Use f32 in Length::Units and rename it to Fixed

core/src/length.rs

@@ -1,5 +1,5 @@
 /// The strategy used to fill space in a specific dimension.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub enum Length {
     /// Fill all the remaining space
     Fill,
@@ -17,7 +17,7 @@ pub enum Length {
     Shrink,
 
     /// Fill a fixed amount of space
-    Units(u16),
+    Fixed(f32),
 }
 
 impl Length {
@@ -31,13 +31,19 @@ impl Length {
             Length::Fill => 1,
             Length::FillPortion(factor) => *factor,
             Length::Shrink => 0,
-            Length::Units(_) => 0,
+            Length::Fixed(_) => 0,
         }
     }
 }
 
+impl From<f32> for Length {
+    fn from(amount: f32) -> Self {
+        Length::Fixed(amount)
+    }
+}
+
 impl From<u16> for Length {
     fn from(units: u16) -> Self {
-        Length::Units(units)
+        Length::Fixed(f32::from(units))
     }
 }

core/src/lib.rs

@@ -35,6 +35,7 @@ mod content_fit;
 mod font;
 mod length;
 mod padding;
+mod pixels;
 mod point;
 mod rectangle;
 mod size;
@@ -47,6 +48,7 @@ pub use content_fit::ContentFit;
 pub use font::Font;
 pub use length::Length;
 pub use padding::Padding;
+pub use pixels::Pixels;
 pub use point::Point;
 pub use rectangle::Rectangle;
 pub use size::Size;

core/src/pixels.rs

@@ -0,0 +1,22 @@
+/// An amount of logical pixels.
+///
+/// Normally used to represent an amount of space, or the size of something.
+///
+/// This type is normally asked as an argument in a generic way
+/// (e.g. `impl Into<Pixels>`) and, since `Pixels` implements `From` both for
+/// `f32` and `u16`, you should be able to provide both integers and float
+/// literals as needed.
+#[derive(Debug, Clone, Copy, PartialEq, PartialOrd)]
+pub struct Pixels(pub f32);
+
+impl From<f32> for Pixels {
+    fn from(amount: f32) -> Self {
+        Self(amount)
+    }
+}
+
+impl From<u16> for Pixels {
+    fn from(amount: u16) -> Self {
+        Self(f32::from(amount))
+    }
+}