private void Expand(bool byInternal)
{
if (is_expanded || nodes.Count < 1)
{
is_expanded = true;
return;
}
bool cancel = false;
TreeView tree_view = TreeView;
if (tree_view != null)
{
TreeViewCancelEventArgs e = new TreeViewCancelEventArgs(this, false, TreeViewAction.Expand);
tree_view.OnBeforeExpand(e);
cancel = e.Cancel;
}
if (!cancel)
{
is_expanded = true;
int count_to_next = CountToNext();
if (tree_view != null)
{
tree_view.OnAfterExpand(new TreeViewEventArgs(this));
tree_view.RecalculateVisibleOrder(this);
tree_view.UpdateScrollBars(false);
// ExpandBelow if we affect the visible area
if (visible_order < tree_view.skipped_nodes + tree_view.VisibleCount + 1 && ArePreviousNodesExpanded)
{
tree_view.ExpandBelow(this, count_to_next);
}
}
}
}
