Added UI elements for the new drawing system
Removed old gesture system Refactored map interaction into separate component
This commit is contained in:
152
src/components/map/MapInteraction.js
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152
src/components/map/MapInteraction.js
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import React, { useRef, useEffect } from "react";
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import { Box } from "theme-ui";
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import interact from "interactjs";
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const zoomSpeed = -0.005;
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const minZoom = 0.1;
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const maxZoom = 5;
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function MapInteraction({
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map,
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aspectRatio,
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selectedTool,
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selectedToolSettings,
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children,
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controls,
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}) {
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const mapContainerRef = useRef();
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const mapMoveContainerRef = useRef();
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const mapTranslateRef = useRef({ x: 0, y: 0 });
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const mapScaleRef = useRef(1);
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function setTranslateAndScale(newTranslate, newScale) {
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const moveContainer = mapMoveContainerRef.current;
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moveContainer.style.transform = `translate(${newTranslate.x}px, ${newTranslate.y}px) scale(${newScale})`;
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mapScaleRef.current = newScale;
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mapTranslateRef.current = newTranslate;
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}
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useEffect(() => {
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function handleMove(event, isGesture) {
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const scale = mapScaleRef.current;
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const translate = mapTranslateRef.current;
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let newScale = scale;
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let newTranslate = translate;
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if (isGesture) {
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newScale = Math.max(Math.min(scale + event.ds, maxZoom), minZoom);
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}
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if (selectedTool === "pan" || isGesture) {
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newTranslate = {
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x: translate.x + event.dx,
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y: translate.y + event.dy,
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};
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}
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setTranslateAndScale(newTranslate, newScale);
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}
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const mapInteract = interact(".map")
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.gesturable({
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listeners: {
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move: (e) => handleMove(e, true),
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},
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})
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.draggable({
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inertia: true,
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listeners: {
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move: (e) => handleMove(e, false),
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},
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cursorChecker: () => {
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return selectedTool === "pan" && map ? "move" : "default";
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},
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})
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.on("doubletap", (event) => {
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event.preventDefault();
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if (selectedTool === "pan") {
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setTranslateAndScale({ x: 0, y: 0 }, 1);
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}
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});
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return () => {
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mapInteract.unset();
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};
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}, [selectedTool, map]);
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// Reset map transform when map changes
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useEffect(() => {
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setTranslateAndScale({ x: 0, y: 0 }, 1);
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}, [map]);
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// Bind the wheel event of the map via a ref
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// in order to support non-passive event listening
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// to allow the track pad zoom to be interrupted
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// see https://github.com/facebook/react/issues/14856
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useEffect(() => {
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const mapContainer = mapContainerRef.current;
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function handleZoom(event) {
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// Stop overscroll on chrome and safari
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// also stop pinch to zoom on chrome
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event.preventDefault();
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const scale = mapScaleRef.current;
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const translate = mapTranslateRef.current;
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const deltaY = event.deltaY * zoomSpeed;
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const newScale = Math.max(Math.min(scale + deltaY, maxZoom), minZoom);
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setTranslateAndScale(translate, newScale);
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}
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if (mapContainer) {
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mapContainer.addEventListener("wheel", handleZoom, {
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passive: false,
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});
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}
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return () => {
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if (mapContainer) {
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mapContainer.removeEventListener("wheel", handleZoom);
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}
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};
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}, []);
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return (
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<Box
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className="map"
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sx={{
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flexGrow: 1,
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position: "relative",
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overflow: "hidden",
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backgroundColor: "rgba(0, 0, 0, 0.1)",
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userSelect: "none",
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touchAction: "none",
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}}
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bg="background"
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ref={mapContainerRef}
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>
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<Box
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sx={{
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position: "relative",
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top: "50%",
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left: "50%",
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transform: "translate(-50%, -50%)",
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}}
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>
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<Box ref={mapMoveContainerRef}>
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<Box
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sx={{
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width: "100%",
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height: 0,
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paddingBottom: `${(1 / aspectRatio) * 100}%`,
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}}
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/>
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{children}
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</Box>
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</Box>
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{controls}
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</Box>
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);
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}
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export default MapInteraction;
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