tuirealm 4.1.0

A tui-rs framework to build tui interfaces, inspired by React and Elm.
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//! ## Model
//!
//! app model

use tuirealm::application::Application;
use tuirealm::ratatui::layout::{Constraint, Direction, Layout};
use tuirealm::terminal::{CrosstermTerminalAdapter, TerminalAdapter, TerminalResult};

use super::{Id, Msg, UserEvent};

pub struct Model {
    /// Application
    pub app: Application<Id, Msg, UserEvent>,
    /// Indicates that the application must quit
    pub quit: bool,
    /// Tells whether to redraw interface
    pub redraw: bool,
    /// Used to draw to terminal
    pub terminal: CrosstermTerminalAdapter,
}

impl Model {
    fn init_adapter() -> TerminalResult<CrosstermTerminalAdapter> {
        let mut adapter = CrosstermTerminalAdapter::new()?;
        adapter.enable_raw_mode()?;
        adapter.enter_alternate_screen()?;

        Ok(adapter)
    }

    pub fn new(app: Application<Id, Msg, UserEvent>) -> TerminalResult<Self> {
        Ok(Self {
            app,
            quit: false,
            redraw: true,
            terminal: Self::init_adapter()?,
        })
    }

    pub fn view(&mut self) {
        assert!(
            self.terminal
                .draw(|f| {
                    let chunks = Layout::default()
                        .direction(Direction::Vertical)
                        .margin(1)
                        .constraints(
                            [
                                Constraint::Length(3), // Label
                                Constraint::Length(3), // Other
                            ]
                            .as_ref(),
                        )
                        .split(f.area());
                    self.app.view(&Id::Label, f, chunks[0]);
                    self.app.view(&Id::Other, f, chunks[1]);
                })
                .is_ok()
        );
    }
}

// Let's implement Update for model

impl Model {
    pub fn update(&mut self, msg: Msg) {
        // Set redraw
        self.redraw = true;
        // Match message
        match msg {
            Msg::AppClose => {
                self.quit = true; // Terminate
            }
            Msg::Redraw => (),
        }
    }
}