protected virtual void OnNodeExpanding(ExpandingEventArgs e)
{
if (this.NodeExpanding != null)
{
this.NodeExpanding(this, e);
}
}
protected internal virtual bool ExpandNode(TreeGridNode node)
{
if (!node.IsExpanded || this._virtualNodes)
{
ExpandingEventArgs e = new ExpandingEventArgs(node);
this.OnNodeExpanding(e);
if (!e.Cancel)
{
this.LockVerticalScrollBarUpdate(true);
base.SuspendLayout();
this._inExpandCollapse = true;
node.IsExpanded = true;
foreach (TreeGridNode node2 in node.Nodes)
{
this.SiteNode(node2);
}
ExpandedEventArgs args2 = new ExpandedEventArgs(node);
this.OnNodeExpanded(args2);
this._inExpandCollapse = false;
this.LockVerticalScrollBarUpdate(false);
base.ResumeLayout(true);
}
return(!e.Cancel);
}
return(false);
}