InputDecoration constructor

const InputDecoration({Widget icon, String labelText, TextStyle labelStyle, String helperText, TextStyle helperStyle, String hintText, TextStyle hintStyle, String errorText, TextStyle errorStyle, int errorMaxLines, bool hasFloatingPlaceholder: true, bool isDense, EdgeInsetsGeometry contentPadding, Widget prefixIcon, Widget prefix, String prefixText, TextStyle prefixStyle, Widget suffixIcon, Widget suffix, String suffixText, TextStyle suffixStyle, String counterText, TextStyle counterStyle, bool filled, Color fillColor, InputBorder errorBorder, InputBorder focusedBorder, InputBorder focusedErrorBorder, InputBorder disabledBorder, InputBorder enabledBorder, InputBorder border, bool enabled: true, String semanticCounterText })

Creates a bundle of the border, labels, icons, and styles used to decorate a Material Design text field.

Unless specified by ThemeData.inputDecorationTheme, InputDecorator defaults isDense to true, and filled to false, and maxLines to 1. The default border is an instance of UnderlineInputBorder. If border is InputBorder.none then no border is drawn.

The enabled argument must not be null.

Only prefix or prefixText can be specified. The same applies for suffix and suffixText.

Implementation 

const InputDecoration({
  this.icon,
  this.labelText,
  this.labelStyle,
  this.helperText,
  this.helperStyle,
  this.hintText,
  this.hintStyle,
  this.errorText,
  this.errorStyle,
  this.errorMaxLines,
  this.hasFloatingPlaceholder = true,
  this.isDense,
  this.contentPadding,
  this.prefixIcon,
  this.prefix,
  this.prefixText,
  this.prefixStyle,
  this.suffixIcon,
  this.suffix,
  this.suffixText,
  this.suffixStyle,
  this.counterText,
  this.counterStyle,
  this.filled,
  this.fillColor,
  this.errorBorder,
  this.focusedBorder,
  this.focusedErrorBorder,
  this.disabledBorder,
  this.enabledBorder,
  this.border,
  this.enabled = true,
  this.semanticCounterText,
}) : assert(enabled != null),
     assert(!(prefix != null && prefixText != null), 'Declaring both prefix and prefixText is not allowed'),
     assert(!(suffix != null && suffixText != null), 'Declaring both suffix and suffixText is not allowed'),
     isCollapsed = false;