,可以通过使用Rust的标准库中的键码映射表来实现。键码映射表提供了一个将扫描码映射到字符的机制,可以忽略键盘布局的差异。
在Rust中,可以使用event::VirtualKeyCode
枚举类型来表示键码。要检索与键盘布局无关的键入字符,可以使用event::from_scancode
函数将扫描码转换为键码。然后,可以使用event::VirtualKeyCode
的to_string
方法将键码转换为字符串表示。
以下是一个示例代码,演示如何从Rust中的扫描码中检索与键盘布局无关的键入字符:
use std::io::{self, Read};
use glium::glutin::{event, event_loop::ControlFlow, event::VirtualKeyCode};
fn main() {
let mut events_loop = glium::glutin::event_loop::EventLoop::new();
let _window = glium::glutin::window::WindowBuilder::new()
.with_title("Rust Keyboard Input")
.build(&events_loop)
.unwrap();
events_loop.run(move |event, _, control_flow| {
*control_flow = ControlFlow::Wait;
match event {
event::Event::WindowEvent { event, .. } => match event {
event::WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
event::WindowEvent::KeyboardInput { input, .. } => {
if let Some(keycode) = input.virtual_keycode {
if let Some(character) = event::from_scancode(input.scancode) {
if let Some(c) = keycode_to_char(character) {
println!("Typed character: {}", c);
}
}
}
}
_ => (),
},
_ => (),
}
});
}
fn keycode_to_char(keycode: VirtualKeyCode) -> Option<char> {
match keycode {
VirtualKeyCode::Key1 => Some('1'),
VirtualKeyCode::Key2 => Some('2'),
VirtualKeyCode::Key3 => Some('3'),
VirtualKeyCode::Key4 => Some('4'),
VirtualKeyCode::Key5 => Some('5'),
VirtualKeyCode::Key6 => Some('6'),
VirtualKeyCode::Key7 => Some('7'),
VirtualKeyCode::Key8 => Some('8'),
VirtualKeyCode::Key9 => Some('9'),
VirtualKeyCode::Key0 => Some('0'),
VirtualKeyCode::A => Some('a'),
VirtualKeyCode::B => Some('b'),
VirtualKeyCode::C => Some('c'),
VirtualKeyCode::D => Some('d'),
VirtualKeyCode::E => Some('e'),
VirtualKeyCode::F => Some('f'),
VirtualKeyCode::G => Some('g'),
VirtualKeyCode::H => Some('h'),
VirtualKeyCode::I => Some('i'),
VirtualKeyCode::J => Some('j'),
VirtualKeyCode::K => Some('k'),
VirtualKeyCode::L => Some('l'),
VirtualKeyCode::M => Some('m'),
VirtualKeyCode::N => Some('n'),
VirtualKeyCode::O => Some('o'),
VirtualKeyCode::P => Some('p'),
VirtualKeyCode::Q => Some('q'),
VirtualKeyCode::R => Some('r'),
VirtualKeyCode::S => Some('s'),
VirtualKeyCode::T => Some('t'),
VirtualKeyCode::U => Some('u'),
VirtualKeyCode::V => Some('v'),
VirtualKeyCode::W => Some('w'),
VirtualKeyCode::X => Some('x'),
VirtualKeyCode::Y => Some('y'),
VirtualKeyCode::Z => Some('z'),
_ => None,
}
}
这个示例代码使用了Rust的图形库glium
和窗口管理库glutin
来创建一个窗口,并监听键盘输入事件。当用户按下一个键时,会将扫描码转换为键码,并通过keycode_to_char
函数将键码转换为对应的字符。然后,将字符打印到控制台。
请注意,这只是一个简单的示例,仅处理了一些常见的键码。实际上,键码与字符之间的映射可能因操作系统和键盘布局而异。在实际应用中,您可能需要根据特定的操作系统和键盘布局来处理更多的键码和字符映射。
对于更复杂的键盘输入处理需求,您可以使用更高级的库或框架,如crossterm
、termion
等,它们提供了更多的功能和抽象来处理键盘输入。
关于Rust中的键盘输入处理和相关概念的更多信息,您可以参考以下链接:
请注意,以上链接中的文档可能会随着库的版本更新而变化,建议根据实际情况查阅最新的文档。
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