106 lines
3.2 KiB
Rust
106 lines
3.2 KiB
Rust
use cstr_core::CString;
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use embedded_graphics::pixelcolor::Rgb565;
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use embedded_graphics::prelude::*;
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use embedded_graphics_simulator::{
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OutputSettingsBuilder, SimulatorDisplay, SimulatorEvent, Window,
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};
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use lvgl::style::Style;
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use lvgl::widgets::{Arc, Label, LabelAlign};
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use lvgl::{self, Align, Color, Part, State, UI};
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use lvgl::{LvError, Widget};
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use lvgl_sys;
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use std::sync::{mpsc, Arc as StdArc, Mutex};
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use std::thread::sleep;
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use std::time::{Duration, Instant};
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fn main() -> Result<(), LvError> {
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let display: SimulatorDisplay<Rgb565> = SimulatorDisplay::new(Size::new(
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lvgl_sys::LV_HOR_RES_MAX,
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lvgl_sys::LV_VER_RES_MAX,
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));
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let output_settings = OutputSettingsBuilder::new().scale(2).build();
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let mut window = Window::new("Arc Example", &output_settings);
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let mut ui = UI::init()?;
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// Implement and register your display:
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ui.disp_drv_register(display)?;
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// Create screen and widgets
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let mut screen = ui.scr_act()?;
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let mut screen_style = Style::default();
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screen_style.set_bg_color(State::DEFAULT, Color::from_rgb((255, 255, 255)));
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screen_style.set_radius(State::DEFAULT, 0);
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screen.add_style(Part::Main, screen_style)?;
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// Create the arc object
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let mut arc = Arc::new(&mut screen)?;
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arc.set_size(150, 150)?;
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arc.set_align(&mut screen, Align::Center, 0, 10)?;
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arc.set_start_angle(135)?;
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arc.set_end_angle(135)?;
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let mut loading_lbl = Label::new(&mut screen)?;
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loading_lbl.set_text(CString::new("Loading...").unwrap().as_c_str())?;
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loading_lbl.set_align(&mut arc, Align::OutTopMid, 0, -10)?;
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loading_lbl.set_label_align(LabelAlign::Center)?;
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let mut loading_style = Style::default();
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loading_style.set_text_color(State::DEFAULT, Color::from_rgb((0, 0, 0)));
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loading_lbl.add_style(Part::Main, loading_style)?;
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let threaded_ui = StdArc::new(Mutex::new(ui));
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let (stop_ch, read_ch) = mpsc::channel();
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let closure_ui = threaded_ui.clone();
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let mut loop_started = Instant::now();
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let tick_thr = std::thread::spawn(move || loop {
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// Needs to be called periodically for LittlevGL internal timing calculations.
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{
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let mut ui = closure_ui.lock().unwrap();
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ui.tick_inc(loop_started.elapsed());
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}
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sleep(Duration::from_millis(5));
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if read_ch.try_recv().is_ok() {
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break;
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}
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loop_started = Instant::now();
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});
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let mut angle = 0;
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let mut forward = true;
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let mut i = 0;
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'running: loop {
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if i > 270 {
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forward = if forward { false } else { true };
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i = 1;
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}
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angle = if forward { angle + 1 } else { angle - 1 };
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arc.set_end_angle(angle + 135)?;
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i += 1;
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sleep(Duration::from_millis(50));
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threaded_ui.lock().unwrap().task_handler();
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if let Some(disp) = threaded_ui.lock().unwrap().get_display_ref() {
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window.update(disp);
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}
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for event in window.events() {
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match event {
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SimulatorEvent::Quit => break 'running,
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_ => {}
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}
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}
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}
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stop_ch.send(true).unwrap();
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tick_thr.join().unwrap();
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Ok(())
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}
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