I.Ubaid I.Ubaid - 4 months ago 92
Javascript Question

How to stop a moving marker on Google map?

these are my basic functions:

function autoRefresh(map) {
var i;
route = new google.maps.Polyline({
path: [],
geodesic : true,
strokeColor: '#000000',
strokeOpacity: 1.0,
strokeWeight: 2,
editable: false,
map:map
});
marker1=new google.maps.Marker({map:map,icon:'http://maps.google.com/mapfiles/ms/micons/blue.png'});
for (i = 0; i < pathCoords.length; i++) {
setTimeout(function (coords)
{
var latlng = new google.maps.LatLng(coords.lat, coords.lng);
route.getPath().push(latlng);
moveMarker(map, marker1, latlng);
}, 300 * i, pathCoords[i]);
}
}

function stop() {
route.setMap(null);
marker1.setMap(null);
marker1 = [];
}


autoRefresh() is my function to start marker movement and stop() is to stop the movement. It works perfectly till I click start and stop buttons for first time. After clicking the stop button (before the marker completes its route) when I click start button, I want the marker to start from starting position as a new marker but it moves weirdly, joining the last position it was on and draws zigzag lines. Please help me, thanking you in advance.

fiddle

code snippet:



var marker1, map, route;

function initialize() {
map = new google.maps.Map(document.getElementById("map"), {
center: {
lat: pathCoords[0].lat,
lng: pathCoords[0].lng
},
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
});

var marker = new google.maps.Marker({
position: new google.maps.LatLng(8.893260000000001, 76.61427),
map: map
});
var marker = new google.maps.Marker({
position: new google.maps.LatLng(8.52426, 76.93668000000001),
map: map,
icon: 'http://maps.google.com/mapfiles/ms/micons/blue.png'
});

//autoRefresh(map);
}

function moveMarker(map, marker1, latlng) {
marker1.setPosition(latlng);
map.panTo(latlng);
}

function autoRefresh(map) {
var i;
route = new google.maps.Polyline({
path: [],
geodesic: true,
strokeColor: '#000000',
strokeOpacity: 1.0,
strokeWeight: 2,
editable: false,
map: map
});



marker1 = new google.maps.Marker({
map: map,
icon: 'http://maps.google.com/mapfiles/ms/micons/blue.png'
});
for (i = 0; i < pathCoords.length; i++) {
setTimeout(function(coords) {
var latlng = new google.maps.LatLng(coords.lat, coords.lng);
route.getPath().push(latlng);
moveMarker(map, marker1, latlng);
}, 300 * i, pathCoords[i]);
}
}

function stop() {
route.setMap(null);
marker1.setMap(null);
marker1 = [];
}

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"lat": 8.893260000000001,
"lng": 76.61427
},
{
"lat": 8.894430000000002,
"lng": 76.61418
},
{
"lat": 8.89484,
"lng": 76.61416000000001
},
{
"lat": 8.894860000000001,
"lng": 76.61383000000001
},
{
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},
{
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},
{
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},
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},
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{
"lat": 8.52426,
"lng": 76.93668000000001
}];

google.maps.event.addDomListener(window, 'load', initialize);

html,
body,
#map {
height: 100%;
width: 100%;
}

<script src="https://maps.google.com/maps/api/js"></script>
<br>
<br>
<input onclick="autoRefresh(map);" type=button value="Start">
<input onclick="stop();" type=button value="Stop">
<br>
<br>
<div id="map"></div>




Answer

You need to keep references to all the timers you create and cancel them all.

var timers = [];
function autoRefresh(map) {
  var i;
  route = new google.maps.Polyline({
            path: [],
            geodesic : true,
            strokeColor: '#000000',
            strokeOpacity: 1.0,
            strokeWeight: 2,
            editable: false,
            map:map
        });



        marker1=new google.maps.Marker({map:map,icon:'http://maps.google.com/mapfiles/ms/micons/blue.png'});
        for (i = 0; i < pathCoords.length; i++) {
            var timerhandle = setTimeout(function (coords)
            {
                var latlng = new google.maps.LatLng(coords.lat, coords.lng);
                route.getPath().push(latlng);
                moveMarker(map, marker1, latlng);
            }, 300 * i, pathCoords[i]);
            timers.push(timerhandle);
        }
    }

function stop() {
  for (var i=0; i< timers.length; i++) {
    clearTimeout(timers[i]);
  }
  route.setMap(null);
  marker1.setMap(null);
  marker1 = [];
}

updated fiddle

code snippet:

var marker1, map, route, timerhandle;
var timers = [];
function initialize() {
			  map = new google.maps.Map(document.getElementById("map"), {
			  center: {lat: pathCoords[0].lat, lng: pathCoords[0].lng},
			  zoom: 13,
			  mapTypeId: google.maps.MapTypeId.ROADMAP
			});

			var marker = new google.maps.Marker({position:new google.maps.LatLng(24.94676383440351, 67.13702201843262),
			map:map});
			var marker = new google.maps.Marker({position:new google.maps.LatLng(24.94276562875255, 67.18474388122559), map:map,
			icon: 'http://maps.google.com/mapfiles/ms/micons/blue.png'
			});

			//autoRefresh(map);
		}

		function moveMarker(map, marker1, latlng) {
			marker1.setPosition(latlng);
			map.panTo(latlng);
		}
		function autoRefresh(map) {
			var i;
			route = new google.maps.Polyline({
				path: [],
				geodesic : true,
				strokeColor: '#000000',
				strokeOpacity: 1.0,
				strokeWeight: 2,
				editable: false,
				map:map
			});
			
			

			marker1=new google.maps.Marker({map:map,icon:'http://maps.google.com/mapfiles/ms/micons/blue.png'});
			for (i = 0; i < pathCoords.length; i++) {
				var timerhandle = setTimeout(function (coords)
				{
					var latlng = new google.maps.LatLng(coords.lat, coords.lng);
					route.getPath().push(latlng);
					moveMarker(map, marker1, latlng);
				}, 300 * i, pathCoords[i]);
                timers.push(timerhandle);
			}
		}

		function stop() {
            for (var i=0; i< timers.length; i++) {
                clearTimeout(timers[i]);
            }
  			route.setMap(null);
			marker1.setMap(null);
			marker1 = [];
		}

		var pathCoords = [
			{
			"lat": 24.94676383440351,
			"lng": 67.13702201843262
			},
			{
			"lat": 24.945829958568236,
			"lng": 67.13824510574341
			},
			{
			"lat": 24.94567431190732,
			"lng": 67.13839530944824
			},
			{
			"lat": 24.946121795527365,
			"lng": 67.13893175125122
			},
			{
			"lat": 24.946744378729154,
			"lng": 67.13951110839844
			},
			{
			"lat": 24.947308592037547,
			"lng": 67.14011192321777
			},
			{
			"lat": 24.94783389175996,
			"lng": 67.1405839920044
			},
			{
			"lat": 24.948417555490515,
			"lng": 67.14116334915161
			},
			{
			"lat": 24.94902067177291,
			"lng": 67.14184999465942
			},
			{
			"lat": 24.949740516372685,
			"lng": 67.14257955551147
			},
			{
			"lat": 24.94909849301358,
			"lng": 67.14345932006836
			},
			{
			"lat": 24.948631564832016,
			"lng": 67.14403867721558
			},
			{
			"lat": 24.948106268511754,
			"lng": 67.14472532272339
			},
			{
			"lat": 24.94752260330603,
			"lng": 67.14545488357544
			},
			{
			"lat": 24.946783290074784,
			"lng": 67.14635610580444
			},
			{
			"lat": 24.945907781824943,
			"lng": 67.14740753173828
			},
			{
			"lat": 24.944993355453292,
			"lng": 67.14860916137695
			},
			{
			"lat": 24.943709255897694,
			"lng": 67.15015411376953
			},
			{
			"lat": 24.941763625005482,
			"lng": 67.15279340744019
			},
			{
			"lat": 24.940401665098086,
			"lng": 67.15451002120972
			},
			{
			"lat": 24.939309654225738,
			"lng": 67.15601205825806
			},
			{
			"lat": 24.939275604733375,
			"lng": 67.15608447790146
			},
			{
			"lat": 24.939239123123972,
			"lng": 67.1561998128891
			},
			{
			"lat": 24.939275604733375,
			"lng": 67.15641438961029
			},
			{
			"lat": 24.939331543180167,
			"lng": 67.15677112340927
			},
			{
			"lat": 24.939565025118608,
			"lng": 67.157261967659
			},
			{
			"lat": 24.94012927130989,
			"lng": 67.15838849544525
			},
			{
			"lat": 24.940328702535293,
			"lng": 67.15898394584656
			},
			{
			"lat": 24.940338430879503,
			"lng": 67.15927362442017
			},
			{
			"lat": 24.940260604104388,
			"lng": 67.16037333011627
			},
			{
			"lat": 24.940231419051027,
			"lng": 67.1607381105423
			},
			{
			"lat": 24.940343295051314,
			"lng": 67.16156959533691
			},
			{
			"lat": 24.94059623172093,
			"lng": 67.16286242008209
			},
			{
			"lat": 24.940868624476717,
			"lng": 67.164106965065
			},
			{
			"lat": 24.941213978712003,
			"lng": 67.16572701931
			},
			{
			"lat": 24.94161283732836,
			"lng": 67.16765820980072
			},
			{
			"lat": 24.9421478895418,
			"lng": 67.17001855373383
			},
			{
			"lat": 24.942318132940574,
			"lng": 67.17079639434814
			},
			{
			"lat": 24.942770492828537,
			"lng": 67.17302799224854
			},
			{
			"lat": 24.943203394821786,
			"lng": 67.17518985271454
			},
			{
			"lat": 24.94359251891071,
			"lng": 67.17712104320526
			},
			{
			"lat": 24.943864905041604,
			"lng": 67.17803835868835
			},
			{
			"lat": 24.944969035510336,
			"lng": 67.17934727668762
			},
			{
			"lat": 24.94623853011741,
			"lng": 67.18083322048187
			},
			{
			"lat": 24.946885432298547,
			"lng": 67.1815949678421
			},
			{
			"lat": 24.94726481695956,
			"lng": 67.1820455789566
			},
			{
			"lat": 24.94776336553854,
			"lng": 67.18263298273087
			},
			{
			"lat": 24.94821813736032,
			"lng": 67.1832150220871
			},
			{
			"lat": 24.949594602266778,
			"lng": 67.18494772911072
			},
			{
			"lat": 24.950115028453187,
			"lng": 67.18566656112671
			},
			{
			"lat": 24.949983706165003,
			"lng": 67.18631565570831
			},
			{
			"lat": 24.949993433746716,
			"lng": 67.18661069869995
			},
			{
			"lat": 24.95001775269762,
			"lng": 67.18688428401947
			},
			{
			"lat": 24.94977942677173,
			"lng": 67.18697547912598
			},
			{
			"lat": 24.949623785101817,
			"lng": 67.18683063983917
			},
			{
			"lat": 24.94943896036326,
			"lng": 67.18671262264252
			},
			{
			"lat": 24.94925413534736,
			"lng": 67.18659996986389
			},
			{
			"lat": 24.94814517942712,
			"lng": 67.18636393547058
			},
			{
			"lat": 24.946627644618534,
			"lng": 67.18611717224121
			},
			{
			"lat": 24.94444858757967,
			"lng": 67.18583822250366
			},
			{
			"lat": 24.942609978219703,
			"lng": 67.18559145927429
			},
			{
			"lat": 24.94276562875255,
			"lng": 67.18474388122559
			}
		];

google.maps.event.addDomListener(window, 'load', initialize);
html,
body,
#map {
  height: 100%;
  width: 100%;
}
<script src="https://maps.google.com/maps/api/js"></script>
<br>
<br>
<input onclick="autoRefresh(map);" type=button value="Start">
<input onclick="stop();" type=button value="Stop">
<br>
<br>
<div id="map"></div>