Struct Checkbox 

pub struct Checkbox;

A toggleable checkbox component.

This component provides a boolean input that can be toggled via keyboard when focused. The checkbox emits a CheckboxOutput::Toggled message containing the new state when toggled.

Keyboard Activation

The checkbox itself doesn’t handle keyboard events directly. Your application should map Enter/Space keys to CheckboxMessage::Toggle when the checkbox is focused.

Visual States

• Unchecked: [ ] Label
• Checked: [x] Label
• Focused: Yellow text
• Disabled: Dark gray text, doesn’t respond to toggle

Example

use envision::component::{Checkbox, CheckboxMessage, CheckboxOutput, CheckboxState, Component};

let mut state = CheckboxState::new("Dark mode");

// Toggle the checkbox
let output = Checkbox::update(&mut state, CheckboxMessage::Toggle);
assert_eq!(output, Some(CheckboxOutput::Toggled(true)));
assert!(state.is_checked());

Trait Implementations

impl Component for Checkbox

type State = CheckboxState

The component’s internal state type.

type Message = CheckboxMessage

Messages this component can receive.

type Output = CheckboxOutput

Messages this component can emit to its parent.

fn init() -> Self::State

Initialize the component state.

fn update(state: &mut Self::State, msg: Self::Message) -> Option<Self::Output>

Update component state based on a message.

fn view(state: &Self::State, frame: &mut Frame<'_>, area: Rect, theme: &Theme)

Render the component to the given area.

impl Focusable for Checkbox

fn is_focused(state: &Self::State) -> bool

Returns true if this component is currently focused.

fn set_focused(state: &mut Self::State, focused: bool)

Sets the focus state of this component.

fn focus(state: &mut Self::State)

Gives focus to this component.

fn blur(state: &mut Self::State)

Removes focus from this component.