i当前有一个应用程序,该应用程序将用户路由当前位置和设置目标之间。用户可以在2个旅行模式(驾驶/运输)之间交替 - 使用下拉选择。
我想更改用户如何选择从下拉列表到无线电按钮的旅行模式。但是,不确定如何更改我的JavaScript&我已经在没有运气的情况下寻找了一种方法。
html用于无线电按钮&现有(工作)选择下拉:
<div class="switch">
<input name="radio" type="radio" value="DRIVING" id="optionone" checked>
<label for="changemode-driving">Driving</label>
<input name="radio" type="radio" value="TRANSIT" id="optiontwo">
<label for="changemode-train" class="right">Train</label>
<span aria-hidden="true"></span>
</div>
//BELOW IS CURRENT METHOD OF HOW USER CHANGES TRAVEL MODE
<div id="floating-panel">
<b>Mode of Travel: </b>
<select id="mode">
<option value="DRIVING">Driving</option>
<option value="TRANSIT">Transit</option>
</select>
</div>
JavaScript:
<script>
function initMap() {
var directionsDisplay = new google.maps.DirectionsRenderer;
var directionsService = new google.maps.DirectionsService;
var lattp = <?php echo json_encode($lattp);?>;
var lngtp = <?php echo json_encode($lngtp);?>;
var zoomtp = <?php echo json_encode($zoomtp);?>;
var tp = {lat: JSON.parse(lattp), lng: JSON.parse(lngtp)};
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 14,
center: tp
});
directionsDisplay.setMap(map);
directionsDisplay.setPanel(document.getElementById('right-panel'));
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
document.getElementById('mode').addEventListener('change', function() {
calculateAndDisplayRoute(directionsService, directionsDisplay, pos);
});
calculateAndDisplayRoute(directionsService, directionsDisplay, pos);
}, function() {
handleLocationError(true, markerme);
});
} else {
// Browser doesn't support Geolocation
window.alert('Geolocation is not supported');
}
}
function calculateAndDisplayRoute(directionsService, directionsDisplay, pos) {
var selectedMode = document.getElementById('mode').value;
directionsService.route({
origin: pos, // Haight.
destination: {lat: 50.796358,lng: -1.063816}, // Ocean Beach.
// Note that Javascript allows us to access the constant
// using square brackets and a string value as its
// "property."
travelMode: google.maps.TravelMode[selectedMode],
transitOptions: {
modes: ['RAIL'],
arrivalTime: new Date(1489242600000),
routingPreference: 'FEWER_TRANSFERS'
},
unitSystem: google.maps.UnitSystem.IMPERIAL,
provideRouteAlternatives: true
}, function(response, status) {
if (status == 'OK') {
directionsDisplay.setDirections(response);
} else {
window.alert('Directions request failed due to ' + status);
}
});
}
尝试此代码。有一种方法可以将听众分配到收音机:
document.getElementsByName('radio').forEach(function(el){
el.addEventListener('click', function() {
alert($(this).val())
});
})
以及一种获取价值的方法:
var selectedMode = "";
var radios = document.getElementsByName('radio')
radios.forEach(function(element) {
if(element.checked){
selectedMode = element.value;
}
})
请注意,如果您使用jQuery,可能会更简单:无论如何,工作代码就是这样;
<script>
function initMap() {
var directionsDisplay = new google.maps.DirectionsRenderer;
var directionsService = new google.maps.DirectionsService;
var lattp = <?php echo json_encode($lattp);?>;
var lngtp = <?php echo json_encode($lngtp);?>;
var zoomtp = <?php echo json_encode($zoomtp);?>;
var tp = {lat: JSON.parse(lattp), lng: JSON.parse(lngtp)};
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 14,
center: tp
});
directionsDisplay.setMap(map);
directionsDisplay.setPanel(document.getElementById('right-panel'));
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
document.getElementsByName('radio').forEach(function(el){
el.addEventListener('click', function() {
calculateAndDisplayRoute(directionsService, directionsDisplay, pos);
});
})
calculateAndDisplayRoute(directionsService, directionsDisplay, pos);
}, function() {
handleLocationError(true, markerme);
});
} else {
// Browser doesn't support Geolocation
window.alert('Geolocation is not supported');
}
}
function calculateAndDisplayRoute(directionsService, directionsDisplay, pos) {
//var selectedMode = document.getElementById('mode').value;
var selectedMode = "";
var radios = document.getElementsByName('radio')
radios.forEach(function(element) {
if(element.checked){
selectedMode = element.value;
}
})
directionsService.route({
origin: pos, // Haight.
destination: {lat: 50.796358,lng: -1.063816}, // Ocean Beach.
// Note that Javascript allows us to access the constant
// using square brackets and a string value as its
// "property."
travelMode: google.maps.TravelMode[selectedMode],
transitOptions: {
modes: ['RAIL'],
arrivalTime: new Date(1489242600000),
routingPreference: 'FEWER_TRANSFERS'
},
unitSystem: google.maps.UnitSystem.IMPERIAL,
provideRouteAlternatives: true
}, function(response, status) {
if (status == 'OK') {
directionsDisplay.setDirections(response);
} else {
window.alert('Directions request failed due to ' + status);
}
});
}