如何捕获Google Charts饼图切片的颜色值？

Question

我有一个如何使饼图与表交互的工作示例。我想添加的是它们相关性的视觉提示。我见过的唯一例子是表格行被adding a listener突出显示的地方。我想在表格中添加一个空单元格，其背景颜色就是它所对应的饼图片的颜色。我如何捕捉饼图的颜色？ JSFiddle

我现在拥有的一切：

google.load("visualization", "1", {packages:["corechart","table"]}); 
    google.setOnLoadCallback(drawProductAllocationChart); 
    function drawProductAllocationChart() { 
    var data = google.visualization.arrayToDataTable([ 
     ['Name', 'Allocation'], 
     ['Product A', 25], 
     ['Product B', 50], 
     ['Product C', 15], 
     ['Product D', 10] 
    ]); 

    var options = { 
     //title: 'My Daily Activities' 
     is3D: true 
    }; 

    var productAllocationChart = new google.visualization.PieChart(document.getElementById('product-allocation-chart')); 
    productAllocationChart.draw(data, options); 

    var productAllocationTable = new google.visualization.Table(document.getElementById('product-allocation-table')); 
    productAllocationTable.draw(data, null); 

    // When the table is selected, update the orgchart. 
    google.visualization.events.addListener(productAllocationTable, 'select', function() { 
     portfolioAllocationChart.setSelection(productAllocationTable.getSelection()); 
    }); 

    // When the orgchart is selected, update the table visualization. 
    google.visualization.events.addListener(productAllocationChart, 'select', function() { 
     productAllocationTable.setSelection(productAllocationChart.getSelection()); 
    }); 
    } 

谢谢！

Answer 1

我的第一个想法是为Google图表创建一个默认颜色的地图。尽管如此，我还没有使用可视化API的数据表。

从Google Group我得到了31默认颜色这份名单：

["#3366cc","#dc3912","#ff9900","#109618","#990099","#0099c6","#dd4477","#66aa00","#b82e2e","#316395","#994499","#22aa99","#aaaa11","#6633cc","#e67300","#8b0707","#651067","#329262","#5574a6","#3b3eac","#b77322","#16d620","#b91383","#f4359e","#9c5935","#a9c413","#2a778d","#668d1c","#bea413","#0c5922","#743411"] 

我假设你知道为了使事情被添加到饼图，它最可能对应于行内的顺序桌子。如果是这种情况，那么只需将数组映射到该行即可。