import { Global } from '../global';
export declare class QrCodeReader {
    global: Global;
    codedata: string;
    validate: (params: IValidateParams) => Promise<boolean>;
    private startScanning;
    hasVideoAccess: boolean;
    hasQrCodeFound: boolean;
    qrValid: boolean;
    private canvasElement;
    private canvasContext;
    private video;
    private reqAnim;
    private lastCodeData;
    constructor(global: Global);
    attached(): Promise<void>;
    detached(): Promise<void>;
    startQrReader(): void;
    StopQrReader(): void;
    startScanningUpdate(newValue: any): void;
    private initQrReader;
    private drawLine;
    private drawVideoFrame;
    disableCamera(): void;
}
interface IValidateParams {
    data: string;
}
export {};