Refactor for simplicity & modularity

- Write `run_cmd()` to run commands
- Separate command execution from Slint callbacks
- Rename `TimeWidget`'s callback `open_program()` as `show_clock()`

src/widgets.rs

@@ -1,15 +1,20 @@
 use crate::TopBar;
 use slint::ComponentHandle;
-use std::process::Command;
+use std::process::{Child, Command};
+
+// Run a command
+fn run_cmd(cmd: &str) -> Option<Child> {
+    Command::new(cmd).spawn().ok()
+}
 
 /// 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();
+    ui.on_show_clock(move || {
+        if weak.upgrade().is_none() {
+            return;
         }
+        run_cmd("xclock");
     });
 }

ui/time-widget.slint

@@ -1,7 +1,7 @@
 export component TimeWidget {
     in-out property <string> time_text;
 
-    callback open_program();    // Callback to execute things from Rust, because Slint can't
+    callback show_clock();    // Callback to execute things from Rust, because Slint can't
     
     Rectangle {
         background: touch_area.pressed ? #555 : touch_area.has-hover ? #444 : #333; // Bg color based on click & hover  
@@ -21,7 +21,7 @@ export component TimeWidget {
         // Area to sense click and hover
         touch_area:= TouchArea {
             clicked => {
-                open_program();
+                show_clock();
             }
         }
     }

ui/topbar.slint

@@ -5,7 +5,7 @@ export component TopBar inherits Window {
     in property<int> bar_width;
     in property<int> bar_height;
 
-    callback open_program();
+    callback show_clock();
 
     title: "chocobar";
     width: bar_width *1px;
@@ -53,7 +53,7 @@ export component TopBar inherits Window {
 
                     TimeWidget {
                         time_text: "11:43 AM";  // Fix this: Replace with time value
-                        open_program => root.open_program();    // Forward the widget's callback to the root's to access from Rust  
+                        show_clock => root.show_clock();    // Forward the widget's callback to the root's to access from Rust  
                     }
                 }
             }