Detect screen size at runtime

- For x11 only

Cargo.toml

@@ -10,6 +10,7 @@ i-slint-backend-winit = { version = "1.14.1", default-features = false, features
 serde = { version = "1.0.228", default-features = false, features = ["derive"] }
 slint = { version = "1.14.1", default-features = false, features = ["backend-winit", "compat-1-2", "renderer-software"] }
 toml = "0.9.11"
+x11rb = { version = "0.13.2", default-features = false }
 
 [build-dependencies]
 slint-build = "1.14.1"

src/main.rs

@@ -8,6 +8,7 @@ use i_slint_backend_winit::{
 
 mod config;
 mod powermenu;
+mod x11_helpers;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Configure X11 window attributes before Slint creates the window.
@@ -23,13 +24,14 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let backend = Backend::builder()
         .with_window_attributes_hook(window_attrs)
         .build()?;
-
     slint::platform::set_platform(Box::new(backend))?;
 
-    let screen_width = 1366;
-    let screen_height = 768;
+    // Get screen dimensions
+    let (screen_width, screen_height) = x11_helpers::get_screen_size().unwrap_or((1366, 768));
 
+    // Load config
     let conf = config::load_config(screen_width, screen_height)?;
 
+    // Run the UI
     powermenu::run_power_menu(conf)
 }

src/x11_helpers.rs

@@ -0,0 +1,11 @@
+use x11rb::{connection::Connection, rust_connection::RustConnection};
+
+pub fn get_screen_size() -> Result<(i32, i32), Box<dyn std::error::Error>> {
+    let (conn, screen_num) = RustConnection::connect(None)?;
+    let screen = &conn.setup().roots[screen_num];
+
+    Ok((
+        screen.width_in_pixels as i32,
+        screen.height_in_pixels as i32,
+    ))
+}