setData method

@override void setData(List<PieChartItem> items)

Implementation

@override
setData(List<PieChartItem> items) {
  items.sort((a, b) => -a.weight.compareTo(b.weight));
  totalWeight = items.map((item) => item.weight).reduce((a, b) => a + b);
  if (items.length > maxLabels) {
    var lefts = items.sublist(maxLabels - 1);
    items = items.sublist(0, maxLabels - 1);
    var leftWeight = lefts.map((i) => i.weight).reduce((a, b) => a + b);
    items.add(PieChartItem('other..', leftWeight)
      ..description = lefts.map((i) => '${(100 * i.weight / totalWeight).toStringAsFixed(2)}% ${i.label}').join('<br/>'));
  }
  var c = 0;
  for (var i = 0; i < items.length; i++) {
    if (i == items.length - 1 && c == 0) {
      //make sure last color is different than first
      c = 1;
    }
    items[i].color = _colors[c];
    c++;
    if (c >= _colors.length) {
      c = 0;
    }
  }
  super.setData(items);
}