void TreeCtrl::SyncTree()
{
	if(!dirty)
		return;
	if(noroot)
		Open(0);
	Ptr<Ctrl> restorefocus = GetFocusChildDeep();
	hasctrls = false;
	int cursorid = GetCursor();
	for(int i = 0; i < item.GetCount(); i++)
		item[i].linei = -1;
	line.Clear();
	Size treesize = Size(0, 0);
	if(noroot) {
		if(GetChildCount(0))
			treesize.cy = -item[0].GetSize().cy;
		ReLine(0, -1, treesize);
	}
	else
		ReLine(0, 0, treesize);
	treesize.cy = max(0, treesize.cy);
	treesize.cx += levelcx;
	sb.SetTotal(treesize);
	cursor = -1;
	dirty = false;
	if(cursorid >= 0)
		SetCursor(cursorid, false, false, false);
	SyncCtrls(true, restorefocus);
	SyncInfo();
}

void TreeCtrl::SetCursorLine(int i, bool sc, bool sel, bool cb)
{
	if(nocursor)
		return;
	if(sel && multiselect) {
		ClearSelection();
		SelectOne(line[i].itemi, true);
	}
	if(i != cursor) {
		i = minmax(i, 0, line.GetCount() - 1);
		if(i < 0) return;
		Item& m = item[line[i].itemi];
		if(sc)
			sb.ScrollIntoY(line[i].y, m.GetSize().cy);
		RefreshLine(cursor);
		cursor = i;
		RefreshLine(cursor);
		if(m.ctrl && m.ctrl->SetWantFocus())
			return;
		if(cb) {
			WhenCursor();
			WhenSel();
		}
	}
}

void TreeCtrl::SetCursor(int id, bool sc, bool sel, bool cb)
{
	while(id > 0) {
		ASSERT(id >= 0 && id < item.GetCount());
		MakeVisible(id);
		SyncTree();
		const Item& m = item[id];
		if(m.linei >= 0) {
			SetCursorLine(m.linei, sc, sel, cb);
			return;
		}
		id = m.parent;
	}
	SetCursorLine(0, sc, sel, cb);
}