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examples/speed_test.js 4.03 KB
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dbaadcdd8   Tom Huang   Signed-off-by: To... 
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  /**
   * @fileoverview This demo is used for MarkerClusterer. It will show 100 markers
   * using MarkerClusterer and count the time to show the difference between using
   * MarkerClusterer and without MarkerClusterer.
   * @author Luke Mahe (v2 author: Xiaoxi Wu)
   */
  
  function $(element) {
    return document.getElementById(element);
  }
  
  var speedTest = {};
  
  speedTest.pics = null;
  speedTest.map = null;
  speedTest.markerClusterer = null;
  speedTest.markers = [];
  speedTest.infoWindow = null;
  
  speedTest.init = function() {
    var latlng = new google.maps.LatLng(39.91, 116.38);
    var options = {
      'zoom': 2,
      'center': latlng,
      'mapTypeId': google.maps.MapTypeId.ROADMAP
    };
  
    speedTest.map = new google.maps.Map($('map'), options);
    speedTest.pics = data.photos;
    
    var useGmm = document.getElementById('usegmm');
    google.maps.event.addDomListener(useGmm, 'click', speedTest.change);
    
    var numMarkers = document.getElementById('nummarkers');
    google.maps.event.addDomListener(numMarkers, 'change', speedTest.change);
  
    speedTest.infoWindow = new google.maps.InfoWindow();
  
    speedTest.showMarkers();
  };
  
  speedTest.showMarkers = function() {
    speedTest.markers = [];
  
    var type = 1;
    if ($('usegmm').checked) {
      type = 0;
    }
  
    if (speedTest.markerClusterer) {
      speedTest.markerClusterer.clearMarkers();
    }
  
    var panel = $('markerlist');
    panel.innerHTML = '';
    var numMarkers = $('nummarkers').value;
  
    for (var i = 0; i < numMarkers; i++) {
      var titleText = speedTest.pics[i].photo_title;
      if (titleText === '') {
        titleText = 'No title';
      }
  
      var item = document.createElement('DIV');
      var title = document.createElement('A');
      title.href = '#';
      title.className = 'title';
      title.innerHTML = titleText;
  
      item.appendChild(title);
      panel.appendChild(item);
  
  
      var latLng = new google.maps.LatLng(speedTest.pics[i].latitude,
          speedTest.pics[i].longitude);
  
      var imageUrl = 'http://chart.apis.google.com/chart?cht=mm&chs=24x32&chco=' +
          'FFFFFF,008CFF,000000&ext=.png';
      var markerImage = new google.maps.MarkerImage(imageUrl,
          new google.maps.Size(24, 32));
  
      var marker = new google.maps.Marker({
        'position': latLng,
        'icon': markerImage
      });
  
      var fn = speedTest.markerClickFunction(speedTest.pics[i], latLng);
      google.maps.event.addListener(marker, 'click', fn);
      google.maps.event.addDomListener(title, 'click', fn);
      speedTest.markers.push(marker);
    }
  
    window.setTimeout(speedTest.time, 0);
  };
  
  speedTest.markerClickFunction = function(pic, latlng) {
    return function(e) {
      e.cancelBubble = true;
      e.returnValue = false;
      if (e.stopPropagation) {
        e.stopPropagation();
        e.preventDefault();
      }
      var title = pic.photo_title;
      var url = pic.photo_url;
      var fileurl = pic.photo_file_url;
  
      var infoHtml = '<div class="info"><h3>' + title +
        '</h3><div class="info-body">' +
        '<a href="' + url + '" target="_blank"><img src="' +
        fileurl + '" class="info-img"/></a></div>' +
        '<a href="http://www.panoramio.com/" target="_blank">' +
        '<img src="http://maps.google.com/intl/en_ALL/mapfiles/' +
        'iw_panoramio.png"/></a><br/>' +
        '<a href="' + pic.owner_url + '" target="_blank">' + pic.owner_name +
        '</a></div></div>';
  
      speedTest.infoWindow.setContent(infoHtml);
      speedTest.infoWindow.setPosition(latlng);
      speedTest.infoWindow.open(speedTest.map);
    };
  };
  
  speedTest.clear = function() {
    $('timetaken').innerHTML = 'cleaning...';
    for (var i = 0, marker; marker = speedTest.markers[i]; i++) {
      marker.setMap(null);
    }
  };
  
  speedTest.change = function() {
    speedTest.clear();
    speedTest.showMarkers();
  };
  
  speedTest.time = function() {
    $('timetaken').innerHTML = 'timing...';
    var start = new Date();
    if ($('usegmm').checked) {
      speedTest.markerClusterer = new MarkerClusterer(speedTest.map, speedTest.markers);
    } else {
      for (var i = 0, marker; marker = speedTest.markers[i]; i++) {
        marker.setMap(speedTest.map);
      }
    }
  
    var end = new Date();
    $('timetaken').innerHTML = end - start;
  };