use cstr_core::CString; use embedded_graphics::pixelcolor::Rgb565; use embedded_graphics::prelude::*; use embedded_graphics_simulator::{ OutputSettingsBuilder, SimulatorDisplay, SimulatorEvent, Window, }; use lvgl::style::Style; use lvgl::widgets::{Arc, Label, LabelAlign}; use lvgl::{self, Align, Color, Part, State, UI}; use lvgl::{LvError, Widget}; use lvgl_sys; use std::time::Instant; fn main() -> Result<(), LvError> { let display: SimulatorDisplay = 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("Arc Example", &output_settings); let mut ui = UI::init()?; // Implement and register your display: ui.disp_drv_register(display)?; // Create screen and widgets let mut screen = ui.scr_act()?; let mut screen_style = Style::default(); screen_style.set_bg_color(State::DEFAULT, Color::from_rgb((255, 255, 255))); screen_style.set_radius(State::DEFAULT, 0); screen.add_style(Part::Main, screen_style)?; // Create the arc object let mut arc = Arc::new(&mut screen)?; arc.set_size(150, 150)?; arc.set_align(&mut screen, Align::Center, 0, 10)?; arc.set_start_angle(135)?; arc.set_end_angle(135)?; let mut loading_lbl = Label::new(&mut screen)?; loading_lbl.set_text(CString::new("Loading...").unwrap().as_c_str())?; loading_lbl.set_align(&mut arc, Align::OutTopMid, 0, -10)?; loading_lbl.set_label_align(LabelAlign::Center)?; let mut loading_style = Style::default(); loading_style.set_text_color(State::DEFAULT, Color::from_rgb((0, 0, 0))); loading_lbl.add_style(Part::Main, loading_style)?; let mut angle = 0; let mut forward = true; let mut i = 0; let mut loop_started = Instant::now(); 'running: loop { if i > 270 { forward = if forward { false } else { true }; i = 1; } angle = if forward { angle + 1 } else { angle - 1 }; arc.set_end_angle(angle + 135)?; i += 1; ui.task_handler(); window.update(ui.get_display_ref().unwrap()); for event in window.events() { match event { SimulatorEvent::Quit => break 'running, _ => {} } } ui.tick_inc(loop_started.elapsed()); loop_started = Instant::now(); } Ok(()) }