restructure example

src/controller.rs

@@ -0,0 +1,72 @@
+use crate::model::{AppState, AppStateTable};
+use crate::{view, App};
+use crossterm::event;
+use crossterm::event::{Event, KeyCode};
+use std::io;
+use tui::backend::Backend;
+use tui::widgets::TableState;
+use tui::Terminal;
+
+pub fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
+    loop {
+        terminal.draw(|f| view::ui(f, &mut app))?;
+
+        if let Event::Key(key) = event::read()? {
+            match key.code {
+                KeyCode::Char('q') => return Ok(()),
+                KeyCode::Down => app.next(),
+                KeyCode::Up => app.previous(),
+                KeyCode::Enter => app.select(),
+                _ => {}
+            }
+        }
+    }
+}
+
+impl App {
+    pub fn new() -> App {
+        App {
+            state: AppState::Table(AppStateTable {
+                table_state: TableState::default(),
+                items: vec![
+                    vec!["backend".to_string(), "running".to_string()],
+                    vec!["frontend".to_string(), "exited (0)".to_string()],
+                    vec!["frontend".to_string(), "failed (1)".to_string()],
+                ],
+            }),
+        }
+    }
+    pub fn next(&mut self) {
+        if let AppState::Table(AppStateTable { table_state, items }) = &mut self.state {
+            let i = match table_state.selected() {
+                Some(i) => {
+                    if i >= items.len() - 1 {
+                        0
+                    } else {
+                        i + 1
+                    }
+                }
+                None => 0,
+            };
+            table_state.select(Some(i));
+        }
+    }
+
+    pub fn previous(&mut self) {
+        if let AppState::Table(AppStateTable { table_state, items }) = &mut self.state {
+            let i = match table_state.selected() {
+                Some(i) => {
+                    if i == 0 {
+                        items.len() - 1
+                    } else {
+                        i - 1
+                    }
+                }
+                None => 0,
+            };
+            table_state.select(Some(i));
+        }
+    }
+
+    pub fn select(&mut self) {}
+}