我一直在寻找使用实时客户端数据从Google Charts填充图表的可能性。我已经尝试过向后端发送请求的解决方案,但我希望将此方与客户端环境分开,并且API目前仍在进行开发。
这是标准饼图的示例代码
//JS Code
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
// Load the Visualization API and the piechart package.
google.load('visualization', '1.0', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart);
// Callback that creates and populates a data table,
// instantiates the pie chart, passes in the data and
// draws it.
function drawChart() {
// Create the data table.
var data = new google.visualization.DataTable();
data.addColumn('string', 'Topping');
data.addColumn('number', 'Slices');
data.addRows([
['Mushrooms', 3],
['Onions', 1],
['Olives', 1],
['Zucchini', 1],
['Pepperoni', 2]
]);
// Set chart options
var options = {'title':'How Much Pizza I Ate Last Night',
'width':400,
'height':300};
// Instantiate and draw our chart, passing in some options.
var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
//HTML Code
<div id="chart_div"></div>
有没有办法通过从使用jQuery甚至纯JavaScript显示的表中检索数据来填充Google Charts?我想它看起来像这样:
data.addRows([
[$('#textfield1').getAttribute('value'), 3],
[$('#textfield2').getAttribute('value'), 1],
[$('#textfield3').getAttribute('value'), 1],
[$('#textfield4').getAttribute('value'), 1],
[$('#textfield5').getAttribute('value'), 2]
]);
有没有人尝试这种做法,甚至知道是否有可能?
感谢任何输入!
答案 0 :(得分:0)
使用纯JavaScript,我们假设您在HTML DataTable
中拥有以上硬编码的rows
<table>
:
<table id="table">
<thead>
<tr>
<th>topping</th>
<th>slices</th>
</tr>
</thead>
<tbody>
<tr><td>Mushrooms</td><td>3</td></tr>
<tr><td>Onions</td><td>1</td></tr>
<tr><td>Olives</td><td>1</td></tr>
<tr><td>Zucchini</td><td>1</td></tr>
<tr><td>Pepperoni</td><td>2</td></tr>
</tbody>
</table>
然后您可以阅读该表格,并以此方式将其用作图表DataTable
的来源:
...
data.addColumn('string', 'Topping');
data.addColumn('number', 'Slices');
var tableRows = document.querySelectorAll('#table tbody tr');
for (var i=0;i<tableRows.length;i++) {
data.addRow([
tableRows[i].cells[0].textContent,
parseInt(tableRows[i].cells[1].textContent)
]);
}
...
参见演示 - &gt; http://jsfiddle.net/akLf3gL9/
注意parseInt(...)
重要的是我们在第2列注入的数据实际上是数字类型,否则可视化将失败。