lvgl-rs/examples/bar.rs

98 lines
2.8 KiB
Rust

use embedded_graphics::pixelcolor::Rgb565;
use embedded_graphics::prelude::*;
use embedded_graphics_simulator::{
OutputSettingsBuilder, SimulatorDisplay, SimulatorEvent, Window,
};
use lvgl::widgets::{Bar, Label};
use lvgl::{self, Align, Animation, Color, DisplayDriver, Object, Style, UI};
use lvgl_sys;
use std::sync::{mpsc, Arc, Mutex};
use std::thread::sleep;
use std::time::Duration;
fn main() -> Result<(), String> {
let mut display: SimulatorDisplay<Rgb565> = SimulatorDisplay::new(Size::new(
lvgl_sys::LV_HOR_RES_MAX,
lvgl_sys::LV_VER_RES_MAX,
));
let output_settings = OutputSettingsBuilder::new().scale(2).build();
let mut window = Window::new("Bar Example", &output_settings);
let mut ui = UI::init().unwrap();
// Implement and register your display:
let display_driver = DisplayDriver::new(&mut display);
ui.disp_drv_register(display_driver);
// Create screen and widgets
let mut screen = ui.scr_act();
let mut screen_style = Style::new();
screen_style.set_body_main_color(Color::from_rgb((0, 0, 0)));
screen_style.set_body_grad_color(Color::from_rgb((0, 0, 0)));
screen_style.set_body_radius(0);
screen.set_style(screen_style);
// Create the bar object
let mut bar = Bar::new(&mut screen);
bar.set_size(175, 50);
bar.set_align(&mut screen, Align::Center, 0, 0);
bar.set_range(0, 100);
bar.set_value(0, Animation::OFF);
let mut loading_lbl = Label::new(&mut screen);
loading_lbl.set_text("Loading...");
loading_lbl.set_align(&mut bar, Align::OutTopMid, 0, -10);
loading_lbl.on_event(|mut this, event| {
if let lvgl::Event::Clicked = event {
this.set_text("Clicked!");
}
});
let mut loading_style = Style::new();
loading_style.set_text_color(Color::from_rgb((255, 255, 255)));
loading_lbl.set_style(loading_style);
let threaded_ui = Arc::new(Mutex::new(ui));
let (stop_ch, read_ch) = mpsc::channel();
let closure_ui = threaded_ui.clone();
let tick_thr = std::thread::spawn(move || loop {
let period = Duration::from_millis(5);
closure_ui.lock().unwrap().tick_inc(period);
sleep(period);
if read_ch.try_recv().is_ok() {
break;
}
});
let mut i = 0;
'running: loop {
if i > 100 {
i = 0;
}
bar.set_value(i, Animation::OFF);
i += 1;
sleep(Duration::from_millis(25));
threaded_ui.lock().unwrap().task_handler();
window.update(&display);
for event in window.events() {
match event {
SimulatorEvent::Quit => break 'running,
_ => {}
}
}
}
stop_ch.send(true).unwrap();
tick_thr.join().unwrap();
Ok(())
}