improv: expose set_blur

runtime/src/window.rs

@@ -159,6 +159,9 @@ pub enum Action {
     /// This enables mouse events for the window and stops mouse events
     /// from being passed to whatever is underneath.
     DisableMousePassthrough(Id),
+
+    /// Set window blur.
+    SetBlur(bool),
 }
 
 /// Subscribes to the frames of the window of the running application.
@@ -456,3 +459,10 @@ pub fn enable_mouse_passthrough<Message>(id: Id) -> Task<Message> {
 pub fn disable_mouse_passthrough<Message>(id: Id) -> Task<Message> {
     task::effect(crate::Action::Window(Action::DisableMousePassthrough(id)))
 }
+
+/// Sets the blur effect for the window.
+///
+/// This is only supported on platforms that support window blur.
+pub fn set_blur<Message>(enable: bool) -> Task<Message> {
+    task::effect(crate::Action::Window(Action::SetBlur(enable)))
+}

winit/src/program.rs

@@ -2202,6 +2202,11 @@ fn run_action<P, C>(
                     let _ = window.raw.set_cursor_hittest(true);
                 }
             }
+            window::Action::SetBlur(enable) => {
+                if let Some(window) = window_manager.get_mut(0) {
+                    window.raw.set_blur(enable);
+                }
+            }
         },
         Action::System(action) => match action {
             system::Action::QueryInformation(_channel) => {