Merge pull request #16 from pm100/ghost

placeholder feature

examples/placepop.rs

@@ -0,0 +1,64 @@
+use crossterm::event::{DisableMouseCapture, EnableMouseCapture};
+use crossterm::terminal::{
+    disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen,
+};
+use std::io;
+use tui::backend::CrosstermBackend;
+use tui::layout::Rect;
+use tui::style::{Color, Style};
+use tui::widgets::{Block, Borders};
+use tui::Terminal;
+use tui_textarea::{Input, Key, TextArea};
+
+fn main() -> io::Result<()> {
+    let stdout = io::stdout();
+    let mut stdout = stdout.lock();
+
+    enable_raw_mode()?;
+    crossterm::execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
+    let backend = CrosstermBackend::new(stdout);
+    let mut term = Terminal::new(backend)?;
+
+    let mut textarea = TextArea::default();
+    textarea.set_block(
+        Block::default()
+            .borders(Borders::ALL)
+            .border_style(Style::default().fg(Color::LightBlue))
+            .title("Crossterm Popup Example"),
+    );
+
+    let area = Rect {
+        width: 40,
+        height: 5,
+        x: 5,
+        y: 5,
+    };
+    textarea.set_style(Style::default().fg(Color::Yellow));
+
+    // set placeholder
+
+    textarea.set_placeholder_style(Style::default());
+    textarea.set_placeholder("prompt message".to_string());
+    loop {
+        term.draw(|f| {
+            f.render_widget(textarea.widget(), area);
+        })?;
+        match crossterm::event::read()?.into() {
+            Input { key: Key::Esc, .. } => break,
+            input => {
+                textarea.input(input);
+            }
+        }
+    }
+
+    disable_raw_mode()?;
+    crossterm::execute!(
+        term.backend_mut(),
+        LeaveAlternateScreen,
+        DisableMouseCapture
+    )?;
+    term.show_cursor()?;
+
+    println!("Lines: {:?}", textarea.lines());
+    Ok(())
+}

examples/ratatui_placepop.rs

@@ -0,0 +1,62 @@
+use crossterm::event::{DisableMouseCapture, EnableMouseCapture};
+use crossterm::terminal::{
+    disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen,
+};
+use crossterm_026 as crossterm;
+use ratatui::backend::CrosstermBackend;
+use ratatui::layout::Rect;
+use ratatui::style::{Color, Style};
+use ratatui::widgets::{Block, Borders};
+use ratatui::Terminal;
+use std::io;
+use tui_textarea::{Input, Key, TextArea};
+
+fn main() -> io::Result<()> {
+    let stdout = io::stdout();
+    let mut stdout = stdout.lock();
+
+    enable_raw_mode()?;
+    crossterm::execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
+    let backend = CrosstermBackend::new(stdout);
+    let mut term = Terminal::new(backend)?;
+
+    let mut textarea = TextArea::default();
+    textarea.set_block(
+        Block::default()
+            .borders(Borders::ALL)
+            .border_style(Style::default().fg(Color::LightBlue))
+            .title("Crossterm Popup Example"),
+    );
+
+    let area = Rect {
+        width: 40,
+        height: 5,
+        x: 5,
+        y: 5,
+    };
+    textarea.set_style(Style::default().fg(Color::Yellow));
+    textarea.set_placeholder_style(Style::default());
+    textarea.set_placeholder("prompt message".to_string());
+    loop {
+        term.draw(|f| {
+            f.render_widget(textarea.widget(), area);
+        })?;
+        match crossterm::event::read()?.into() {
+            Input { key: Key::Esc, .. } => break,
+            input => {
+                textarea.input(input);
+            }
+        }
+    }
+
+    disable_raw_mode()?;
+    crossterm::execute!(
+        term.backend_mut(),
+        LeaveAlternateScreen,
+        DisableMouseCapture
+    )?;
+    term.show_cursor()?;
+
+    println!("Lines: {:?}", textarea.lines());
+    Ok(())
+}

examples/single_line.rs

@@ -37,6 +37,7 @@ fn main() -> io::Result<()> {
 
     let mut textarea = TextArea::default();
     textarea.set_cursor_line_style(Style::default());
+    textarea.set_placeholder("enter a valid float, eg 1.56".to_string());
     let layout =
         Layout::default().constraints([Constraint::Length(3), Constraint::Min(1)].as_slice());
     let mut is_valid = validate(&mut textarea);