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.