How to use HQChart tutorial 30-K-line chart how to dock third party data 26-Indicator script custom function
Add system custom variable functions
JSComplier.AddFunction(obj) can add a custom function to HQChart, which is called before SetOption.
JSComplier.AddVariant({
{
Name:"函数名", Description:"函数描述信息", IsDownload:"是否需要下载数据true/false", Invoke:"方法回调" } );
Name
Function name
Description
Function description information
IsDownload
Whether to download data, if set to false, the NetworkFilter callback will not be triggered
true/false
Invoke
Function method implementation
Custom function data interface
Get data through NetworkFilter callback
this.NetworkFilter=function(data, callback)
{
console.log('[KLineChart::NetworkFilter] data', data);
switch(data.Name)
{
case 'JSSymbolData::GetCustomFunctionData': //自定义函数数据下载
this.GetCustomFunctionData(data, callback);
break;
}
}
Protocol name-custom function data download
The class name and function name of the corresponding code: JSSymbolData::GetCustomFunctionData
Screenshot of protocol log
Parameter Description
Request field description
FunctionName
Function name
JobItem.Args
parameter list
daterange
K-line data date range
Return json data structure
Data
Data {Date: date, Time: time (only available on minute K-line), Value: numeric value}
DataType
Data structure type
0 = array type, data smoothing
1 = single-valued data
2 = array type data is not smoothed, the default is 0.
For specific data structure, please refer to HQChart tutorial 30-K-line chart how to connect third party data 25-indicator script custom variables
Custom function implementation
If the custom function has a calculation function, you need to implement the calculation function of the custom function, and you need to set the Invoke callback calculation function.
If Invoke is set to null, the downloaded data will be returned directly.
Function format: function(obj)
this.Create=function() //创建图形
{
.............
JSComplier.AddFunction({
Name:"BUYSTOCK", Description:"用户买入", IsDownload:true,
Invoke:(obj)=>this.BUYSTOCK(obj)
})
..............
this.Option.NetworkFilter=function(data, callback) {
self.NetworkFilter(data, callback); }; //绑定网络协议回调
this.Chart.SetOption(this.Option); //设置K线配置
........................
}
this.BUYSTOCK=function(obj)
{
console.log('[KLineChart::BUYSTOCK] obj', obj);
return {
Out:10 };
}
1. Callback function parameter description
Args
Function parameters
DownloadData
The function downloads the data, if IsDownload is set to true, the downloaded data is saved here.
KData
K line data
Name
Function name
Period
cycle
Right
Restoration
Symbol
Stock code
ThrowError
Execute exception callback function
2. Return format
{Out: Returned data}
Single value
Such as return {Out:10 };
Array
Such as: return {Out:[1,20,22…] };
The length of the returned data must be consistent with the length of the K line
Exchange QQ group
If you still have questions, you can add to the exchange QQ group: 950092318
HQChart code address
Address: github.com/jones2000/HQChart
Personal hobbies (photography/modeling)
