javascript - 实现 Google map Spiderfier

Question

我正在尝试实现 https://github.com/jawj/OverlappingMarkerSpiderfier处理可能出现在完全相同位置的多个 map 标记。我使用下面的 javascript 从 .marker 类的 div 中获取 map 数据并创建 map 。它正在运行并且效果很好。

function initialize() {

function render_map( $el ) {

    // var
    var $markers = $el.find('.marker');

    // vars
    var args = {
        zoom        : 8,
        center      : new google.maps.LatLng(42.7086815, -84.559032),
        scrollwheel : false,
        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 );

    });
    var padder = document.createElement('div');
    padder.style.height = '100px';
    padder.style.width = '100%';
    map.controls[google.maps.ControlPosition.TOP_CENTER].push(padder);
    // center map
    center_map( map );

}

function add_marker( $marker, map ) {

    // var
    var latlng = new google.maps.LatLng( $marker.attr('data-lat'), $marker.attr('data-lng') );

    // create marker

    var marker = new google.maps.Marker({
        position    : latlng,
        map         : map

    });

    // 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 );
            map.setCenter(marker.getPosition());

        });
    }

}    

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() );

    }
    else if( map.markers.length == 0 )
    {
        // set center of map
        map.setCenter( 42.7086815, -84.559032 );


    }
    else
    {
        // fit to bounds
        map.fitBounds( bounds );

    }
    google.maps.event.addListenerOnce(map, 'bounds_changed', function(event) {
      if (this.getZoom() > 8) {
        this.setZoom(8);
      }
});
}

$(document).ready(function(){

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

        render_map( $(this) );

    });

});

}

但是，当我尝试将我所拥有的内容与 Spiderfier js 集成时， map 标记没有显示。这是我合并 js 的遗憾尝试。知道如何使用 Spiderfier 但仍然从 .marker div 中获取内容吗？

function initialize() {

function render_map( $el ) {

    // var
    var $markers = $el.find('.marker');

    // vars
    var args = {
        zoom        : 8,
        center      : new google.maps.LatLng(42.7086815, -84.559032),
        scrollwheel : false,
        mapTypeId   : google.maps.MapTypeId.ROADMAP
    };

    // create map               
    var map = new google.maps.Map( $el[0], args);
    var oms = new OverlappingMarkerSpiderfier(map);
    var iw = new google.maps.InfoWindow();
        oms.addListener('click', function(marker, event) {
          iw.setContent(marker.desc);
          iw.open(map, marker);
        });
    oms.addListener('spiderfy', function(markers) {
      iw.close();
    });

    // var
    var latlng = new google.maps.LatLng( $marker.attr('data-lat'), $marker.attr('data-lng') );

    // create marker

    var marker = new google.maps.Marker({
        position    : latlng,
        map         : map

    });
    marker.desc = $marker.html();
    oms.addMarker(marker);


    var padder = document.createElement('div');
    padder.style.height = '100px';
    padder.style.width = '100%';
    map.controls[google.maps.ControlPosition.TOP_CENTER].push(padder);
    // center map
    center_map( map );

}


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() );

    }
    else if( map.markers.length == 0 )
    {
        // set center of map
        map.setCenter( 42.7086815, -84.559032 );


    }
    else
    {
        // fit to bounds
        map.fitBounds( bounds );

    }
    google.maps.event.addListenerOnce(map, 'bounds_changed', function(event) {
      if (this.getZoom() > 8) {
        this.setZoom(8);
      }
});
}


$(document).ready(function(){

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

        render_map( $(this) );

    });

});

}

Answer 1

下面是正确集成的 JavaScript，以防对其他人有帮助。

function initialize() {

/*
*  render_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 render_map( $el ) {

    // var
    var $markers = $el.find('.marker');

    // vars
    var args = {
        zoom        : 8,
        center      : new google.maps.LatLng(42.7086815, -84.559032),
        scrollwheel : false,
        mapTypeId   : google.maps.MapTypeId.ROADMAP
    };

    // create map               
    var map = new google.maps.Map( $el[0], args);
    var oms = new OverlappingMarkerSpiderfier(map);
    var iw = new google.maps.InfoWindow();
    oms.addListener('click', function(marker, event) {
        iw.setContent(marker.desc);
        iw.open(map, marker);
    });
    oms.addListener('spiderfy', function(markers) {
        iw.close();
    });

    $markers.each(function(index, item) {
        // create latlng
        var latlng = new google.maps.LatLng( $(item).attr('data-lat'), $(item).attr('data-lng') );
        // create marker
        var iconBase = '/images/';
        var marker = new google.maps.Marker({
            position    : latlng,
            map         : map,
            icon: iconBase + 'marker.png'
        });
        marker.desc = $(item).html();
        oms.addMarker(marker);
    });

    var padder = document.createElement('div');
    padder.style.height = '100px';
    padder.style.width = '100%';
    map.controls[google.maps.ControlPosition.TOP_CENTER].push(padder);

    // center map
    center_map(map);
}



/*
*  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() );

    }
    else if( map.markers.length == 0 )
    {
        // set center of map
        map.setCenter( 42.7086815, -84.559032 );


    }
    else
    {
        // fit to bounds
        map.fitBounds( bounds );

    }
    google.maps.event.addListenerOnce(map, 'bounds_changed', function(event) {
      if (this.getZoom() > 8) {
        this.setZoom(8);
      }
    });


}

/*
*  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
*/

$(document).ready(function(){

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

        render_map( $(this) );

    });

});

}