use tao::{
event::{DeviceEvent, Event, WindowEvent},
event_loop::{ControlFlow, EventLoop},
window::WindowBuilder,
};
#[allow(clippy::collapsible_match)]
#[allow(clippy::single_match)]
fn main() {
env_logger::init();
let event_loop = EventLoop::new();
let window = WindowBuilder::new()
.with_title("Mouse Wheel events")
.build(&event_loop)
.unwrap();
event_loop.run(move |event, _, control_flow| {
*control_flow = ControlFlow::Wait;
match event {
Event::WindowEvent { event, .. } => match event {
WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
_ => (),
},
Event::DeviceEvent { event, .. } => match event {
DeviceEvent::MouseWheel { delta, .. } => match delta {
tao::event::MouseScrollDelta::LineDelta(x, y) => {
println!("mouse wheel Line Delta: ({},{})", x, y);
let pixels_per_line = 120.0;
let mut pos = window.outer_position().unwrap();
pos.x -= (x * pixels_per_line) as i32;
pos.y -= (y * pixels_per_line) as i32;
window.set_outer_position(pos)
}
tao::event::MouseScrollDelta::PixelDelta(p) => {
println!("mouse wheel Pixel Delta: ({},{})", p.x, p.y);
let mut pos = window.outer_position().unwrap();
pos.x -= p.x as i32;
pos.y -= p.y as i32;
window.set_outer_position(pos)
}
_ => (),
},
_ => (),
},
_ => (),
}
});
}