import { ComponentFactoryResolver, ComponentRef, OnChanges, OnDestroy, SimpleChange, SimpleChanges, Type, ViewContainerRef } from '@angular/core';
import * as i0 from "@angular/core";
export declare abstract class UiLoaderButtonDirective<T> implements OnChanges, OnDestroy {
    private _componentFactory;
    private _container;
    protected _loader: T;
    protected _loaderElement: HTMLElement;
    protected _loaderRef: ComponentRef<T>;
    protected get _buttonElement(): HTMLButtonElement;
    private _watchers;
    constructor(loaderType: Type<T>, _componentFactory: ComponentFactoryResolver, _container: ViewContainerRef);
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    protected _initialize(): void;
    protected _registerWatcher: (key: string, action: () => void) => void;
    protected _createLoader: (type: Type<T>) => ComponentRef<T>;
    protected _doIfChange: (change: SimpleChange, action: () => void) => void;
    static ɵfac: i0.ɵɵFactoryDeclaration<UiLoaderButtonDirective<any>, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<UiLoaderButtonDirective<any>, never, never, {}, {}, never, never, false, never>;
}