Add Local Search to Google Maps

Monday, May 9, 2011

Customize your Google Maps to add Pizza , Parks , Places of interest,
Hotels and all what you think is important from your websites commercial
point of view . In this thread we are going to show you how you can
add customized Local Search to your website .


Requirements For Google Maps Local Search


Even though Google Maps V3 API doesn't require a Google
Map Api Key , but to use Google Local Search you need to
get a API Key .


Integrate Google Local Search to Google Maps

1) Initialize the local searcher and set the Call back
     function when the search is completed .  
 
 gLocalSearch = new GlocalSearch();
 gLocalSearch.setSearchCompleteCallback(null, OnLocalSearch);


2)Define the input parameters from where you will take the
search parameters . Once we have the search parameters we
define the Search Center Point and execute the search.
    function doSearch() {
      var query = document.getElementById("queryInput").value;
      gLocalSearch.setCenterPoint(gMap.getCenter());
      gLocalSearch.execute(query);
    }

3) After the Local Search function returns a result we have
to display markers representing the search results . The
markers will have a infowindow displaying the address and
other contact details of the place .

The full code of the Google Maps Local Search goes as follows
<html> 
  <head> 
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/> 
    <title>Google AJAX Local Search API + Maps API v3 demo</title> 
    <link href="http://www.google.com/uds/css/gsearch.css" rel="stylesheet" type="text/css"/> 
    <link href="./places.css" rel="stylesheet" type="text/css"/> 
 
    <script src="http://maps.google.com/maps/api/js?sensor=false"></script> 
    <script src="http://www.google.com/uds/api?file=uds.js&v=1.0&key=ABQIAAAAprwmHxNNm8OiTZgaNvJYGBT2yXp_ZAY8_ufC3CFXhHIE1NvwkxSLkUgytlZc-bH0DrooX8yigzsWVQ" type="text/javascript"></script> 
    <script type="text/javascript"> 
    
 
    // Our global state
    var gLocalSearch;
    var gMap;
    var gInfoWindow;
    var gSelectedResults = [];
    var gCurrentResults = [];
    var gSearchForm;
 
    // Create our "tiny" marker icon
    var gYellowIcon = new google.maps.MarkerImage(
      "http://labs.google.com/ridefinder/images/mm_20_yellow.png",
      new google.maps.Size(12, 20),
      new google.maps.Point(0, 0),
      new google.maps.Point(6, 20));
    var gRedIcon = new google.maps.MarkerImage(
      "http://labs.google.com/ridefinder/images/mm_20_red.png",
      new google.maps.Size(12, 20),
      new google.maps.Point(0, 0),
      new google.maps.Point(6, 20));
    var gSmallShadow = new google.maps.MarkerImage(
      "http://labs.google.com/ridefinder/images/mm_20_shadow.png",
      new google.maps.Size(22, 20),
      new google.maps.Point(0, 0),
      new google.maps.Point(6, 20));
 
     // Set up the map and the local searcher.
    function OnLoad() {
 
      // Initialize the map with default UI.
      gMap = new google.maps.Map(document.getElementById("map"), {
        center: new google.maps.LatLng(37.4419, -122.1419),
        zoom: 13,
        mapTypeId: 'roadmap'
      });
      // Create one InfoWindow to open when a marker is clicked.
      gInfoWindow = new google.maps.InfoWindow;
      google.maps.event.addListener(gInfoWindow, 'closeclick', function() {
        unselectMarkers();
      });
 
      // Initialize the local searcher
      gLocalSearch = new GlocalSearch();
      gLocalSearch.setSearchCompleteCallback(null, OnLocalSearch);
    }
 
    function unselectMarkers() {
      for (var i = 0; i < gCurrentResults.length; i++) {
        gCurrentResults[i].unselect();
      }
    }
 
    function doSearch() {
      var query = document.getElementById("queryInput").value;
      gLocalSearch.setCenterPoint(gMap.getCenter());
      gLocalSearch.execute(query);
    }
 
    // Called when Local Search results are returned, we clear the old
    // results and load the new ones.
    function OnLocalSearch() {
      if (!gLocalSearch.results) return;
      var searchWell = document.getElementById("searchwell");
 
      // Clear the map and the old search well
      searchWell.innerHTML = "";
      for (var i = 0; i < gCurrentResults.length; i++) {
        gCurrentResults[i].marker().setMap(null);
      }
      // Close the infowindow
      gInfoWindow.close();
 
      gCurrentResults = [];
      for (var i = 0; i < gLocalSearch.results.length; i++) {
        gCurrentResults.push(new LocalResult(gLocalSearch.results[i]));
      }
 
      var attribution = gLocalSearch.getAttribution();
      if (attribution) {
        document.getElementById("searchwell").appendChild(attribution);
      }
 
      // Move the map to the first result
      var first = gLocalSearch.results[0];
      gMap.setCenter(new google.maps.LatLng(parseFloat(first.lat),
                                            parseFloat(first.lng)));
 
    }
 
    // Cancel the form submission, executing an AJAX Search API search.
    function CaptureForm(searchForm) {
      gLocalSearch.execute(searchForm.input.value);
      return false;
    }
 
 
 
    // A class representing a single Local Search result returned by the
    // Google AJAX Search API.
    function LocalResult(result) {
      var me = this;
      me.result_ = result;
      me.resultNode_ = me.node();
      me.marker_ = me.marker();
      google.maps.event.addDomListener(me.resultNode_, 'mouseover', function() {
        // Highlight the marker and result icon when the result is
        // mouseovered.  Do not remove any other highlighting at this time.
        me.highlight(true);
      });
      google.maps.event.addDomListener(me.resultNode_, 'mouseout', function() {
        // Remove highlighting unless this marker is selected (the info
        // window is open).
        if (!me.selected_) me.highlight(false);
      });
      google.maps.event.addDomListener(me.resultNode_, 'click', function() {
        me.select();
      });
      document.getElementById("searchwell").appendChild(me.resultNode_);
    }
 
    LocalResult.prototype.node = function() {
      if (this.resultNode_) return this.resultNode_;
      return this.html();
    };
 
    // Returns the GMap marker for this result, creating it with the given
    // icon if it has not already been created.
    LocalResult.prototype.marker = function() {
      var me = this;
      if (me.marker_) return me.marker_;
      var marker = me.marker_ = new google.maps.Marker({
        position: new google.maps.LatLng(parseFloat(me.result_.lat),
                                         parseFloat(me.result_.lng)),
        icon: gYellowIcon, shadow: gSmallShadow, map: gMap});
      google.maps.event.addListener(marker, "click", function() {
        me.select();
      });
      return marker;
    };
 
    // Unselect any selected markers and then highlight this result and
    // display the info window on it.
    LocalResult.prototype.select = function() {
      unselectMarkers();
      this.selected_ = true;
      this.highlight(true);
      gInfoWindow.setContent(this.html(true));
      gInfoWindow.open(gMap, this.marker());
    };
 
    LocalResult.prototype.isSelected = function() {
      return this.selected_;
    };
 
    // Remove any highlighting on this result.
    LocalResult.prototype.unselect = function() {
      this.selected_ = false;
      this.highlight(false);
    };
 
    // Returns the HTML we display for a result before it has been "saved"
    LocalResult.prototype.html = function() {
      var me = this;
      var container = document.createElement("div");
      container.className = "unselected";
      container.appendChild(me.result_.html.cloneNode(true));
      return container;
    }
 
    LocalResult.prototype.highlight = function(highlight) {
      this.marker().setOptions({icon: highlight ? gRedIcon : gYellowIcon});
      this.node().className = "unselected" + (highlight ? " red" : "");
    }
 
    GSearch.setOnLoadCallback(OnLoad);
   
    </script> 
  </head> 
  <body style="font-family: Arial, sans-serif; font-size: small;"> 
    <p>Perform a local search on the map below:</p> 
    <div style="width: 500px;"> 
      <div style="margin-bottom: 5px;"> 
        <div> 
          <input type="text" id="queryInput" value="pizza" style="width: 250px;"/> 
          <input type="button" value="Find" onclick="doSearch()"/> 
        </div> 
      </div> 
      <div style="position: absolute; left: 540px;"> 
        <div id="searchwell"></div> 
      </div> 
      <div id="map" style="height: 350px; border: 1px solid #979797;"></div> 
    </div> 
 
  </body> 
</html> 
   
Your Google Map should look like this now !!


You can also mashup the Local Search with your Websites Google Maps theme
like store locator ,taxi services and could be of a great use in tourist website where
you can give your customized views and ratings on Google Local Search Results.

Category:

About Author: The Author is a last year B.E student from KJ Somiaya College of Engineering(Mumbai) and is currently employed with Infosys .

4 comments

  1. Anonymous says:

    Why only 4 results are shown?