Communicating with a chart

[John Fisher]

Using  bar chart in GWT 2.x I can instantiate it just like the
tutorial, but when I try to change it with a draw method I get
nothing. What am I doing wrong?

        private void randomData(BarChart bar) {

                bar.draw( updateTable() );
        }

private AbstractDataTable updateTable() {
            // Underlying data
            DataTable data = DataTable.create();
            data.addColumn(ColumnType.STRING, "Item");
            data.addColumn(ColumnType.NUMBER, "item per sec");

            // now create some values
            String message = "";
            final int MAX_VALUE = 10;
            int nit = Random.nextInt(MAX_VALUE) ;
            int gnat = Random.nextInt(MAX_VALUE) ;
            int pit = Random.nextInt(MAX_VALUE) ;

            data.addRows(3);
            data.setValue(0, 0, "Nits");
            data.setValue(0, 1, nit);
            data.setValue(1, 0, "Gnats");
            data.setValue(1, 1, gnat);
            data.setValue(2, 0, "Pits");
            data.setValue(2, 1, pit);
            message +=  nit + " valu " + nit + " other " + gnat;
//Window.alert(message);
            return data;
          }
}

//////////////////////

thanks.

John

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