import { OverlayRef } from '@angular/cdk/overlay';
import { WtImagePreviewOptions } from './image-preview-options';
import { WtImagePreviewComponent } from './image-preview.component';
export declare class WtImagePreviewRef {
    previewInstance: WtImagePreviewComponent;
    private config;
    private overlayRef;
    private destroy$;
    constructor(previewInstance: WtImagePreviewComponent, config: WtImagePreviewOptions, overlayRef: OverlayRef);
    switchTo(index: number): void;
    next(): void;
    prev(): void;
    close(): void;
    zoomIn(): void;
    zoomOut(): void;
    rotateRight(): void;
    rotateLeft(): void;
    customAction(e: {
        action: string;
        key: string;
    }): void;
    private dispose;
}