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//! Interactive Demo - Full working demo with keyboard input
//!
//! This demonstrates the complete tink feature set with real interactivity.
//! Uses rnk's built-in render API for simplicity.
//!
//! Run with: cargo run --example interactive_demo
use std::io::{Write, stdout};
use std::time::Duration;
use crossterm::{
cursor,
event::{self, Event, KeyCode, KeyEvent},
execute,
terminal::{self, ClearType},
};
use rnk::core::Dimension;
use rnk::prelude::*;
/// Demo state
struct DemoState {
counter: i32,
selected_item: usize,
items: Vec<String>,
show_popup: bool,
messages: Vec<String>,
}
impl Default for DemoState {
fn default() -> Self {
Self {
counter: 0,
selected_item: 0,
items: vec![
"First item".into(),
"Second item".into(),
"Third item".into(),
"Fourth item".into(),
],
show_popup: false,
messages: vec!["Welcome! Press 'h' for help.".into()],
}
}
}
fn render_ui(state: &DemoState) -> Element {
Box::new()
.width(Dimension::Percent(100.0))
.flex_direction(FlexDirection::Column)
.padding(1)
// Title
.child(
Box::new()
.border_style(BorderStyle::Double)
.border_color(Color::Cyan)
.padding_x(2.0)
.padding_y(1.0)
.child(
Text::new("Tink Interactive Demo")
.color(Color::Cyan)
.bold()
.into_element(),
)
.into_element(),
)
.child(Newline::new().into_element())
// Main content - two columns
.child(
Box::new()
.flex_direction(FlexDirection::Row)
// Left column - counter
.child(
Box::new()
.width(30)
.border_style(BorderStyle::Round)
.border_color(Color::Yellow)
.padding(1)
.flex_direction(FlexDirection::Column)
.child(
Text::new("Counter Demo")
.color(Color::Yellow)
.bold()
.underline()
.into_element(),
)
.child(Newline::new().into_element())
.child(
Box::new()
.flex_direction(FlexDirection::Row)
.child(Text::new("Value: ").color(Color::White).into_element())
.child(
Text::new(format!("{}", state.counter))
.color(if state.counter >= 0 {
Color::Green
} else {
Color::Red
})
.bold()
.into_element(),
)
.into_element(),
)
.child(Newline::new().into_element())
.child(
Text::new("[+] Increment")
.color(Color::Ansi256(240))
.into_element(),
)
.child(
Text::new("[-] Decrement")
.color(Color::Ansi256(240))
.into_element(),
)
.child(
Text::new("[0] Reset")
.color(Color::Ansi256(240))
.into_element(),
)
.into_element(),
)
.child(Box::new().width(2).into_element())
// Right column - list
.child(
Box::new()
.flex_grow(1.0)
.border_style(BorderStyle::Round)
.border_color(Color::Blue)
.padding(1)
.flex_direction(FlexDirection::Column)
.child(
Text::new("List Navigation")
.color(Color::Blue)
.bold()
.underline()
.into_element(),
)
.child(Newline::new().into_element())
.children(state.items.iter().enumerate().map(|(i, item)| {
let is_selected = i == state.selected_item;
let mut row =
Box::new().flex_direction(FlexDirection::Row).padding_x(1.0);
if is_selected {
row = row.background(Color::Ansi256(236));
}
row.child(
Text::new(if is_selected { "> " } else { " " })
.color(Color::Cyan)
.bold()
.into_element(),
)
.child(
Text::new(item)
.color(if is_selected {
Color::White
} else {
Color::Ansi256(250)
})
.into_element(),
)
.into_element()
}))
.child(Newline::new().into_element())
.child(
Text::new("[j/k] Navigate")
.color(Color::Ansi256(240))
.into_element(),
)
.into_element(),
)
.into_element(),
)
.child(Newline::new().into_element())
// Status messages
.child(
Box::new()
.border_style(BorderStyle::Single)
.border_color(Color::Magenta)
.padding(1)
.child(
Text::new(state.messages.last().unwrap_or(&"".to_string()))
.color(Color::Magenta)
.italic()
.into_element(),
)
.into_element(),
)
// Help popup (absolute positioned, conditionally shown)
.child(render_help_popup(state.show_popup))
.into_element()
}
fn render_help_popup(show: bool) -> Element {
if !show {
return Box::new().hidden().into_element();
}
Box::new()
.position_absolute()
.top(3.0)
.left(15.0)
.width(40)
.border_style(BorderStyle::Double)
.border_color(Color::Green)
.background(Color::Ansi256(234))
.padding(2)
.flex_direction(FlexDirection::Column)
.child(
Text::new(" HELP ")
.color(Color::Green)
.bold()
.into_element(),
)
.child(Newline::new().into_element())
.child(
Text::new(" +/-/0 Counter controls")
.color(Color::White)
.into_element(),
)
.child(
Text::new(" j/k Navigate list")
.color(Color::White)
.into_element(),
)
.child(
Text::new(" h Toggle this help")
.color(Color::White)
.into_element(),
)
.child(
Text::new(" q/Esc Quit")
.color(Color::White)
.into_element(),
)
.child(Newline::new().into_element())
.child(
Text::new("Press 'h' to close")
.color(Color::Ansi256(240))
.italic()
.into_element(),
)
.into_element()
}
fn main() -> std::io::Result<()> {
// Setup terminal
terminal::enable_raw_mode()?;
let mut stdout = stdout();
execute!(stdout, terminal::EnterAlternateScreen, cursor::Hide)?;
let mut state = DemoState::default();
// Main loop
loop {
// Get current terminal size (in case it changed)
let (width, _) = terminal::size()?;
// Render using rnk's built-in API
let element = render_ui(&state);
let output = rnk::render_to_string_raw(&element, width);
execute!(
stdout,
cursor::MoveTo(0, 0),
terminal::Clear(ClearType::All)
)?;
write!(stdout, "{}", output)?;
stdout.flush()?;
// Handle input
if event::poll(Duration::from_millis(100))? {
if let Event::Key(KeyEvent { code, .. }) = event::read()? {
match code {
KeyCode::Char('q') | KeyCode::Esc => break,
KeyCode::Char('h') => {
state.show_popup = !state.show_popup;
state.messages.push(if state.show_popup {
"Help opened".into()
} else {
"Help closed".into()
});
}
KeyCode::Char('+') | KeyCode::Char('=') => {
state.counter += 1;
state.messages.push(format!("Counter: {}", state.counter));
}
KeyCode::Char('-') => {
state.counter -= 1;
state.messages.push(format!("Counter: {}", state.counter));
}
KeyCode::Char('0') => {
state.counter = 0;
state.messages.push("Counter reset".into());
}
KeyCode::Char('j') | KeyCode::Down
if state.selected_item < state.items.len().saturating_sub(1) =>
{
state.selected_item += 1;
state
.messages
.push(format!("Selected: {}", state.items[state.selected_item]));
}
KeyCode::Char('k') | KeyCode::Up if state.selected_item > 0 => {
state.selected_item -= 1;
state
.messages
.push(format!("Selected: {}", state.items[state.selected_item]));
}
_ => {}
}
}
}
}
// Cleanup
execute!(stdout, terminal::LeaveAlternateScreen, cursor::Show)?;
terminal::disable_raw_mode()?;
println!("Thanks for trying Tink!");
Ok(())
}