javascript - Google Visualization，你能根据列的值分配切片的颜色吗？

Question

我正在尝试根据值分配颜色，但这不起作用，它只是分配默认值。此方法适用于其他图表类型。请记住，我不能在选项中使用颜色，因为行的顺序可能不同。有什么想法吗？

var data = new google.visualization.DataTable();        
  data.addColumn('string', 'Status');
  data.addColumn('number', 'Count');
  data.addColumn({type: 'string', role: 'style'});
  data.addRow(['Failure', 8,'color:#EE4A49']);
  data.addRow(['Warning', 1,'color:#E3d157']);
  data.addRow(['Success', 1,'color:#45B7AF']); 

http://jsfiddle.net/zYS27/15/

Answer 1

基于 on the current API我认为您可能需要在将数据传递给 Google Charts 之前对其进行预处理。

var data = new google.visualization.DataTable();        
  data.addColumn('string', 'Status');
  data.addColumn('number', 'Count');
  data.addColumn({type: 'string', role: 'style'});
  data.addRow(['Failure', 8,'color:#EE4A49']);
  data.addRow(['Warning', 1,'color:#E3d157']);
  data.addRow(['Success', 1,'color:#45B7AF']);

var myColors = { 'Failure' : 'red', 'Success': 'green', 'Warning': 'yellow' };

var slicesColor = {};

for( var i=0; i < data.getNumberOfRows(); i++){
  // I assume the label is in the first column of each row here
  // this is based on string matching, but you can define any criteria you want
  slicesColor[i] = {color: myColors[data.getValue(i, 0)] };
}

var options = {
  ...
  slices: slicesColor
}

var chart = new google.visualization.PieChart(document.getElementById('chart'));
  chart.draw(data, option);   
}
...