import { ElementRef, EventEmitter, TemplateRef } from '@angular/core';
import { CanColor } from '@angular/material/core';
import { FormStepGroup } from './form-step-group.model';
import { FormStep } from './form-step.model';
declare class FormStepperBase {
    _elementRef: ElementRef;
    constructor(_elementRef: ElementRef);
}
declare const _FormStepperMixinBase: import("@angular/material/core/typings/common-behaviors/constructor").Constructor<CanColor> & typeof FormStepperBase;
/**
 * Vertical stepper component, ability to show step statuses and allows clicking each step.
 *
 * @export
 * @author Will Davis <will.davis@mtna.us>
 */
export declare class FormStepperComponent extends _FormStepperMixinBase implements CanColor {
    /** TemplateRefs to display either a single step or a group set of steps */
    singleStep: TemplateRef<any>;
    groupStep: TemplateRef<any>;
    /** Color for theming, can be primary, accent, or warn */
    color: 'primary' | 'accent' | 'warn';
    incompleteIcon: string;
    /** Form steps */
    steps: Array<FormStep | FormStepGroup>;
    /** When a step is selected */
    selected: EventEmitter<FormStep>;
    constructor(elementRef: ElementRef);
    /**
     * Improves effeciency of the *ngFor loop that creates the steps.
     *
     * @param index index of loop
     * @param step current step in loop
     * @returns unique string to key each item in the loop
     */
    _trackStep(index: number, step: FormStep): string;
}
export {};