Is there a way to align the price labels the right?

我自己的数据结构如下：

看上去似乎和火币的数据一致了，但是我不能显示图表，还有可能是什么原因呢

Invalid argument(s) (fractionDigits): Must not be null

Hi, we would like to check with you if there are plans for allowing the scale of the chart to be adjustable or parameterized? As from what we saw, the chart currently has a minimum and maximum scaling configured which does not allow the chart to be fully zoomed out.

Thank you!

I have some data rendering this:

Can I stretch this data on the whole graph, instead of just showing these few data points at the very left of the chart? Thanks in advance.

Hello, could you help with depth chat please. I have a problem with bids. I'm using the example code but it doesn't look right.
Big thanks.

 void initDepth(List<DepthEntity>? bids, List<DepthEntity>? asks) {
    if (bids == null || asks == null || bids.isEmpty || asks.isEmpty) return;
    listAsk = [];
    listBid = [];
    double amount = 0.0;
    bids.sort((left, right) => left.price.compareTo(right.price));
    bids.reversed.forEach((item) {
      amount += item.vol;
      item.vol = amount;
      listBid.insert(0, item);
    });

    amount = 0.0;
    asks.sort((left, right) => left.price.compareTo(right.price));
    asks.forEach((item) {
      amount += item.vol;
      item.vol = amount;
      listAsk.add(item);
    });

    emit(state.copyWith(
      listAsk: listAsk,
      listBid: listBid,
      status: NewTradeStatus.pending,
    ));
  }

我已经检查了您的flutter库，这是一项了不起的工作。 我需要对现有flutter项目进行一些自定义和添加。 你能做到吗 ？ 我该如何联系您？

使用了DataUtil.calculate()方法，也用了setState方法，但是一开始都不显示kline，请问我的问题出在哪

Please can you add this functionality in the chart?

Is it possible to make sure that the price tags do not fit on the chart, or can the chart itself be shifted to the left of the price tags
Like in video
https://raw.githubusercontent.com/gwhcn/flutter_k_chart/master/example/images/k_chart.2019-09-01%202010_19_56.gif

I want to print all data without scroll.

Seems like pinching works on mobile, but I don't see a way to pinch (zoom) on web/chrome using a mouse.

Flutter offers the null-safety feature, do you have a plan to support it?

Hi, is there exists a way to integrate the Built-in functions from TradingView to this package, i could help :)
https://es.tradingview.com/pine-script-reference/

There is no option to add padding in front of the chart, sometimes the price overlaps with the candle, so at least in beginning there should be an option to add some padding.

Currently it is shown like this

I have fixed this raising the PR too

it should look something like this

I think the i18n infoNames[] instead of infoNamesCN or infoNamesEN in k_chart_widget.dart.

final List infoNamesCN = [
"时间",
"开",
"高",
"低",
"收",
"涨跌额",
"涨跌幅",
"成交额"
];
final List infoNamesEN = [
"Date",
"Open",
"High",
"Low",
"Close",
"Change",
"Change%",
"Amount"
];

Anyway, I've tried to experiment with k_chart for my project.

1. https://github.com/bsjung/k_chart.
2. https://github.com/bsjung/start_examples.

如题：有没有提供方法标记数据？

In the original data set, I scrolled to a certain point, Then I changed the dataset to a smaller set, the chart did not return to the original position, scrolled a bit, it returned to the original position.
So how can kchart be set up when changing data? tks
https://user-images.githubusercontent.com/45956869/167769369-73456815-7237-4811-a656-c5f7e835b612.mp4

要添加更多曲线类可以通过配置嘛？

请问作者，这个插件怎么更新数据啊，有例子吗？

i hope we can tech me or make new feature for adding more chart type. because current only have 2 type candle, line

I've found it's very good for my project.

But, there do not exist for the basic kline/candle chart.
Anyway, I've tried for a simple chart with k_chart.

Thanks.

Benjamin Jung ( [email protected] )

Sorry for my bad english. Please help me how to set right padding for candle chart.

KLineEntity类的change和ratio属性没有赋值,vol用的amount的值.
不知道是不是和这个有关系,请楼主赐教哈~

Your work on this project is fantastic !
You are welcome to PR here https://github.com/Solido/awesome-flutter
So more people can discover it

Thanks !

how to set padding candlestick with VerticalTextAlignment?

Hi, i am trying to verify the data for all technical indicators, but somehow value are not matching. is it possible you can share the calculation of all technical indicators which have been used in library.

应该是对画布进行了缩放导致的，具体表现是，横线宽度是正常的(画笔对应的strokeWidth)，缩小状态下竖线明显细很多，请问下这个问题有解决办法吗

Hi,
Maybe I haven't found, but is there ability to add support of live ticker like in example attached below(yellow price at the right).

我自己的数据结构如下：

看上去似乎和火币的数据一致了，但是我不能显示图表，还有可能是什么原因呢

How to make padding between grid prices and candles?

Like this:

Hi! Can you add some space on the start edge and end egde of the chart like this, a parameter for it would be perfect.

I'm trying to switch from default dark theme to light theme (white background) and I'm trying to change the grid colors.

I found in base_chart_renderer.dart line 16 the gridPaint is a fixed color of 0xff4c5c74.

    ..color = Colors.red;
  Paint gridPaint = Paint()
    ..isAntiAlias = true
    ..filterQuality = FilterQuality.high
    ..strokeWidth = 0.5
    ..color = Color(0xff4c5c74); <-----

Could you extend the capability to allowing custom colors via chart_style.dart please?

Thanks!

Hi Mafanwei,
Need your help with this one. I have looked at the reference and tutorial to make the chart like this for weeks, but I can not find it.
Could you help me to make the chart like this?
There are the details :
Tick chart with Bid and Ask price include Take Profit & Stoploss price.
Difficulty to highlight the target price on the Y-axis.

Need your help.

和火币一样，实时有一条线在绘制

How to change black gradient to yellow?

Hi. Is there a way to both update the candle and build a new one when data changes?

比如说一个15M周期有1000条数据，那么1H只有250条数据，当我把当前15M的蜡烛图拖到最前边，然后切换为1H这时候整个视图就不在屏幕中了，只能滑动一下才会出来1H的图，这个有解决方案么？

At first, I've tried integrating google charts with k_chart. But google charts has complex architecture.
My intentions are an intuitive API for easy use.

Thus, I've re-designed my packages for general line/pie charts with k_chart.
Still, it is an alpha stage, but I will notice if I've completed it.

Benjamin Jung ( [email protected] )

I'm working on a requirement where the product requires that the candlestick chart can be zoomed in and out with a finger around the middle, just like Binance's candlestick chart

Thank you so much

It would be nice to be able to toggle showing/hiding the grid, sometimes it can be more beautiful without the grid.

I have a trouble with the package. Sometimes, it says "Another exception was thrown: NoSuchMethodError: The method '>' was called on null" and it does not print any chart. Is there a way to solve that or to detect which method causes error?

edit: it could be related to this error:
══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
The following NoSuchMethodError was thrown during paint():
The method 'toDouble' was called on null.
Receiver: null
Tried calling: toDouble()

The relevant error-causing widget was:
CustomPaint
CustomPaint:file:///Users/mac13/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/k_chart-0.4.0/lib/k_chart_widget.dart:194:11

无

Please take a look at TradingView chart it's a cool feature to have zoom

We are using your plug-in well and are using your plug-in to operate the actual service. It is evaluated as the best chart library in Plutter. However, there are some problems with the plug-in.

First, the zoom recognition of both fingers is not good, so it is difficult to zoom in and out.

Second, the maximum reduction radius is not specified. Currently, the scope of reduction seems to be small. I hope we can widen the radius of reduction to the maximum.
Thank you.