internal void RemoveAtInternal(int index)
{
// if(TreeListView != null)
// if(TreeListView.InvokeRequired)
// throw(new Exception("Invoke required"));
TreeListViewItem item = this[index];
if (this[index].Visible && this.TreeListView != null)
{
item.Hide();
}
List.RemoveAt(index);
item.SetParent(null);
// Redraw parent if no more children
if (Count == 0 && TreeListView != null && Parent != null)
{
Parent.Redraw();
}
// Redraw new last item
if (Count > 0 && TreeListView != null && index == Count)
{
this[index - 1].Redraw();
}
OnItemRemoved(new TreeListViewEventArgs(item, TreeListViewAction.Unknown));
}
/// <summary>
/// Adds an item in the collection and in the TreeListView
/// </summary>
/// <param name="item"></param>
/// <returns>Index of the item in the collection</returns>
public virtual int Add(TreeListViewItem item)
{
// if(TreeListView != null)
// if(TreeListView.InvokeRequired)
// throw(new Exception("Invoke required"));
// Do not add the item if the collection owns a TreeListView recursively
// and the item already owns a TreeListView
if (TreeListView != null && item.ListView != null)
{
throw(new Exception("The Item is already in a TreeListView"));
}
int index = GetInsertCollectionIndex(item);
if (index == -1)
{
return(-1);
}
if (Parent != null)
{
item.SetParent(Parent);
}
item.Items.Comparer = this.Comparer;
int treelistviewindex = GetInsertTreeListViewIndex(item, index);
// Insert in the ListView
if (treelistviewindex > -1)
{
ListView listview = (ListView)TreeListView;
listview.Items.Insert(treelistviewindex, (ListViewItem)item);
if (item.IsExpanded)
{
item.Expand();
}
item.SetIndentation();
}
// Insert in this collection
if (index > -1)
{
List.Insert(index, item);
}
if (index > -1)
{
OnItemAdded(new TreeListViewEventArgs(item, TreeListViewAction.Unknown));
}
if (Count == 1 && TreeListView != null && Parent != null)
{
if (Parent.Visible)
{
Parent.Redraw();
}
}
return(index);
}