Button constructor

const Button({ Key? key, Widget? icon, String? text, Widget? child, String? tooltip, TextStyle? textStyle, Color? foregroundColor, Color? backgroundColor, Color? disabledBackgroundColor, EdgeInsets? padding, BorderRadius? borderRadius, required VoidCallback? onPressed, VoidCallback? onLongPress, })

One of icon or text must be non-null

Implementation

const Button({
  super.key,
  this.icon,
  this.text,
  this.child,
  this.tooltip,
  this.textStyle,
  this.foregroundColor,
  this.backgroundColor,
  this.disabledBackgroundColor,
  this.padding,
  this.borderRadius,
  required this.onPressed,
  this.onLongPress,
}) : assert(icon != null || text != null || child != null);