var map;
function initMap() {
var directionsService = new google.maps.DirectionsService;
var directionsDisplay = new google.maps.DirectionsRenderer({
preserveViewport: true
});
map = new google.maps.Map(document.getElementById('map'), {
zoom: 0,
center: {
lat: 41.85,
lng: -87.65
}
});
directionsDisplay.setMap(map);
var onChangeHandler = function() {
calculateAndDisplayRoute(directionsService, directionsDisplay);
};
document.getElementById('start').addEventListener('change', onChangeHandler);
document.getElementById('end').addEventListener('change', onChangeHandler);
calculateAndDisplayRoute(directionsService, directionsDisplay);
}
function calculateAndDisplayRoute(directionsService, directionsDisplay) {
directionsService.route({
origin: document.getElementById('start').value,
destination: document.getElementById('end').value,
travelMode: 'DRIVING'
}, function(response, status) {
if (status === 'OK') {
var bounds = response.routes[0].bounds;
var leftSide = new google.maps.LatLng(bounds.getCenter().lat(), bounds.getSouthWest().lng());
var marker = new google.maps.Marker({
position: leftSide,
map: map
});
console.log(leftSide.toUrlValue(6));
google.maps.event.addListenerOnce(map, 'bounds_changed', function() {
map.setZoom(map.getZoom() - 1);
map.setCenter(leftSide);
});
map.fitBounds(bounds);
directionsDisplay.setDirections(response);
} else {
window.alert('Directions request failed due to ' + status);
}
});
}
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
#map {
height: 100%;
}
#floating-panel {
position: absolute;
top: 25%;
left: 10px;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
text-align: center;
font-family: 'Roboto', 'sans-serif';
line-height: 30px;
padding-left: 10px;
height: 50%;
opacity: 0.5;
}
<div id="floating-panel">
<b>Start: </b>
<input id="start" value="New York, NY" />
<br><b>End: </b>
<input id="end" value="Boston, MA" />
<br>
<input id="dirbtn" value="get directions" type="button" />
</div>
<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script async defer src="https://maps.googleapis.com/maps/api/js?callback=initMap">
</script>
を解決するためにハードの種類を鳴らし。たぶんアイデア:ルートの形をコピーして、その形をキャンバス要素に外挿して描画してください。 –
@EmmanuelDelayあなたの考えに感謝します。私はこの種のシナリオが[ここ](https://www.kabbee.com/quote/booking)に実装されているのを見ました。 –
関連する質問:[Google Map Markerをオフセットするにはどうすればいいですか?](http://stackoverflow.com/questions/38575327/how-do-i-offset-a-google-map-marker) – geocodezip