Leaflet Map elements sit in DOM but don't render? - leaflet

Leaflet is rendering because I can see all of its elements in the DOM, but nothing else comes to life. All I see is gray.
The only way I can get map tiles to appear is if I delete the position:absolute on the map container, but that creates a bunch of jumbled map tiles. I checked the GIT history to see if I accidentally changed a style, but no luck.
Here's the code initializing the map:
// init everything on page show
$("#map").live('pageshow',function() {
if(window.localStorage.getItem("lat")!=undefined) { var lat = window.localStorage.getItem("lat")} else { var lat = '49.264'; }
if(window.localStorage.getItem("lng")!=undefined) { var lng = window.localStorage.getItem("lng")} else { var lng = '-123.123'; }
try {
var map = window.map
map = new L.Map('map-container');
var cloudmadeUrl = 'http://{s}.tile.cloudmade.com/006282296d334e66a593e55aca6b5ce0/54803/256/{z}/{x}/{y}.png';
var cloudmadeAttribution = 'Map Data © 2011 OpenStreetMap';
var cloudmade = new L.TileLayer(cloudmadeUrl, {maxZoom: 18, attribution: cloudmadeAttribution});
map.setView(new L.LatLng(lat, lng), 12).addLayer(cloudmade);
map.invalidateSize();
} catch(e) {console.log(e)}
userMarkers[1] = new L.Marker( new L.LatLng( lat,lng ) , {icon: new iconUser, clickable: true} );
map.addLayer( userMarkers[1] );
});
The environment includes jQuery mobile. Unfortunately, the console does not log any errors and the localStorage above indeed holds valid LatLng values when I inspect it.
A screenshot:
Any guesses?

I'm not sure how the problem started, but to fix it I went and erased all map container styles and then declared:
#map-container {
position:absolute;
top:0;
bottom:0;
left:0;
right:0;
margin: 0;
padding: 0;
}
And now the problem is fixed. I've never used such styling before so I cannot speculate on how the problem started.

Related

MapQuest/Leaflet - How to trace routes between marquers with gps coordinates?

I have managed to integrate mapquest within my leaflet maps which was initially showing markers on the map. Below is an example with markers showing photographs taking during a trip in Namibia.
https://www.paulgodard.com/map?c=2108_DesolationValley&p=travel&m=images
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Routes between marquers with gps coordinates
1 post / 0 new
Quick reply
Thu, 08/19/2021 - 06:10
#1
Paul Godard
Routes between marquers with gps coordinates
I have managed to integrate mapquest within my leaflet maps which was initially showing markers on the map. Below is an example with markers showing photographs taking during a trip in Namibia.
https://www.paulgodard.com/map?c=2108_DesolationValley&p=travel&m=images
I already have an array of locations and I would like to display the routes in between each marker. What is the best way to do this?
window.mapData = #json($mapData);
window.onload = function() {
L.mapquest.key = 'mykey';
var map = L.mapquest.map('mapOSM', {
center: [0,0],
layers: L.mapquest.tileLayer('map'),
zoom: 10
});
map.addControl(L.mapquest.control());
var mainIcon = L.Icon.extend({ options: {
iconSize: [24,24],
iconAnchor: [12,24], // half of x | full y
popupAnchor: [0,-12] // x = 0 | - half y
}});
var oms = new OverlappingMarkerSpiderfier(map);
var bounds = new L.LatLngBounds();
for (var i = 0; i < window.mapData.length; i ++) {
var datum = window.mapData[i];
var loc = new L.LatLng(datum.lat, datum.lon);
bounds.extend(loc);
var mapIconURL = '/public/assets/icons/' + datum.icon;
mapIconURL = mapIconURL.replace(/\s+/g,'');
var marker = new L.Marker(loc, { icon: new mainIcon({iconUrl: mapIconURL}) });
marker.desc = datum.popup; //JSON.parse(datum.popup);
//if ($i=0) { alert(datum.popup); }
map.addLayer(marker);
oms.addMarker(marker);
}
if (window.mapData.length > 0) {
map.fitBounds(bounds);
} else {
map.center(window.mapData[0].lat,window.mapData[0].lon);
map.zoom(1);
}
var popup = new L.Popup({closeButton: false, offset: new L.Point(0.5, -24)});
oms.addListener('click', function(marker) {
popup.setContent(marker.desc);
popup.setLatLng(marker.getLatLng());
map.openPopup(popup);
});
oms.addListener('spiderfy', function(markers) { map.closePopup(); });
oms.addListener('unspiderfy', function(markers) { });
}
You can start with the Leaflet Routing Plugin here: https://developer.mapquest.com/documentation/leaflet-plugins/routing/
Routing in Namibia might get iffy though.

leaflet routing.control update when marker is moved

I am using leaflet and routing.control to show a route. I have it working fine, but I would like one of the markers to move with the users location using watch.position. But for now I a just trying to move the marker when I click a button. Again this works fine but when the marker moves I would like the route to update automatically. Its possible if you drag the marker so surely its possible when marker is moved in a different way? I can it if I remove the control and add a new one but this flickers too much. Any advice?
The code for the routing.control is
myroute = L.Routing.control({
waypoints: [
L.latLng(window.my_lat, window.my_lng),
L.latLng(window.job_p_lat, window.job_p_lng)
],show: true, units: 'imperial',
router: L.Routing.mapbox('API KEY HERE'),
createMarker: function(i, wp, nWps) {
if (i === 0 || i === nWps + 1) {
return mymarker = L.marker(wp.latLng, {
icon: redIcon
});
} else {
return job_start = L.marker(wp.latLng, {
icon: greenIcon
});
}
}
}).addTo(map);
and the code for moving the marker is
function movemarker() {
var lat = "52.410490";
var lng = "-1.575950";
var newLatLng = new L.LatLng(lat, lng);
mymarker.setLatLng(newLatLng);
// I assume I call something here?
}
Sorted, I did it with this, which removes first point and replaces it with new data
myroutewithout.spliceWaypoints(0, 1, newLatLng);

Leaflet & Mapbox: OpenPopup not working

I've an issue with the leaflet openPopup method.
showMap = function(elements) {
var jsonp = 'http://a.tiles.mapbox.com/v3/blahblahblah.jsonp';
var m = new L.Map("my_map").setView(new L.LatLng(51.5, -0.09), 15);
var geojsonLayer = new L.GeoJSON();
var PlaceIcon = L.Icon.extend({
iconSize: new L.Point(25, 41),
shadowSize: new L.Point(40, 35),
popupAnchor: new L.Point(0, -30)
});
var icon = new PlaceIcon(__HOME__ + '/images/leaflet/marker.png');
var marker;
for (var i = 0; i < elements.length; i++) {
var address = $("<div/>").html(elements[i].address).text();
var latlng = new L.LatLng(elements[i].latitude, elements[i].longitude);
marker = new L.Marker(latlng, {icon: icon}).bindPopup(address);
if (i == 0) {
marker.openPopup();
}
m.addLayer(geojsonLayer).addLayer(marker);
}
// Get metadata about the map from MapBox
wax.tilejson(jsonp, function(tilejson) {
m.addLayer(new wax.leaf.connector(tilejson));
});
}
When I click on a marker I have the popup open. But I would like to have the first popup open when the map is loaded. (and open other popups on markers click)
AnNy ideas ?
Put openPopup call after you add the marker to the map and you should be fine.
I'm assuming that when you click on a marker you see the popup but you're not getting the popup of the first marker to show automatically when the map is loaded?
First, it doesn't look like you're actually using GeoJSON so a GeoJSON layer isn't necessary (you can just use a FeatureLayer) but that shouldn't cause any issues. Whatever layer group you use you should only be adding it to the map once and then adding all child layers to the LayerGroup. You're currently adding the geojsonLayer multiple times in your "for" loop which you don't want to do.
Second, you have to call marker.openPopup() after the marker is added to the map.
Try changing your code around to looks something like this:
var layerGroup = new L.FeatureGroup();
layerGroup.addTo( m );
for (var i = 0; i < elements.length; i++) {
var address = $("<div/>").html(elements[i].address).text();
var latlng = new L.LatLng(elements[i].latitude, elements[i].longitude);
marker = new L.Marker(latlng, {icon: icon}).bindPopup(address);
//You don't add the marker directly to the map. The layerGroup has already
//been added to the map so it will take care of adding the marker to the map
layerGroup.addLayer( marker );
if (i == 0) {
marker.openPopup();
}
}
I had this issue and fixed it with adding a timeout right after I added the marker on the map.
marker.addTo(this.map).bindPopup('Info');
setTimeout(() => {
marker.openPopup();
}, 500);
I don't know why but on some page, I need to apply timeout. In any case it's my workaround, hope this works for some of you too.
First add your map then put openPopup():
L.marker([lat, long]).bindPopup('Your message').addTo(map).openPopup();

Google Map Makers Sprite in OSX not displaying

I can't seem to get the my map markers to display when I use an image sprite on the iphone. They appear when I use the standard google map markers on iphone and when viewing the site in the desktop the sprite icons work fine.
Here is the code I use to create the markers, I am using Zepto but JQuery could as easily apply.
$.ajax({
dataType: 'jsonp',
url: myLocations.LocatorUrl,
timeout: 8000,
success: function(data) {
var infoWindow = new google.maps.InfoWindow();
var bounds = new google.maps.LatLngBounds();
$.each(data, function(index, item){
var data = item, pincolor,
latLng = new google.maps.LatLng(data.lat, data.lng);
var d = 'http://blah';
var pinImage = new google.maps.MarkerImage(d+"/assets/img/sprite.locator.png",
new google.maps.Size(24, 36),
new google.maps.Point(0,25),
new google.maps.Point(10, 34));
// Creating a marker and putting it on the map
var marker = new google.maps.Marker({
position: latLng,
map: map,
title: data.type,
icon: pinImage
});
bounds.extend(latLng); // Extend the Latlng bound method
var bubbleHtml = '<div class="bubble"><h2>'+item.type+'</h2><p>'+item.address+'</p></div>'; // Custom HTML for the bubble
(function(marker, data) {
// Attaching a click event to the current marker
google.maps.event.addListener(marker, "click", function(e) {
infoWindow.setContent(bubbleHtml);
infoWindow.open(map, marker);
});
markers.push(marker); // Push markers into an array so they can be removed
})(marker, data);
});
map.fitBounds(bounds); // Center based on values added to bounds
}, error: function(x, t, m) {
console.log('errors')
if(t==="timeout") {
alert("got timeout");
} else {
alert(t);
}
}
});
Got it. Turns out the images I was referencing were on localhost, when I swapped this to the actual IP address of my local machine it worked.

infoWindow in google map not showing properly in an iPhone phonegap app

I am showing custom marker with click event on it. It shows information when I clicked but the info window is not showing well. I used some css in it. I also need to customize it further. This map is shown in phonegap app in iPhone (iOS 5). Every other thing working find (including direction, GPS).
I have used google map js v3 API.
I got this output.
How to show correct infoWindow? And customize as my need.
here is the code
function setMap(myLat, myLng){
// Define Marker properties
var image = new google.maps.MarkerImage('images/pick.png',
new google.maps.Size(30, 40),
// The origin for this image is 0,0.
new google.maps.Point(0,0),
// The anchor for this image is the base of the flagpole at 9,36.
new google.maps.Point(9, 36)
);
var my_place = new google.maps.LatLng(myLat, myLng);
var myOptions = {
zoom:14,
mapTypeId: google.maps.MapTypeId.ROADMAP,
mapTypeControl: false,
center: my_place
}
mer_map = new google.maps.Map(document.getElementById("mer_map_canvas"), myOptions);
mer_marker = new google.maps.Marker({
position: my_place,
map: mer_map,
clickable : true,
animation: google.maps.Animation.DROP,
icon: image
});
var contentString = '<div id="mer_map_info" style="border:3px solid red; color:#FFF; background-color:#000;"><p>this is just a test...</p></div>';
var infowindow = new google.maps.InfoWindow({
content: contentString
});
google.maps.event.addListener(mer_marker, 'click', function(event) {
infowindow.open(mer_map,mer_marker);
});}
Give this a try. I had a similar problem with phonegap and google maps.
#map_canvas img {
max-width: none;
}