/// <summary>
/// Removes all items from the collection.
/// </summary>
public void Clear()
{
_listView.BeginUpdate();
//avoid firing one SelectedItemsChanged event for every selected item
if (_listView.SelectedItems.Count > 0)
{
_listView.SelectedItems.Clear();
}
for (int index = 0; index < _data.Count; ++index)
{
TreeListViewItem item = this[index];
item.Selected = false;
item.Focused = false;
item.OwnerListView = null;
for (int subIndex = 0; subIndex < item.SubItems.Count; ++subIndex)
{
if (item.SubItems[subIndex].ItemControl != null)
{
item.SubItems[subIndex].ItemControl.Parent = null;
item.SubItems[subIndex].ItemControl.Visible = false;
item.SubItems[subIndex].ItemControl = null;
}
}
}
_data.Clear();
_listView.EndUpdate();
}
/// <summary>
/// Indicates the <see cref="TreeListViewItem"/> at the specified indexed
/// location in the collection. In C#, this property is the indexer for the
/// <b>TreeListViewItemCollection</b> class.
/// </summary>
public TreeListViewItem this[int index]
{
get
{
return(_data[index] as TreeListViewItem);
}
set
{
if (value == null)
{
throw new ArgumentNullException("value", "TreeListView cannot contain null TreeListViewItems");
}
if (value != _data[index])
{
// remove the existing item
TreeListViewItem item = this[index];
item.OwnerListView = null;
// and add the new item in place
_data[index] = value;
value.OwnerListView = _listView;
}
}
}
/// <summary>
/// Removes the specified collection of items from the collection.
/// </summary>
/// <param name="item">A list of items to remove from the collection.</param>
public void RemoveRange(System.Collections.Generic.IList <TreeListViewItem> items)
{
if (items == null)
{
return;
}
// Aulofee customization - start. Line below added.
_listView.BeginUpdate();
TreeListViewItem recalculateFrom = null;
for (int i = items.Count - 1; i >= 0; i--)
{
TreeListViewItem newRecalculateFrom = RemoveInternal(items[i]);
if (recalculateFrom == null || newRecalculateFrom.Y < recalculateFrom.Y)
{
recalculateFrom = newRecalculateFrom;
}
}
_listView.RecalculateItemPositions(recalculateFrom);
// Aulofee customization - start. Line below added.
_listView.EndUpdate();
}
/// <summary>
/// Inserts an existing <see cref="TreeListViewItem"/> object to the collection at the specified index.
/// </summary>
/// <param name="index">The zero-based index location where the item is inserted.</param>
/// <param name="item">The <b>TreeListViewItem</b> object to add to the collection.</param>
public void Insert(int index, TreeListViewItem item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
if (_data.Count != 0 && index > 0)
{
TreeListViewItem previousItem = _data[index - 1] as TreeListViewItem;
item.InternalPreviousItem = previousItem;
previousItem.InternalNextItem = item;
}
if (_data.Count - 1 >= index)
{
TreeListViewItem nextItem = _data[index] as TreeListViewItem;
item.InternalNextItem = nextItem;
}
lock (_data.SyncRoot)
_data.Insert(index, item);
item.InternalParentItem = _owningItem;
SetTreeListViewOwnerRecursive(item, _listView);
}
internal TreeListViewItem GetItemAt(int y)
{
TreeListViewItem lastItem = null;
if (_items != null)
{
for (int index = 0; index < _items.Count; ++index)
{
TreeListViewItem item = _items[index];
if (y >= item.Y && y < (item.Y + item.Height) && item._filter.Belongs(item)) // base case if it is this node
{
return(item);
}
if (y < item.Y && lastItem != null && lastItem.Expanded) // must be a child of the last item
{
return(lastItem.GetItemAt(y));
}
lastItem = item;
}
if (lastItem != null && lastItem.Expanded)
{
return(lastItem.GetItemAt(y));
}
}
return(null);
}
/// <summary>
/// Adds an existing <see cref="TreeListViewItem"/> object to the collection.
/// </summary>
/// <param name="item">The <b>TreeListViewItem</b> object to add to the collection.</param>
/// <returns>The position into which the new element was inserted.</returns>
public int Add(TreeListViewItem item)
{
int index = _data.Count;
Insert(index, item);
return(index);
}
/// <summary>
/// Inserts an item to the collection with the specified properties at the specified index.
/// </summary>
/// <param name="index">The zero-based index location where the item is inserted.</param>
/// <param name="text">The text to display.</param>
/// <param name="imageIndex">The index of the image to display.</param>
/// <param name="selectedImageIndex">The index of the image to display when the item is selected.</param>
/// <returns>The <see cref="TreeListViewItem"/> that was added to the collection.</returns>
public TreeListViewItem Insert(int index, string text, int imageIndex, int selectedImageIndex)
{
TreeListViewItem item = new TreeListViewItem(text, imageIndex, selectedImageIndex);
Insert(index, item);
return(item);
}
/// <summary>
/// Inserts an item to the collection with the specified text at the specified index.
/// </summary>
/// <param name="index">The zero-based index location where the item is inserted.</param>
/// <param name="text">The text to display.</param>
/// <returns>The <see cref="TreeListViewItem"/> that was added to the collection.</returns>
public TreeListViewItem Insert(int index, string text)
{
TreeListViewItem item = new TreeListViewItem(text);
Insert(index, item);
return(item);
}
private int AutoSizeItems(TreeListViewItemCollection items)
{
int colIndex = this.Index;
int colDisplayIndex = this.DisplayIndex;
int twid = 0;
int mwid = 0;
int baseIndent = 0;
if (colDisplayIndex == 0)
{
if (ListView.ShowPlusMinus || (ListView.ShowTreeLines && ListView.ShowRootTreeLines))
{
baseIndent += 16;
}
}
for (int index = 0; index < items.Count; ++index)
{
twid = 0;
TreeListViewItem item = items[index];
Font fnt = item.Font;
if (fnt == null)
{
fnt = Font;
}
if (item.ImageIndex > -1 || item.SelectedImageIndex > -1)
{
twid += 16;
}
if (colDisplayIndex == 0)
{
twid += baseIndent + (16 * (item.Depth - 1));
}
twid += GetStringWidth(item.SubItems[colIndex].Text, fnt) + 10;
twid += 5;
if (twid > mwid)
{
mwid = twid;
}
if (item.HasChildren && item.Expanded)
{
twid = AutoSizeItems(item.Items);
if (twid > mwid)
{
mwid = twid;
}
}
}
return(mwid);
}
internal void SetTreeListViewOwnerRecursive(TreeListViewItem item, TreeListView treeListView)
{
if (item.Items.Count > 0)
{
foreach (TreeListViewItem childItem in item.Items)
{
SetTreeListViewOwnerRecursive(childItem, treeListView);
}
}
item.OwnerListView = treeListView;
}
internal TreeListViewSubItemCollection(TreeListViewItem item)
{
_owningItem = item;
if (_owningItem.ListView != null)
{
_data = new ArrayList(_owningItem.ListView.Columns.Count);
}
else
{
_data = new ArrayList();
}
}
/// <summary>
/// Removes the specified <see cref="TreeListViewItem"/> from the collection.
/// </summary>
/// <param name="item">A <see cref="TreeListViewItem"/> to remove from the collection.</param>
/// <custom type="modified">Fixed bugs (the method was throwing exceptions) and improved the method.</custom>
public void Remove(TreeListViewItem item)
{
// Aulofee customization - start. Bug fixed + improvments (initial method is at the end)
if (item == null)
{
return;
}
// Aulofee customization - start. Line below added.
_listView.BeginUpdate();
TreeListViewItem recalculateFrom = RemoveInternal(item);
_listView.RecalculateItemPositions(recalculateFrom);
// Aulofee customization - start. Line below added.
_listView.EndUpdate();
}
/// <summary>
/// Performs the filtering for the passed in <see cref="TreeListViewItem"/>.
/// </summary>
/// <param name="o">An object that should represent a <see cref="TreeListViewItem"/>.</param>
/// <returns></returns>
public bool Belongs(object o)
{
TreeListViewItem item = o as TreeListViewItem;
if (o == null)
{
return(false);
}
string actual = item.SubItems[_columnIndex].Text.ToLower(CultureInfo.CurrentCulture);
if (actual.IndexOf(_string) != -1)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Creates a copy of this <see cref="TreeListViewItem"/> that is not attached to a list.
/// </summary>
/// <returns></returns>
public object Clone()
{
TreeListViewItem lvi = new TreeListViewItem();
lvi._backColor = _backColor;
lvi._font = _font;
lvi._foreColor = _foreColor;
lvi._imageIndex = _imageIndex;
lvi._selectedImageIndex = _selectedImageIndex;
lvi._expandedImageIndex = _expandedImageIndex;
lvi._listView = _listView;
lvi._tag = _tag;
for (int index = 0; index < _subItems.Count; ++index)
{
lvi._subItems[index] = _subItems[index].Clone();
}
return(lvi);
}
public string GetPath(char pathSeperatorBefore, char pathSeperatorAfter)
{
string nodePath = string.Empty;
TreeListViewItem currentItem = this;
if (currentItem.ParentItem == currentItem.ListView.RootItem)
{
nodePath = currentItem.Text;
}
else
{
bool isLastItem = true;
while (currentItem != currentItem.ListView.RootItem)
{
if (pathSeperatorAfter == '\0')
{
if (isLastItem)
{
nodePath = currentItem.Text + nodePath;
}
else
{
nodePath = currentItem.Text + pathSeperatorBefore + nodePath;
}
}
else
{
nodePath = pathSeperatorBefore + currentItem.Text + pathSeperatorAfter + nodePath;
}
currentItem = currentItem.ParentItem;
isLastItem = false;
}
}
return(nodePath);
}
internal TreeListViewItem RemoveInternal(TreeListViewItem item)
{
TreeListViewItem recalculateFrom = null;
if (item.InternalPreviousItem != null && item.InternalNextItem != null)
{
item.InternalPreviousItem.InternalNextItem = item.InternalNextItem;
item.InternalNextItem.InternalPreviousItem = item.InternalPreviousItem;
recalculateFrom = item.InternalPreviousItem;
}
else if (item.InternalPreviousItem != null)
{
item.InternalPreviousItem.InternalNextItem = null;
recalculateFrom = item.InternalPreviousItem;
}
else if (item.InternalNextItem != null)
{
item.InternalNextItem.InternalPreviousItem = null;
}
lock (_data.SyncRoot)
_data.Remove(item);
item.Selected = false;
item.Focused = false;
item.OwnerListView = null;
item.InternalParentItem = null;
foreach (TreeListViewSubItem si in item.SubItems)
{
if (si.ItemControl != null)
{
si.ItemControl.Visible = false;
}
}
return(recalculateFrom);
}
/// <summary>
/// Sorts the elements using the specified comparer.
/// </summary>
/// <param name="comparer">The <see cref="IComparer"/> to use when comparing elements.</param>
/// <param name="recursiveSort">Whether to sort these items child items as well.</param>
public void Sort(IComparer comparer, bool recursiveSort)
{
try
{
_data.Sort(comparer);
TreeListViewItem lastItem = null;
TreeListViewItem curItem = null;
for (int index = 0; index < _data.Count; ++index)
{
curItem = this[index];
curItem.InternalPreviousItem = lastItem;
if (lastItem != null)
{
lastItem.InternalNextItem = curItem;
}
lastItem = curItem;
if (recursiveSort && curItem.HasChildren)
{
curItem.Items.Sort(comparer, recursiveSort);
}
}
if (curItem != null)
{
curItem.InternalNextItem = null;
}
}
catch
{
// TODO: should likely refine this and determine the cause of the error and handle appropriately.
}
}
/// <summary>
/// Compares the two incoming <see cref="TreeListViewItem"/> elements.
/// </summary>
/// <param name="item1">The first item to compare.</param>
/// <param name="item2">The second item to compare.</param>
/// <returns>Zero if equal, -1 if item1 < item2, 1 if item1 > item2</returns>
public int Compare(TreeListViewItem item1, TreeListViewItem item2)
{
for (int index = 0; index < _sortColumns.Length; ++index)
{
// cache these values so as to make all of this a little bit faster
TreeListViewColumnHeader sortColumn = _sortColumns[index];
int sortColumnIndex = _sortColumnIndices[index];
SortOrder sortOrder = sortColumn.SortOrder;
SortDataType sortDataType = sortColumn.SortDataType;
if (item1 == null || item2 == null || sortOrder == SortOrder.None || sortDataType == SortDataType.None)
{
return(0); // We don't know type, the order, or the data - so both objects are same for us
}
int n = 0;
TreeListViewSubItem subItem1 = sortOrder == SortOrder.Ascending ? item1.SubItems[sortColumnIndex] : item2.SubItems[sortColumnIndex];
TreeListViewSubItem subItem2 = sortOrder == SortOrder.Ascending ? item2.SubItems[sortColumnIndex] : item1.SubItems[sortColumnIndex];
if (sortDataType == SortDataType.Custom)
{
n = sortColumn.CustomSortComparer.Compare(subItem1, subItem2);
}
else
{
n = CompareItems(subItem1.Text, subItem2.Text, sortDataType);
}
if (n != 0)
{
return(n);
}
}
return(0);
}
/// <summary>
/// Returns the index within the collection of the specified item.
/// </summary>
/// <param name="item">A <see cref="TreeListViewItem"/> representing the item to locate in the collection.</param>
/// <returns>The zero-based index of the item's location in the collection. If the item is not located in the collection the return value is negative one (-1).</returns>
public int IndexOf(TreeListViewItem item)
{
return(_data.IndexOf(item));
}
/// <summary>
/// Determines whether the specified item is located in the collection.
/// </summary>
/// <param name="item">A <see cref="TreeListViewItem"/> representing the item to locate in the collection.</param>
/// <returns><b>true</b> if the column is contained in the collection; otherwise, <b>false</b>.</returns>
public bool Contains(TreeListViewItem item)
{
return(_data.Contains(item));
}
internal TreeListViewItemCollection(TreeListViewItem owningItem)
{
_owningItem = owningItem;
}
