/**
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
 */
import { AfterViewInit, ChangeDetectorRef, ElementRef, EventEmitter, OnDestroy } from '@angular/core';
import { Selection } from 'd3-selection';
import { ZoomBehavior } from 'd3-zoom';
import { VtsSafeAny } from '@ui-vts-kit/ng-vts/core/types';
import { VtsZoomTransform } from './interface';
import * as i0 from "@angular/core";
export declare class VtsGraphZoomDirective implements OnDestroy, AfterViewInit {
    private element;
    private cdr;
    vtsZoom?: number;
    vtsMinZoom: number;
    vtsMaxZoom: number;
    readonly vtsTransformEvent: EventEmitter<VtsZoomTransform>;
    readonly vtsZoomChange: EventEmitter<number>;
    svgSelection: Selection<VtsSafeAny, VtsSafeAny, VtsSafeAny, VtsSafeAny>;
    zoomBehavior: ZoomBehavior<VtsSafeAny, VtsSafeAny>;
    svgElement: SVGSVGElement;
    gZoomElement: SVGGElement;
    private destroy$;
    constructor(element: ElementRef, cdr: ChangeDetectorRef);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    bind(): void;
    unbind(): void;
    fitCenter(duration?: number): void;
    focus(id: VtsSafeAny, duration?: number): void;
    /**
     * Handle zoom event
     * @param transform
     */
    private zoomed;
    /**
     * Scale with zoom and duration
     * @param duration
     * @param scale
     * @private
     */
    private reScale;
    private getRelativePositionInfo;
    static ɵfac: i0.ɵɵFactoryDeclaration<VtsGraphZoomDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<VtsGraphZoomDirective, "[vts-graph-zoom]", ["vtsGraphZoom"], { "vtsZoom": { "alias": "vtsZoom"; "required": false; }; "vtsMinZoom": { "alias": "vtsMinZoom"; "required": false; }; "vtsMaxZoom": { "alias": "vtsMaxZoom"; "required": false; }; }, { "vtsTransformEvent": "vtsTransformEvent"; "vtsZoomChange": "vtsZoomChange"; }, never, never, false, never>;
}