/// <summary>
/// Expand
/// </summary>
public void Expand()
{
// The item wasn't expanded -> raise an event
if (Visible && !_isexpanded && ListView != null)
{
TreeListViewCancelEventArgs e = new TreeListViewCancelEventArgs(
this, TreeListViewAction.Expand);
ListView.RaiseBeforeExpand(e);
if (e.Cancel)
{
return;
}
}
if (this.Visible)
{
Items.ReadWriteLock.AcquireReaderLock(-1);
for (int i = Items.Count - 1; i >= 0; i--)
{
TreeListViewItem item = this.Items[i];
if (!item.Visible)
{
ListView LView = this.ListView;
LView.Items.Insert(
this.Index + 1,
item);
item.SetIndentation();
}
if (item.IsExpanded)
{
item.Expand();
}
}
Items.ReadWriteLock.ReleaseReaderLock();
}
// The item wasn't expanded -> raise an event
if (Visible && !_isexpanded && ListView != null)
{
this._isexpanded = true;
TreeListViewEventArgs e = new TreeListViewEventArgs(
this, TreeListViewAction.Expand);
ListView.RaiseAfterExpand(e);
if (AfterExpand != null)
{
AfterExpand(this);
}
}
this._isexpanded = true;
}
/// <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)
{
int index = GetInsertCollectionIndex(item);
if (index == -1)
{
return(-1);
}
if (Parent != null)
{
item.SetParent(Parent);
}
item.Items.Comparer = this.Comparer;
ReadWriteLock.AcquireWriterLock(-1);
int treelistviewindex = GetInsertTreeListViewIndex(item);
// Insert in the ListView
if (treelistviewindex > -1)
{
ListView listview = (ListView)TreeListView;
InsertListViewItem insert = new InsertListViewItem(listview.Items.Insert);
if (listview.InvokeRequired)
{
listview.Invoke(insert, new object[] { treelistviewindex, (ListViewItem)item });
}
else
{
listview.Items.Insert(treelistviewindex, (ListViewItem)item);
}
if (item.IsExpanded)
{
item.Expand();
}
item.SetIndentation();
}
// Insert in this collection
if (index > -1)
{
List.Insert(index, item);
}
ReadWriteLock.ReleaseWriterLock();
return(index);
}
