forked from MapComplete/MapComplete
69 lines
2.2 KiB
Svelte
69 lines
2.2 KiB
Svelte
<script lang="ts">
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import { UIEventSource } from "../../../Logic/UIEventSource"
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import type { MapProperties } from "../../../Models/MapProperties"
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import { Map as MlMap } from "maplibre-gl"
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import { MapLibreAdaptor } from "../../Map/MapLibreAdaptor"
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import MaplibreMap from "../../Map/MaplibreMap.svelte"
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import ToSvelte from "../../Base/ToSvelte.svelte"
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import Svg from "../../../Svg.js"
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/**
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* A visualisation to pick a direction on a map background.
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*/
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export let value: UIEventSource<undefined | string>
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export let mapProperties: Partial<MapProperties> & {
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readonly location: UIEventSource<{ lon: number; lat: number }>
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}
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let map: UIEventSource<MlMap> = new UIEventSource<MlMap>(undefined)
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let mla = new MapLibreAdaptor(map, mapProperties)
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mla.allowMoving.setData(false)
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mla.allowZooming.setData(false)
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let directionElem: HTMLElement | undefined
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$: value.addCallbackAndRunD((degrees) => {
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if (directionElem === undefined) {
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return
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}
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directionElem.style.rotate = degrees + "deg"
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})
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let mainElem: HTMLElement
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function onPosChange(x: number, y: number) {
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const rect = mainElem.getBoundingClientRect()
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const dx = -(rect.left + rect.right) / 2 + x
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const dy = (rect.top + rect.bottom) / 2 - y
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const angle = (180 * Math.atan2(dy, dx)) / Math.PI
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const angleGeo = Math.floor((450 - angle) % 360)
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value.setData("" + angleGeo)
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}
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let isDown = false
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</script>
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<div
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bind:this={mainElem}
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class="relative h-48 w-48 cursor-pointer overflow-hidden"
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on:click={(e) => onPosChange(e.x, e.y)}
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on:mousedown={(e) => {
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isDown = true
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onPosChange(e.clientX, e.clientY)
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}}
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on:mousemove={(e) => {
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if (isDown) {
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onPosChange(e.clientX, e.clientY)
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e.preventDefault()
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}
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}}
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on:mouseup={() => {
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isDown = false
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}}
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on:touchmove={(e) =>{ onPosChange(e.touches[0].clientX, e.touches[0].clientY); e.preventDefault() }}
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on:touchstart={(e) => onPosChange(e.touches[0].clientX, e.touches[0].clientY)}
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>
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<div class="absolute top-0 left-0 h-full w-full cursor-pointer">
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<MaplibreMap {map} attribution={false} />
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</div>
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<div bind:this={directionElem} class="absolute top-0 left-0 h-full w-full">
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<ToSvelte construct={Svg.direction_stroke_svg} />
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</div>
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</div>
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