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!

What wasn't in the existing system?

• Ability to customise UI of KChartWidget

What this PR solves?

• In KChartWidget we will have to add ChartStyle and ChartColors object so that we can change it dynamically.

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,
    ));
  }

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'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] )

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

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!

The selection based on the user's touch don't work well when the KChart and DepthChart are placed in an app but don't fill the whole screen. The selection also doesn't work properlly when used with the ResponsiveFramework package because of the resizing that is applied to the widgets.

https://user-images.githubusercontent.com/38893955/194149944-1af37c5a-4782-44a8-8d2c-2609063e152a.mp4

This PR aims to solve this bug by making both widgets use the touch's local position instead of the global position.

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.

I'm a developer who is using the 'k_chart' library to make good use of it. I needed some functions, so I download k_chart project, and now, I'm modifying some code to add these. I want to reflect these in the main library. Is there anything I should be careful about before requesting a pull request?

The functions I added are as follows :

1. Adding property infoDialog on KChartWidget : Users can now apply custom UI to infoDialog.
2. Adding properties for Volume Chart bar color
3. Adding Chart bar radius property
4. Adding a property that selects whether or not to display a date

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

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

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.