pub enum Key<Str = SmolStr> {
Named(NamedKey),
Character(Str),
Unidentified(NativeKey),
Dead(Option<char>),
}
Expand description
Key represents the meaning of a keypress.
This is a superset of the UI Events Specification’s KeyboardEvent.key
with
additions:
- All simple variants are wrapped under the
Named
variant - The
Unidentified
variant here, can still identify a key through it’sNativeKeyCode
. - The
Dead
variant here, can specify the character which is inserted when pressing the dead-key twice.
Variants§
Named(NamedKey)
A simple (unparameterised) action
Character(Str)
A key string that corresponds to the character typed by the user, taking into account the user’s current locale setting, and any system-level keyboard mapping overrides that are in effect.
Unidentified(NativeKey)
This variant is used when the key cannot be translated to any other variant.
The native key is provided (if available) in order to allow the user to specify keybindings for keys which are not defined by this API, mainly through some sort of UI.
Dead(Option<char>)
Contains the text representation of the dead-key when available.
§Platform-specific
- Web: Always contains
None
Implementations§
source§impl Key<SmolStr>
impl Key<SmolStr>
sourcepub fn as_ref(&self) -> Key<&str>
pub fn as_ref(&self) -> Key<&str>
Convert Key::Character(SmolStr)
to Key::Character(&str)
so you can more easily match on
Key
. All other variants remain unchanged.
Examples found in repository?
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123
fn window_event(
&mut self,
_event_loop: &ActiveEventLoop,
_window_id: WindowId,
event: WindowEvent,
) {
info!("{event:?}");
match event {
WindowEvent::CloseRequested => {
self.close_requested = true;
},
WindowEvent::KeyboardInput {
event: KeyEvent { logical_key: key, state: ElementState::Pressed, .. },
..
} => match key.as_ref() {
// WARNING: Consider using `key_without_modifiers()` if available on your platform.
// See the `key_binding` example
Key::Character("1") => {
self.mode = Mode::Wait;
warn!("mode: {:?}", self.mode);
},
Key::Character("2") => {
self.mode = Mode::WaitUntil;
warn!("mode: {:?}", self.mode);
},
Key::Character("3") => {
self.mode = Mode::Poll;
warn!("mode: {:?}", self.mode);
},
Key::Character("r") => {
self.request_redraw = !self.request_redraw;
warn!("request_redraw: {}", self.request_redraw);
},
Key::Named(NamedKey::Escape) => {
self.close_requested = true;
},
_ => (),
},
WindowEvent::RedrawRequested => {
let window = self.window.as_ref().unwrap();
window.pre_present_notify();
fill::fill_window(window);
},
_ => (),
}
}
More examples
310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451
fn window_event(
&mut self,
event_loop: &ActiveEventLoop,
window_id: WindowId,
event: WindowEvent,
) {
let window = match self.windows.get_mut(&window_id) {
Some(window) => window,
None => return,
};
match event {
WindowEvent::Resized(size) => {
window.resize(size);
},
WindowEvent::Focused(focused) => {
if focused {
info!("Window={window_id:?} focused");
} else {
info!("Window={window_id:?} unfocused");
}
},
WindowEvent::ScaleFactorChanged { scale_factor, .. } => {
info!("Window={window_id:?} changed scale to {scale_factor}");
},
WindowEvent::ThemeChanged(theme) => {
info!("Theme changed to {theme:?}");
window.set_theme(theme);
},
WindowEvent::RedrawRequested => {
if let Err(err) = window.draw() {
error!("Error drawing window: {err}");
}
},
WindowEvent::Occluded(occluded) => {
window.set_occluded(occluded);
},
WindowEvent::CloseRequested => {
info!("Closing Window={window_id:?}");
self.windows.remove(&window_id);
},
WindowEvent::ModifiersChanged(modifiers) => {
window.modifiers = modifiers.state();
info!("Modifiers changed to {:?}", window.modifiers);
},
WindowEvent::MouseWheel { delta, .. } => match delta {
MouseScrollDelta::LineDelta(x, y) => {
info!("Mouse wheel Line Delta: ({x},{y})");
},
MouseScrollDelta::PixelDelta(px) => {
info!("Mouse wheel Pixel Delta: ({},{})", px.x, px.y);
},
},
WindowEvent::KeyboardInput { event, is_synthetic: false, .. } => {
let mods = window.modifiers;
// Dispatch actions only on press.
if event.state.is_pressed() {
let action = if let Key::Character(ch) = event.logical_key.as_ref() {
Self::process_key_binding(&ch.to_uppercase(), &mods)
} else {
None
};
if let Some(action) = action {
self.handle_action(event_loop, window_id, action);
}
}
},
WindowEvent::MouseInput { button, state, .. } => {
let mods = window.modifiers;
if let Some(action) =
state.is_pressed().then(|| Self::process_mouse_binding(button, &mods)).flatten()
{
self.handle_action(event_loop, window_id, action);
}
},
WindowEvent::CursorLeft { .. } => {
info!("Cursor left Window={window_id:?}");
window.cursor_left();
},
WindowEvent::CursorMoved { position, .. } => {
info!("Moved cursor to {position:?}");
window.cursor_moved(position);
},
WindowEvent::ActivationTokenDone { token: _token, .. } => {
#[cfg(any(x11_platform, wayland_platform))]
{
startup_notify::set_activation_token_env(_token);
if let Err(err) = self.create_window(event_loop, None) {
error!("Error creating new window: {err}");
}
}
},
WindowEvent::Ime(event) => match event {
Ime::Enabled => info!("IME enabled for Window={window_id:?}"),
Ime::Preedit(text, caret_pos) => {
info!("Preedit: {}, with caret at {:?}", text, caret_pos);
},
Ime::Commit(text) => {
info!("Committed: {}", text);
},
Ime::Disabled => info!("IME disabled for Window={window_id:?}"),
},
WindowEvent::PinchGesture { delta, .. } => {
window.zoom += delta;
let zoom = window.zoom;
if delta > 0.0 {
info!("Zoomed in {delta:.5} (now: {zoom:.5})");
} else {
info!("Zoomed out {delta:.5} (now: {zoom:.5})");
}
},
WindowEvent::RotationGesture { delta, .. } => {
window.rotated += delta;
let rotated = window.rotated;
if delta > 0.0 {
info!("Rotated counterclockwise {delta:.5} (now: {rotated:.5})");
} else {
info!("Rotated clockwise {delta:.5} (now: {rotated:.5})");
}
},
WindowEvent::PanGesture { delta, phase, .. } => {
window.panned.x += delta.x;
window.panned.y += delta.y;
info!("Panned ({delta:?})) (now: {:?}), {phase:?}", window.panned);
},
WindowEvent::DoubleTapGesture { .. } => {
info!("Smart zoom");
},
WindowEvent::TouchpadPressure { .. }
| WindowEvent::HoveredFileCancelled
| WindowEvent::KeyboardInput { .. }
| WindowEvent::CursorEntered { .. }
| WindowEvent::AxisMotion { .. }
| WindowEvent::DroppedFile(_)
| WindowEvent::HoveredFile(_)
| WindowEvent::Destroyed
| WindowEvent::Touch(_)
| WindowEvent::Moved(_) => (),
}
}
source§impl Key
impl Key
sourcepub fn to_text(&self) -> Option<&str>
pub fn to_text(&self) -> Option<&str>
Convert a key to its approximate textual equivalent.
§Examples
use winit::keyboard::{Key, NamedKey};
assert_eq!(Key::Character("a".into()).to_text(), Some("a"));
assert_eq!(Key::Named(NamedKey::Enter).to_text(), Some("\r"));
assert_eq!(Key::Named(NamedKey::F20).to_text(), None);
Trait Implementations§
source§impl<'de, Str> Deserialize<'de> for Key<Str>where
Str: Deserialize<'de>,
impl<'de, Str> Deserialize<'de> for Key<Str>where
Str: Deserialize<'de>,
source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
source§impl<Str: Ord> Ord for Key<Str>
impl<Str: Ord> Ord for Key<Str>
source§impl<Str> PartialEq<Key<Str>> for NativeKey
impl<Str> PartialEq<Key<Str>> for NativeKey
source§impl<Str> PartialEq<NamedKey> for Key<Str>
impl<Str> PartialEq<NamedKey> for Key<Str>
source§impl<Str> PartialEq<NativeKey> for Key<Str>
impl<Str> PartialEq<NativeKey> for Key<Str>
source§impl<Str: PartialEq> PartialEq for Key<Str>
impl<Str: PartialEq> PartialEq for Key<Str>
source§impl<Str: PartialOrd> PartialOrd for Key<Str>
impl<Str: PartialOrd> PartialOrd for Key<Str>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read more