Enum ModifierKey 

#[non_exhaustive]
pub enum ModifierKey {
    LeftShift,
    LeftCtrl,
    LeftAlt,
    LeftSuper,
    RightShift,
    RightCtrl,
    RightAlt,
    RightSuper,
    LeftHyper,
    LeftMeta,
    RightHyper,
    RightMeta,
    IsoLevel3Shift,
    IsoLevel5Shift,
}

A modifier key reported on its own (no character), e.g. a bare Ctrl press.

Mirrors crossterm’s ModifierKeyCode with SLT naming. Only delivered when the Kitty keyboard protocol is active and RunConfig::report_all_keys(true) was set, on a supporting terminal (kitty, Ghostty, WezTerm). Most terminals never emit these.

Useful for vi-style leader/chord overlays (“Ctrl is being held”) and hold-to-repeat affordances keyed off a modifier-down → modifier-up window.

Since 0.21.0.

Example

use slt::{KeyCode, ModifierKey, RunConfig};

// `report_all_keys` only has an effect with `kitty_keyboard` enabled.
let cfg = RunConfig::default().kitty_keyboard(true).report_all_keys(true);
slt::run_with(cfg, |ui| {
    if ui.key_code(KeyCode::Modifier(ModifierKey::LeftCtrl)) {
        ui.text("Left Ctrl is down");
    }
})
.unwrap();

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

LeftShift

Left Shift key.

LeftCtrl

Left Control key.

LeftAlt

Left Alt / Option key.

LeftSuper

Left Super key (Cmd on macOS, Win on Windows).

RightShift

Right Shift key.

RightCtrl

Right Control key.

RightAlt

Right Alt / Option key.

RightSuper

Right Super key (Cmd on macOS, Win on Windows).

LeftHyper

Left Hyper key.

LeftMeta

Left Meta key.

RightHyper

Right Hyper key.

RightMeta

Right Meta key.

IsoLevel3Shift

ISO Level 3 Shift key (AltGr).

IsoLevel5Shift

ISO Level 5 Shift key.

Trait Implementations

impl Clone for ModifierKey

fn clone(&self) -> ModifierKey

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ModifierKey

impl Debug for ModifierKey

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ModifierKey

impl PartialEq for ModifierKey

fn eq(&self, other: &ModifierKey) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ModifierKey