[3595] | 1 | #region License Information
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[3565] | 2 | /* HeuristicLab
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[16565] | 3 | * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[3565] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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[9026] | 22 | using System;
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[9839] | 23 | using System.Collections.Generic;
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[9026] | 24 | using System.Drawing;
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[7195] | 25 | using System.Linq;
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[3565] | 26 | using System.Windows.Forms;
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| 27 | using HeuristicLab.Collections;
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| 28 | using HeuristicLab.MainForm;
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| 29 |
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| 30 | namespace HeuristicLab.Core.Views {
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| 31 | /// <summary>
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| 32 | /// The visual representation of a list of checked items.
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| 33 | /// </summary>
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| 34 | [View("CheckedItemList View")]
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| 35 | [Content(typeof(CheckedItemList<>), true)]
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[3628] | 36 | [Content(typeof(ICheckedItemList<>), true)]
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[12618] | 37 | [Content(typeof(ReadOnlyCheckedItemList<>), true)]
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[3595] | 38 | public partial class CheckedItemListView<T> : ItemListView<T> where T : class, IItem {
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[17120] | 39 | private bool suppressCheckedEvents;
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| 40 |
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[3565] | 41 | public new ICheckedItemList<T> Content {
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| 42 | get { return (ICheckedItemList<T>)base.Content; }
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| 43 | set { base.Content = value; }
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| 44 | }
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| 45 |
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[3595] | 46 | public CheckedItemListView()
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| 47 | : base() {
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| 48 | InitializeComponent();
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[3565] | 49 | }
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| 50 |
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[3595] | 51 | protected override void RegisterContentEvents() {
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| 52 | Content.CheckedItemsChanged += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_CheckedItemsChanged);
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| 53 | base.RegisterContentEvents();
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[3565] | 54 | }
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| 55 | protected override void DeregisterContentEvents() {
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| 56 | Content.CheckedItemsChanged -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_CheckedItemsChanged);
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| 57 | base.DeregisterContentEvents();
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| 58 | }
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| 59 |
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[9026] | 60 | protected override void OnContentChanged() {
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| 61 | base.OnContentChanged();
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| 62 | if (Content != null) {
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| 63 | SetNumberOfCheckItems();
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| 64 | }
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| 65 | }
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| 66 |
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[6233] | 67 | private Color backupColor = Color.Empty;
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[3904] | 68 | protected override void SetEnabledStateOfControls() {
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[7195] | 69 | if (backupColor == Color.Empty) backupColor = base.itemsListView.BackColor;
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[3904] | 70 | base.SetEnabledStateOfControls();
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[6233] | 71 | if (ReadOnly || Locked)
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| 72 | base.itemsListView.BackColor = ListView.DefaultBackColor;
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| 73 | else
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| 74 | base.itemsListView.BackColor = backupColor;
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[3565] | 75 | }
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| 76 |
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[3595] | 77 | protected override ListViewItem CreateListViewItem(T item) {
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| 78 | ListViewItem listViewItem = base.CreateListViewItem(item);
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[3565] | 79 | listViewItem.Checked = Content.ItemChecked(item);
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| 80 | return listViewItem;
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| 81 | }
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| 82 |
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| 83 | #region ListView Events
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[3788] | 84 | private bool doubleClick;
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[3738] | 85 | protected virtual void itemsListView_ItemCheck(object sender, ItemCheckEventArgs e) {
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[3788] | 86 | if (doubleClick) {
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| 87 | e.NewValue = e.CurrentValue;
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| 88 | doubleClick = false;
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| 89 | } else {
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| 90 | bool check = e.NewValue == CheckState.Checked;
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[17120] | 91 | if (Content.ItemChecked(e.Index) == check) return;
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| 92 |
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| 93 | suppressCheckedEvents = true;
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| 94 | try {
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| 95 | if (itemsListView.SelectedIndices.Count > 1
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| 96 | && itemsListView.SelectedIndices.Contains(e.Index)) {
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| 97 | if (!ReadOnly && !Locked) Content.SetItemCheckedState(itemsListView.SelectedIndices.Cast<int>(), check);
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| 98 | else e.NewValue = e.CurrentValue;
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| 99 | } else {
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| 100 | var checkedItem = (T)itemsListView.Items[e.Index].Tag;
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| 101 | if (!ReadOnly && !Locked) Content.SetItemCheckedState(checkedItem, check);
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| 102 | else e.NewValue = e.CurrentValue;
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| 103 | }
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| 104 | } finally { suppressCheckedEvents = false; }
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[3565] | 105 | }
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| 106 | }
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[3788] | 107 |
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| 108 | protected void itemsListView_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) {
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| 109 | if (e.Clicks > 1)
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| 110 | doubleClick = true;
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| 111 | }
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[7195] | 112 |
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| 113 | protected override void itemsListView_DragEnter(object sender, DragEventArgs e) {
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| 114 | validDragOperation = false;
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| 115 | if (Locked || ReadOnly) return;
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| 116 |
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| 117 | var data = e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat) as ICheckedItemList<T>;
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| 118 | if (data != null)
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[15707] | 119 | validDragOperation = Content.Select(x => x.ToString()).SequenceEqual(data.Select(x => x.ToString()));
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[7195] | 120 | else
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| 121 | base.itemsListView_DragEnter(sender, e);
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| 122 | }
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| 123 |
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| 124 | protected override void itemsListView_DragOver(object sender, DragEventArgs e) {
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| 125 | e.Effect = DragDropEffects.None;
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| 126 | if (!validDragOperation) return;
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| 127 |
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| 128 | var data = e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat) as ICheckedItemList<T>;
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| 129 | if (data != null)
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| 130 | e.Effect = DragDropEffects.Copy;
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| 131 | else
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| 132 | base.itemsListView_DragOver(sender, e);
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| 133 | }
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| 134 |
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| 135 | protected override void itemsListView_DragDrop(object sender, DragEventArgs e) {
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| 136 | if (e.Effect == DragDropEffects.None) return;
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| 137 | var data = e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat) as ICheckedItemList<T>;
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| 138 | if (data != null) {
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[15707] | 139 | for (int i = 0; i < Content.Count; i++) {
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| 140 | Content.SetItemCheckedState(Content[i], data.ItemChecked(data[i]));
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[7195] | 141 | }
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| 142 | } else
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| 143 | base.itemsListView_DragDrop(sender, e);
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| 144 | }
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[3565] | 145 | #endregion
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| 146 |
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| 147 | #region Content Events
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| 148 | protected virtual void Content_CheckedItemsChanged(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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| 149 | if (InvokeRequired)
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| 150 | Invoke(new CollectionItemsChangedEventHandler<IndexedItem<T>>(Content_CheckedItemsChanged), sender, e);
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| 151 | else {
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[17120] | 152 | if (!suppressCheckedEvents) UpdateCheckedItemState(e.Items);
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[9026] | 153 | SetNumberOfCheckItems();
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[3565] | 154 | }
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| 155 | }
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[9134] | 156 | protected override void Content_CollectionReset(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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| 157 | base.Content_CollectionReset(sender, e);
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| 158 | SetNumberOfCheckItems();
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| 159 | }
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| 160 | protected override void Content_ItemsAdded(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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| 161 | base.Content_ItemsAdded(sender, e);
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| 162 | SetNumberOfCheckItems();
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| 163 | }
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| 164 | protected override void Content_ItemsMoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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| 165 | base.Content_ItemsMoved(sender, e);
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[9839] | 166 | UpdateCheckedItemState(e.Items);
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[9134] | 167 | SetNumberOfCheckItems();
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| 168 | }
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| 169 | protected override void Content_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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| 170 | base.Content_ItemsRemoved(sender, e);
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| 171 | SetNumberOfCheckItems();
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| 172 | }
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| 173 | protected override void Content_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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| 174 | base.Content_ItemsReplaced(sender, e);
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| 175 | SetNumberOfCheckItems();
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| 176 | }
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[3565] | 177 | #endregion
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[9026] | 178 |
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| 179 | private void SetNumberOfCheckItems() {
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[9134] | 180 | if (InvokeRequired) {
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| 181 | Invoke((Action)SetNumberOfCheckItems);
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| 182 | } else {
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| 183 | this.itemsGroupBox.Text = String.Format("Items (Checked: {0}/{1})", Content.CheckedItems.Count(), Content.Count);
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| 184 | }
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[9026] | 185 | }
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[9839] | 186 |
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| 187 | private void UpdateCheckedItemState(IEnumerable<IndexedItem<T>> items) {
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[17120] | 188 | itemsListView.BeginUpdate();
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| 189 | try {
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| 190 | foreach (var item in items) {
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| 191 | var isChecked = Content.ItemChecked(item.Value);
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| 192 | if (itemsListView.Items[item.Index].Checked != isChecked)
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| 193 | itemsListView.Items[item.Index].Checked = isChecked;
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| 194 | }
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| 195 | } finally { itemsListView.EndUpdate(); itemsListView.Refresh(); }
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[9839] | 196 | }
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[3565] | 197 | }
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| 198 | }
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