Merge pull request #2861 from tigerros/master

Add `ratio` method to `Size`

Author: hecrj

core/src/size.rs

@@ -52,7 +52,7 @@ impl Size {
         }
     }
 
-    /// Rotates the given [`Size`] and returns the minimum [`Size`]
+    /// Rotates this [`Size`] and returns the minimum [`Size`]
     /// containing it.
     pub fn rotate(self, rotation: Radians) -> Size {
         let radians = f32::from(rotation);
@@ -64,6 +64,15 @@ impl Size {
                 + (self.height * radians.cos()).abs(),
         }
     }
+
+    /// Applies an aspect ratio to this [`Size`] without
+    /// exceeding its bounds.
+    pub const fn ratio(self, aspect_ratio: f32) -> Size {
+        Size {
+            width: (self.height * aspect_ratio).min(self.width),
+            height: (self.width / aspect_ratio).min(self.height),
+        }
+    }
 }
 
 impl Size<Length> {

examples/layout/Cargo.toml

@@ -6,4 +6,4 @@ edition = "2024"
 publish = false
 
 [dependencies]
-iced = { path = "../..", features = ["canvas"] }
+iced = { path = "../..", features = ["canvas", "debug"] }

examples/layout/src/main.rs

@@ -3,7 +3,7 @@ use iced::keyboard;
 use iced::mouse;
 use iced::widget::{
     button, canvas, center, center_y, checkbox, column, container, pick_list,
-    pin, row, rule, scrollable, space, stack, text,
+    pin, responsive, row, rule, scrollable, space, stack, text,
 };
 use iced::{
     Center, Element, Fill, Font, Length, Point, Rectangle, Renderer, Shrink,
@@ -153,6 +153,10 @@ impl Example {
             title: "Pinning",
             view: pinning,
         },
+        Self {
+            title: "Responsive",
+            view: responsive_,
+        },
     ];
 
     fn is_first(self) -> bool {
@@ -333,6 +337,42 @@ fn pinning<'a>() -> Element<'a, Message> {
     .into()
 }
 
+fn responsive_<'a>() -> Element<'a, Message> {
+    column![
+        responsive(|size| {
+            container(center(
+                text!("{}x{}px", size.width, size.width).font(Font::MONOSPACE),
+            ))
+            .clip(true)
+            .width(size.width / 4.0)
+            .height(size.width / 4.0)
+            .style(container::bordered_box)
+            .into()
+        })
+        .width(Shrink)
+        .height(Shrink),
+        responsive(|size| {
+            let size = size.ratio(16.0 / 9.0);
+
+            container(center(
+                text!("{:.0}x{:.0}px (16:9)", size.width, size.height)
+                    .font(Font::MONOSPACE),
+            ))
+            .clip(true)
+            .width(size.width)
+            .height(size.height)
+            .style(container::bordered_box)
+            .into()
+        })
+        .width(Shrink)
+        .height(Shrink)
+    ]
+    .align_x(Center)
+    .spacing(10)
+    .padding(10)
+    .into()
+}
+
 fn square<'a>(size: impl Into<Length> + Copy) -> Element<'a, Message> {
     struct Square;