更改没有CSS的彩色文本甘特图google（javascript）

Question

如何不使用或插入CSS更改左侧文本的颜色？ 此代码与文档相同。 我知道颜色取决于资源。 我不会更改活动栏的颜色，而只会更改与之关联的文本。

  google.charts.load('current', {'packages':['gantt']}); google.charts.setOnLoadCallback(drawChart); function drawChart() { var data = new google.visualization.DataTable(); data.addColumn('string', 'Task ID'); data.addColumn('string', 'Task Name'); data.addColumn('string', 'Resource'); data.addColumn('date', 'Start Date'); data.addColumn('date', 'End Date'); data.addColumn('number', 'Duration'); data.addColumn('number', 'Percent Complete'); data.addColumn('string', 'Dependencies'); data.addRows([ ['2014Spring', 'Spring 2014', 'spring', new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null], ['2014Summer', 'Summer 2014', 'summer', new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null], ['2014Autumn', 'Autumn 2014', 'autumn', new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null], ['2014Winter', 'Winter 2014', 'winter', new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null], ['2015Spring', 'Spring 2015', 'spring', new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null], ['2015Summer', 'Summer 2015', 'summer', new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null], ['2015Autumn', 'Autumn 2015', 'autumn', new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null], ['2015Winter', 'Winter 2015', 'winter', new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null], ['Football', 'Football Season', 'sports', new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null], ['Baseball', 'Baseball Season', 'sports', new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null], ['Basketball', 'Basketball Season', 'sports', new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null], ['Hockey', 'Hockey Season', 'sports', new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null] ]); var options = { height: 400, gantt: { trackHeight: 30 } }; var chart = new google.visualization.Gantt(document.getElementById('chart_div')); chart.draw(data, options); } 

 <script src="https://www.gstatic.com/charts/loader.js"></script> <div id="chart_div"></div> 

Answer 1

根据配置选项 ，使用选项-> gantt.labelStyle

gantt: {
  labelStyle: {
    color: '#ff0000',
    fontName: 'Arial',
    fontSize: 20
  }
}

尽管fontName和fontSize似乎可以正常工作，
color不...

请注意，在以下工作代码段中颜色没有变化...

 google.charts.load('current', { callback: drawChart, packages: ['gantt'] }); function drawChart() { var data = new google.visualization.DataTable(); data.addColumn('string', 'Task ID'); data.addColumn('string', 'Task Name'); data.addColumn('string', 'Resource'); data.addColumn('date', 'Start Date'); data.addColumn('date', 'End Date'); data.addColumn('number', 'Duration'); data.addColumn('number', 'Percent Complete'); data.addColumn('string', 'Dependencies'); data.addRows([ ['2014Spring', 'Spring 2014', 'spring', new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null], ['2014Summer', 'Summer 2014', 'summer', new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null], ['2014Autumn', 'Autumn 2014', 'autumn', new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null], ['2014Winter', 'Winter 2014', 'winter', new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null], ['2015Spring', 'Spring 2015', 'spring', new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null], ['2015Summer', 'Summer 2015', 'summer', new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null], ['2015Autumn', 'Autumn 2015', 'autumn', new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null], ['2015Winter', 'Winter 2015', 'winter', new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null], ['Football', 'Football Season', 'sports', new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null], ['Baseball', 'Baseball Season', 'sports', new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null], ['Basketball', 'Basketball Season', 'sports', new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null], ['Hockey', 'Hockey Season', 'sports', new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null] ]); var options = { height: 400, gantt: { trackHeight: 30, labelStyle: { color: '#ff0000', fontName: 'Arial', fontSize: 20 } } }; var container = document.getElementById('chart_div'); var chart = new google.visualization.Gantt(container); chart.draw(data, options); } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://www.gstatic.com/charts/loader.js"></script> <div id="chart_div"></div> 

---

一种选择是使用脚本手动更改颜色

首先，需要从底部日期标签中识别行标签
为此，请测试'Task Name'的数据表列中是否存在标签值
使用数据表方法-> getFilteredRows

手动更改颜色的唯一问题是
图表会将颜色更改回原始颜色，
只要有活动，例如将鼠标悬停在行和/或行标签上

因此，需要使用MutationObserver或其他方法，
保持新颜色

请参阅以下工作片段...

 google.charts.load('current', { callback: drawChart, packages: ['gantt'] }); function drawChart() { var data = new google.visualization.DataTable(); data.addColumn('string', 'Task ID'); data.addColumn('string', 'Task Name'); data.addColumn('string', 'Resource'); data.addColumn('date', 'Start Date'); data.addColumn('date', 'End Date'); data.addColumn('number', 'Duration'); data.addColumn('number', 'Percent Complete'); data.addColumn('string', 'Dependencies'); data.addRows([ ['2014Spring', 'Spring 2014', 'spring', new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null], ['2014Summer', 'Summer 2014', 'summer', new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null], ['2014Autumn', 'Autumn 2014', 'autumn', new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null], ['2014Winter', 'Winter 2014', 'winter', new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null], ['2015Spring', 'Spring 2015', 'spring', new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null], ['2015Summer', 'Summer 2015', 'summer', new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null], ['2015Autumn', 'Autumn 2015', 'autumn', new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null], ['2015Winter', 'Winter 2015', 'winter', new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null], ['Football', 'Football Season', 'sports', new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null], ['Baseball', 'Baseball Season', 'sports', new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null], ['Basketball', 'Basketball Season', 'sports', new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null], ['Hockey', 'Hockey Season', 'sports', new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null] ]); var options = { height: 400, gantt: { trackHeight: 30, labelStyle: { fontName: 'Arial', fontSize: 20 } } }; var container = document.getElementById('chart_div'); var chart = new google.visualization.Gantt(container); var observer = new MutationObserver(function () { $.each($('text'), function (index, label) { var rowIndex = data.getFilteredRows([{ column: 1, value: $(label).text() }]); if (rowIndex.length > 0) { $(label).attr('fill', '#ff0000') } }); }); observer.observe(container, { childList: true, subtree: true }); chart.draw(data, options); } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://www.gstatic.com/charts/loader.js"></script> <div id="chart_div"></div>