Basic full screen window

src/main.rs

@@ -5,10 +5,33 @@ use i_slint_backend_winit::{
         window::WindowAttributes,
     },
 };
+use slint::{LogicalPosition, LogicalSize};
 slint::include_modules!();
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Configure X11 window attributes before Slint creates the window.
+    let window_attrs = |attrs: WindowAttributes| {
+        attrs
+            // Set the window type to Desktop so WMs avoid normal window rules, treat it as a full screen window.
+            .with_x11_window_type(vec![WindowType::Desktop])
+            // Make the window unmanaged. This prevents tiling WMs from reserving space or moving it.
+            .with_override_redirect(true)
+    };
+
+    // Build and activate backend with X11 window-attribute hook.
+    let backend = Backend::builder()
+        .with_window_attributes_hook(window_attrs)
+        .build()?;
+    slint::platform::set_platform(Box::new(backend))?;
+
     let ui = PowerMenu::new()?;
+
+    let screen_width = 1366;
+    let screen_height = 768;
+
+    ui.window().set_size(LogicalSize::new(screen_width as f32, screen_height as f32));
+    ui.window().set_position(LogicalPosition::new(0.0, 0.0));
+
     ui.run();
 
     Ok(())

ui/power-menu.slint

@@ -1,4 +1,7 @@
 export component PowerMenu inherits Window {
+    in property <int> screen-width: 1366;
+    in property <int> screen-height: 768;
+
     background: #adadad57;
     no-frame: true;
 }