I read about accurate html5 geolocation here: http://diveintohtml5.info/geolocation.html
and it gave some examples about it in JavaScript and I read a Stackoverflow question about hwere to put it in JS, but I dont know where to put it in my Dart code, I have tried a few places but it just gives me syntax errors.
So basically I want to input this :
{maximumAge:600000, timeout:5000, enableHighAccuracy: false});
To this:
if (window.navigator.geolocation != null) {
window.navigator.geolocation.getCurrentPosition().then((position) {
final pos = new LatLng(position.coords.latitude,
position.coords.longitude);
final infowindow = new InfoWindow(new InfoWindowOptions()
..position = pos
..content = 'You are here!'
);
final rectangle = new Rectangle(new RectangleOptions()
..strokeColor = '#FF0000'
..strokeOpacity = 0.8
..strokeWeight = 2
..fillColor = '#FF0000'
..fillOpacity = 0.35
..map = map
..bounds = new LatLngBounds(
new LatLng(40.316002, -76.034599),
new LatLng(40.318002, -76.032599))
);
infowindow.open(map);
map.center = pos;
}, onError : (error) {
handleNoGeolocation(true);
});
} else {
// Browser doesn't support Geolocation
handleNoGeolocation(false);
}
Any help? thanks!
You can just do it like this:
window.navigator.geolocation.getCurrentPosition(maximumAge:new Duration(seconds: 600), timeout: new Duration(seconds: 5), enableHighAccuracy: false)...
Related
I have in my Phonegap app this JQM; I create a Google map and I load markers from json file.
When i launch page2, i see the first console.log (coordinates) and the last console.log (2222222) - The intermediate console.log that contains numberOfElements is displays only the first time. If I see the map and i return back the whole script isn't loaded.
Why?
$(document).on('pageshow', '#page2', function () {
var latnow = Number(localStorage.getItem("lat"));
var lngnow = Number(localStorage.getItem("lng"));
var coordinate = new google.maps.LatLng(latnow, lngnow);
console.log(latnow + ' ' + lngnow);
$('#map_canvas').gmap({
'center': coordinate,
'disableDefaultUI': true,
'zoom': 5,
'scrollwheel': false,
'panControl': false
});
$('#map_canvas').gmap().bind('init', function () {
var images = "img/icon.png";
var images2 = "img/icon2.png";
$.getJSON('http://www.site.com/app/json.php?lat=' + latnow + '&lat=' + lngnow + '', function (data) {
var myObject = data;
var numberOfElements = data.markers.length;
console.log(numberOfElements); // <- !!!!!!
if (numberOfElements == 0) {
alert("no result");
$.mobile.changePage("#home");
}
var myObject = JSON.stringify(myObject);
localStorage.setItem("json_near", myObject);
$('#map_canvas').gmap('addMarker', {
'position': coordinate,
'icon': images2,
'bounds': true
});
//marker da json
$.each(data.markers, function (i, marker) {
$('#map_canvas').gmap('addMarker', {
'position': new google.maps.LatLng(marker.latitude, marker.longitude),
'draggable': false,
'bounds': true,
'icon': images
}).click(function () {
$('#map_canvas').gmap('openInfoWindow', {
'content': marker.content,
'maxWidt': 200,
'maxHeight': 400,
'autoScroll': true
}, this);
});
});
});
});
map_element = document.getElementById("map_canvas");
var mapwidth = $(window).width();
var mapheight = $(window).height();
$("#map_canvas").height(mapheight);
$("#map_canvas").width(mapwidth);
google.maps.event.trigger(map_element, 'resize');
console.log("2222222");
});
I assume you are using this plugin - http://code.google.com/p/jquery-ui-map/ , right?
I think it is not a problem of jquery mobile. The pageshow event is called as you can see from those console.log messages.
Try to stick console.log("xxx") into the gmap init handler. I think this is the one which is NOT called at the second time.
Something like
$('#map_canvas').gmap().bind('init', function () {
console.log("xxxxxx");
var images = "img/icon.png";
var images2 = "img/icon2.png";
...
...
});
do you see xxxxxxx in the console every time you get in the page?
If not, try to find the way how to check whether the map was already initialized (second, third, fourth time, etc.) and then, call getJSON directly.
I have been reading and researching how to animate overlays. I Haven't found anything related to what I am looking for. Mostly it was related to markers. I have an overlay I apply like this and it works great.
tileNEX = new google.maps.ImageMapType({
getTileUrl: function(tile, zoom) {
return "http://mesonet.agron.iastate.edu/cache/tile.py/1.0.0/nexrad-n0q-900913/" + zoom + "/" + tile.x + "/" + tile.y +".png?"+ (new Date()).getTime();
},
tileSize: new google.maps.Size(256, 256),
opacity: 0.60,
name: 'NEXRAD',
isPng: true
});
The source for the data also offers 10 other past images. So I would like to create an animated loop with those feeds. Is this option available in V3 as I have read some conflicts with doing this. I mean it must be possible because I have seen others with it. How would I go about loading the multiple layers then animating them?
-Thanks!
I know this is old but I hope this helps someone else looking for the same thing. This probably isn't the most elegant solution but it got the task done. I simply map over the predefined image urls creating my ImageMapTypes and then pass that into an animation loop which checks to see if there is a layer on the map, clears if it there is and then sets the new layer based on a loop count. Hope this helps.
var map;
// Weather tile url from Iowa Environmental Mesonet (IEM): http://mesonet.agron.iastate.edu/ogc/
var urlTemplate = 'http://mesonet.agron.iastate.edu/cache/tile.py/1.0.0/nexrad-n0q-{timestamp}/{zoom}/{x}/{y}.png';
// The time stamps values for the IEM service for the last 50 minutes broken up into 5 minute increments.
var timestamps = ['900913-m50m', '900913-m45m', '900913-m40m', '900913-m35m', '900913-m30m', '900913-m25m', '900913-m20m', '900913-m15m', '900913-m10m', '900913-m05m', '900913'];
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 38.0781, lng: -97.7030},
zoom: 5
});
let tileSources = timestamps.map((timestamp) => {
return new google.maps.ImageMapType({
getTileUrl: function(tile, zoom) {
const { x, y} = tile;
return `https://mesonet.agron.iastate.edu/cache/tile.py/1.0.0/nexrad-n0q-${timestamp}/${zoom}/${x}/${y}.png?`+ (new Date()).getTime();
},
tileSize: new google.maps.Size(256, 256),
opacity:0.60,
name : 'NEXRAD',
isPng: true
});
});
startAnimation(map, tileSources);
}
function startAnimation(map, layers) {
// create empty overlay entry
map.overlayMapTypes.push(null);
var count = 0;
window.setInterval(() => {
if(map.overlayMapTypes.getLength() > 0)
map.overlayMapTypes.clear();
map.overlayMapTypes.setAt("0",layers[count]);
count = (count + 1) % layers.length;
},800);
}
I am using phonegap, jquerymobile the googlemap API to get my current position and to watch my position.
For this, when I lunch my map page, my position is shown with a marker and the marker move when I move.
Even if it works excpeted when I close my App (onPause).
Here is my code (you can tell me how I can perfect it :o) )
$('#home').live("pagebeforeshow", function() {
if($('#googleAPI').length != 0){
navigator.geolocation.getCurrentPosition(function(position){
//showMap('mapHome',position.coords.latitude, position.coords.longitude);// Canvas, lat, long
var latLng = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
// Google Map options
var myOptions = {
zoom: 17,
//zoomControl : 1,
center: latLng,
mapTypeId: google.maps.MapTypeId.ROADMAP////ROADMAP, SATELLITE, HYBRID and TERRAIN
};
// Create the Google Map, set options
Tracking.mapy = new google.maps.Map(document.getElementById('mapHome'), myOptions);
//addMarker(position.coords.latitude,position.coords.longitude);
},
showError,
{
enableHighAccuracy : true,
maximumAge : 2000
//maximumAge:Infinity
});
}
})
$('#home').live("pageshow", function() {
// Place and move the marker regarding to my position and deplacement
if($('#googleAPI').length != 0){
//var track_id = "me";
Tracking.watch_id = navigator.geolocation.watchPosition(
// Success
function(position){
var lat = position.coords.latitude;
var long = position.coords.longitude;
var latLng = new Array();
latLng[0] = lat;
latLng[1] = long;
//Tracking.myCoordinates.push(lat,long);
Tracking.myCoordinates.push(latLng);
addMarker(lat, long);
},
// Error
showError,
{
frequency: 1000
});
console.log('HW : WatchPosition called. Id:' + Tracking.watch_id);
}else{
Alert.show('The map API has not been loaded. Check for connection and try again. (pagebeforeshow)');
}
})
$('#home').live("pagebeforehide", function() {
if($('#googleAPI').length != 0){
//track_id = "me";
// Stop tracking the user
if (Tracking.watch_id != null) {
navigator.geolocation.clearWatch(Tracking.watch_id);
console.log('HW : WatchPosition cancelled Id:' + Tracking.watch_id);
Tracking.watch_id = null;
}
//navigator.geolocation.clearWatch(Tracking.watch_id);
//Tracking.watch_id = null;
Tracking.myCoordinates = new Array();
}else{
Alert.show('The map API has not been loaded. Check for connection and try again. (pagebeforeshide)');
}
});
The problem is when I close my App, because I still need to be alert when I go outside of my geofence. Then, as lomg as I do not stop to watch my position, I need it to be watching even if I close my position or if I lunch another app.
Then I do not know how to do when I called that Phonegap even:
document.addEventListener('pause', onPause, false);
function onPause(){}
Should I simply relunch my watch code with a different watch_id?
Any suggestion?
Many thank and happy new year
I think what you're trying to get at is running a background process using phonegap. The discussion in this link seems to say that it's only possible if you write a plugin to perform that functionality. PhoneGap doesn't have an API to do it out of the box.
Executing javascript in background using phonegap
Is it possible to zoom in on cluster on click? I also don't know how to disable cluster popup. I read this question , but still have no idea how to do it.
Here is the code:
<html>
<script src="../ol/OpenLayers.js"></script>
<script>
var map, select;
var lat = 53.507;
var lon = 28.145;
var zoom = 7;
function init() {
map = new OpenLayers.Map("map",
{ maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
numZoomLevels: 19,
maxResolution: 156543.0399,
units: 'm',
projection: new OpenLayers.Projection("EPSG:900913"),
displayProjection: new OpenLayers.Projection("EPSG:4326"),
controls: [
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.PanZoomBar(),
new OpenLayers.Control.ScaleLine(),
new OpenLayers.Control.Permalink('permalink'),
new OpenLayers.Control.Attribution(),
new OpenLayers.Control.MousePosition()
] });
var osm = new OpenLayers.Layer.OSM("OpenStreetMap");
map.addLayer(osm);
var lonLat = new OpenLayers.LonLat(lon, lat).transform(map.displayProjection, map.projection);
if (!map.getCenter()) map.setCenter (lonLat, zoom);
var MyStyle = new OpenLayers.Style({
// 'cursor' : 'pointer',
fillColor : "#336699",
fillOpacity : 0.9,
fontColor: "#000080",
fontFamily: "sans-serif, Arial",
// fontWeight: "bold",
externalGraphic: "atm.png",
graphicWidth: 32,
graphicHeight: 37,
label: "${count}",
labelAlign: "ct",
fontSize: "15px",
});
var layer = new OpenLayers.Layer.Vector("Atm", {
protocol: new OpenLayers.Protocol.HTTP({
url: "atm.txt",
format: new OpenLayers.Format.Text({extractStyles: true}),
params: {
extractAttributes: false,
}
}),
styleMap: MyStyle, <!-- --------------------- style -->
projection: map.displayProjection,
strategies: [
new OpenLayers.Strategy.BBOX({ratio: 1, resFactor: 1.1}),
new OpenLayers.Strategy.Cluster({distance: 50, threshold: 3})
]
});
map.addLayer(layer);
// Interaction; not needed for initial display.
selectControl = new OpenLayers.Control.SelectFeature(layer);
map.addControl(selectControl);
selectControl.activate();
layer.events.on({
'featureselected': onFeatureSelect,
'featureunselected': onFeatureUnselect
});
}
// Needed only for interaction, not for the display.
function onPopupClose(evt) {
// 'this' is the popup.
var feature = this.feature;
if (feature.layer) { // The feature is not destroyed
selectControl.unselect(feature);
} else { // After "moveend" or "refresh" events on POIs layer all
// features have been destroyed by the Strategy.BBOX
this.destroy();
}
}
function onFeatureSelect(evt) {
feature = evt.feature;
popup = new OpenLayers.Popup.FramedCloud("featurePopup",
feature.geometry.getBounds().getCenterLonLat(),
new OpenLayers.Size(100,100),
"<h2>"+feature.attributes.title + "</h2>" +
feature.attributes.description,
null, true, onPopupClose);
feature.popup = popup;
popup.feature = feature;
map.addPopup(popup, true);
}
function onFeatureUnselect(evt) {
feature = evt.feature;
if (feature.popup) {
popup.feature = null;
map.removePopup(feature.popup);
feature.popup.destroy();
feature.popup = null;
}
}
</script>
</head>
<body onload="init()">
<div id="map"></div>
</body>
</html>
Thanks. Your post does not have much context to explain the code sections; please explain your scenario more clearly.
function onFeatureSelect(event) {
if(!event.feature.cluster) // if not cluster
{
// handle your popup code for the individual feature
}
else
{
// fetch the cluster's latlon and set the map center to it and call zoomin function
// which takes you to a one level zoom in and I hope this solves your purpose :)
map.setCenter(event.feature.geometry.getBounds().getCenterLonLat());
map.zoomIn();
}
}
Using the example code in the linked question I would iterate over all features in the cluster to create a BBX, and then zoom into that extent.
var cluster_bounds=new OpenLayers.Bounds();
event.feature.cluster.forEach(function(feature){
clouster_bounds.extend(feature.geometry);
})
map.zoomToExtent(cluster_bounds)
If you really don't know how to disable the popups then remove these functions:
function onFeatureSelect(evt) {
function onFeatureUnselect(evt) {
And replace it with:
function onFeatureSelect(event) {
var cluster_bounds=new OpenLayers.Bounds();
event.feature.cluster.forEach(function(feature){
cluster_bounds.extend(feature.geometry);
});
map.zoomToExtent(cluster_bounds);
}
So this gets auto generated through the controller and I think I'm just overlooking something but the output is just like this
google.load("maps", "2.x", {"language" : "en"});
function initialize() {
if (GBrowserIsCompatible()) {
// Initialize the GMap
var map = new google.maps.Map2(document.getElementById("map"));
map.addControl(new google.maps.SmallMapControl());
map.setCenter(new google.maps.LatLng(30.226632, -97.935056), 10, G_NORMAL_MAP);
// Build custom marker icons
var tinyIcon = new google.maps.Icon();
tinyIcon.image = "http://labs.google.com/ridefinder/images/mm_20_red.png";
tinyIcon.shadow = "http://labs.google.com/ridefinder/images/mm_20_shadow.png";
tinyIcon.iconSize = new google.maps.Size(12,20);
tinyIcon.shadowSize = new google.maps.Size(22,20);
tinyIcon.iconAnchor = new google.maps.Point(6,20);
tinyIcon.infoWindowAnchor = new google.maps.Point(5,1);
// Show map points
var m1 = new google.maps.Marker(new google.maps.LatLng(35.2602340, -93.7939480), {icon:tinyIcon,bouncy:1});
google.maps.Event.addListener(m1, "click", function()
{
m1.openInfoWindowHtml(
'1<br />test,TX'
);
});
map.addOverlay(m1);
var m2 = new google.maps.Marker(new google.maps.LatLng(35.2810510, -93.8246510), {icon:tinyIcon,bouncy:1});
google.maps.Event.addListener(m2, "click", function()
{
m2.openInfoWindowHtml(
'test<br />test,Texas'
);
});
map.addOverlay(m2);
}
google.setOnLoadCallback(initialize);
So when i go to use a trigger event
google.maps.event.trigger(markers[m3], 'click');
Nothing happens, and I cant figure out the correct trigger to make it do so...
Based on the code sample you posted there is no markers[m3] defined, wouldn't you need to use google.maps.event.trigger(m2, 'click'); ? (m3 isn't defined at all in that code sample)