Add bar example

examples/Cargo.toml

@@ -14,3 +14,7 @@ embedded-graphics-simulator = "0.2.0"
 [[example]]
 name = "demo"
 path = "demo.rs"
+
+[[example]]
+name = "bar"
+path = "bar.rs"

examples/bar.rs

@@ -0,0 +1,82 @@
+use embedded_graphics::pixelcolor::Rgb565;
+use embedded_graphics::prelude::*;
+use embedded_graphics_simulator::{
+    OutputSettingsBuilder, SimulatorDisplay, SimulatorEvent, Window,
+};
+use lvgl::{self, widgets::Bar, Align, 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.set_style(screen_style);
+
+    // Create the bar object
+    let mut bar = Bar::new(&mut screen);
+    bar.set_size(50, 175);
+    bar.set_align(&mut screen, Align::Center, 0, 0);
+    bar.set_range(0, 100);
+    bar.set_value(0);
+
+    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);
+        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(())
+}