rust_minifb/examples/mouse.rs

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extern crate minifb;
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use minifb::{Key, MouseButton, MouseMode, Scale, Window, WindowOptions};
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const WIDTH: usize = 640;
const HEIGHT: usize = 360;
fn main() {
let mut buffer: Vec<u32> = vec![0; WIDTH * HEIGHT];
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let mut window = match Window::new(
"Mouse Draw - Press ESC to exit",
WIDTH,
HEIGHT,
WindowOptions {
resize: true,
scale: Scale::X2,
..WindowOptions::default()
},
) {
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Ok(win) => win,
Err(err) => {
println!("Unable to create window {}", err);
return;
}
};
let (mut width, mut height) = (WIDTH, HEIGHT);
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while window.is_open() && !window.is_key_down(Key::Escape) {
{
let (new_width, new_height) = window.get_size();
if new_width != width || new_height != height {
// copy valid bits of old buffer to new buffer
let mut new_buffer = vec![0; new_width * new_height / 2 / 2];
for y in 0..(height / 2).min(new_height / 2) {
for x in 0..(width / 2).min(new_width / 2) {
new_buffer[y * (new_width / 2) + x] = buffer[y * (width / 2) + x];
}
}
buffer = new_buffer;
width = new_width;
height = new_height;
}
}
window.get_mouse_pos(MouseMode::Discard).map(|(x, y)| {
let screen_pos = ((y as usize) * width / 2) + x as usize;
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println!(
"{:?}",
window.get_unscaled_mouse_pos(MouseMode::Discard).unwrap()
);
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if window.get_mouse_down(MouseButton::Left) {
buffer[screen_pos] = 0x00ffffff;
}
if window.get_mouse_down(MouseButton::Right) {
buffer[screen_pos] = 0;
}
});
window.get_scroll_wheel().map(|scroll| {
println!("Scrolling {} - {}", scroll.0, scroll.1);
});
// We unwrap here as we want this code to exit if it fails
window.update_with_buffer(&buffer).unwrap();
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}
}