SfCartesianChart - Inconsistent Data Label Position in Bar Chart

[alunparanggi]

Bug description

In some cases, the data labels in the bar chart either disappear completely or shift slightly, while in other cases, they appear correctly.

I'm not sure what is causing this issue—perhaps the Transform widget or some other factor. I have tried avoiding a builder and instead using the angle: 90 parameter in DataLabelSettings, but the issue still occurs.

Steps to reproduce

There are no specific steps to reproduce this behavior.

Code sample

Code sample

@override
  Widget build(BuildContext context) {
    return SizedBox(
      child: SfCartesianChart(
          tooltipBehavior: TooltipBehavior(
              enable: true,
              color: Colors.blue,
              builder: (dynamic data, dynamic point, dynamic series,
                  int pointIndex, int seriesIndex) {
                return _tooltip(data: data, isIntake: seriesIndex == 0);
              }),
          primaryXAxis: CategoryAxis(),
          series: <CartesianSeries<CalorieHistory, String>>[
            // calorie intake
            ColumnSeries<CalorieHistory, String>(
              dataSource: caloriesData7Days,
              color: barColor,
              xValueMapper: (CalorieHistory data, _) =>
                  DateHelper.getDayOfWeek(data.date).substring(0, 3),
              yValueMapper: (CalorieHistory data, _) => data.caloriesIntake,
              dataLabelSettings: DataLabelSettings(
                  isVisible: true,
                  offset: Offset(0, -42),
                  labelIntersectAction: LabelIntersectAction.shift,
                  builder: (dynamic data, dynamic point, dynamic series,
                      int pointIndex, int seriesIndex) {
                    return Transform.rotate(
                      angle: 90 * 3.14159265359 / 180, // Rotasi 90 derajat
                      child: Text(
                        '${data.caloriesIntake.toStringAsFixed(2)} kcal',
                        style: AppStyle.regular8r.copyWith(color: Colors.white),
                      ),
                    );
                  }),
            ),
            // calorie burnt
            ColumnSeries<CalorieHistory, String>(
              dataSource: caloriesData7Days,
              color: Colors.deepOrange,
              xValueMapper: (CalorieHistory data, _) =>
                  DateHelper.getDayOfWeek(data.date).substring(0, 3),
              yValueMapper: (CalorieHistory data, _) => data.caloriesBurnt,
              dataLabelSettings: DataLabelSettings(
                  isVisible: true,
                  offset: Offset(0, -42),
                  labelIntersectAction: LabelIntersectAction.none,
                  builder: (dynamic data, dynamic point, dynamic series,
                      int pointIndex, int seriesIndex) {
                    return Transform.rotate(
                      angle: 90 * 3.14159265359 / 180,
                      child: Text(
                        '${data.caloriesBurnt.toStringAsFixed(2)} kcal',
                        style: AppStyle.regular8r.copyWith(color: Colors.black),
                      ),
                    );
                  }),
            ),
          ]),
    );
  }

// model & data
class CalorieHistory {
  DateTime date;
  double caloriesIntake;
  double caloriesBurnt;
  String notes;
  String burntNotes;

  CalorieHistory({
    required this.date,
    this.caloriesBurnt = 0,
    this.caloriesIntake = 0,
    this.notes = '',
    this.burntNotes = '',
  });
}

List<CalorieHistory> caloriesData7Days = [
  CalorieHistory(
    date: DateTime.parse("2025-03-17 00:00:00"),
    caloriesIntake: 1100,
    caloriesBurnt: 1242.1,
    notes: "",
    burntNotes: "",
  ),
  CalorieHistory(
    date: DateTime.parse("2025-03-18 00:00:00"),
    caloriesIntake: 553,
    caloriesBurnt: 1132.6083,
    notes: "",
    burntNotes: "",
  ),
  CalorieHistory(
    date: DateTime.parse("2025-03-19 00:00:00"),
    caloriesIntake: 256,
    caloriesBurnt: 804.37,
    notes: "",
    burntNotes: "",
  ),
  CalorieHistory(
    date: DateTime.parse("2025-03-20 00:00:00"),
    caloriesIntake: 767,
    caloriesBurnt: 321.85,
    notes: "",
    burntNotes: "",
  ),
  CalorieHistory(
    date: DateTime.parse("2025-03-21 00:00:00"),
    caloriesIntake: 0,
    caloriesBurnt: 0,
    notes: "",
    burntNotes: "",
  ),
  CalorieHistory(
    date: DateTime.parse("2025-03-22 00:00:00"),
    caloriesIntake: 0,
    caloriesBurnt: 1827.47,
    notes: "",
    burntNotes: "",
  ),
];

Screenshots or Video

Screenshots / Video demonstration

labelIntersectAction: LabelIntersectAction.none

when labelIntersectAction: LabelIntersectAction.shift some labels are completely gone

Stack Traces

Stack Traces

no stack trace is available

On which target platforms have you observed this bug?

iOS

Flutter Doctor output

Doctor output

[!] Flutter (Channel stable, 3.29.2, on macOS 13.7.3 22H417 darwin-x64, locale en-US) [3.6s]
    • Flutter version 3.29.2 on channel stable at /Users/alunparanggi/fvm/versions/3.29.2
    ! Warning: `dart` on your path resolves to /usr/local/Cellar/dart/2.17.3/libexec/bin/dart, which is not inside your current Flutter SDK checkout at /Users/alunparanggi/fvm/versions/3.29.2. Consider adding /Users/alunparanggi/fvm/versions/3.29.2/bin to the front of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision c236373904 (8 days ago), 2025-03-13 16:17:06 -0400
    • Engine revision 18b71d647a
    • Dart version 3.7.2
    • DevTools version 2.42.3
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0) [8.5s]
    • Android SDK at /Users/alunparanggi/Library/Android/sdk/
    • Platform android-35, build-tools 34.0.0
    • ANDROID_HOME = /Users/alunparanggi/Library/Android/sdk/
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      This is the JDK bundled with the latest Android Studio installation on this machine.
      To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)
    • All Android licenses accepted.

[!] Xcode - develop for iOS and macOS (Xcode 15.1) [6.6s]
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15C65
    ! CocoaPods 1.15.2 out of date (1.16.2 is recommended).
        CocoaPods is a package manager for iOS or macOS platform code.
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[✓] Chrome - develop for the web [37ms]
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[✓] Android Studio (version 2023.1) [35ms]
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    • Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)

[✓] VS Code (version 1.98.2) [32ms]
    • VS Code at /Applications/Visual Studio Code.app/Contents
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[✓] Connected device (2 available) [18.0s]
    • iPhone 15 (mobile) • CD0DF359-07AA-4D10-BC02-17B25EE64F92 • ios            • com.apple.CoreSimulator.SimRuntime.iOS-17-2 (simulator)
    • Chrome (web)       • chrome                               • web-javascript • Google Chrome 134.0.6998.119
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      The device must be opted into Developer Mode to connect wirelessly. (code -27)

[✓] Network resources [644ms]
    • All expected network resources are available.

! Doctor found issues in 2 categories.