DateRangePicker: adding cellBuilder makes selected date square

[joachimbulow]

Bug description

version: ^27.2.5

This may not be a bug, but as soon as i provide a custom cellBuilder my selected date cell is enforced with square properties on the overlay.

Not sure if there is a way to override this?
Pretty odd behaviour imo.

Tried looking into selectionShape, adding hard properties to the cell builder function, to no avail

Steps to reproduce

Step 1: Add a default SfDateRangePicker to your app.
Step 2: Add a cellBuilder returning a circular container with the date text inside.
Step 3: Select a date. The Overlayed color is square instead of circle.

Code sample

Code sample

[Add your code here]

Screenshots or Video

Screenshots / Video demonstration

[Upload media here]

Stack Traces

Stack Traces

[Add the Stack Traces here]

On which target platforms have you observed this bug?

iOS

Flutter Doctor output

Doctor output

[Add your output here]

[joachimbulow]

You also conveniently leave that out from e.g.

https://support.syncfusion.com/kb/article/10750/how-to-customize-the-special-dates-using-builder-in-the-flutter-date-range-picker?isInternalRefresh=False

(https://github.com/SyncfusionExamples/customize-special-dates-using-builder-flutter-date-picker/blob/main/lib/main.dart)

Am i trippin?
Noone wants a square selection 😭

[joachimbulow]

Also seems like selectionColor is broken. At least i could NOT get it to work in single mode.

Instead i had to resort to overriding selectionColor getter from the theme.

// Having to create a custom theme just to color a selection is a bit sad, i must admit...
//
// This related to my original question, because my workaround will be to color the selection transparent when necessary :/
//
class CustomDateRangePickerThemeData extends SfDateRangePickerThemeData {
  final BuildContext context;

  CustomDateRangePickerThemeData(this.context);

  @override
  Color? get selectionColor => Colors.red;
}