Randomly colored US map using JVector

StackOverflow https://stackoverflow.com/questions/16290230

  •  13-04-2022
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Question

I have issues with coding US Map that would allow randomly assing colors to the US states map using JVector API. Here is the code:

<html>
  <script src="scripts/jquery-1.8.2.js"></script>
  <script src="scripts/jquery-jvectormap-1.2.2.min.js"></script>
  <script src="scripts/jquery-jvectormap-us-aea-en.js"></script>
<body>
  <div  id="us-map" style="position: relative;   width: 800px; height: 600px"></div>
  <script>

  <!--// I commented out this piece of script. It works fine. This is a test trial to load the map
    // $(function(){
    // $('#us-map').vectorMap({map: 'us_aea_en'});
    // });
    -->

    <!-- I have issues with the following function -->
/*it does not even load the map. What it should do is to generate random colors
* for the map as the "update" button is pressed 
*/
$(function(){
  var palette = ['#66C2A5', '#FC8D62', '#8DA0CB', '#E78AC3', '#A6D854'];
      generateColors = function(){
        var colors = {},
            key;

        for (key in map.regions) {
          colors[key] = palette[Math.floor(Math.random()*palette.length)];
        }
        return colors;
      },
      map;

  map = new jvm.USMap({
    map: 'us_aea_en',
    container: $('#map'),
    series: {
      regions: [{
        attribute: 'fill'
      }]
    }
  });
  map.series.regions[0].setValues(generateColors());
  $('#update-colors-button').click(function(e){
    e.preventDefault();
    map.series.regions[0].setValues(generateColors());
  });
})
    </script>
    </div>
  </body>
</html>

Here is the link to my scripts folder where I keep the .js files. What is wrong with the function()?

Was it helpful?

Solution

Your Question is related to code directly copies from http://jvectormap.com/examples/random-colors/

The Code to make the random USA map work is this:

Taken from their source with only (Taken from their source with only map: changes to be USA).

<html>
  <script src="scripts/jquery-1.8.2.js"></script>
  <script src="scripts/jquery-jvectormap-1.2.2.min.js"></script>
  <script src="scripts/jquery-jvectormap-us-aea-en.js"></script>
<body>
  <div  id="map" style="position: relative;   width: 800px; height: 600px"></div>

 <script>
      //@code_start
      $(function(){
        var palette = ['#66C2A5', '#FC8D62', '#8DA0CB', '#E78AC3', '#A6D854'];
            generateColors = function(){
              var colors = {},
                  key;

              for (key in map.regions) {
                colors[key] = palette[Math.floor(Math.random()*palette.length)];
              }
              return colors;
            },
            map;

        map = new jvm.WorldMap({
          map: 'us_aea_en',
          container: $('#map'),
          series: {
            regions: [{
              attribute: 'fill'
            }]
          }
        });
        map.series.regions[0].setValues(generateColors());
        $('#update-colors-button').click(function(e){
          e.preventDefault();
          map.series.regions[0].setValues(generateColors());
        });
      })
      //@code_end
    </script>   
    </div>
  </body>
</html>

The error below:

was generated, on first inspection:

Error: ReferenceError: map is not defined
Source File: file:///D:/xampp_october_28_2011/htdocs/stackoverflow/scripts/map.html
Line: 30

You have not the map variable before you attempt to use it. Additionally, it seems your code is hiding various other errors which need repairing.

Also posted to dropbox: https://dl.dropboxusercontent.com/u/6465647/mapRandom.html

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