PistonWindow.set_size() does not always apply size #285
Description
Example to reproduce
Compiler
rustc --version
rustc 1.47.0 (18bf6b4f0 2020-10-07)
Cargo.toml
[dependencies]
piston_window = "0.113.0"main.rs
extern crate piston_window;
use piston_window::*;
fn main() {
let mut window: PistonWindow = WindowSettings::new("Test Window", [480.0, 480.0])
.exit_on_esc(true)
.build()
.unwrap();
while let Some(e) = window.next() {
if let Some(_) = e.render_args() {
render(&mut window, &e);
}
if let Some(r) = e.resize_args() {
resize(r, &mut window);
}
}
}
fn render(window: &mut PistonWindow, e: &Event) {
let win_size = window.size();
window.draw_2d(e, |c, g, _device| {
clear([1.0; 4], g);
rectangle(
[1.0, 1.0, 0.0, 1.0],
[
0.0,
0.0,
win_size.width,
win_size.height,
],
c.transform,
g,
);
});
}
fn resize(r: ResizeArgs, window: &mut PistonWindow) {
println!("window resized to {} {}", r.window_size[0], r.window_size[1]);
if r.window_size[0] != r.window_size[1] {
// try to maintain aspect ratio 1:1
let xy = (r.window_size[0] + r.window_size[1]) / 2.0;
let size = Size { width: xy, height: xy };
window.set_size(size);
println!("square set to {:?}", size);
println!("actual window size = {:?}", window.size());
}
}Example of output when it does not apply:
window resized to 480 480
window resized to 480 478.7692307692308
square set to Size { width: 479.38461538461536, height: 479.38461538461536 }
actual window size = Size { width: 480.0, height: 478.7692307692308 }
window resized to 490.46153846153845 470.7692307692308
square set to Size { width: 480.61538461538464, height: 480.61538461538464 }
actual window size = Size { width: 490.46153846153845, height: 470.7692307692308 }
window resized to 518.7692307692307 446.7692307692308
square set to Size { width: 482.7692307692307, height: 482.7692307692307 }
actual window size = Size { width: 518.7692307692307, height: 446.7692307692308 }
Example of output when it does apply:
window resized to 617.2307692307693 361.84615384615387
square set to Size { width: 489.53846153846155, height: 489.53846153846155 }
actual window size = Size { width: 617.2307692307693, height: 361.84615384615387 }
window resized to 489.84615384615387 489.84615384615387