80 lines
3.2 KiB
JavaScript
80 lines
3.2 KiB
JavaScript
(function () {
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var tileUrl = 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png';
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var tileAttribution = 'Map data © <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>';
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// Global export
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window.deliveryMap = {
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showOrUpdate: function (elementId, markers) {
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var elem = document.getElementById(elementId);
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if (!elem) {
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throw new Error('No element with ID ' + elementId);
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}
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// Initialize map if needed
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if (!elem.map) {
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elem.map = L.map(elementId);
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elem.map.addedMarkers = [];
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L.tileLayer(tileUrl, { attribution: tileAttribution }).addTo(elem.map);
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}
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var map = elem.map;
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if (map.addedMarkers.length !== markers.length) {
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// Markers have changed, so reset
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map.addedMarkers.forEach(marker => marker.removeFrom(map));
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map.addedMarkers = markers.map(m => {
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return L.marker([m.y, m.x]).bindPopup(m.description).addTo(map);
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});
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// Auto-fit the view
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var markersGroup = new L.featureGroup(map.addedMarkers);
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map.fitBounds(markersGroup.getBounds().pad(0.3));
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// Show applicable popups. Can't do this until after the view was auto-fitted.
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markers.forEach((marker, index) => {
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if (marker.showPopup) {
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map.addedMarkers[index].openPopup();
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}
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});
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} else {
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// Same number of markers, so update positions/text without changing view bounds
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markers.forEach((marker, index) => {
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animateMarkerMove(
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map.addedMarkers[index].setPopupContent(marker.description),
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marker,
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4000);
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});
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}
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}
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};
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function animateMarkerMove(marker, coords, durationMs) {
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if (marker.existingAnimation) {
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cancelAnimationFrame(marker.existingAnimation.callbackHandle);
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}
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marker.existingAnimation = {
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startTime: new Date(),
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durationMs: durationMs,
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startCoords: { x: marker.getLatLng().lng, y: marker.getLatLng().lat },
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endCoords: coords,
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callbackHandle: window.requestAnimationFrame(() => animateMarkerMoveFrame(marker))
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};
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}
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function animateMarkerMoveFrame(marker) {
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var anim = marker.existingAnimation;
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var proportionCompleted = (new Date().valueOf() - anim.startTime.valueOf()) / anim.durationMs;
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var coordsNow = {
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x: anim.startCoords.x + (anim.endCoords.x - anim.startCoords.x) * proportionCompleted,
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y: anim.startCoords.y + (anim.endCoords.y - anim.startCoords.y) * proportionCompleted
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};
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marker.setLatLng([coordsNow.y, coordsNow.x]);
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if (proportionCompleted < 1) {
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marker.existingAnimation.callbackHandle = window.requestAnimationFrame(
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() => animateMarkerMoveFrame(marker));
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}
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}
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})();
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