#region License Information
/* HeuristicLab
* Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
*
* This file is part of HeuristicLab.
*
* HeuristicLab is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* HeuristicLab is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with HeuristicLab. If not, see .
*/
#endregion
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using HeuristicLab.Collections;
using HeuristicLab.Common;
using HeuristicLab.MainForm;
using HeuristicLab.MainForm.WindowsForms;
using HeuristicLab.PluginInfrastructure;
namespace HeuristicLab.Core.Views {
[View("ItemCollection View")]
[Content(typeof(ItemCollection<>), true)]
[Content(typeof(IItemCollection<>), false)]
public partial class ItemCollectionView : ItemView where T : class, IItem {
protected Dictionary> itemListViewItemMapping;
protected TypeSelectorDialog typeSelectorDialog;
protected bool validDragOperation;
public new IItemCollection Content {
get { return (IItemCollection)base.Content; }
set { base.Content = value; }
}
public ListView ItemsListView {
get { return itemsListView; }
}
public ItemCollectionView() {
InitializeComponent();
itemListViewItemMapping = new Dictionary>();
}
protected override void Dispose(bool disposing) {
if (disposing) {
if (typeSelectorDialog != null) typeSelectorDialog.Dispose();
if (components != null) components.Dispose();
}
base.Dispose(disposing);
}
protected override void DeregisterContentEvents() {
Content.ItemsAdded -= new CollectionItemsChangedEventHandler(Content_ItemsAdded);
Content.ItemsRemoved -= new CollectionItemsChangedEventHandler(Content_ItemsRemoved);
Content.CollectionReset -= new CollectionItemsChangedEventHandler(Content_CollectionReset);
foreach (T item in itemListViewItemMapping.Keys) {
DeregisterItemEvents(item);
}
base.DeregisterContentEvents();
}
protected override void RegisterContentEvents() {
base.RegisterContentEvents();
Content.ItemsAdded += new CollectionItemsChangedEventHandler(Content_ItemsAdded);
Content.ItemsRemoved += new CollectionItemsChangedEventHandler(Content_ItemsRemoved);
Content.CollectionReset += new CollectionItemsChangedEventHandler(Content_CollectionReset);
}
protected virtual void DeregisterItemEvents(T item) {
item.ItemImageChanged -= new EventHandler(Item_ItemImageChanged);
item.ToStringChanged -= new EventHandler(Item_ToStringChanged);
}
protected virtual void RegisterItemEvents(T item) {
item.ItemImageChanged += new EventHandler(Item_ItemImageChanged);
item.ToStringChanged += new EventHandler(Item_ToStringChanged);
}
protected override void OnContentChanged() {
base.OnContentChanged();
itemsListView.Items.Clear();
itemListViewItemMapping.Clear();
RebuildImageList();
viewHost.Content = null;
if (Content != null) {
Caption += " (" + Content.GetType().Name + ")";
foreach (T item in Content)
AddListViewItem(CreateListViewItem(item));
AdjustListViewColumnSizes();
SortItemsListView(SortOrder.Ascending);
}
}
protected override void SetEnabledStateOfControls() {
base.SetEnabledStateOfControls();
if (Content == null) {
addButton.Enabled = false;
sortAscendingButton.Enabled = false;
sortDescendingButton.Enabled = false;
removeButton.Enabled = false;
itemsListView.Enabled = false;
detailsGroupBox.Enabled = false;
} else {
addButton.Enabled = !Content.IsReadOnly && !ReadOnly;
sortAscendingButton.Enabled = itemsListView.Items.Count > 1;
sortDescendingButton.Enabled = itemsListView.Items.Count > 1;
removeButton.Enabled = !Content.IsReadOnly && !ReadOnly && itemsListView.SelectedItems.Count > 0;
itemsListView.Enabled = true;
detailsGroupBox.Enabled = itemsListView.SelectedItems.Count == 1;
}
}
protected virtual T CreateItem() {
if (typeSelectorDialog == null) {
typeSelectorDialog = new TypeSelectorDialog();
typeSelectorDialog.Caption = "Select Item";
typeSelectorDialog.TypeSelector.Caption = "Available Items";
typeSelectorDialog.TypeSelector.Configure(typeof(T), false, true);
}
if (typeSelectorDialog.ShowDialog(this) == DialogResult.OK) {
try {
return (T)typeSelectorDialog.TypeSelector.CreateInstanceOfSelectedType();
}
catch (Exception ex) {
ErrorHandling.ShowErrorDialog(this, ex);
}
}
return null;
}
protected virtual ListViewItem CreateListViewItem(T item) {
ListViewItem listViewItem = new ListViewItem();
if (item == null) {
listViewItem.Text = "null";
itemsListView.SmallImageList.Images.Add(HeuristicLab.Common.Resources.VSImageLibrary.Nothing);
listViewItem.ImageIndex = itemsListView.SmallImageList.Images.Count - 1;
} else {
listViewItem.Text = item.ToString();
listViewItem.ToolTipText = item.ItemName + ": " + item.ItemDescription;
itemsListView.SmallImageList.Images.Add(item.ItemImage);
listViewItem.ImageIndex = itemsListView.SmallImageList.Images.Count - 1;
listViewItem.Tag = item;
}
return listViewItem;
}
protected virtual void AddListViewItem(ListViewItem listViewItem) {
if (listViewItem == null) throw new ArgumentNullException();
T item = (listViewItem.Tag as T);
itemsListView.Items.Add(listViewItem);
if (item != null) {
if (!itemListViewItemMapping.ContainsKey(item)) {
RegisterItemEvents(item);
itemListViewItemMapping.Add(item, new List());
}
itemListViewItemMapping[item].Add(listViewItem);
}
sortAscendingButton.Enabled = itemsListView.Items.Count > 1;
sortDescendingButton.Enabled = itemsListView.Items.Count > 1;
}
protected virtual void RemoveListViewItem(ListViewItem listViewItem) {
if (listViewItem == null) throw new ArgumentNullException();
T item = (listViewItem.Tag as T);
if (item != null) {
itemListViewItemMapping[item].Remove(listViewItem);
if (itemListViewItemMapping[item].Count == 0) {
itemListViewItemMapping.Remove(item);
DeregisterItemEvents(item);
}
}
listViewItem.Remove();
sortAscendingButton.Enabled = itemsListView.Items.Count > 1;
sortDescendingButton.Enabled = itemsListView.Items.Count > 1;
}
protected virtual void UpdateListViewItemImage(ListViewItem listViewItem) {
if (listViewItem == null) throw new ArgumentNullException();
T item = listViewItem.Tag as T;
int i = listViewItem.ImageIndex;
itemsListView.SmallImageList.Images[i] = item == null ? HeuristicLab.Common.Resources.VSImageLibrary.Nothing : item.ItemImage;
listViewItem.ImageIndex = -1;
listViewItem.ImageIndex = i;
}
protected virtual void UpdateListViewItemText(ListViewItem listViewItem) {
if (listViewItem == null) throw new ArgumentNullException();
T item = listViewItem.Tag as T;
listViewItem.Text = item == null ? "null" : item.ToString();
listViewItem.ToolTipText = item == null ? string.Empty : item.ItemName + ": " + item.ItemDescription;
}
protected virtual IEnumerable GetListViewItemsForItem(T item) {
if (item == null) {
List listViewItems = new List();
foreach (ListViewItem listViewItem in itemsListView.Items) {
if (listViewItem.Tag == null) listViewItems.Add(listViewItem);
}
return listViewItems;
} else {
List listViewItems = null;
itemListViewItemMapping.TryGetValue(item, out listViewItems);
return listViewItems == null ? Enumerable.Empty() : listViewItems;
}
}
#region ListView Events
protected virtual void itemsListView_SelectedIndexChanged(object sender, EventArgs e) {
removeButton.Enabled = (Content != null) && !Content.IsReadOnly && !ReadOnly && itemsListView.SelectedItems.Count > 0;
AdjustListViewColumnSizes();
if (showDetailsCheckBox.Checked) {
if (itemsListView.SelectedItems.Count == 1) {
T item = (T)itemsListView.SelectedItems[0].Tag;
detailsGroupBox.Enabled = true;
viewHost.Content = item;
} else {
viewHost.Content = null;
detailsGroupBox.Enabled = false;
}
}
}
protected virtual void itemsListView_KeyDown(object sender, KeyEventArgs e) {
if (e.KeyCode == Keys.Delete) {
if ((itemsListView.SelectedItems.Count > 0) && !Content.IsReadOnly && !ReadOnly) {
foreach (ListViewItem item in itemsListView.SelectedItems)
Content.Remove((T)item.Tag);
}
}
}
protected virtual void itemsListView_DoubleClick(object sender, EventArgs e) {
if (itemsListView.SelectedItems.Count == 1) {
T item = itemsListView.SelectedItems[0].Tag as T;
if (item != null) {
IContentView view = MainFormManager.MainForm.ShowContent(item);
if (view != null) {
view.ReadOnly = ReadOnly;
view.Locked = Locked;
}
}
}
}
protected virtual void itemsListView_ItemDrag(object sender, ItemDragEventArgs e) {
if (!Locked) {
List items = new List();
foreach (ListViewItem listViewItem in itemsListView.SelectedItems) {
T item = listViewItem.Tag as T;
if (item != null) items.Add(item);
}
if (items.Count > 0) {
DataObject data = new DataObject();
if (items.Count == 1) data.SetData(HeuristicLab.Common.Constants.DragDropDataFormat, items[0]);
else data.SetData(HeuristicLab.Common.Constants.DragDropDataFormat, items);
if (Content.IsReadOnly || ReadOnly) {
DoDragDrop(data, DragDropEffects.Copy | DragDropEffects.Link);
} else {
DragDropEffects result = DoDragDrop(data, DragDropEffects.Copy | DragDropEffects.Link | DragDropEffects.Move);
if ((result & DragDropEffects.Move) == DragDropEffects.Move) {
foreach (T item in items) Content.Remove(item);
}
}
}
}
}
protected virtual void itemsListView_DragEnter(object sender, DragEventArgs e) {
validDragOperation = false;
if (!Content.IsReadOnly && !ReadOnly && (e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat) is T)) {
validDragOperation = true;
} else if (!Content.IsReadOnly && !ReadOnly && (e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat) is IEnumerable)) {
validDragOperation = true;
IEnumerable items = (IEnumerable)e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat);
foreach (object item in items)
validDragOperation = validDragOperation && (item is T);
}
}
protected virtual void itemsListView_DragOver(object sender, DragEventArgs e) {
e.Effect = DragDropEffects.None;
if (validDragOperation) {
if ((e.KeyState & 32) == 32) e.Effect = DragDropEffects.Link; // ALT key
else if ((e.KeyState & 4) == 4) e.Effect = DragDropEffects.Move; // SHIFT key
else if (e.AllowedEffect.HasFlag(DragDropEffects.Copy)) e.Effect = DragDropEffects.Copy;
else if (e.AllowedEffect.HasFlag(DragDropEffects.Move)) e.Effect = DragDropEffects.Move;
else if (e.AllowedEffect.HasFlag(DragDropEffects.Link)) e.Effect = DragDropEffects.Link;
}
}
protected virtual void itemsListView_DragDrop(object sender, DragEventArgs e) {
if (e.Effect != DragDropEffects.None) {
if (e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat) is T) {
T item = (T)e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat);
Content.Add(e.Effect.HasFlag(DragDropEffects.Copy) ? (T)item.Clone() : item);
} else if (e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat) is IEnumerable) {
IEnumerable items = ((IEnumerable)e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat)).Cast();
if (e.Effect.HasFlag(DragDropEffects.Copy)) {
Cloner cloner = new Cloner();
items = items.Select(i => (T)i.Clone(cloner));
}
foreach (T item in items)
Content.Add(item);
}
}
}
#endregion
#region Button Events
protected virtual void addButton_Click(object sender, EventArgs e) {
T item = CreateItem();
if (item != null)
Content.Add(item);
}
protected virtual void sortAscendingButton_Click(object sender, EventArgs e) {
SortItemsListView(SortOrder.Ascending);
}
protected virtual void sortDescendingButton_Click(object sender, EventArgs e) {
SortItemsListView(SortOrder.Descending);
}
protected virtual void removeButton_Click(object sender, EventArgs e) {
if (itemsListView.SelectedItems.Count > 0) {
foreach (ListViewItem item in itemsListView.SelectedItems)
Content.Remove((T)item.Tag);
itemsListView.SelectedItems.Clear();
}
}
#endregion
#region CheckBox Events
protected virtual void showDetailsCheckBox_CheckedChanged(object sender, EventArgs e) {
if (showDetailsCheckBox.Checked) {
splitContainer.Panel2Collapsed = false;
detailsGroupBox.Enabled = itemsListView.SelectedItems.Count == 1;
viewHost.Content = itemsListView.SelectedItems.Count == 1 ? (T)itemsListView.SelectedItems[0].Tag : null;
} else {
splitContainer.Panel2Collapsed = true;
viewHost.Content = null;
}
}
#endregion
#region Content Events
protected virtual void Content_ItemsAdded(object sender, CollectionItemsChangedEventArgs e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler(Content_ItemsAdded), sender, e);
else {
foreach (T item in e.Items)
AddListViewItem(CreateListViewItem(item));
AdjustListViewColumnSizes();
}
}
protected virtual void Content_ItemsRemoved(object sender, CollectionItemsChangedEventArgs e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler(Content_ItemsRemoved), sender, e);
else {
foreach (T item in e.Items) {
//remove only the first matching ListViewItem, because the IItem could be contained multiple times in the ItemCollection
ListViewItem listviewItem = GetListViewItemsForItem(item).FirstOrDefault();
if (listviewItem != null) RemoveListViewItem(listviewItem);
}
RebuildImageList();
}
}
protected virtual void Content_CollectionReset(object sender, CollectionItemsChangedEventArgs e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler(Content_CollectionReset), sender, e);
else {
foreach (T item in e.OldItems) {
//remove only the first matching ListViewItem, because the IItem could be contained multiple times in the ItemCollection
ListViewItem listviewItem = GetListViewItemsForItem(item).FirstOrDefault();
if (listviewItem != null) RemoveListViewItem(listviewItem);
}
RebuildImageList();
foreach (T item in e.Items)
AddListViewItem(CreateListViewItem(item));
}
}
#endregion
#region Item Events
protected virtual void Item_ItemImageChanged(object sender, EventArgs e) {
if (InvokeRequired)
Invoke(new EventHandler(Item_ItemImageChanged), sender, e);
else {
T item = (T)sender;
foreach (ListViewItem listViewItem in GetListViewItemsForItem(item))
UpdateListViewItemImage(listViewItem);
}
}
protected virtual void Item_ToStringChanged(object sender, EventArgs e) {
if (InvokeRequired)
Invoke(new EventHandler(Item_ToStringChanged), sender, e);
else {
T item = (T)sender;
foreach (ListViewItem listViewItem in GetListViewItemsForItem(item))
UpdateListViewItemText(listViewItem);
}
}
#endregion
#region Helpers
protected virtual void SortItemsListView(SortOrder sortOrder) {
itemsListView.Sorting = SortOrder.None;
itemsListView.Sorting = sortOrder;
itemsListView.Sorting = SortOrder.None;
}
protected virtual void AdjustListViewColumnSizes() {
if (itemsListView.Items.Count > 0) {
for (int i = 0; i < itemsListView.Columns.Count; i++)
itemsListView.Columns[i].AutoResize(ColumnHeaderAutoResizeStyle.ColumnContent);
}
}
protected virtual void RebuildImageList() {
itemsListView.SmallImageList.Images.Clear();
foreach (ListViewItem listViewItem in itemsListView.Items) {
T item = listViewItem.Tag as T;
itemsListView.SmallImageList.Images.Add(item == null ? HeuristicLab.Common.Resources.VSImageLibrary.Nothing : item.ItemImage);
listViewItem.ImageIndex = itemsListView.SmallImageList.Images.Count - 1;
}
}
#endregion
}
}