FlatButton constructor

const FlatButton({Key key, @required VoidCallback onPressed, ValueChanged<bool> onHighlightChanged, ButtonTextTheme textTheme, Color textColor, Color disabledTextColor, Color color, Color disabledColor, Color highlightColor, Color splashColor, Brightness colorBrightness, EdgeInsetsGeometry padding, ShapeBorder shape, Clip clipBehavior: Clip.none, MaterialTapTargetSize materialTapTargetSize, @required Widget child })

Create a simple text button.

Implementation 

const FlatButton({
  Key key,
  @required VoidCallback onPressed,
  ValueChanged<bool> onHighlightChanged,
  ButtonTextTheme textTheme,
  Color textColor,
  Color disabledTextColor,
  Color color,
  Color disabledColor,
  Color highlightColor,
  Color splashColor,
  Brightness colorBrightness,
  EdgeInsetsGeometry padding,
  ShapeBorder shape,
  Clip clipBehavior = Clip.none,
  MaterialTapTargetSize materialTapTargetSize,
  @required Widget child,
}) : super(
       key: key,
       onPressed: onPressed,
       onHighlightChanged: onHighlightChanged,
       textTheme: textTheme,
       textColor: textColor,
       disabledTextColor: disabledTextColor,
       color: color,
       disabledColor: disabledColor,
       highlightColor: highlightColor,
       splashColor: splashColor,
       colorBrightness: colorBrightness,
       padding: padding,
       shape: shape,
       clipBehavior: clipBehavior,
       materialTapTargetSize: materialTapTargetSize,
       child: child,
    );