我已经使用Google Charts API创建了一个圆环图。单击每个切片时,它应增加10个单位,并将相邻切片(顺时针)减少10个单位。到目前为止我所提供的是一个警告弹出窗口,解释了这一点,但我想用新值重绘图表。
这是我的代码:
<html>
<head>
<!--Load the AJAX API-->
<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', 'Option');
data.addColumn('number', 'Value');
data.addRows([
['Option A', 40],
['Option B', 30],
['Option C', 30]
]);
// Set chart options
var options = {
height: 300,
fontName: 'Lato, sans-serif',
title: 'Values per option',
titleTextStyle: {
color: '#5a5a5a',
fontSize: 20,
bold: true,
align: 'center'
},
pieHole: 0.6,
slices: {
0: {color: 'red'},
1: {color: 'blue'},
2: {color: 'green'}
},
legend: {
position: 'bottom',
textStyle: {
color: '#5a5a5a',
fontSize: 14
}
},
enableInteractivity: true,
pieSliceText: 'none'
};
// Instantiate and draw our chart, passing in some options.
var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
function selectHandler() {
var selectedItem = chart.getSelection()[0];
if (selectedItem && selectedItem.row <2) {
var activeTrait = data.getValue(selectedItem.row, 0);
activePerc = data.getValue(selectedItem.row, 1);
activePercNew = parseInt(activePerc)+10
adjaceTrait = data.getValue(selectedItem.row+1, 0);
adjacePerc = data.getValue(selectedItem.row+1, 1);
adjacePercNew = parseInt(adjacePerc)-10
alert(activeTrait + ' has a value of ' + activePerc + '%. The new value will now be set to ' + activePercNew + '% and ' + adjaceTrait + ' will be corrected to ' + adjacePercNew + '%.');
}
if (selectedItem && selectedItem.row == 2) {
var activeTrait = data.getValue(selectedItem.row, 0);
activePerc = data.getValue(selectedItem.row, 1);
activePercNew = parseInt(activePerc)+10
adjaceTrait = data.getValue(selectedItem.row-2, 0);
adjacePerc = data.getValue(selectedItem.row-2, 1);
adjacePercNew = parseInt(adjacePerc)-10
alert(activeTrait + ' has a value of ' + activePerc + '%. The new value will now be set to ' + activePercNew + '% and ' + adjaceTrait + ' will be corrected to ' + adjacePercNew + '%.');
}
}
google.visualization.events.addListener(chart, 'select', selectHandler);
chart.draw(data, options);
}
</script>
</head>
<body>
<!--Div that will hold the pie chart-->
<div id="chart_div" style="width:800; height:300"></div>
</body>
</html>
我只想通过单击一个切片来调整选定和相邻切片的大小。