Maybe this is the best k chart in Flutter.Support drag,scale,long press,fling.And easy to use.
dependencies:
k_chart: ^0.7.1
or use latest:
k_chart:
git:
url: https://github.com/mafanwei/k_chart
When you change the data, you must call this:
DataUtil.calculate(datas); //This function has some optional parameters: n is BOLL N-day closing price. k is BOLL param.
use k line chart:
Container( height: 450, width: double.infinity, child: KChartWidget( chartStyle, // Required for styling purposes chartColors,// Required for styling purposes datas,// Required,Data must be an ordered list,(history=>now) isLine: isLine,// Decide whether it is k-line or time-sharing mainState: _mainState,// Decide what the main view shows secondaryState: _secondaryState,// Decide what the sub view shows fixedLength: 2,// Displayed decimal precision timeFormat: TimeFormat.YEAR_MONTH_DAY, onLoadMore: (bool a) {},// Called when the data scrolls to the end. When a is true, it means the user is pulled to the end of the right side of the data. When a // is false, it means the user is pulled to the end of the left side of the data. maDayList: [5,10,20],// Display of MA,This parameter must be equal to DataUtil.calculate‘s maDayList translations: kChartTranslations,// Graphic language volHidden: false,// hide volume showNowPrice: true,// show now price isOnDrag: (isDrag){},// true is on Drag.Don't load data while Draging. onSecondaryTap:(){},// on secondary rect taped. isTrendLine: false, // You can use Trendline by long-pressing and moving your finger after setting true to isTrendLine property. xFrontPadding: 100 // padding in front ), ),
use depth chart:
DepthChart(_bids, _asks, chartColors) //Note: Datas must be an ordered list,
Buy a cup of coffee for the author.
Maybe there are some bugs in this k chart,or you want new indicators,you can create a pull request.I will happy to accept it and I hope we can make it better.