added code for feature to show KML layer on google maps

Author: bhuveshsharma09

flask_googlemaps/__init__.py

@@ -48,6 +48,7 @@ def __init__(
         report_clickpos=False,
         clickpos_uri="",
         styles="",
+        layer="",
         **kwargs
     ):
         """Builds the Map properties"""
@@ -89,6 +90,7 @@ def __init__(
 
         self.fit_markers_to_bounds = fit_markers_to_bounds
         self.styles = styles
+        self.layer = layer
 
 
     def build_markers(self, markers):

flask_googlemaps/templates/googlemaps/gmapjs.html

@@ -13,6 +13,10 @@
 {%  endif %}
 
 
+<script src="https://unpkg.com/deck.gl@^7.0.0/dist.min.js"></script>
+
+<script src="https://maps.googleapis.com/maps-api-v3/api/js/42/6/kml.js"></script>
+
 <style type="text/css">
       #{{gmap.identifier}} { {{gmap.style}} }
 </style>
@@ -53,6 +57,12 @@
             }
         {% endif %}
 
+        // add kml layer on map
+        const ctaLayer = new google.maps.KmlLayer({
+        url: "{{gmap.layer }}",
+        map: {{gmap.varname}},
+         });
+
         // add gmap markers
         var raw_markers = {{gmap.markers|tojson|safe}};
         for(i=0; i<{{gmap.markers|length}};i++) {