Show name of current Theme in clock example

core/src/angle.rs

@@ -7,6 +7,18 @@ use std::ops::{Add, AddAssign, Div, Mul, RangeInclusive, Sub, SubAssign};
 #[derive(Debug, Copy, Clone, PartialEq, PartialOrd)]
 pub struct Degrees(pub f32);
 
+impl PartialEq<f32> for Degrees {
+    fn eq(&self, other: &f32) -> bool {
+        self.0.eq(other)
+    }
+}
+
+impl PartialOrd<f32> for Degrees {
+    fn partial_cmp(&self, other: &f32) -> Option<std::cmp::Ordering> {
+        self.0.partial_cmp(other)
+    }
+}
+
 /// Radians
 #[derive(Debug, Copy, Clone, PartialEq, PartialOrd)]
 pub struct Radians(pub f32);
@@ -140,3 +152,15 @@ impl Div for Radians {
         Self(self.0 / rhs.0)
     }
 }
+
+impl PartialEq<f32> for Radians {
+    fn eq(&self, other: &f32) -> bool {
+        self.0.eq(other)
+    }
+}
+
+impl PartialOrd<f32> for Radians {
+    fn partial_cmp(&self, other: &f32) -> Option<std::cmp::Ordering> {
+        self.0.partial_cmp(other)
+    }
+}

examples/clock/src/main.rs

@@ -1,8 +1,10 @@
+use iced::alignment;
 use iced::mouse;
 use iced::widget::canvas::{stroke, Cache, Geometry, LineCap, Path, Stroke};
 use iced::widget::{canvas, container};
 use iced::{
-    Element, Length, Point, Rectangle, Renderer, Subscription, Theme, Vector,
+    Degrees, Element, Font, Length, Point, Rectangle, Renderer, Subscription,
+    Theme, Vector,
 };
 
 pub fn main() -> iced::Result {
@@ -133,8 +135,31 @@ impl<Message> canvas::Program<Message> for Clock {
             });
 
             frame.with_save(|frame| {
-                frame.rotate(hand_rotation(self.now.second(), 60));
+                let rotation = hand_rotation(self.now.second(), 60);
+
+                frame.rotate(rotation);
                 frame.stroke(&long_hand, thin_stroke());
+
+                let rotate_factor = if rotation < 180.0 { 1.0 } else { -1.0 };
+
+                frame.rotate(Degrees(-90.0 * rotate_factor));
+                frame.fill_text(canvas::Text {
+                    content: theme.to_string(),
+                    size: 15.into(),
+                    position: Point::new(
+                        (0.8 * radius - 8.0) * rotate_factor,
+                        -8.0,
+                    ),
+                    color: palette.primary.weak.text,
+                    horizontal_alignment: if rotate_factor > 0.0 {
+                        alignment::Horizontal::Right
+                    } else {
+                        alignment::Horizontal::Left
+                    },
+                    vertical_alignment: alignment::Vertical::Bottom,
+                    font: Font::MONOSPACE,
+                    ..canvas::Text::default()
+                });
             });
         });
 
@@ -142,8 +167,8 @@ impl<Message> canvas::Program<Message> for Clock {
     }
 }
 
-fn hand_rotation(n: u8, total: u8) -> f32 {
+fn hand_rotation(n: u8, total: u8) -> Degrees {
     let turns = n as f32 / total as f32;
 
-    2.0 * std::f32::consts::PI * turns
+    Degrees(360.0 * turns)
 }

renderer/src/geometry.rs

@@ -2,7 +2,7 @@ mod cache;
 
 pub use cache::Cache;
 
-use crate::core::{Point, Rectangle, Size, Transformation, Vector};
+use crate::core::{Point, Radians, Rectangle, Size, Transformation, Vector};
 use crate::graphics::geometry::{Fill, Path, Stroke, Text};
 use crate::Renderer;
 
@@ -184,7 +184,7 @@ impl Frame {
 
     /// Applies a rotation in radians to the current transform of the [`Frame`].
     #[inline]
-    pub fn rotate(&mut self, angle: f32) {
+    pub fn rotate(&mut self, angle: impl Into<Radians>) {
         delegate!(self, frame, frame.rotate(angle));
     }
 

tiny_skia/src/geometry.rs

@@ -1,5 +1,7 @@
 use crate::core::text::LineHeight;
-use crate::core::{Pixels, Point, Rectangle, Size, Transformation, Vector};
+use crate::core::{
+    Pixels, Point, Radians, Rectangle, Size, Transformation, Vector,
+};
 use crate::graphics::geometry::fill::{self, Fill};
 use crate::graphics::geometry::stroke::{self, Stroke};
 use crate::graphics::geometry::{Path, Style, Text};
@@ -192,10 +194,10 @@ impl Frame {
             self.transform.pre_translate(translation.x, translation.y);
     }
 
-    pub fn rotate(&mut self, angle: f32) {
-        self.transform = self
-            .transform
-            .pre_concat(tiny_skia::Transform::from_rotate(angle.to_degrees()));
+    pub fn rotate(&mut self, angle: impl Into<Radians>) {
+        self.transform = self.transform.pre_concat(
+            tiny_skia::Transform::from_rotate(angle.into().0.to_degrees()),
+        );
     }
 
     pub fn scale(&mut self, scale: impl Into<f32>) {

wgpu/src/geometry.rs

@@ -1,6 +1,8 @@
 //! Build and draw geometry.
 use crate::core::text::LineHeight;
-use crate::core::{Pixels, Point, Rectangle, Size, Transformation, Vector};
+use crate::core::{
+    Pixels, Point, Radians, Rectangle, Size, Transformation, Vector,
+};
 use crate::graphics::color;
 use crate::graphics::geometry::fill::{self, Fill};
 use crate::graphics::geometry::{
@@ -475,12 +477,12 @@ impl Frame {
 
     /// Applies a rotation in radians to the current transform of the [`Frame`].
     #[inline]
-    pub fn rotate(&mut self, angle: f32) {
+    pub fn rotate(&mut self, angle: impl Into<Radians>) {
         self.transforms.current.0 = self
             .transforms
             .current
             .0
-            .pre_rotate(lyon::math::Angle::radians(angle));
+            .pre_rotate(lyon::math::Angle::radians(angle.into().0));
     }
 
     /// Applies a uniform scaling to the current transform of the [`Frame`].