private void AddFromProperty()
{
From = AddUIComponent <MarkupLineSelectPropertyPanel>();
From.Text = NodeMarkup.Localize.LineEditor_From;
From.Position = RulePosition.Start;
From.Init();
From.AddRange(Editor.SupportPoints);
From.SelectedObject = Rule.From;
From.OnSelectChanged += FromChanged;
From.OnSelect += ((panel) => Editor.SelectRuleEdge(panel));
From.OnHover += Editor.HoverRuleEdge;
From.OnLeave += Editor.LeaveRuleEdge;
}