sizing actually working correctly now

src/core/pad.rs

@@ -0,0 +1,51 @@
+use crate::prelude::*;
+
+pub struct Padded {
+    pub padding: Padding,
+    pub inner: WidgetId,
+}
+
+impl Widget for Padded {
+    fn draw(&mut self, painter: &mut Painter) {
+        painter.widget_within(&self.inner, self.padding.region());
+    }
+
+    fn desired_size(&mut self, ctx: &mut SizeCtx) -> UiVec2 {
+        let mut size = ctx.size(&self.inner);
+        size.abs.x += self.padding.left + self.padding.right;
+        size.abs.y += self.padding.top + self.padding.bottom;
+        size
+    }
+}
+
+pub struct Padding {
+    left: f32,
+    right: f32,
+    top: f32,
+    bottom: f32,
+}
+
+impl Padding {
+    pub fn uniform(amt: f32) -> Self {
+        Self {
+            left: amt,
+            right: amt,
+            top: amt,
+            bottom: amt,
+        }
+    }
+    pub fn region(&self) -> UiRegion {
+        let mut region = UiRegion::full();
+        region.top_left.abs.x += self.left;
+        region.top_left.abs.y += self.top;
+        region.bot_right.abs.x -= self.right;
+        region.bot_right.abs.y -= self.bottom;
+        region
+    }
+}
+
+impl<T: UiNum> From<T> for Padding {
+    fn from(amt: T) -> Self {
+        Self::uniform(amt.to_f32())
+    }
+}