This is how I did it for my pie chart.
Hope this helps!

Cheers,
Jré


      google.visualization.events.addListener(_pieChart, 'select',
mouseClickHandler);


      function mouseClickHandler()
      {

        var selection = _pieChart.getSelection();
        var currentSelection = 0;

        //first selection has only length 1 because there is no
'previous' selection
        if(selection.length == 1)
        {
          currentSelection = selection[0].row;
        }
        //all other selections are: selection[0] = previous,
selection[1] = current
        else
        {
          currentSelection = selection[1].row;
        }

        switch(currentSelection)
          {
           case 1:
              location.href = ('http://www.yoursite.com/');
             break;
            case 2:
                location.href = ('http://www.yoursite.com/');
                break;
            case 3:
                location.href = ('http://www.yoursite.com/');
                break;
           case 4:
              location.href = ('http://www.yoursite.com/');
              break;
            default:
              location.href = ('http://www.yoursite.com/');
         }
      }



On Mon, Aug 23, 2010 at 1:29 PM, Dario <[email protected]> wrote:

> Sorry for asking something probably trivial, but is there a simple way
> to open a URL when a user clicks a bar in an interactive bar chart?
>
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