cleanup code and examples

packages/tui/src/lib.rs

@@ -1,5 +1,6 @@
 use anyhow::Result;
 use crossterm::{
+    cursor::{MoveTo, RestorePosition, SavePosition, Show},
     event::{DisableMouseCapture, EnableMouseCapture, Event as TermEvent, KeyCode, KeyModifiers},
     execute,
     terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
@@ -45,6 +46,10 @@ pub(crate) fn screen_to_layout_space(screen: u16) -> f32 {
     screen as f32 * 10.0
 }
 
+pub(crate) fn unit_to_layout_space(screen: f32) -> f32 {
+    screen * 10.0
+}
+
 pub(crate) fn layout_to_screen_space(layout: f32) -> f32 {
     layout / 10.0
 }
@@ -138,7 +143,13 @@ fn render_vdom(
             let mut terminal = (!cfg.headless).then(|| {
                 enable_raw_mode().unwrap();
                 let mut stdout = std::io::stdout();
-                execute!(stdout, EnterAlternateScreen, EnableMouseCapture).unwrap();
+                execute!(
+                    stdout,
+                    EnterAlternateScreen,
+                    EnableMouseCapture,
+                    MoveTo(0, 1000)
+                )
+                .unwrap();
                 let backend = CrosstermBackend::new(io::stdout());
                 Terminal::new(backend).unwrap()
             });
@@ -183,14 +194,16 @@ fn render_vdom(
                         taffy.compute_layout(root_node, size).unwrap();
                     }
                     if let Some(terminal) = &mut terminal {
+                        execute!(terminal.backend_mut(), SavePosition).unwrap();
                         terminal.draw(|frame| {
                             let rdom = rdom.borrow();
                             let mut taffy = taffy.lock().expect("taffy lock poisoned");
                             // size is guaranteed to not change when rendering
-                            resize(frame.size(), &mut *taffy, &rdom);
+                            resize(frame.size(), &mut taffy, &rdom);
                             let root = &rdom[NodeId(0)];
-                            render::render_vnode(frame, &*taffy, &rdom, root, cfg, Point::ZERO);
+                            render::render_vnode(frame, &taffy, &rdom, root, cfg, Point::ZERO);
                         })?;
+                        execute!(terminal.backend_mut(), RestorePosition, Show).unwrap();
                     } else {
                         let rdom = rdom.borrow();
                         resize(