Google Maps toggle markers

• futaba

• January 29, 2019 at 11:49 pm

I am showing multiple markers on frontend using ACF with custom post type (location). There are two types of location and I need to show or hide each location type with button/checkbox.

I tried doing with jQuery but as the map is not part of the DOM, it did not work.

My marker code is like the following

<div class="marker <?php echo $type; ?>" data-lat="<?php echo $location['lat']; ?>" data-lng="<?php echo $location['lng']; ?>" data-img="<?php echo $type_icon; ?>">
    <div class="inside-marker">
	    <h5 style="text-decoration:none"><?php echo $title; ?></h5>
	    <?php
	        if($client_type) {
	         echo 'Client Type: '.$client_type.'<br>';   
	        }
	        if($project_end_date) {
	         echo 'Project Ended: '.$project_end_date;       
	        }
	    ?>
	</div>
</div>

• futaba

• June 27, 2020 at 12:52 am

I found the solution in this article

https://itsmereal.com/advanced-custom-fields-google-map-markers-with-filters/

Google Maps JS file

(function($) {

/*
*  new_map
*
*  This function will render a Google Map onto the selected jQuery element
*
*  @type	function
*  @date	8/11/2013
*  @since	4.3.0
*
*  @param	$el (jQuery element)
*  @return	n/a
*/

function new_map( $el ) {
	
	// var
	var $markers = $el.find('.marker');
	
	
	// vars
	var args = {
		zoom		: 16,
		center		: new google.maps.LatLng(0, 0),
		mapTypeId	: google.maps.MapTypeId.ROADMAP
	};
	
	
	// create map	        	
	var map = new google.maps.Map( $el[0], args);
	
	
	// add a markers reference
	map.markers = [];
	
	
	// add markers
	$markers.each(function(){
		
    	add_marker( $(this), map );
		
	});
	
	
	// center map
	center_map( map );
	
	
	// return
	return map;
	
}

/*
*  add_marker
*
*  This function will add a marker to the selected Google Map
*
*  @type	function
*  @date	8/11/2013
*  @since	4.3.0
*
*  @param	$marker (jQuery element)
*  @param	map (Google Map object)
*  @return	n/a
*/

function add_marker( $marker, map ) { 
	// var
	var latlng = new google.maps.LatLng( $marker.attr('data-lat'), $marker.attr('data-lng') );
    var icon = $marker.attr('data-img');
    var type = $marker.attr('data-type');
    
	// create marker
	var marker = new google.maps.Marker({
		position	: latlng,
		map			: map,
		icon        : icon,
		type        : type
	});

	// add to array
	map.markers.push( marker );
	
	// if marker contains HTML, add it to an infoWindow
	if( $marker.html() )
	{
		// create info window
		var infowindow = new google.maps.InfoWindow({
			content		: $marker.html()
		});

		// show info window when marker is clicked
		google.maps.event.addListener(marker, 'click', function() {          

			infowindow.open( map, marker );

		});
	}

}

/*
*  Marker Filter - NEW!
*/

filterMarker = function (id) {
    for (i = 0; i < map.markers.length; i++) {
        marker = map.markers[i];
        
        if (document.getElementById(id).checked) {
            if (marker.type == id) {
                marker.setVisible(true);
            } 
        }  else {
            if (marker.type == id) {
                marker.setVisible(false);
            }
        }
        
    }    
}

/*
*  center_map
*
*  This function will center the map, showing all markers attached to this map
*
*  @type	function
*  @date	8/11/2013
*  @since	4.3.0
*
*  @param	map (Google Map object)
*  @return	n/a
*/

function center_map( map ) {

	// vars
	var bounds = new google.maps.LatLngBounds();

	// loop through all markers and create bounds
	$.each( map.markers, function( i, marker ){

		var latlng = new google.maps.LatLng( marker.position.lat(), marker.position.lng() );

		bounds.extend( latlng );

	});

	// only 1 marker?
	if( map.markers.length == 1 )
	{
		// set center of map
	    map.setCenter( bounds.getCenter() );
	    map.setZoom( 16 );
	}
	else
	{
		// fit to bounds
		map.fitBounds( bounds );
	}

}

/*
*  document ready
*
*  This function will render each map when the document is ready (page has loaded)
*
*  @type	function
*  @date	8/11/2013
*  @since	5.0.0
*
*  @param	n/a
*  @return	n/a
*/
// global var
var map = null;

$(document).ready(function(){

	$('.acf-map').each(function(){

		// create map
		map = new_map( $(this) );

	});
 
		    //zoom
			google.maps.event.addListener( map, 'zoom_changed', function( e ) {
	        
        	var zoom = map.getZoom();   
			
             if(zoom!= 5)           
             {
			var bounds = map.getBounds();
			
               myLatLngss = [];
              	$.each( map.markers, function( i, marker ){			
			var myLatLng = new google.maps.LatLng(marker.position.lat(), marker.position.lng() );	
						
			if(bounds.contains(myLatLng)===true) {						
             		 myLatLngss.push( myLatLng );
					}
					else {
						   
					}
			});
               if(myLatLngss.length > 0)
               { 
                 document.cookie = "coordn="+myLatLngss;
                 $("#customzm").load(location.href + " #customzm");                 
               } 
            } 
			       
	       });
   google.maps.event.addListener(map, 'dragend', function() {
   //alert('map dragged');
   var bounds = map.getBounds();
			
                  myLatLngss = [];
              	$.each( map.markers, function( i, marker ){

			var myLatLng = new google.maps.LatLng(marker.position.lat(), marker.position.lng() );	
					
			if(bounds.contains(myLatLng)===true) {						
             		 myLatLngss.push( myLatLng );
					}
					else {
   
					}
           if(myLatLngss.length > 0)
               {
                 document.cookie = "coordn="+myLatLngss;
                 $("#customzm").load(location.href + " #customzm");                 
               }
			});
   
 } );
  			

});

})(jQuery);