单击以添加一个点(Click to add a point)
我们已经在Highcharts Configuration Syntax一章中看到了用于绘制图表的配置 。
下面给出了具有点加法能力的图表的示例。
配置 (Configurations)
现在让我们看一下所采取的其他配置/步骤。
chart.events
将click方法添加到chart.event属性中。 此方法使用图表中单击区域的x，y坐标向系列添加新点。
chart: {
events: {
click: function (e) {
// find the clicked values and the series
var x = e.xAxis[0].value,
y = e.yAxis[0].value,
series = this.series[0];
// Add it
series.addPoint([x, y]);
}
}
}
例子 (Example)
highcharts_dynamic_click.htm
<html>
<head>
<title>Highcharts Tutorial</title>
<script src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">
</script>
<script src = "https://code.highcharts.com/highcharts.js"></script>
</head>
<body>
<div id = "container" style = "width: 550px; height: 400px; margin: 0 auto"></div>
<script language = "JavaScript">
$(document).ready(function() {
var chart = {
type: 'scatter',
margin: [70, 50, 60, 80],
events: {
click: function (e) {
// find the clicked values and the series
var x = e.xAxis[0].value,
y = e.yAxis[0].value,
series = this.series[0];
// Add it
series.addPoint([x, y]);
}
}
};
var title = {
text: 'User supplied data'
};
var subtitle = {
text: 'Click the plot area to add a point. Click a point to remove it.'
};
var xAxis = {
gridLineWidth: 1,
minPadding: 0.2,
maxPadding: 0.2,
maxZoom: 60
};
var yAxis = {
title: {
text: 'Value'
},
minPadding: 0.2,
maxPadding: 0.2,
maxZoom: 60,
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
};
var legend = {
enabled: false
};
var exporting = {
enabled: false
};
var plotOptions = {
series: {
lineWidth: 1,
point: {
events: {
'click': function () {
if (this.series.data.length > 1) {
this.remove();
}
}
}
}
}
};
var series = [{
data: [[20, 20], [80, 80]]
}];
var json = {};
json.chart = chart;
json.title = title;
json.subtitle = subtitle;
json.xAxis = xAxis;
json.yAxis = yAxis;
json.legend = legend;
json.exporting = exporting;
json.series = series;
json.plotOptions = plotOptions;
$('#container').highcharts(json);
});
</script>
</body>
</html>
结果 (Result)
验证结果。
新页面打开