better rgba

simu/src/main.rs

@@ -21,7 +21,6 @@ use winit::application::ApplicationHandler;
 use winit::dpi::LogicalSize;
 use winit::event::WindowEvent;
 use winit::event_loop::EventLoop;
-use winit::platform::modifier_supplement::KeyEventExtModifierSupplement;
 use winit::platform::scancode::PhysicalKeyExtScancode;
 use winit::window::Window;
 
@@ -59,7 +58,8 @@ impl<'a> ApplicationHandler for App<'a> {
                         Window::default_attributes()
                             .with_title("bisare screen")
                             .with_min_inner_size(size)
-                            .with_maximized(true),
+                            .with_maximized(true)
+                            .with_transparent(true),
                     )
                     .unwrap(),
             )
@@ -92,6 +92,7 @@ impl<'a> ApplicationHandler for App<'a> {
                 print!("Keyboard event: ");
                 #[cfg(feature = "rich_keyboard")]
                 {
+                    use winit::platform::modifier_supplement::KeyEventExtModifierSupplement;
                     let kb0 = key_event.text_with_all_modifiers().map_or(u32::MAX, |s| {
                         s.as_bytes()
                             .into_iter()