From 58fb346b2584a4cd4d01d80d3403f7629b6c7ede Mon Sep 17 00:00:00 2001
From: numzero <numzer0@yandex.ru>
Date: Sat, 6 Sep 2025 03:36:19 +0300
Subject: [PATCH] now with the main loop

---
 Cargo.lock  |  1 +
 Cargo.toml  |  1 +
 src/main.rs | 74 +++++++++++++++++++++++++++++++----------------------
 3 files changed, 45 insertions(+), 31 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 92492f8..e7dadce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -885,6 +885,7 @@ name = "gears"
 version = "0.1.0"
 dependencies = [
  "flo_draw",
+ "futures",
  "glam",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index d4e3839..a870244 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,4 +5,5 @@ edition = "2024"
 
 [dependencies]
 flo_draw = "0.3.1"
+futures = "0.3.31"
 glam = "0.30.5"
diff --git a/src/main.rs b/src/main.rs
index b50b009..9c2adba 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,9 +1,14 @@
-use std::f32::consts::PI;
+use std::{
+	f32::consts::PI,
+	pin::pin,
+	task::{Context, Poll, Waker},
+};
 
 use flo_draw::{
 	canvas::{Color::Rgba, GraphicsContext, GraphicsPrimitives},
-	create_drawing_window, with_2d_graphics,
+	create_drawing_window, create_drawing_window_with_events, with_2d_graphics,
 };
+use futures::{StreamExt, executor, pin_mut};
 use glam::{FloatExt, Mat2, Vec2, vec2};
 
 const fn rad(deg: f32) -> f32 {
@@ -92,42 +97,49 @@ fn main() {
 		let sat = gear_shape(N_TEETH_SAT);
 		let crown = gear_shape_outer(N_TEETH_SKY);
 
-		let canvas = create_drawing_window("Canvas window");
-		canvas.draw(|gc| {
-			gc.clear_canvas(Rgba(0.1, 0.1, 0.1, 1.0));
-
-			gc.canvas_height(100.0);
-			gc.line_width(0.25);
-
-			gc.new_path();
-			for pt in sun {
-				let pt = R_SUN * pt;
-				gc.line_to(pt.x, pt.y);
+		let (canvas, mut events) = create_drawing_window_with_events("Canvas window");
+		'main: loop {
+			while let Poll::Ready(event) =
+				events.poll_next_unpin(&mut Context::from_waker(Waker::noop()))
+			{
+				let Some(_event) = event else { break 'main };
 			}
-			gc.close_path();
-			gc.stroke_color(Rgba(0.8, 0.7, 0.1, 1.0));
-			gc.stroke();
+			canvas.draw(|gc| {
+				gc.clear_canvas(Rgba(0.1, 0.1, 0.1, 1.0));
+
+				gc.canvas_height(100.0);
+				gc.line_width(0.25);
 
-			for k in 0..N_SAT {
-				let m = Mat2::from_angle(k as f32 / N_SAT as f32 * 2. * PI);
 				gc.new_path();
-				for pt in &sat {
-					let pt = m * vec2(OFF_SAT, 0.) + R_SAT * pt;
+				for pt in &sun {
+					let pt = R_SUN * pt;
 					gc.line_to(pt.x, pt.y);
 				}
 				gc.close_path();
-				gc.stroke_color(Rgba(0.1, 0.8, 0.1, 1.0));
+				gc.stroke_color(Rgba(0.8, 0.7, 0.1, 1.0));
 				gc.stroke();
-			}
 
-			gc.new_path();
-			for pt in crown {
-				let pt = R_SKY * pt;
-				gc.line_to(pt.x, pt.y);
-			}
-			gc.close_path();
-			gc.stroke_color(Rgba(0.1, 0.4, 0.8, 1.0));
-			gc.stroke();
-		});
+				for k in 0..N_SAT {
+					let m = Mat2::from_angle(k as f32 / N_SAT as f32 * 2. * PI);
+					gc.new_path();
+					for pt in &sat {
+						let pt = m * vec2(OFF_SAT, 0.) + R_SAT * pt;
+						gc.line_to(pt.x, pt.y);
+					}
+					gc.close_path();
+					gc.stroke_color(Rgba(0.1, 0.8, 0.1, 1.0));
+					gc.stroke();
+				}
+
+				gc.new_path();
+				for pt in &crown {
+					let pt = R_SKY * pt;
+					gc.line_to(pt.x, pt.y);
+				}
+				gc.close_path();
+				gc.stroke_color(Rgba(0.1, 0.4, 0.8, 1.0));
+				gc.stroke();
+			});
+		}
 	});
 }