gl2d/tool/wheelZoom.d.ts

2D graphics package for WebGL

import { _SurfaceWheelEvent } from '../event/scroll';
import { _WheelTool } from './wheel';
/**
 * Tool for zooming in and out of a surface based on scroll events and cursor position.
 */
export declare class WheelZoomTool implements _WheelTool {
    /**
     * The scale applied to the surface when zooming in. The inverse is applied when zooming out.
     */
    scaleFactor: number;
    /**
     * The minimum number of milliseconds that must elapse between scroll events in order for the scale to be applied.
     */
    minTimeElapse: number;
    /**
     * The time of the last scale in milliseconds.
     */
    timeOfLastScale: number;
    /**
     * @param scaleFactor The scale applied to the surface whene scrolling in. The inverse is applied when scrolling out.
     * @param minTimeEllapse The minimum number of milliseconds that must elapse between scroll events in order for the scale to be applied.
     */
    constructor(scaleFactor: number, minTimeElapse: number);
    onSurfaceEvent(event: _SurfaceWheelEvent): void;
}