import { ElementRef } from '@angular/core';
/**
 * Adiciona o efeito "ripple" ao clicar em um elemento
 */
export declare abstract class RippleDirectiveBase {
    elementRef: ElementRef;
    private set_no_ripple;
    constructor(elementRef: ElementRef);
    no_ripple: boolean;
    /**
     * @ignore
     */
    protected _no_ripple: boolean;
    private _default_ripple_opacity;
    private _animate_timeout;
    _onClick(e: MouseEvent): void;
    private _contrast;
    private _toHexadecimal;
    private _toRGBA;
    private _padZero;
    private _relativeOffset;
}
export declare class RippleDirective extends RippleDirectiveBase {
    elementRef: ElementRef;
    constructor(elementRef: ElementRef);
}