k_chart

Maybe this is the best k chart in Flutter.Support drag,scale,long press,fling.And easy to use.

display

image

gif

demo

Getting Started

Install

dependencies:
  k_chart: ^0.7.1

or use latest：

k_chart:
    git:
      url: https://github.com/mafanwei/k_chart

Usage

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，

Donate

Buy a cup of coffee for the author.

Thanks

gwhcn/flutter_k_chart

Other

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.