buttonPadding property

Padding on TextButton, ElevatedButton and OutlinedButton.

Rounded buttons may need a bit more horizontal padding to accommodate for the rounding.

If undefined then defaults to each buttons un-themed textScale based padding static function ButtonStyleButton.scaledPadding where Elevated, Filled and Outline button use padding:

• textScaleFactor <= 1 - horizontal(16)
• 1 < textScaleFactor <= 2 - lerp(horizontal(16), horizontal(8))
• 2 < textScaleFactor <= 3 - lerp(horizontal(8), horizontal(4))
• 3 < textScaleFactor - horizontal(4)

And TextButton uses padding:

• textScaleFactor <= 1 - all(8)
• 1 < textScaleFactor <= 2 - lerp(all(8), horizontal(8))
• 2 < textScaleFactor <= 3 - lerp(horizontal(8), horizontal(4))
• 3 < textScaleFactor - horizontal(4)

This default is the same in both Material 2 and Material 3 theme mode.