有没有办法将一些额外的数据传递给series对象,用来在图表的“工具提示”中显示?
例如
tooltip: {
formatter: function() {
return '<b>'+ this.series.name +'</b><br/>'+
Highcharts.dateFormat('%b %e', this.x) +': '+ this.y;
}
这里我们只能使用series.name,this.x & this.y到这个系列。假设我需要单独传递另一个动态值和数据集,并且可以通过series对象访问。这个是可能的吗?
提前感谢大家。
发布于 2011-12-15 13:47:21
可以,如果您像下面这样设置series对象,其中每个数据点都是一个散列,那么您可以传递额外的值:
new Highcharts.Chart( {
...,
series: [ {
name: 'Foo',
data: [
{
y : 3,
myData : 'firstPoint'
},
{
y : 7,
myData : 'secondPoint'
},
{
y : 1,
myData : 'thirdPoint'
}
]
} ]
} );
在您的工具提示中,您可以通过传入的对象的"point“属性访问它:
tooltip: {
formatter: function() {
return 'Extra data: <b>' + this.point.myData + '</b>';
}
}
发布于 2018-01-04 18:11:09
对于时间序列数据,特别是具有足够的数据点来激活turbo threshold的情况下,上述建议的解决方案将不起作用。在turbo阈值的情况下,这是因为Highcarts希望数据点是如下所示的数组:
series: [{
name: 'Numbers over the course of time',
data: [
[1515059819853, 1],
[1515059838069, 2],
[1515059838080, 3],
// you get the idea
]
}]
为了不失去加速阈值的好处(这在处理大量数据点时很重要),我将数据存储在图表外部,并在工具提示formatter
函数中查找数据点。下面是一个例子:
const chartData = [
{ timestamp: 1515059819853, value: 1, somethingElse: 'foo'},
{ timestamp: 1515059838069, value: 2, somethingElse: 'bar'},
{ timestamp: 1515059838080, value: 3, somethingElse: 'baz'},
// you get the idea
]
const Chart = Highcharts.stockChart(myChart, {
// ...options
tooltip: {
formatter () {
// this.point.x is the timestamp in my original chartData array
const pointData = chartData.find(row => row.timestamp === this.point.x)
console.log(pointData.somethingElse)
}
},
series: [{
name: 'Numbers over the course of time',
// restructure the data as an array as Highcharts expects it
// array index 0 is the x value, index 1 is the y value in the chart
data: chartData.map(row => [row.timestamp, row.value])
}]
})
此方法适用于所有图表类型。
发布于 2016-03-24 09:06:34
我使用AJAX从SQL Server获取数据,然后准备一个js数组作为图表中的数据。在AJAX成功后编写JavaScript代码:
...,
success: function (data) {
var fseries = [];
var series = [];
for (var arr in data) {
for (var i in data[arr]['data'] ){
var d = data[arr]['data'][i];
//if (i < 5) alert("d.method = " + d.method);
var serie = {x:Date.parse(d.Value), y:d.Item, method:d.method };
series.push(serie);
}
fseries.push({name: data[arr]['name'], data: series, location: data[arr]['location']});
series = [];
};
DrawChart(fseries);
},
现在,要在工具提示中显示额外的元数据:
...
tooltip: {
xDateFormat: '%m/%d/%y',
headerFormat: '<b>{series.name}</b><br>',
pointFormat: 'Method: {point.method}<br>Date: {point.x:%m/%d/%y } <br>Reading: {point.y:,.2f}',
shared: false,
},
我使用DataRow来迭代我的结果集,然后在以Json格式传回之前,我使用一个类来赋值。下面是Ajax调用的控制器操作中的C#代码。
public JsonResult ChartData(string dataSource, string locationType, string[] locations, string[] methods, string fromDate, string toDate, string[] lstParams)
{
List<Dictionary<string, object>> dataResult = new List<Dictionary<string, object>>();
Dictionary<string, object> aSeries = new Dictionary<string, object>();
string currParam = string.Empty;
lstParams = (lstParams == null) ? new string[1] : lstParams;
foreach (DataRow dr in GetChartData(dataSource, locationType, locations, methods, fromDate, toDate, lstParams).Rows)
{
if (currParam != dr[1].ToString())
{
if (!String.IsNullOrEmpty(currParam)) //A new Standard Parameter is read and add to dataResult. Skips first record.
{
Dictionary<string, object> bSeries = new Dictionary<string, object>(aSeries); //Required else when clearing out aSeries, dataResult values are also cleared
dataResult.Add(bSeries);
aSeries.Clear();
}
currParam = dr[1].ToString();
aSeries["name"] = cParam;
aSeries["data"] = new List<ChartDataModel>();
aSeries["location"] = dr[0].ToString();
}
ChartDataModel lst = new ChartDataModel();
lst.Value = Convert.ToDateTime(dr[3]).ToShortDateString();
lst.Item = Convert.ToDouble(dr[2]);
lst.method = dr[4].ToString();
((List<ChartDataModel>)aSeries["data"]).Add(lst);
}
dataResult.Add(aSeries);
var result = Json(dataResult.ToList(), JsonRequestBehavior.AllowGet); //used to debug final dataResult before returning to AJAX call.
return result;
}
我意识到有一种更有效、更容易接受的C#编码方式,但我继承了这个项目。
https://stackoverflow.com/questions/8514457
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