Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | 1x 1x 1x 10x 10x | import * as React from "react"; import { pan, TSetZoomPanSettings, zoom } from "../utils/zoomAndPan"; import { useWindowEvent } from "./useWindowEvent"; interface IUseWheelHandlersOptions { svgRef: React.RefObject<SVGSVGElement>; setZoomPanSettings: TSetZoomPanSettings; getIsCanvasFocused(): boolean; } export const useWheelHandlers = (options: IUseWheelHandlersOptions) => { const onContainerWheel = (evt: WheelEvent) => { if (!options.getIsCanvasFocused()) { return; } evt.stopPropagation(); evt.preventDefault(); if (evt.ctrlKey) { const scale = evt.deltaY > 0 ? 1.1 : 0.9; zoom(scale, options.svgRef, options.setZoomPanSettings.bind(undefined)); } else { pan( 0, evt.deltaY < 0 ? 100 : -100, options.setZoomPanSettings.bind(undefined) ); } }; useWindowEvent("wheel", onContainerWheel, { passive: false }); }; |