Modularize the widegets module

- Divide into sub-modules
- Seperate the logic of different widgets
- Better readability and maintainability

src/widgets/common.rs

@@ -0,0 +1,6 @@
+use std::process::{Child, Command};
+
+// Run a shell command without blocking
+pub fn run_cmd(cmd: &str) -> Option<Child> {
+    Command::new(cmd).spawn().ok()
+}

src/widgets/mod.rs

@@ -0,0 +1,13 @@
+mod common;
+mod timewidget;
+
+use crate::TopBar;
+
+pub fn install_callbacks(ui: &TopBar) {
+    timewidget::install(ui);
+
+    // In the future:
+    // datewidget::install(ui);
+    // networkwidget::install(ui);
+    // batterywidget::install(ui);
+}

src/widgets/timewidget.rs

@@ -1,13 +1,9 @@
 use crate::TopBar;
 use chrono::{Local, Timelike};
 use slint::{ComponentHandle, SharedString, Timer, TimerMode};
-use std::process::{Child, Command};
 use std::time::Duration;
 
-// Run a shell command without blocking
-fn run_cmd(cmd: &str) -> Option<Child> {
-    Command::new(cmd).spawn().ok()
-}
+use super::common::run_cmd;
 
 // Format current time as "hh:mm AM"
 fn format_time() -> SharedString {
@@ -27,24 +23,18 @@ fn time_until_next_minute() -> Duration {
 fn start_clock_updater(ui: &TopBar) {
     let weak = ui.as_weak();
 
-    // One-shot: waits until the next round minute
     let initial_timer = Box::leak(Box::new(Timer::default()));
-
-    // Repeating: runs every 60 seconds after that
     let repeating_timer = Box::leak(Box::new(Timer::default()));
 
-    // Set the time immediately when the bar starts
     if let Some(ui) = weak.upgrade() {
         ui.set_time_text(format_time());
     }
 
-    // Wait until the next minute boundary
     initial_timer.start(TimerMode::SingleShot, time_until_next_minute(), move || {
         if let Some(ui) = weak.upgrade() {
             ui.set_time_text(format_time());
         }
 
-        // Then update every 60 seconds
         let weak_clone = weak.clone();
         repeating_timer.start(TimerMode::Repeated, Duration::from_secs(60), move || {
             if let Some(ui) = weak_clone.upgrade() {
@@ -54,17 +44,15 @@ fn start_clock_updater(ui: &TopBar) {
     });
 }
 
-// Connect widget callbacks and start the clock
-pub fn install_callbacks(ui: &TopBar) {
+// Public entry for this widget
+pub fn install(ui: &TopBar) {
     let weak = ui.as_weak();
 
-    // Run xclock when the widget emits show_clock()
     ui.on_show_clock(move || {
         if weak.upgrade().is_some() {
             run_cmd("xclock");
         }
     });
 
-    // Start the clock updater
     start_clock_updater(ui);
 }