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🔧 Memoize mapArea

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This commit is contained in:
Steffo 2021-05-25 15:58:52 +02:00
parent 4f274fa9af
commit c61f764c16
Signed by: steffo
GPG key ID: 6965406171929D01
1 changed files with 5 additions and 2 deletions
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7
nest_frontend/hooks/useMapAreaState.js
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@ -1,4 +1,4 @@
import { useState } from "react" import { useMemo, useState } from "react"
import Coordinates from "../objects/Coordinates" import Coordinates from "../objects/Coordinates"
import MapArea from "../objects/MapArea" import MapArea from "../objects/MapArea"
@ -9,7 +9,10 @@ import MapArea from "../objects/MapArea"
export default function useMapAreaState() { export default function useMapAreaState() {
const [zoom, setZoom] = useState(3) const [zoom, setZoom] = useState(3)
const [center, setCenter] = useState(new Coordinates(0, 0)) const [center, setCenter] = useState(new Coordinates(0, 0))
const mapArea = MapArea.fromZoomLevel(zoom, center) const mapArea = useMemo(
() => MapArea.fromZoomLevel(zoom, center),
[zoom, center]
)
return { return {
zoom, zoom,