horizontal zoom not working as individual even when pinchZoomEnabled: false it is zooming proportional when I try to zoom horizontal. But vertical zooming working individual.

运行测试例子，flutter版本用1.5.4，出现错误，如下： Error: The method 'groupBars' isn't defined for the class 'BarChart'. Error: The getter 'localPosition' isn't defined for the class 'PointerDownEvent'. Error: The getter 'localPosition' isn't defined for the class 'TapDownDetails'.等等。 请问能否支持flutter1.5.4版本？

If a chart is inside a PageView, swiping horizontally does not move the chart but instead moving the PageView. Steps to reproduce: 1: Create a chart inside a PageView. This PageView should have more than 2 pages. 2: Pinch the chart to zoom in 3: Drag the chart to move but can't. If you drag vertically then switch to horizontally, the chart can move normally. However, If you try to move it horizontally first, it will not work.

textColor not chaning any legent label colors.

I try too many different method for change legent text color for dark mode. Now legend color is blakc. it can not shown in dark mode.

Regards

Hello everyone , I now create line chart. sorry that I am not strong English. I have some problem which I don't know why my console call "TextPainter.paint called when text geometry was not yet calculated." while i was tapping the chart ,the marker view didn't show also. Does anyone know what to do for fixing? This is my Code.

class CreateTest{

CreateTest(); Widget returnLineChart() { var desc = Description()..enabled = false; var dataPoint = List(); List dataSets = List(); dataPoint.add(Entry(x: 1, y: 2)); dataPoint.add(Entry(x: 2, y: 3)); dataPoint.add(Entry(x: 3, y: 4)); dataPoint.add(Entry(x: 4, y: 5)); dataPoint.add(Entry(x: 5, y: 6)); dataPoint.add(Entry(x: 6, y: 7)); dataPoint.add(Entry(x: 7, y: 8)); dataPoint.add(Entry(x: 8, y: 9)); dataPoint.add(Entry(x: 9, y: 1)); LineDataSet set1; set1 = LineDataSet(dataPoint, "DataSet 1"); set1.setDrawIcons(false); set1.enableDashedLine(10, 5, 0); set1.setColor1(ColorUtils.BLACK); set1.setCircleColor(ColorUtils.BLACK); set1.setHighLightColor(ColorUtils.PURPLE); set1.setLineWidth(1); set1.setCircleRadius(3); set1.setDrawCircleHole(false); set1.setFormLineWidth(1); set1.setFormLineDashEffect(DashPathEffect(10, 5, 0)); set1.setFormSize(15); set1.setValueTextSize(9); set1.enableDashedHighlightLine(10, 5, 0); set1.setDrawFilled(true); set1.setFillColor(ColorUtils.FADE_RED_END); dataSets.add(set1); var controller = LineChartController( axisLeftSettingFunction: (axisLeft, controller) { axisLeft ..drawLimitLineBehindData = true ..enableGridDashedLine(10, 10, 0) ..enableAxisLineDashedLine(5, 5, 0) ..setAxisMaximum(10) ..setAxisMinimum(1); }, axisRightSettingFunction: (axisRight, controller) { axisRight.enabled = (false); }, legendSettingFunction: (legend, controller) { legend.shape = (LegendForm.LINE); }, xAxisSettingFunction: (xAxis, controller) { xAxis ..drawLimitLineBehindData = true ..enableAxisLineDashedLine(5, 5, 0) ..enableGridDashedLine(10, 10, 0); }, drawGridBackground: false, backgroundColor: ColorUtils.WHITE, dragXEnabled: true, dragYEnabled: true, scaleXEnabled: true, scaleYEnabled: true, pinchZoomEnabled: true, description: desc); controller.setViewPortOffsets(16, 16, 16, 16); controller.data = LineData.fromList(dataSets); return LineChart(controller); }

}

i create to custom autoScale for combind follow Candle data

https://streamable.com/wfqkw

  @override
  void onMoveUpdate(double x, double y) {
    double xmin=controller.getValuesByTouchPoint(controller.viewPortHandler.contentLeft(),controller.viewPortHandler.contentBottom(), AxisDependency.RIGHT).x;
    double xmax=controller.getValuesByTouchPoint(controller.viewPortHandler.contentRight(),controller.viewPortHandler.contentBottom(), AxisDependency.RIGHT).x;

    double ymin=controller.getValuesByTouchPoint(controller.viewPortHandler.contentRight(),controller.viewPortHandler.contentBottom(), AxisDependency.RIGHT).y;
    double ymax=controller.getValuesByTouchPoint(controller.viewPortHandler.contentRight(),controller.viewPortHandler.contentTop(), AxisDependency.RIGHT).y;
    double candle_y_max=0;
    double candle_y_min=double.maxFinite;

    for(int i=xmin.toInt();i<xmax;i++){
      if(i>=0 && i< entries.length){
        if(candle_y_min>entries[i].shadowLow){
          candle_y_min=entries[i].shadowLow;
        }
        if(candle_y_max<entries[i].shadowHigh){
          candle_y_max=entries[i].shadowHigh;
        }
      }

    }
    double space=0.20;
    controller.moveViewTo(xmin,(candle_y_min+((ymax-ymin)/2))-space, AxisDependency.RIGHT);
    controller.setVisibleYRange(0.0,(candle_y_max-candle_y_min)+(space),AxisDependency.RIGHT);
    
  }

Please consider adding onLongPressStart, onLongPressMoveUpdate, and onLongPressEnd events to OnTouchEventListener.

Because I want to implement like this: On simple drag => move the chart On long press drag => move the highlight marker

• Pie Chart Center Text fontFamily and fontWeight were not working, fixed the bug, now below code should set the font PieChartController(centerTextTypeface: TypeFace(fontFamily: 'Roboto', fontWeight: FontWeight.bold));

• Pie Chart Center Text added new options to customize centerTextColor and centerTextSize, current version was always painting text in Black with 12 font size. After this change if values are provided using PieChartController these will be used, if these are null then current implementation will work with backward compatibility PieChartController(centerText: '2020',centerTextColor: AppColors.blue, centerTextSize: 20);

@SunPointed If you like the changes, feel free to pull

    //not work
    controller.moveViewToX(data.getEntryCount().toDouble());

    //ok
    controller.moveViewToAnimated(data.getEntryCount().toDouble(), 0.0, AxisDependency.LEFT, 1);

https://github.com/typ0520/mp_flutter_chart_demo

I want to combine 2 Horizontal Bar Chart and Scatter Plot Chart. Although I use Stack to overlap together, 2 charts are put on one background but don't have transparent field => Chart 1 cannot be displayed. I set drawGridBackground: false but it doesn't work. Please give me a solution, thank you.

I am using linechart in one of my application. I want to show multiple gradient colors. I have used setGradientColors() as follow;

LineDataSet set1 = LineDataSet(vals, Strings.emptyString); set1.setColor1(Colors.black); set1.setDrawValues(false); set1.setDrawFilled(true); List<GradientColor> gradientColors = []; gradientColors.add(GradientColor(Colors.red, Colors.green)); gradientColors.add(GradientColor(Colors.yellow, Colors.blue)); gradientColors.add(GradientColor(Colors.amber, Colors.pink)); gradientColors.add(GradientColor(Colors.purple, Colors.cyan)); gradientColors.add(GradientColor(Colors.red, Colors.yellow)); set1.setGradientColors(gradientColors); set1.setLineWidth(1); set1.setDrawCircles(false);

But its not working and linechart shows only one color as following;

@SunPointed So, pls help to find proper solution. Thanks in advance.

Try correcting the name to the name of an existing method, or defining a method named 'then'. .then((value) { ^^^^ /C:/flutter/.pub-cache/hosted/pub.dartlang.org/mp_chart-0.3.1/lib/mp/core/utils/painter_utils.dart:15:34: Error: The getter 'text' isn't defined for the class 'InlineSpan'.

• 'InlineSpan' is from 'package:flutter/src/painting/inline_span.dart' ('/C:/flutter/packages/flutter/lib/src/painting/inline_span.dart'). Try correcting the name to the name of an existing getter, or defining a getter or field named 'text'. var preText = painter.text.text;

As this lib has no update since 30th October 2020 : https://pub.dev/packages/mp_chart

So, is there any update after this ?

because , in our current running project its conflicting with other libs.

Please provide updates.

Q1：../lib/mp/chart/chart.dart:51:12: Error: The method 'then' isn't defined for the class 'FutureOr<dynamic>'. Try correcting the name to the name of an existing method, or defining a method named 'then'. .then((value) {

A1:change ‘../lib/mp/chart/chart.dart:51’ before： ImageGallerySaver.saveImage(Uint8List.fromList(imgFile.readAsBytesSync())) .then((value) { imgFile.delete(); }); after： var result = ImageGallerySaver.saveImage(Uint8List.fromList(imgFile.readAsBytesSync())); if(result is Future<dynamic>){ result.then((value) => imgFile.delete()); }

Q2:`../lib/mp/core/utils/painter_utils.dart:15:34: Error: The getter 'text' isn't defined for the class 'InlineSpan'.

• 'InlineSpan' is from 'package:flutter/src/painting/inline_span.dart' ('/E:/flutter/packages/flutter/lib/src/painting/inline_span.dart'). Try correcting the name to the name of an existing getter, or defining a getter or field named 'text'. var preText = painter.text.text;A2:change '../lib/mp/core/utils/painter_utils.dart:15' before:var preText = painter.text.text;after:var preText = (painter.text as TextSpan).text;`

If you have other questions, you can try to leave me a message