javascript - 谷歌图表 : How to get the percentage values of every slice in a pie chart?

Question

我想获取每个切片的百分比值，目前我可以获得所选标签的名称，但我想获取每个标签的百分比值。我找不到方法来做到这一点，这可能吗？

http://jsfiddle.net/oaobxych/4/

function selectHandler() {
          var selectedItem = chart.getSelection()[0];
          if (selectedItem) {
            var version = data.getValue(selectedItem.row, 0);
            alert('The user selected ' + version);
          }
        }

Answer 1

也许你需要计算一下。

    var total = 0;
    for (var f = 0; f < data.getNumberOfRows(); f++){
        total += data.getValue(f, 1);
    }
      var selectedItem = chart.getSelection()[0];
      if (selectedItem) {
        var percentage = (data.getValue(selectedItem.row,1)*100/total).toFixed(1);
        var version = data.getValue(selectedItem.row, 0);
        alert('The user selected ' + version + ' a ' + percentage + '% of total');
      }
    }

http://jsfiddle.net/oaobxych/7/