Do secondly refresh via a calloop Timer instead of measuring elapsed time

src/main.rs

@@ -3,7 +3,7 @@ extern crate smithay_client_toolkit as sctk;
 use std::fmt;
 use std::fs;
 
-use calloop::{timer::{Timer, TimerHandle}, EventLoop};
+use calloop::{timer::Timer, EventLoop};
 use chrono::prelude::{Local, Utc};
 use chrono::TimeZone;
 use chrono::Timelike;
@@ -685,20 +685,25 @@ fn main() {
     let timer_handle = source.handle();
     timer_handle.add_timeout(std::time::Duration::from_secs(1), "");
 
-    handle.insert_source(source, |_, timer_handle, _| {
+    handle
-        println!("Redraw!");
+        .insert_source(source, |_, timer_handle, event| {
-        redraw(&mut pool, window.surface(), dimensions).expect("Failed to draw");
-        window.refresh();
             timer_handle.add_timeout(std::time::Duration::from_secs(1), "");
-    });
+            if event.is_none() {
+                *event = Some(sctk::window::Event::Refresh);
+            }
+        })
+        .unwrap();
 
-    sctk::WaylandSource::new(queue).quick_insert(handle).unwrap();
+    sctk::WaylandSource::new(queue)
+        .quick_insert(handle)
+        .unwrap();
 
     loop {
         // Update every second
         match next_action.take() {
             Some(WEvent::Close) => break,
             Some(WEvent::Refresh) => {
+                redraw(&mut pool, window.surface(), dimensions, &config).expect("Failed to draw");
                 window.refresh();
                 window.surface().commit();
             }