1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
<%args>
@features
</%args>
<%doc>
Generic Google Maps front end.
<& /elements/gmap.html,
features => [
{ id => 'svc_acct/12',
geometry => {
type => 'Point',
coordinates => [ -86, 40 ], # optionally altitude as the third coord
},
properties => {
# see https://developers.google.com/maps/documentation/javascript/3.exp/reference#Data.StyleOptions
style => {
icon => {
scale => 4,
fillColor => 'orange',
}
},
# content of popup info box (might AJAX this later)
content => '<a href="view/svc_acct.cgi?12">username@example.com</a>',
}
}, # end of feature
],
&>
</%doc>
<%init>
foreach (@features) {
$_->{type} = 'Feature';
# any other per-feature massaging can go here
}
my $tree = {
type => 'FeatureCollection',
features => \@features
};
</%init>
<div id="map_canvas"></div>
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0px; padding: 0px }
#map_canvas { height: 100%; }
</style>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?v=3">
</script>
<script type="text/javascript">
var data_geojson = <% encode_json($tree) %>;
var baseStyle = {
clickable: true,
icon: {
path: google.maps.SymbolPath.CIRCLE,
scale: 4,
fillColor: 'green',
fillOpacity: 1,
strokeColor: 'black',
strokeWeight: 1,
},
};
var featureStyle = function(feature) {
// jQuery.extend(): merge properties of objects
// 'true' makes it a deep copy; start the merge with {} so that
// baseStyle doesn't get overwritten
return $.extend(true, {}, baseStyle, feature.getProperty('style'));
};
var map;
function initMap() {
var canvas = $('#map_canvas');
map = new google.maps.Map(canvas[0], { zoom: 6 });
try {
map.data.addGeoJson(data_geojson);
} catch(ex) {
console.log(ex.toString);
debugger;
}
// construct bounds around all of the features
var bounds = new google.maps.LatLngBounds;
map.data.forEach(function(feature) {
var g = feature.getGeometry();
if (g.getType() == 'Point') {
bounds.extend(g.get());
} else if (g.getArray) {
g.getArray().forEach(function(point) { bounds.extend(point); });
}
});
map.fitBounds(bounds);
map.data.setStyle(featureStyle);
var info = new google.maps.InfoWindow;
map.data.addListener('click', function(ev) {
var feature = ev.feature;
if ( feature.getGeometry().getType() == 'Point' ) {
// then pop up an info box with the feature content
info.close();
info.setPosition(feature.getGeometry().get());
info.setContent(feature.getProperty('content'));
info.open(map);
}
// snap to feature ROI if it has one
if ( feature.getProperty('bounds') ) {
map.fitBounds( feature.getProperty('bounds') );
}
}); // addListener()
}
$().ready( initMap );
</script>
|
