Use case

I am designing a DataTable where the DataColumns need a fixed width, which is calculated based on the LayoutBuilder´s maxWidth.
Even though I accounted for horizontalMargin , columnSpacing and all Paddings, the calculation did not add up. Problem was that I provided empty onSort functions as placeholders and that reserved a width of 18 for every DataColumn.

However, the debugging process was rather hard as the docs never mention the sorting arrow reserving the space, even though the function does not return anything and no visible arrow is displayed. Even though the empty space can be identified as a RichText (with DevTools), that did not shed light on where it came from.

Furthermore, it would be useful to know the exact size of the sorting arrow and if it resized based on the device size.

A screenshot is provided to better understand my point.

Proposal

Add above mentioned informations the DataColumn or onSort documentation.

To reiterate, following information would be valueable:

• space is taken for sorting arrow as soon as onSort of DataColumn is not null
• size of onSort arrow

StackOverflow question regarding topic