Set X window type DOCK

widget/Cargo.toml

@@ -11,6 +11,7 @@ toml = "0.9.7"
 dirs = "6.0.0"
 serde_json = "1.0.145"
 slint = "1.14.1"
+i-slint-backend-winit = "1.14.1"
 
 [build-dependencies]
 slint-build = "1.14.1"

widget/src/show_popup.rs

@@ -1,6 +1,14 @@
 use owm_rs::free_api_v25::current::WeatherResponse;
 use owm_widg_config::config::Config;
-use slint::SharedString;
+use slint::{LogicalPosition, LogicalSize, SharedString};
+
+use i_slint_backend_winit::{
+    Backend,
+    winit::{
+        platform::x11::{WindowAttributesExtX11, WindowType},
+        window::WindowAttributes,
+    },
+};
 
 slint::include_modules!();
 
@@ -14,6 +22,20 @@ fn unit_symbol(units: &str) -> char {
 }
 
 pub fn show_popup(resp: &WeatherResponse, cfg: &Config) -> Result<(), Box<dyn std::error::Error>> {
+    // Closure that adjusts winit WindowAttributes before Slint creates the window.
+    let window_attrs = |attrs: WindowAttributes| {
+        // Mark the X11 window as a DOCK so the WM treats it as a top bar/panel.
+        attrs.with_x11_window_type(vec![WindowType::Dock])
+    };
+
+    // Build a Slint backend that applies this attribute hook to all windows.
+    let backend = Backend::builder()
+        .with_window_attributes_hook(window_attrs) // Register the hook
+        .build()?; // Construct backend
+
+    // Activate this customized backend for all Slint window creation and events.
+    slint::platform::set_platform(Box::new(backend))?;
+
     let ui = MainWindow::new()?;
 
     let city = resp.name.clone().unwrap_or_else(|| "Unknown".into());
@@ -41,6 +63,12 @@ pub fn show_popup(resp: &WeatherResponse, cfg: &Config) -> Result<(), Box<dyn st
     ui.set_temperature(SharedString::from(temperature));
     ui.set_unit(SharedString::from(unit_symbol));
 
+    #[allow(clippy::cast_precision_loss)]
+    ui.window().set_size(LogicalSize::new(300.0, 124.0));
+
+    // Position the window (bar) at the top-left.
+    ui.window().set_position(LogicalPosition::new(0.0, 0.0));
+
     ui.run()?;
     Ok(())
 }