fltk-rs捕获(监听)特定按键

利用元素自带的handl加事件匹配与判断

//这里演示了“e”键和“esc”键的监听
use fltk::{app::{self, event_key_down}, enums::{Event, Key}, prelude::{GroupExt, WidgetBase, WidgetExt}, window::Window};

fn main() {
    let app = app::App::default();
    let mut wind = Window::default().with_size(200, 200);
    //to do some thing
    wind.end();
    wind.show();
    wind.handle(move |_,event|match event{
        Event::KeyDown =>{
            if event_key_down(Key::from_char('e')){
                println!("e down");
            }
            if event_key_down(Key::Escape){
                println!("escape down");
            }
            true
        }
        _ => false,
    });
    
    app.run().unwrap();
}