Move callbacks to separate module

- Modularity
- Redability
- Separation of logic

src/main.rs

@@ -6,6 +6,7 @@ use i_slint_backend_winit::{
     },
 };
 use slint::{LogicalPosition, LogicalSize};
+mod widgets;
 slint::include_modules!();
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
@@ -33,13 +34,9 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     ui.set_bar_width(bar_width);
     ui.set_bar_height(bar_height);
 
-    let weak = ui.as_weak();
-    ui.on_open_program(move || {
-        if let Some(_ui) = weak.upgrade() {
-            // Launch a program on click
-            std::process::Command::new("xclock").spawn().ok();
-        }
-    });
+    // Install all widget callbacks
+    widgets::install_callbacks(&ui);
+
     // Size the window to match the bar.
     #[allow(clippy::cast_precision_loss)]
     ui.window()

src/widgets.rs

@@ -0,0 +1,15 @@
+use crate::TopBar;
+use slint::ComponentHandle;
+use std::process::Command;
+
+/// Connect widget callbacks for the top bar.
+pub fn install_callbacks(ui: &TopBar) {
+    let weak = ui.as_weak();
+
+    ui.on_open_program(move || {
+        if weak.upgrade().is_some() {
+            // Run program on click
+            Command::new("xclock").spawn().ok();
+        }
+    });
+}