Implement app components

src/app.rs

@@ -1,27 +1,77 @@
+use crossterm::event::Event;
 use eyre::Result;
 use ratatui::prelude::*;
-use std::io::Stdout;
 use std::time::Duration;
 
+use crate::app_event::AppEvent;
+use crate::component::Component;
+use crate::components;
 use crate::tui;
 
 pub struct App {
-    pub terminal: Terminal<CrosstermBackend<Stdout>>,
+    pub tui: tui::Tui,
     pub tick_rate: Duration,
+    pub components: Vec<Box<dyn Component>>,
 }
 
 impl App {
-    pub fn start(tick_rate: Duration) -> Result<Self> {
-        let terminal = tui::init()?;
+    pub fn new(tick_rate: Duration) -> Result<Self> {
+        let tui = tui::init()?;
+
+        let hello_world = components::hello_world::HelloWorld::default();
+        let hello_world1 = components::hello_world::HelloWorld::default();
+        let hello_world2 = components::hello_world::HelloWorld::default();
+        let hello_world3 = components::hello_world::HelloWorld::default();
 
         Ok(Self {
-            terminal,
+            tui,
             tick_rate,
+            components: vec![
+                Box::new(hello_world),
+                Box::new(hello_world1),
+                Box::new(hello_world2),
+                Box::new(hello_world3),
+            ],
         })
     }
 
     pub fn run(&mut self) -> Result<()> {
-        Ok(())
+        loop {
+            let event: Option<AppEvent> = match tui::get_event(self.tick_rate)?
+            {
+                Some(event) => match event {
+                    Event::Key(key) => Some(AppEvent::Key(key)),
+                    Event::Mouse(mouse) => Some(AppEvent::Mouse(mouse)),
+                    Event::FocusGained => todo!(),
+                    Event::FocusLost => todo!(),
+                    Event::Paste(_) => todo!(),
+                    Event::Resize(_, _) => todo!(),
+                },
+                None => None,
+            };
+
+            if event.is_some() {
+                for component in self.components.iter_mut() {
+                    let _ = component.handle_event(event.expect(""))?;
+                }
+            }
+
+            self.tui.draw(|frame| {
+                let layout = Layout::default()
+                    .direction(Direction::Vertical)
+                    .constraints([
+                        Constraint::Percentage(25),
+                        Constraint::Percentage(25),
+                        Constraint::Percentage(25),
+                        Constraint::Percentage(25),
+                    ])
+                    .split(frame.size());
+
+                for (i, component) in self.components.iter_mut().enumerate() {
+                    let _ = component.render(frame, layout[i]);
+                }
+            })?;
+        }
     }
 
     pub fn quit(&mut self) -> Result<()> {

src/app_event.rs

@@ -1,5 +1,6 @@
 use crossterm::event::{KeyEvent, MouseEvent};
 
+#[derive(Clone, Copy)]
 pub enum AppEvent {
     Key(KeyEvent),
     Mouse(MouseEvent),

src/component.rs

@@ -39,5 +39,5 @@ pub trait Component {
         Ok(None)
     }
 
-    fn render(&mut self, frame: &mut Frame, rect: Rect);
+    fn render(&mut self, frame: &mut Frame, rect: Rect) -> Result<()>;
 }

src/components/hello_world.rs

@@ -0,0 +1,17 @@
+use ratatui::prelude::*;
+use ratatui::widgets::Paragraph;
+
+use crate::component::Component;
+
+#[derive(Default, Clone)]
+pub struct HelloWorld {
+    pub text: String,
+}
+
+impl Component for HelloWorld {
+    fn render(&mut self, frame: &mut Frame, rect: Rect) -> eyre::Result<()> {
+        frame.render_widget(Paragraph::new(self.text.clone()), rect);
+
+        Ok(())
+    }
+}

src/components/mod.rs

@@ -0,0 +1 @@
+pub mod hello_world;

src/main.rs

@@ -2,12 +2,14 @@ mod action;
 mod app;
 mod app_event;
 mod component;
+mod components;
 mod tui;
 
 use eyre::Result;
 
 fn main() -> Result<()> {
-    let mut app = app::App::start(std::time::Duration::from_millis(10))?;
+    let mut app = app::App::new(std::time::Duration::from_millis(10))?;
+    app.run()?;
 
     app.quit()
 }

src/tui.rs

@@ -1,7 +1,7 @@
-use std::io::{self, stdout, Stdout};
-
-use crossterm::{execute, terminal::*};
+use crossterm::{event, event::Event, execute, terminal::*};
 use ratatui::prelude::*;
+use std::io;
+use std::io::{stdout, Stdout};
 
 pub type Tui = Terminal<CrosstermBackend<Stdout>>;
 
@@ -18,3 +18,11 @@ pub fn restore() -> io::Result<()> {
 
     Ok(())
 }
+
+pub fn get_event(tick: std::time::Duration) -> io::Result<Option<Event>> {
+    if event::poll(tick)? {
+        return Ok(Some(event::read()?));
+    }
+
+    Ok(None)
+}