internal virtual bool CollapseNode(TreeGridNode node)
{
if (!node.IsExpanded)
{
return(false);
}
CollapsingEventArgs e = new CollapsingEventArgs(node);
this.OnNodeCollapsing(e);
if (!e.Cancel)
{
this.LockVerticalScrollBarUpdate(true);
base.SuspendLayout();
this._inExpandCollapse = true;
node.IsExpanded = false;
foreach (TreeGridNode node2 in node.Nodes)
{
this.UnSiteNode(node2);
}
this.OnNodeCollapsed(node);
this._inExpandCollapse = false;
this.LockVerticalScrollBarUpdate(false);
base.ResumeLayout(true);
base.InvalidateCell(node.Cells[0]);
}
return(!e.Cancel);
}
private void OnNodeCollapsing(CollapsingEventArgs e)
{
this.NodeCollapsing?.Invoke(this, e);
}