clipping for transistions + tab ordering via index + more examples

sys/modules/opus/ui/components/MenuBar.lua

@@ -34,6 +34,15 @@ function UI.MenuBar:addButtons(buttons)
 		self.children = { }
 	end
 
+	for _,button in pairs(buttons) do
+		if button.index then -- don't sort unless needed
+			table.sort(buttons, function(a, b)
+				return (a.index or 999) < (b.index or 999)
+			end)
+			break
+		end
+	end
+
 	for _,button in pairs(buttons) do
 		if button.UIElement then
 			table.insert(self.children, button)