sized widgets!

src/layout/orientation.rs

@@ -1,3 +1,5 @@
+use std::ops::Not;
+
 use crate::layout::{Vec2, vec2};
 
 #[derive(Clone, Copy, Debug)]
@@ -25,6 +27,17 @@ pub enum Axis {
     Y,
 }
 
+impl Not for Axis {
+    type Output = Self;
+
+    fn not(self) -> Self::Output {
+        match self {
+            Self::X => Self::Y,
+            Self::Y => Self::X,
+        }
+    }
+}
+
 #[derive(Clone, Copy, Eq, PartialEq)]
 pub struct Dir {
     pub axis: Axis,
@@ -47,3 +60,19 @@ pub enum Sign {
     Neg,
     Pos,
 }
+
+impl Vec2 {
+    pub fn axis(&self, axis: Axis) -> f32 {
+        match axis {
+            Axis::X => self.x,
+            Axis::Y => self.y,
+        }
+    }
+
+    pub fn axis_mut(&mut self, axis: Axis) -> &mut f32 {
+        match axis {
+            Axis::X => &mut self.x,
+            Axis::Y => &mut self.y,
+        }
+    }
+}