1 files changed, 20 insertions, 12 deletions

diff --git a/src/application.rs b/src/application.rs
index 87c2607a..be0fa0de 100644
--- a/src/application.rs
+++ b/src/application.rs
@@ -1,7 +1,9 @@
 //! Build interactive cross-platform applications.
 use crate::{Command, Element, Executor, Settings, Subscription};
 
-pub use crate::style::application::{Appearance, StyleSheet};
+use crate::shell::application;
+
+pub use application::{default, Appearance, DefaultStyle};
 
 /// An interactive cross-platform application.
 ///
@@ -91,7 +93,10 @@ pub use crate::style::application::{Appearance, StyleSheet};
 ///     }
 /// }
 /// ```
-pub trait Application: Sized {
+pub trait Application: Sized
+where
+    Self::Theme: DefaultStyle,
+{
     /// The [`Executor`] that will run commands and subscriptions.
     ///
     /// The [default executor] can be a good starting point!
@@ -104,7 +109,7 @@ pub trait Application: Sized {
     type Message: std::fmt::Debug + Send;
 
     /// The theme of your [`Application`].
-    type Theme: Default + StyleSheet;
+    type Theme: Default;
 
     /// The data needed to initialize your [`Application`].
     type Flags;
@@ -148,11 +153,9 @@ pub trait Application: Sized {
         Self::Theme::default()
     }
 
-    /// Returns the current `Style` of the [`Theme`].
-    ///
-    /// [`Theme`]: Self::Theme
-    fn style(&self) -> <Self::Theme as StyleSheet>::Style {
-        <Self::Theme as StyleSheet>::Style::default()
+    /// Returns the current [`Appearance`] of the [`Application`].
+    fn style(&self, theme: &Self::Theme) -> Appearance {
+        theme.default_style()
     }
 
     /// Returns the event [`Subscription`] for the current state of the
@@ -228,11 +231,15 @@ pub trait Application: Sized {
     }
 }
 
-struct Instance<A: Application>(A);
+struct Instance<A>(A)
+where
+    A: Application,
+    A::Theme: DefaultStyle;
 
 impl<A> crate::runtime::Program for Instance<A>
 where
     A: Application,
+    A::Theme: DefaultStyle,
 {
     type Message = A::Message;
     type Theme = A::Theme;
@@ -247,9 +254,10 @@ where
     }
 }
 
-impl<A> crate::shell::Application for Instance<A>
+impl<A> application::Application for Instance<A>
 where
     A: Application,
+    A::Theme: DefaultStyle,
 {
     type Flags = A::Flags;
 
@@ -267,8 +275,8 @@ where
         self.0.theme()
     }
 
-    fn style(&self) -> <A::Theme as StyleSheet>::Style {
-        self.0.style()
+    fn style(&self, theme: &A::Theme) -> Appearance {
+        self.0.style(theme)
     }
 
     fn subscription(&self) -> Subscription<Self::Message> {