Added chain previous event functionality

src/main.rs

@@ -59,6 +59,7 @@ fn load_log(ui_weak: Weak<AppWindow>, log: Arc<Mutex<Log>>) {
     let model: ModelRc<TimelineEvent> = Rc::new(VecModel::from(events)).into();
     ui.set_record_events(model);
     ui.set_in_progress(in_progress);
+    ui.invoke_get_previous_event();
 }
 
 fn load_colors(ui_weak: Weak<AppWindow>, config: Arc<Config>) {
@@ -229,6 +230,25 @@ fn main() -> Result<(), Box<dyn Error>> {
             ui.invoke_start_new_event(event_name);
         }
     });
+    
+    ui.on_get_previous_event({
+        let ui_weak = ui.as_weak();
+        let log = writing_log.clone();
+        move || {
+            let ui = ui_weak.unwrap();
+            let prev_event_name = {
+                let log_guard = log.lock().expect("Log shouldn't be used twice");
+                let prev_index = log_guard.events.len() - 2;
+                log_guard.events
+                    .get(prev_index)
+                    .expect("Index is already checked")
+                    .name
+                    .clone()
+            };
+            println!("{}", prev_event_name.as_str());
+            ui.set_previous_event_name(prev_event_name.to_shared_string());
+        }
+    });
 
     ui.on_new_day_started({
         let ui_weak = ui.as_weak();
@@ -272,7 +292,10 @@ fn main() -> Result<(), Box<dyn Error>> {
         }
     });
 
+    ui.invoke_get_previous_event();
+
     ui.run()?;
 
+
     Ok(())
 }