GoogleMap
After the setup of MQTT and MQTTitude bindings to provide geo-fencing I decided some more color in the UI would be nice. The idea was to show a map that centers on my home and automatically scales to show the location of the inhabitants:
For people familiar with Google API and Ajax that is probably nothing fancy ... but for those (like me) that are new to that topic my setup might give some help and a head start.
For this example to work you'll need a proper MQTT and OwnTracks setup. Once you have the "raw" data available in OH you're ready ... ###Items...
/* Phone */
String mqttPositionPatrikRaw "Patrik Raw Data" { mqtt="<[home:owntracks/Lex/LexLuther:state:default]" }
String mqttPatrikLatitude "Patrik's Lat"
String mqttPatrikLongitude "Patrik's Lon"
String mqttPatrikAccuracy "Patrik's Accuracy"
String mqttHtcOneBattery "Patrik's HTC One Battery [%s%%]" <battery> (Phone, MQTT, Battery)
For each person you'ld like to show on the map you'll need to have latitude and longitude data available. A rule can be used to parse the data received:
import org.openhab.core.library.types.*
import org.openhab.core.persistence.*
import org.openhab.model.script.actions.*
rule "MqttPostionParsePatrik"
when
Item mqttPositionPatrikRaw changed
then
var String json = (mqttPositionPatrikRaw.state as StringType).toString
// {"_type": "location", "lat": "47.5010314", "lon": "8.3444293",
// "tst": "1422616466", "acc": "21.05", "batt": "40"}
var String type = transform("JSONPATH", "$._type", json)
if (type == "location") {
var String lat = transform("JSONPATH", "$.lat", json)
var String lon = transform("JSONPATH", "$.lon", json)
var String acc = transform("JSONPATH", "$.acc", json)
var String batt = transform("JSONPATH", "$.batt", json)
sendCommand(mqttPatrikLatitude, lat)
sendCommand(mqttPatrikLongitude, lon)
sendCommand(mqttPatikAccuracy, acc)
sendCommand(mqttHtcOneBattery, batt)
}
endThe following code will display a map based on your home location; and auto zoom to show all markers:
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
<!--
.Flexible-container {
position: relative;
padding-bottom: 56.25%;
padding-top: 30px;
height: 0;
overflow: hidden;
}
.Flexible-container iframe,
.Flexible-container object,
.Flexible-container embed {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
-->
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?v=3.exp&libraries=places,drawing,geometry"></script>
<script type="text/javascript">
////////////////////////////////////////////////////////////////////////
// Google Maps JavaScript API:
// https://developers.google.com/maps/documentation/javascript/?hl=de
// Marker Icons:
// https://sites.google.com/site/gmapsdevelopment/
////////////////////////////////////////////////////////////////////////
var map = null;
// LatLng's we want to show
var latlngHome = new google.maps.LatLng("47.501006", "8.344842");
var latlngPatrik = new google.maps.LatLng("47.501006", "8.344842"); // initialize to home ...
var latlngKarin = new google.maps.LatLng("47.501006", "8.344842"); // initialize to home ...
function startup() {
var map_canvas = document.getElementById('map_canvas');
var map_options = { center : latlngHome,
zoom : 14,
mapTypeId : google.maps.MapTypeId.ROADMAP };
map = new google.maps.Map(map_canvas, map_options);
var marker = new google.maps.Marker({
position : latlngHome,
map : map,
icon : 'http://maps.google.com/mapfiles/kml/pal2/icon10.png',
title : "Ehrendingen"
})
google.maps.event.addListener(map, 'tilesloaded', function(evt) { updateZoom(); });
} // end of function - startup
function updateZoom() {
// Array of google.maps.LatLng we want to be visible on screen ...
var latLngArray = [];
latLngArray.push(latlngHome);
latLngArray.push(latlngPatrik);
latLngArray.push(latlngKarin);
var viewPointBounds = new google.maps.LatLngBounds ();
for (var i = 0, length = latLngArray.length; i < length; i++) {
viewPointBounds.extend(latLngArray[i]);
}
map.fitBounds(viewPointBounds);
} // end of function - zoom
$(function() {
$.ajax({
url : "../rest/items/mqttPatrikLatitude/state",
data : { },
success : function( data ) {
var Latitude = data;
$.ajax({
url : "../rest/items/mqttPatrikLongitude/state",
data : { },
success : function( data ) {
var Longitude = data;
latlngPatrik = new google.maps.LatLng(Latitude, Longitude);
var marker = new google.maps.Marker({
position : latlngPatrik,
map : map,
icon : 'http://maps.google.com/mapfiles/ms/icons/green-dot.png',
title : "Patrik"
})
////////////////////////////////////////////////////////////////////////
}
})
}
}); // end of $.ajax - Patrik
$.ajax({
url : "../rest/items/mqttKarinLatitude/state",
data : { },
success : function( data ) {
var Latitude = data;
$.ajax({
url : "../rest/items/mqttKarinLongitude/state",
data : { },
success : function( data ) {
var Longitude = data;
latlngKarin = new google.maps.LatLng(Latitude, Longitude);
var marker = new google.maps.Marker({
position : latlngKarin,
map : map,
icon : 'http://maps.google.com/mapfiles/ms/icons/blue-dot.png',
title : "Karin"
})
////////////////////////////////////////////////////////////////////////
}
})
}
}); // end of $.ajax - Karin
}); // end of $(function)
</script>
</head>
<body onload="startup()">
<div id="map_canvas" class="Flexible-container" />
</body>
</html>Store that file on your OH system in "\webapps\static" (e.g. as Map.html). You can then use it in our site definitions; or directly in a browser.