import { EventEmitter } from '../../stencil-public-runtime';
import type { CheckboxChangeDetail, CheckboxSize } from './mud-checkbox.types';
/**
 * Checkbox — boolean / tri-state form control.
 *
 * Pattern B (atom-interactive, form-associated): renders its own visual box
 * inside shadow DOM plus a screen-reader-friendly `<input type="checkbox">`.
 * Form participation works via `formAssociated` + `ElementInternals`.
 *
 * Visual states mirror Figma `Mode × State × Size`:
 *   Mode  = Unchecked | Checked | Indeterminate
 *   State = Default | Focus | Error (`invalid`) | Disabled
 *   Size  = Medium (24px) | Small (20px)
 *
 * Indeterminate is a visual-only third state — `checked` semantics are unchanged.
 *
 * @element mud-checkbox
 *
 * @slot label - Rich label content. Replaces the `label` prop when present.
 * @slot supporting-text - Rich supporting/helper text below the label.
 */
export declare class MudCheckbox {
    /**
     * Visual size rung.
     * @default 'md'
     */
    size: CheckboxSize;
    /**
     * Checked state. Mutable — toggled by user interaction and reflected as the
     * `checked` host attribute. Read in `change` listeners via `event.target.checked`.
     * @default false
     */
    checked: boolean;
    /**
     * Tri-state visual marker. When `true`, the box renders a dash glyph
     * regardless of `checked`. Indeterminate is a purely visual hint —
     * the submitted form value still follows `checked`.
     * @default false
     */
    indeterminate: boolean;
    /**
     * Disables interactivity. Sets `aria-disabled` and the native `disabled`.
     * @default false
     */
    disabled: boolean;
    /**
     * Forces destructive visuals (red border, red fill on checked).
     * Sets `aria-invalid="true"`.
     * @default false
     */
    invalid: boolean;
    /**
     * Marks the field as mandatory for form validation.
     * Adds `aria-required="true"`.
     * @default false
     */
    required: boolean;
    /**
     * Renders read-only — checkbox keeps focus but ignores toggles.
     * @default false
     */
    readonly: boolean;
    /** Form-control `name`. Used during form submission. */
    name?: string;
    /** Form value submitted when `checked`. Defaults to `'on'` like native checkboxes. */
    value?: string;
    /**
     * Accessible-name fallback. Used as `aria-label` on the internal input
     * when no `label` slot is provided. Does NOT render visible text — use
     * the `label` slot for that. Matches the `mud-button` convention.
     */
    label?: string;
    /**
     * Accessible-description fallback. Reserved for future use as
     * `aria-describedby` source when no `supporting-text` slot is provided.
     * Does NOT render visible text — use the `supporting-text` slot for that.
     */
    supportingText?: string;
    /**
     * Plain-text error message shown below the label when `invalid` is set.
     * Pairs with the `circle-error-filled` icon and is wired to the control via
     * `aria-describedby`. When present (and `invalid`) it replaces the supporting
     * text. Mirrors the `errorText` convention of `mud-input` / `mud-textarea`.
     */
    errorText?: string;
    /** Accessible name override. Used when no visible label is present. */
    ariaLabel?: string;
    /** Accessible name id reference. Forwarded to the internal control. */
    ariaLabelledby?: string;
    private hasLabelSlot;
    private hasSupportingSlot;
    private isFocused;
    private fieldsetDisabled;
    host: HTMLMudCheckboxElement;
    internals: ElementInternals;
    /** Fires when `checked` (or `indeterminate`) changes from a user action. */
    mudChange: EventEmitter<CheckboxChangeDetail>;
    /** Fires when the control gains focus. The native `FocusEvent` is forwarded as-is. */
    mudFocus: EventEmitter<FocusEvent>;
    /** Fires when the control loses focus. The native `FocusEvent` is forwarded as-is. */
    mudBlur: EventEmitter<FocusEvent>;
    private readonly instanceId;
    private readonly labelId;
    private readonly supportingId;
    private readonly errorId;
    private initialChecked;
    private nativeRef?;
    validateSize(next: CheckboxSize): void;
    handleCheckedChange(next: boolean): void;
    handleRequiredChange(): void;
    componentWillLoad(): void;
    componentDidLoad(): void;
    componentDidUpdate(): void;
    /** Mirrors `disabled` from an ancestor `<fieldset disabled>` without clobbering the consumer-set prop. */
    formDisabledCallback(disabled: boolean): void;
    formResetCallback(): void;
    formStateRestoreCallback(state: string | File | FormData | null): void;
    private syncFormValue;
    private updateValidity;
    private applyIndeterminate;
    private onLabelSlotChange;
    private onSupportingSlotChange;
    private slotHasContent;
    private handleChange;
    private handleFocus;
    private handleBlur;
    private isInert;
    private hasErrorMessage;
    render(): any;
    private renderGlyph;
}