import * as _angular_core from '@angular/core';
import { ElementRef } from '@angular/core';

/**
 * @license
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://github.com/thekhegay/ngwr/blob/main/LICENSE
 */
/**
 * QR code error correction level.
 *
 * - `'L'` — Low (~7%)
 * - `'M'` — Medium (~15%)
 * - `'Q'` — Quartile (~25%)
 * - `'H'` — High (~30%) — needed if overlaying a center icon
 */
type WrQrErrorLevel = 'L' | 'M' | 'Q' | 'H';

/**
 * Renders a QR code on a `<canvas>`.
 *
 * @example
 * ```html
 * <wr-qr value="https://ngwr.dev" [size]="200" level="H" />
 * <wr-qr value="..." iconUrl="/logo.png" [iconSize]="48" level="H" />
 * ```
 *
 * @see https://ngwr.dev/components/qrcode
 */
declare class WrQr {
    /** Text or URL to encode. Required. */
    readonly value: _angular_core.InputSignal<string>;
    /** Error correction level. Use `'H'` if you overlay an icon. @default 'M' */
    readonly level: _angular_core.InputSignal<WrQrErrorLevel>;
    /** Side length of the rendered canvas, in pixels. @default 160 */
    readonly size: _angular_core.InputSignalWithTransform<number, unknown>;
    /** Outer quiet-zone padding in pixels. @default 10 */
    readonly padding: _angular_core.InputSignalWithTransform<number, unknown>;
    /** Module (dot) color. @default '#000000' */
    readonly color: _angular_core.InputSignal<string>;
    /** Background color of the canvas + host. @default '#ffffff' */
    readonly bgColor: _angular_core.InputSignal<string>;
    /** Optional image URL or data URL to overlay in the center. */
    readonly iconUrl: _angular_core.InputSignal<string | null>;
    /** Center icon size in logical pixels. @default 42 */
    readonly iconSize: _angular_core.InputSignalWithTransform<number, unknown>;
    protected readonly canvas: _angular_core.Signal<ElementRef<HTMLCanvasElement> | undefined>;
    protected readonly isBrowser: boolean;
    constructor();
    static ɵfac: _angular_core.ɵɵFactoryDeclaration<WrQr, never>;
    static ɵcmp: _angular_core.ɵɵComponentDeclaration<WrQr, "wr-qr", never, { "value": { "alias": "value"; "required": true; "isSignal": true; }; "level": { "alias": "level"; "required": false; "isSignal": true; }; "size": { "alias": "size"; "required": false; "isSignal": true; }; "padding": { "alias": "padding"; "required": false; "isSignal": true; }; "color": { "alias": "color"; "required": false; "isSignal": true; }; "bgColor": { "alias": "bgColor"; "required": false; "isSignal": true; }; "iconUrl": { "alias": "iconUrl"; "required": false; "isSignal": true; }; "iconSize": { "alias": "iconSize"; "required": false; "isSignal": true; }; }, {}, never, never, true, never>;
}

export { WrQr };
export type { WrQrErrorLevel };