/*
 * Copyright (C) 2019 - 2026 Devexperts Solutions IE Limited
 * This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
 * If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */
import { ChartBaseElement } from '../../model/chart-base-element';
import { CanvasBoundsContainer, HitBoundsTest } from '../../canvas/canvas-bounds-container';
import { CanvasInputListenerComponent } from '../../inputlisteners/canvas-input-listener.component';
import { ScaleModel } from '../../model/scale.model';
import { Pixel, Unit } from '../../model/scaling/viewport.model';
import { ChartModel } from '../chart/chart.model';
import { DragNDropXComponent } from '../dran-n-drop_helper/drag-n-drop-x.component';
import { ChartPanComponent } from '../pan/chart-pan.component';
import { HitTestCanvasModel } from '../../model/hit-test-canvas.model';
/**
 * Handles the mouse drag on X axis - to zoom the viewport horizontally.
 * @doc-tags scaling,zoom,viewport
 */
export declare class XAxisScaleHandler extends ChartBaseElement {
    private scale;
    private canvasInputListener;
    private canvasBoundsContainer;
    private chartPanComponent;
    private chartModel;
    private hitTest;
    private hitTestCanvasModel;
    lastXStart: Unit;
    lastXEnd: Unit;
    lastXWidth: Unit;
    lastXPxWidth: Pixel;
    private dblClickCallback;
    private touches;
    private dblTapCallback;
    dragNDropXComponent: DragNDropXComponent;
    constructor(scale: ScaleModel, canvasInputListener: CanvasInputListenerComponent, canvasBoundsContainer: CanvasBoundsContainer, chartPanComponent: ChartPanComponent, chartModel: ChartModel, hitTest: HitBoundsTest, hitTestCanvasModel: HitTestCanvasModel);
    /**
     * Throttles chart-area horizontal drag to one animation frame when needed (percent Y-axis).
     */
    setChartAreaXDragThrottled(shouldThrottle: boolean): void;
    /**
     * This method is used to activate the canvas input listener and add a subscription to it.
     * It calls the parent class's doActivate method and then subscribes to the canvasInputListener's observeDbClick method.
     * The subscription is added to the RxJS subscription list.
     * When the subscription is triggered, the doBasicScale method is called.
     * @protected
     * @returns {void}
     */
    protected doActivate(): void;
    private onXDragStart;
    private onXDragTick;
    private onXDragEnd;
    setDblTapCallback: (cb: () => void) => () => void;
    setDblClickCallback: (cb: () => void) => () => void;
}