forked from MapComplete/MapComplete
69 lines
2.3 KiB
Svelte
69 lines
2.3 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> & { readonly location: UIEventSource<{ lon: number; lat: number }> };
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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 bind:this={mainElem} class="relative w-48 h-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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}}}
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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)}
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on:touchstart={e => onPosChange(e.touches[0].clientX, e.touches[0].clientY)}>
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<div class="w-full h-full absolute top-0 left-0 cursor-pointer">
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<MaplibreMap {map} attribution={false}></MaplibreMap>
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</div>
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<div bind:this={directionElem} class="absolute w-full h-full top-0 left-0">
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<ToSvelte construct={ Svg.direction_stroke_svg}>
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</ToSvelte>
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</div>
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</div>
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