spans now good (other than direction) + refactor

src/layout/mod.rs

@@ -1,8 +1,15 @@
+mod color;
+mod painter;
+mod region;
 mod ui;
+mod vec2;
 mod widget;
 
+pub use color::*;
+pub use region::*;
 pub use ui::*;
+pub use vec2::*;
 pub use widget::*;
+pub use painter::*;
 
-use crate::primitive::Color;
 pub type UIColor = Color<u8>;