/// <summary>
/// Internal use only.
/// </summary>
/// <param name="name"></param>
/// <param name="level"></param>
/// <param name="parent"></param>
public CollectionViewGroupNode(object name, int level, CollectionViewGroupNode parent)
: base(name)
{
_parent = parent;
_level = level;
_root = GetRoot();
}
private CollectionViewGroupNode GetGroupNode(int level, object name)
{
var node = this.Items.Cast <CollectionViewGroupNode>().Where(n => object.Equals(n.Name, name)).FirstOrDefault();
if (node == null)
{
node = new CollectionViewGroupNode(name, level, this);
AddItem(node);
}
return(node);
}
/// <summary>
///
/// </summary>
/// <param name="item"></param>
/// <param name="level"></param>
/// <param name="parent"></param>
protected void AddItemToGroup(object item, int level, CollectionViewGroupNode parent)
{
if (IsBottomLevel)
{
AddItem(item);
}
else
{
var gd = _root.GroupDescriptions[level];
var groupName = gd.GroupNameFromItem(item, level, System.Globalization.CultureInfo.CurrentCulture);
int newLevel = level + 1;
var node = GetGroupNode(newLevel, groupName);
node.AddItemToGroup(item, newLevel, this);
}
}
bool IEnumerator.MoveNext()
{
while ((_subEnum == null) || !_subEnum.MoveNext())
{
_index++;
if (_index >= _group.Items.Count)
{
return(false);
}
CollectionViewGroupNode node = _group.Items[_index] as CollectionViewGroupNode;
if (node == null)
{
_current = _group.Items[_index];
_subEnum = null;
return(true);
}
_subEnum = node.GetLeafEnumerator();
}
_current = _subEnum.Current;
return(true);
}
public LeafEnumerator(CollectionViewGroupNode group)
{
_group = group;
DoReset();
}
public LeafEnumerator(CollectionViewGroupNode group) {
_group = group;
DoReset();
}
private CollectionViewGroupNode GetGroupNode(int level, object name) {
var node = this.Items.Cast<CollectionViewGroupNode>().Where(n => object.Equals(n.Name, name)).FirstOrDefault();
if (node == null) {
node = new CollectionViewGroupNode(name, level, this);
AddItem(node);
}
return node;
}
/// <summary>
///
/// </summary>
/// <param name="item"></param>
/// <param name="level"></param>
/// <param name="parent"></param>
protected void RemoveItemFromGroup(object item, int level, CollectionViewGroupNode parent) {
if (IsBottomLevel) {
RemoveItem(item);
RemoveGroupIfEmpty();
} else {
var gd = _root.GroupDescriptions[level];
var groupName = gd.GroupNameFromItem(item, level, System.Globalization.CultureInfo.CurrentCulture);
int newLevel = level + 1;
var node = GetGroupNode(newLevel, groupName);
node.RemoveItemFromGroup(item, newLevel, this);
}
}
/// <summary>
/// Internal use only.
/// </summary>
/// <param name="name"></param>
/// <param name="level"></param>
/// <param name="parent"></param>
public CollectionViewGroupNode(object name, int level, CollectionViewGroupNode parent)
: base(name) {
_parent = parent;
_level = level;
_root = GetRoot();
}