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I'd like to display a Google Map inside a polymer element.
This map should be handled from outside of my component.
289
Here's how to declare a simple custom element that contains a google map. In this example the map has to be handled manually outside of the component :
<polymer-element name="gmap-map">
<template>
<div id='mapView' style='height: 500px; width: 500px'></div>
</template>
<script type="application/dart" src="gmap.dart"></script>
</polymer-element>
import 'package:google_maps/google_maps.dart';
import 'package:polymer/polymer.dart';
@CustomTag('gmap-map')
class MapElement extends PolymerElement {
GMap map;
MapElement.created() : super.created() {
final mapOptions = new MapOptions()
..mapTypeId = MapTypeId.ROADMAP;
final mapView = getShadowRoot('gmap-map').querySelector("#mapView");
map = new GMap(mapView, mapOptions);
}
attached() {
super.attached();
// this allow to notify the map that the size of the canvas has changed.
// in some cases, the map behaves like it has a 0*0 size.
event.trigger(map, 'resize', []);
}
}
Now you can use it in an html file like that (you access the map instance with the map getter on element) :
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>GMaps app</title>
<script src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<link rel="import" href="gmap.html">
<script type="application/dart">
import 'dart:html';
import 'gmap.dart' as m;
import 'package:google_maps/google_maps.dart';
import 'package:polymer/polymer.dart';
main(){
initPolymer();
m.MapElement mapElement = querySelector('#myMap');
mapElement.map
..panTo(new LatLng(48, 2.5))
..zoom = 5;
}
</script>
<script src="packages/browser/dart.js"></script>
<script src="packages/browser/interop.js"></script>
</head>
<body>
<h1>Gmaps</h1>
<gmap-map id='myMap'></gmap-map>
</body>
</html>
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