[英]Javascript, set variable from contents of text box
我正在嘗試使此Google Maps距離計算器適應我的需要,但對純Javascript和僅Jquery不太熟悉。
我試圖修改目標變量之一,以便將其從文本框中拉出。 通常該行顯示為:
var destinationA = 'pe219px';
但是我試圖將其更改為以下內容,通常我會使用keyup函數來做到這一點,以在jquery中的人員輸入時更新值,但是我不確定自己在純JavaScript中做什么。 到目前為止,這是我想出的,但似乎沒有做很多事情:
function setValue() {
destinationA=parseInt(document.getElementById('deliverypostcode').value);
}
這是我嘗試修改https://developers.google.com/maps/documentation/javascript/examples/distance-matrix的示例
這是整個代碼:
<!DOCTYPE html>
<html>
<head>
<title>Distance Matrix service</title>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<style>
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#map-canvas {
height: 100%;
width: 50%;
}
#content-pane {
float:right;
width:48%;
padding-left: 2%;
}
#outputDiv {
font-size: 11px;
}
</style>
<script>
var map;
var geocoder;
var bounds = new google.maps.LatLngBounds();
var markersArray = [];
var origin1 = new google.maps.LatLng(53.003604, -0.532764);
var origin2 = 'pe219px';
function setValue() {
destinationA=parseInt(document.getElementById('deliverypostcode').value);
}
var destinationB = new google.maps.LatLng(53.003604, -0.532764);
var destinationIcon = 'https://chart.googleapis.com/chart?chst=d_map_pin_letter&chld=D|FF0000|000000';
var originIcon = 'https://chart.googleapis.com/chart?chst=d_map_pin_letter&chld=O|FFFF00|000000';
function initialize() {
var opts = {
center: new google.maps.LatLng(53.003604, -0.532764),
zoom: 8
};
map = new google.maps.Map(document.getElementById('map-canvas'), opts);
geocoder = new google.maps.Geocoder();
}
function calculateDistances() {
var service = new google.maps.DistanceMatrixService();
service.getDistanceMatrix(
{
origins: [origin1, origin2],
destinations: [destinationA, destinationB],
travelMode: google.maps.TravelMode.DRIVING,
unitSystem: google.maps.UnitSystem.IMPERIAL,
avoidHighways: false,
avoidTolls: false
}, callback);
}
function callback(response, status) {
if (status != google.maps.DistanceMatrixStatus.OK) {
alert('Error was: ' + status);
} else {
var origins = response.originAddresses;
var destinations = response.destinationAddresses;
var outputDiv = document.getElementById('outputDiv');
outputDiv.innerHTML = '';
deleteOverlays();
for (var i = 0; i < origins.length; i++) {
var results = response.rows[i].elements;
addMarker(origins[i], false);
for (var j = 0; j < results.length; j++) {
addMarker(destinations[j], true);
outputDiv.innerHTML += origins[i] + ' to ' + destinations[j]
+ ': ' + results[j].distance.text + '<br>';
}
}
}
}
function addMarker(location, isDestination) {
var icon;
if (isDestination) {
icon = destinationIcon;
} else {
icon = originIcon;
}
geocoder.geocode({'address': location}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
bounds.extend(results[0].geometry.location);
map.fitBounds(bounds);
var marker = new google.maps.Marker({
map: map,
position: results[0].geometry.location,
icon: icon
});
markersArray.push(marker);
} else {
alert('Geocode was not successful for the following reason: '
+ status);
}
});
}
function deleteOverlays() {
for (var i = 0; i < markersArray.length; i++) {
markersArray[i].setMap(null);
}
markersArray = [];
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="content-pane">
<div id="inputs">
<form name="form1" method="post" action="">
<label for="deliverypostcode">Your Postcode</label>
<input type="text" name="deliverypostcode" id="deliverypostcode">
</form>
<p><button type="button" onclick="calculateDistances();">Calculate
distances</button></p>
</div>
<div id="outputDiv"></div>
</div>
<div id="map-canvas"></div>
</body>
</html>
您的函數setValue永遠不會被調用。
如果刪除它,然后將以下行放在calculateDistances的開頭怎么辦?
var destinationA= document.getElementById('deliverypostcode').value;
這對我有用。 另外,您不需要parseInt您的文本輸入。 地理編碼會將字符串轉換為緯度/經度坐標。
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