Greying out legends not working for new google.charts.Line charts

[Pavankumar C]

Hi ,

I have a requirement to grey out the legends and hide the lines once user clicks on the legend. However, the lines are getting hidden but the legend is not getting greyed out. The same piece of code works with  all other visualization charts. The code is as below. 

google.visualization.events.addListener(chart, 'select', function () {

   

     var sel = chart.getSelection();

         // if selection length is 0, we deselected an element

         if (sel.length > 0) {

             // if row is undefined, we clicked on the legend

             if (sel[0].row === null) {

                 var col = sel[0].column;

                 if (columns[col] == col) {

                     // hide the data series

                     columns[col] = {

                         label: data.getColumnLabel(col),

                         type: data.getColumnType(col),

                         calc: function () {

                             return null;

                         }

                        

                     };

                     // grey out the legend entry

                     series[col - 1].color = '#CCCCCC';

                 }

                 else {

                     // show the data series

                     columns[col] = col;

                     series[col - 1].color = null;

                 }

                /* var view = new google.visualization.DataView(data);

                 view.setColumns(columns);

                 chart.draw(view, options);*/

                  var view = new google.visualization.DataView(data);

                 view.setColumns(columns);

                 chart.draw(view, options);

             }

         }

     });

anybody has an idea, why isnt working? 

[Sergey Grabkovsky]

Hi,

The Material charts don't yet support the option to change a particular series color.

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[pavankumar c]

ok thanks. Any idea when can it be released? any other alternatives?

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Regards,

Pavan Kumar