I have try to re-implement the event handling example. But as you can
see, every column you click on, Column selected is always NONE, but u
may be clicking on column 1 or 2.

Anyone have any success on getting selected column?

This section of the code is never reach because Column is always
undefined:
else if (item.column != null) {
        var str = data.getFormattedValue(0, item.column);
        message += '{row:none, column:' + item.column + '}; value (row
0) = ' + str + '\n';
      }

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