {
92      if (e.Clicks > 1)
93        doubleClick = true;
94    }
95    #endregion
96
97    #region Content Events
98    protected virtual void Content_CheckedItemsChanged(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
99      if (InvokeRequired)
100        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_CheckedItemsChanged), sender, e);
101      else {
102        foreach (var item in e.Items) {
103          if (itemsListView.Items[item.Index].Checked != Content.ItemChecked(item.Value))
104            itemsListView.Items[item.Index].Checked = Content.ItemChecked(item.Value);
105        }
106      }
107    }
108    #endregion
109  }
110}
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