import { ChangeDetectorRef, ElementRef, EventEmitter, OnDestroy } from '@angular/core';
import { Observable, Subject } from 'rxjs';
import { BooleanInput } from '@angular/cdk/coercion';
import * as i0 from "@angular/core";
export type ButtonType = 'primary' | 'default';
export type ButtonContent = 'icon-text' | 'icon' | 'text' | 'default';
export type ButtonShape = 'circle' | 'round' | 'default';
export type ButtonSize = 'large' | 'default' | 'small';
export interface ButtonToggleChange {
    source: ButtonComponent;
    pressed: boolean;
}
export declare class ButtonComponent implements OnDestroy {
    _elementRef: ElementRef;
    private cd;
    disabled: boolean;
    tabIndex: number | string | null;
    type: ButtonType;
    shape: ButtonShape;
    content: ButtonContent;
    size: ButtonSize;
    isToggle: boolean;
    icon: string | null;
    text: string | null;
    value: any;
    onClick(event: any): void;
    /**
     * Emits whenever button pressed state change
     **/
    readonly pressedChange: EventEmitter<boolean>;
    protected readonly _pressedChange$: Subject<ButtonToggleChange>;
    get pressedChange$(): Observable<ButtonToggleChange>;
    /**
     * Controls button pressed state
     **/
    get pressed(): boolean;
    set pressed(value: boolean);
    protected _pressed: boolean;
    static ngAcceptInputType_pressed: BooleanInput;
    private destroy$;
    constructor(_elementRef: ElementRef, cd: ChangeDetectorRef);
    _getHostElement(): any;
    ngOnDestroy(): void;
    /**
     * @docs-private
     */
    _updatePressed(value: boolean): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<ButtonComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<ButtonComponent, "button[nc-button], a[nc-button]", ["ncButton"], { "disabled": { "alias": "disabled"; "required": false; }; "tabIndex": { "alias": "tabIndex"; "required": false; }; "type": { "alias": "type"; "required": false; }; "shape": { "alias": "shape"; "required": false; }; "content": { "alias": "content"; "required": false; }; "size": { "alias": "size"; "required": false; }; "isToggle": { "alias": "isToggle"; "required": false; }; "icon": { "alias": "icon"; "required": false; }; "text": { "alias": "text"; "required": false; }; "value": { "alias": "value"; "required": false; }; }, { "pressedChange": "pressedChange"; }, never, ["*"], false, never>;
}