i have a working code that shows multiple markers on google map using geocoder such as
@nearbys = Place.near("#{params[:address]}", 5,:order => "distance",:units => :km)
@nearbys.first(5)
and i display the markers using the below code
function initialize() {
var map;
var bounds = new google.maps.LatLngBounds();
var mapOptions = {
mapTypeId: 'roadmap'
};
// Display a map on the page
map = new google.maps.Map(document.getElementById("map-canvas-guest"), mapOptions);
map.setTilt(45);
// adding Multiple Markers from ruby object
var markers = [
['<%= @nearbys[0].title %>', '<%= @nearbys[0].latitude %>','<%= @nearbys[0].longitude %>'],
['<%= @nearbys[1].title %>', '<%= @nearbys[1].latitude %>','<%= @nearbys[1].longitude %>'],
['<%= @nearbys[2].title %>', '<%= @nearbys[2].latitude %>','<%= @nearbys[2].longitude %>'],
['<%= @nearbys[3].title %>', '<%= @nearbys[3].latitude %>','<%= @nearbys[3].longitude %>']
,
['<%= @nearbys[4].title %>', '<%= @nearbys[4].latitude %>','<%= @nearbys[4].longitude %>']
];
// adding Info Window Content
var infoWindowContent = [
['<div class="info_content" >' +
'<h3><%= @nearbys[0].title %></h3>' +'</br>'+
'<p><%= @nearbys[0].about %></p>' +
'</div>'],
['<div class="info_content">' +
'<h3><%= @nearbys[1].title %></h3>' +
'<p><%= @nearbys[1].about %></p>' +
'</div>'],
['<div class="info_content">' +
'<h3><%= @nearbys[2].title %></h3>' +'</br>'+
'<p><%= @nearbys[2].about %></p>' +
'</div>'],
['<div class="info_content">' +
'<h3><%= @nearbys[3].title %></h3>' +'</br>'+
'<p><%= @nearbys[2].about %>/p>' +
'</div>'],
['<div class="info_content">' +
'<h3><%= @nearbys[4].title %></h3>' +'</br>'+
'<p><%= @nearbys[4].about %></p>' +
'</div>']
];
// Display multiple markers on a map
var infoWindow = new google.maps.InfoWindow(), marker, i;
// Loop through our array of markers & place each one on the map
for( i = 0; i < markers.length; i++ ) {
var position = new google.maps.LatLng(markers[i][1], markers[i][2]);
bounds.extend(position);
marker = new google.maps.Marker({
position: position,
map: map,
title: markers[i][0]
});
// Allow each marker to have an info window
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infoWindow.setContent(infoWindowContent[i][0]);
infoWindow.open(map, marker);
}
})(marker, i));
// Automatically center the map fitting all markers on the screen
map.fitBounds(bounds);
}
// Override our map zoom level once our fitBounds function runs (Make sure it only runs once)
var boundsListener = google.maps.event.addListener((map), 'bounds_changed', function(event) {
this.setZoom(14);
google.maps.event.removeListener(boundsListener);
});
}//initialize ends
BUT the problem is:-what if @nearbys has less than 5 count,then this code fails.SO i have been trying to make it dynamic using jquery arrays but its not working because i think my code is missing something to work it dynamically. it should be something like this..
var array=<%= @nearbys%>;
var markers=[];
var infowindows=[];
array.each(function(index){
markers.push('<%= @nearbys[0].title %>', '<%= @nearbys[0].latitude %>','<%= @nearbys[0].longitude %>');
infowindows.push('<div class="info_content" >'+'<h3><%= @nearbys[0].title %></h3>' +'</br>'+
'<p><%= @nearbys[0].about %></p>'+'</div>');
})
..SO how i can achieve this........to make this dynamic so that above working code doesnt breaks with the newly added code.
well after struggling with jquery arrays and json ,i was able to find this best solution...this is working in all scenarios and all i need is to handle empty and null conditions,which i already did and its working the way i needed.HOPE THIS HELPS SOMEONE
my controller
def show_nearby_locations
@nearbys = Place.near("#{params[:address]}", 5,:order => "distance",:units => :km)
@nearbys.first(10)
end
in my view file
<%= javascript_tag do%>
window.nearbys= <%=raw @nearbys.to_json %>;
<%end%>
this is my script inside view
function initialize() {
var map;
var bounds = new google.maps.LatLngBounds();
var mapOptions = {
mapTypeId: 'roadmap'
};
// Display a map on the page
map = new google.maps.Map(document.getElementById("map-canvas-guest"), mapOptions);
map.setTilt(45);
var markers=[];
var infoWindowContent=[];
$.each(nearbys, function(index) {
console.log( data[0][index].latitude,data[0][index].longitude );
markers.push([nearbys[index]['title'], nearbys[index]['latitude'],nearbys[index]['longitude']]);
infoWindowContent.push(['<div class="info_content" >' +
'<h3 style="color: rgb(<%= rand(0..200)%>,<%= rand(0..200)%> ,<%= rand(0..200)%>);">'+nearbys[index]['title']+'</h3>' +'</br>'+
'<p>'+nearbys[index]['about']+'</p>' +
'</div>']);
});
// Display multiple markers on a map
var infoWindow = new google.maps.InfoWindow(), marker, i;
// Loop through our array of markers & place each one on the map
for( i = 0; i < markers.length; i++ ) {
var position = new google.maps.LatLng(markers[i][1], markers[i][2]);
bounds.extend(position);
marker = new google.maps.Marker({
position: position,
map: map,
title: markers[i][0]
});
// Allow each marker to have an info window
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infoWindow.setContent(infoWindowContent[i][0]);
infoWindow.open(map, marker);
}
})(marker, i));
// Automatically center the map fitting all markers on the screen
map.fitBounds(bounds);
}
// Override our map zoom level once our fitBounds function runs (Make sure it only runs once)
var boundsListener = google.maps.event.addListener((map), 'bounds_changed', function(event) {
this.setZoom(14);
google.maps.event.removeListener(boundsListener);
});
}//initialize ends