Convert Renderer::Theme to generic Widget type

src/application.rs

@@ -139,7 +139,7 @@ pub trait Application: Sized {
     /// Returns the widgets to display in the [`Application`].
     ///
     /// These widgets can produce __messages__ based on user interaction.
-    fn view(&self) -> Element<'_, Self::Message, crate::Renderer<Self::Theme>>;
+    fn view(&self) -> Element<'_, Self::Message, Self::Theme, crate::Renderer>;
 
     /// Returns the current [`Theme`] of the [`Application`].
     ///
@@ -208,7 +208,7 @@ pub trait Application: Sized {
         Ok(crate::shell::application::run::<
             Instance<Self>,
             Self::Executor,
-            crate::renderer::Compositor<Self::Theme>,
+            crate::renderer::Compositor,
         >(settings.into(), renderer_settings)?)
     }
 }
@@ -219,14 +219,15 @@ impl<A> crate::runtime::Program for Instance<A>
 where
     A: Application,
 {
-    type Renderer = crate::Renderer<A::Theme>;
     type Message = A::Message;
+    type Theme = A::Theme;
+    type Renderer = crate::Renderer;
 
     fn update(&mut self, message: Self::Message) -> Command<Self::Message> {
         self.0.update(message)
     }
 
-    fn view(&self) -> Element<'_, Self::Message, Self::Renderer> {
+    fn view(&self) -> Element<'_, Self::Message, Self::Theme, Self::Renderer> {
         self.0.view()
     }
 }

src/lib.rs

@@ -271,8 +271,12 @@ pub mod overlay {
     /// This is an alias of an [`overlay::Element`] with a default `Renderer`.
     ///
     /// [`overlay::Element`]: crate::core::overlay::Element
-    pub type Element<'a, Message, Renderer = crate::Renderer> =
-        crate::core::overlay::Element<'a, Message, Renderer>;
+    pub type Element<
+        'a,
+        Message,
+        Theme = crate::Renderer,
+        Renderer = crate::Renderer,
+    > = crate::core::overlay::Element<'a, Message, Theme, Renderer>;
 
     pub use iced_widget::overlay::*;
 }
@@ -302,19 +306,21 @@ pub use error::Error;
 pub use event::Event;
 pub use executor::Executor;
 pub use font::Font;
+pub use renderer::Renderer;
 pub use sandbox::Sandbox;
 pub use settings::Settings;
 pub use subscription::Subscription;
 pub use theme::Theme;
 
-/// The default renderer.
-pub type Renderer<Theme = style::Theme> = renderer::Renderer<Theme>;
-
 /// A generic widget.
 ///
 /// This is an alias of an `iced_native` element with a default `Renderer`.
-pub type Element<'a, Message, Renderer = crate::Renderer> =
-    crate::core::Element<'a, Message, Renderer>;
+pub type Element<
+    'a,
+    Message,
+    Theme = crate::Theme,
+    Renderer = crate::Renderer,
+> = crate::core::Element<'a, Message, Theme, Renderer>;
 
 /// The result of running an [`Application`].
 ///

src/multi_window/application.rs

@@ -114,7 +114,7 @@ pub trait Application: Sized {
     fn view(
         &self,
         window: window::Id,
-    ) -> Element<'_, Self::Message, crate::Renderer<Self::Theme>>;
+    ) -> Element<'_, Self::Message, Self::Theme, crate::Renderer>;
 
     /// Returns the current [`Theme`] of the `window` of the [`Application`].
     ///
@@ -185,7 +185,7 @@ pub trait Application: Sized {
         Ok(crate::shell::multi_window::run::<
             Instance<Self>,
             Self::Executor,
-            crate::renderer::Compositor<Self::Theme>,
+            crate::renderer::Compositor,
         >(settings.into(), renderer_settings)?)
     }
 }
@@ -196,8 +196,9 @@ impl<A> crate::runtime::multi_window::Program for Instance<A>
 where
     A: Application,
 {
-    type Renderer = crate::Renderer<A::Theme>;
     type Message = A::Message;
+    type Theme = A::Theme;
+    type Renderer = crate::Renderer;
 
     fn update(&mut self, message: Self::Message) -> Command<Self::Message> {
         self.0.update(message)
@@ -206,7 +207,7 @@ where
     fn view(
         &self,
         window: window::Id,
-    ) -> Element<'_, Self::Message, Self::Renderer> {
+    ) -> Element<'_, Self::Message, Self::Theme, Self::Renderer> {
         self.0.view(window)
     }
 }