map: simple box that quits with q

bin/map/src/main.rs

@@ -1,31 +1,62 @@
-// tui that lists:
-//      all active nodes
-//      their connections
-//      recent messages
-//
-// uses rpc to get that info from nodes
-//
-// later: can open nodes in tabs
-
-use drk::{
-    tui::{App, HBox, VBox, Widget},
-    Result,
+use rand::{thread_rng, Rng};
+use std::{io, io::Read, time::Instant};
+use termion::{async_stdin, event::Key, input::TermRead, raw::IntoRawMode};
+use tui::{
+    backend::TermionBackend,
+    layout::{Constraint, Direction, Layout},
+    style::{Color, Style},
+    text::Spans,
+    widgets::{Block, Borders, Paragraph},
+    Terminal,
 };
 
-async fn start() -> Result<()> {
-    let wv1 = vec![Widget::new("Active nodes".into())?];
-
-    let v_box1 = Box::new(VBox::new(wv1.clone(), 1));
-
-    let mut app = App::new()?;
-
-    app.add_layout(v_box1)?;
-
-    app.run().await?;
-
-    Ok(())
-}
-
-fn main() -> Result<()> {
-    smol::future::block_on(start())
+fn main() -> Result<(), io::Error> {
+    // Set up terminal output
+    let stdout = io::stdout().into_raw_mode()?;
+    let backend = TermionBackend::new(stdout);
+    let mut terminal = Terminal::new(backend)?;
+
+    // Create a separate thread to poll stdin.
+    // This provides non-blocking input support.
+    let mut asi = async_stdin();
+
+    let mut then = Instant::now();
+    let mut rng = thread_rng();
+    // Clear the terminal before first draw.
+    terminal.clear()?;
+    loop {
+        // Lock the terminal and start a drawing session.
+        terminal.draw(|frame| {
+            // Create a layout into which to place our blocks.
+            let size = frame.size();
+
+            // The text lines for our text box.
+            let txt = vec![Spans::from("\n Press q to quit.\n")];
+            // Create a paragraph with the above text...
+            let graph = Paragraph::new(txt)
+                // In a block with borders and the given title...
+                .block(Block::default().title("List of active nodes").borders(Borders::ALL))
+                // With white foreground and black background...
+                .style(Style::default().fg(Color::White).bg(Color::Black));
+
+            // Render into the second chunk of the layout.
+            frame.render_widget(graph, size);
+        })?;
+
+        // Iterate over all the keys that have been pressed since the
+        // last time we checked.
+        for k in asi.by_ref().keys() {
+            match k.unwrap() {
+                // If any of them is q, quit
+                Key::Char('q') => {
+                    // Clear the terminal before exit so as not to leave
+                    // a mess.
+                    terminal.clear()?;
+                    return Ok(())
+                }
+                // Otherwise, throw them away.
+                _ => (),
+            }
+        }
+    }
 }