How to display filter in Dropdown list

Hi

We have a requirement to display a filter in a drop down list when the user selects a value from the drop down the chart should only display the data matching to the selected value. I came across the similar demo from the link http://www.spchart.com/demo/helpdesk-dashboard. But still I don’t know how to display a drop-down list in the chart. The values in the drop-down list can be the values of a particular field in the list. I will be very grateful if someone can help me to bring a drop-down list in the chart and its values are fetched from a particular field of a SharePoint list. I also noticed that the tab “Configuration” missing in our dashboard designer, do we need that tab to accomplish this requirement?

Regards,
Rahul.