Fixing scrollbar view content

src/ui/app.rs

@@ -178,17 +178,21 @@ impl App {
             return;
         }
 
+        let max_scroll = state
+            .get_total_lenght()
+            .saturating_sub(area[0].height as usize)
+            .saturating_add(1);
+
+        state.scroll_state = state
+            .scroll_state
+            .content_length(max_scroll.max(1))
+            .viewport_content_length(area[0].height as usize);
+
         let scrollbar = Scrollbar::new(ScrollbarOrientation::VerticalRight)
             .begin_symbol(Some("↑"))
             .end_symbol(Some("↓"));
 
-        frame.render_stateful_widget(
+        frame.render_stateful_widget(scrollbar, area[1], &mut state.scroll_state);
-            scrollbar,
-            area[1],
-            &mut state
-                .scroll_state
-                .viewport_content_length(area[0].height as usize),
-        );
     }
 
     fn handle_events(&mut self) -> io::Result<()> {

src/ui/components/monitor_list.rs

@@ -18,10 +18,10 @@ const MAX_NAME_LENGTH: usize = 30;
 
 pub fn render_monitor_list(main_frame: &mut Frame, area: Rect, state: &mut DashboardViewState) {
     let available_height = area.height as usize;
-    let total_lenght = state.get_total_lenght();
+    let max_scroll = state.get_total_lenght().saturating_sub(available_height);
 
-    if (state.scroll_state.get_position() + available_height) > total_lenght {
+    if state.scroll_state.get_position() > max_scroll {
-        state.scroll_state = state.scroll_state.position(total_lenght - available_height);
+        state.scroll_state = state.scroll_state.position(max_scroll);
     }
 
     let scroll_pos = state.scroll_state.get_position();