add example for usage with termwiz crate

examples/termwiz.rs

@@ -0,0 +1,67 @@
+use ratatui::backend::TermwizBackend;
+use ratatui::widgets::{Block, Borders};
+use ratatui::Terminal;
+use std::error::Error;
+use std::time::{Duration, Instant};
+use termwiz::input::InputEvent;
+use termwiz::terminal::Terminal as TermwizTerminal;
+use tui_textarea::{Input, Key, TextArea};
+
+const TICK_RATE: Duration = Duration::from_millis(100);
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let backend = TermwizBackend::new()?;
+    let mut term = Terminal::new(backend)?;
+    term.hide_cursor()?;
+
+    let mut textarea = TextArea::default();
+    textarea.set_block(
+        Block::default()
+            .borders(Borders::ALL)
+            .title("Termwiz Minimal Example"),
+    );
+    let mut last_tick = Instant::now();
+
+    // The event loop
+    loop {
+        term.draw(|f| {
+            let widget = textarea.widget();
+            f.render_widget(widget, f.size());
+        })?;
+
+        let timeout = TICK_RATE
+            .checked_sub(last_tick.elapsed())
+            .unwrap_or_else(|| Duration::from_secs(0));
+
+        if let Some(input) = term
+            .backend_mut()
+            .buffered_terminal_mut()
+            .terminal()
+            .poll_input(Some(timeout))?
+        {
+            if let InputEvent::Resized { cols, rows } = input {
+                term.backend_mut()
+                    .buffered_terminal_mut()
+                    .resize(cols, rows);
+            } else {
+                match input.into() {
+                    Input { key: Key::Esc, .. } => break,
+                    input => {
+                        textarea.input(input);
+                    }
+                }
+            }
+        }
+
+        if last_tick.elapsed() >= TICK_RATE {
+            last_tick = Instant::now();
+        }
+    }
+
+    term.show_cursor()?;
+    term.flush()?;
+    drop(term); // Leave terminal raw mode to print the following line
+
+    println!("Lines: {:?}", textarea.lines());
+    Ok(())
+}

src/input.rs

@@ -9,8 +9,8 @@ use arbitrary::Arbitrary;
 use termion::event::{Event as TermionEvent, Key as TermionKey, MouseEvent as TermionMouseEvent};
 #[cfg(feature = "ratatui-termwiz")]
 use termwiz::input::{
-    InputEvent as TermwizInputEvent, KeyEvent as TermwizKeyEvent, MouseEvent as TermwizMouseEvent,
-    PixelMouseEvent,
+    InputEvent as TermwizInputEvent, KeyEvent as TermwizKeyEvent,
+    MouseButtons as TermwizMouseButtons, MouseEvent as TermwizMouseEvent, PixelMouseEvent,
 };
 
 /// Backend-agnostic key input kind.
@@ -269,26 +269,34 @@ impl From<TermwizKeyEvent> for Input {
     }
 }
 
+#[cfg(feature = "ratatui-termwiz")]
+impl From<TermwizMouseButtons> for Key {
+    /// Convert [`termwiz::input::MouseButtons`] to [`Key`].
+    fn from(buttons: TermwizMouseButtons) -> Self {
+        if buttons.contains(TermwizMouseButtons::VERT_WHEEL) {
+            if buttons.contains(TermwizMouseButtons::WHEEL_POSITIVE) {
+                Key::MouseScrollUp
+            } else {
+                Key::MouseScrollDown
+            }
+        } else {
+            Key::Null
+        }
+    }
+}
+
 #[cfg(feature = "ratatui-termwiz")]
 impl From<TermwizMouseEvent> for Input {
     /// Convert [`termwiz::input::MouseEvent`] to [`Input`].
     fn from(mouse: TermwizMouseEvent) -> Self {
-        use termwiz::input::{Modifiers, MouseButtons};
+        use termwiz::input::Modifiers;
 
         let TermwizMouseEvent {
             mouse_buttons,
             modifiers,
             ..
         } = mouse;
-        let key = if mouse_buttons.contains(MouseButtons::VERT_WHEEL) {
-            if mouse_buttons.contains(MouseButtons::WHEEL_POSITIVE) {
-                Key::MouseScrollDown
-            } else {
-                Key::MouseScrollUp
-            }
-        } else {
-            Key::Null
-        };
+        let key = Key::from(mouse_buttons);
         let ctrl = modifiers.contains(Modifiers::CTRL);
         let alt = modifiers.contains(Modifiers::ALT);
 
@@ -300,22 +308,14 @@ impl From<TermwizMouseEvent> for Input {
 impl From<PixelMouseEvent> for Input {
     /// Convert [`termwiz::input::PixelMouseEvent`] to [`Input`].
     fn from(mouse: PixelMouseEvent) -> Self {
-        use termwiz::input::{Modifiers, MouseButtons};
+        use termwiz::input::Modifiers;
 
         let PixelMouseEvent {
             mouse_buttons,
             modifiers,
             ..
         } = mouse;
-        let key = if mouse_buttons.contains(MouseButtons::VERT_WHEEL) {
-            if mouse_buttons.contains(MouseButtons::WHEEL_POSITIVE) {
-                Key::MouseScrollDown
-            } else {
-                Key::MouseScrollUp
-            }
-        } else {
-            Key::Null
-        };
+        let key = Key::from(mouse_buttons);
         let ctrl = modifiers.contains(Modifiers::CTRL);
         let alt = modifiers.contains(Modifiers::ALT);