Pie Chart data from bean list

[kudos_ni_]

Hi All,

I have a list of object constructed from raw JSON data of the following format - the sample below shows one object:

"Position" : [ { 
            "AssetClass" : "Equity Securities",
            "Industry" : "Chemicals",
            "IndustryGroup" : "Materials",
            "PercentOfPortfolio" : 2.24,
            "Position" : 349399,
            "PricingDate" : "10/07/2010",
            "Sector" : "Materials",
            "SecurityName" : "MONSANTO CO",
            "SecurityType" : "EQUITIES",
            "SubIndustry" : "Fertilizers & Agricultural Chemicals",
            "Symbol" : "MON"
          }]

I use this list to populate a grid which allows grouping.

I want to create a pie chart which updates depending on what gouping is applied to the grid. But I am lost as to where to start.

For example, if the data is grouped by "Sector", I would want the pie chart to illustrate each slice as a sector, with the value being the sum of "PercentOfPortfolio" for all objects in that sector. I hope that makes sense.

I am not sure where to begin in adding this list to the chart.

Can anybody point me in the right direction?

Thanks.

[sven]

You can use a PieDataProvider for this for example.

But you can also do it manually if you want. Listen to the Store.DataChanged event (gets fired on grouping) and redo your charting.

[kudos_ni_]

Thanks.

I can't seem to find any examples of the use of the PieDataProvider and the API docs are not helpful.

Do you have any examples of implementing this?