Flag to position labels at the beginning of each interval #2369
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…ould be placed dynamically or at the beginning of each interval
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As an alternative to the dynamic placing of labels for DateTimeIntervalType.months and DateTimeIntervalType.years, the flag labelsAtBeginning can be set to true for DateTimeAxis to force the label position to the beginning of each month or year, respectively. Lower interval types already place the labels at the beginning of the corresponding intervals, so they are not affected by the flag. Similarly, auto is not based on any interval, so there's no effect as well.
See the difference in the video:
labelsAtBeginning.mp4
The upper charts show the updated behavior with the flag set while the lower charts show the legacy behavior without the flag set. The example is available here: https://github.com/DrNiels/flutter-widgets/blob/example/fixed-axis-ticks/packages/syncfusion_flutter_charts/example/lib/main.dart
I tried my best, but I'm still foreign to your personal coding practices, so feel free to remark anything and I will adjust the code accordingly.
In response to the feature request: https://www.syncfusion.com/feedback/36499/instead-of-recalculating-the-axis-labels-keep-them-stable-on-panning
And the issue: #2130