getHighlightColor method Null safety

Color getHighlightColor(
  1. MaterialButton button
)

The color of the overlay that appears when the button is pressed.

Returns the button's MaterialButton.highlightColor if it is non-null. Otherwise the highlight color depends on getTextTheme:

Implementation

Color getHighlightColor(MaterialButton button) {
  if (button.highlightColor != null)
    return button.highlightColor!;

  switch (getTextTheme(button)) {
    case ButtonTextTheme.normal:
    case ButtonTextTheme.accent:
      return _highlightColor ?? getTextColor(button).withOpacity(0.16);
    case ButtonTextTheme.primary:
      return Colors.transparent;
  }
}