How to navigate through menus? (Such as Inventory, Settings, Etc.)

[ImMac 0]

I know its something to do with Widgets but I'm not entirely sure how I navigate through them, could someone please help me? I just want to be able to click various things in the interfaces that pop up.

 

[ImMac 0]

Figured it out

 

if (Widgets.getWidget(116) != null) {
				Widgets.getWidget(116).getChild(75).interact();
			}