Hi You are correct and indeed in order to access the data from the ChartWrapper, you need to take a snapshot of the ChartWrapper which contains a static version of the current data. For example, you can call wrapper.getSnapshot().getDataTable(); Notice that if you have a custom view over the table, this might not work as you expect.
Hope this helps, Viz Kid On Mon, Sep 5, 2011 at 8:44 AM, Kirill N <[email protected]> wrote: > I create a chart using ChartWrapper (http://code.google.com/apis/chart/ > interactive/docs/reference.html#chartwrapperobject) that loads data > from a remote source i.e. via dataSourceUrl(). Now I'd like to add > interactivity to catch clicks. The code to getSelection() works just > fine and give me an object with row and column number - just like it's > described at > http://code.google.com/apis/chart/interactive/docs/events.html#The_Select_Event > > My problem is getting a value for those rows and columns. > > If I do wrapper.getDataTable() I get null (it's documented and > expected since chart is created from remote data source). > > Documentation suggests making data a global object so it can be > accessed: > > "In order to read the selected data, you'll need to call > DataTable.getValue() in your handler; the simplest way to enable that > is to make the DataTable object global." > > Question is, when data is loaded from remote data source during a call > to draw(), how can I catch it or get to it to store it in a global > object for future access? Can't seem to find any reference to this in > documentation or on the web. > > -- > You received this message because you are subscribed to the Google Groups > "Google Visualization API" group. > To post to this group, send email to > [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-visualization-api?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-visualization-api?hl=en.
