buildInputDecoration method

InputDecoration buildInputDecoration(BuildContext context, Set<WidgetState> states, { bool expands = false, Widget? beforePostWidget, Widget? beforePreWidget, String? label, String? placeholder, String? tag, String? helperText, List<String>? errors, bool isRequired = false, VoidCallback? onClear, Widget? infoIcon, FloatingLabelAlignment? labelAlignment, })

Implementation

InputDecoration buildInputDecoration(
  BuildContext context,
  Set<WidgetState> states, {
  bool expands = false,
  Widget? beforePostWidget,
  Widget? beforePreWidget,
  String? label,
  String? placeholder,
  String? tag,
  String? helperText,
  List<String>? errors,
  bool isRequired = false,
  VoidCallback? onClear,
  Widget? infoIcon,
  FloatingLabelAlignment? labelAlignment,
}) {
  final inputBorder = buildInputBorder(states);

  final isFilled = decorationType == TInputDecorationType.filled;

  final fillColor = resolveBackgroundColor(context, states);

  final hasLabel = (label != null && label.isNotEmpty) || (tag != null && tag.isNotEmpty);
  final showFloatingLabel = labelPosition != TLabelPosition.aboveField && hasLabel;

  final basePadding = padding ?? size.padding;
  final effectivePadding = decorationType == TInputDecorationType.underline
      ? basePadding.copyWith(top: 0, bottom: basePadding.bottom)
      : showFloatingLabel && labelPosition == TLabelPosition.inlineFloating
          ? basePadding.copyWith(top: basePadding.top / 1.2, bottom: basePadding.bottom / 1.2)
          : basePadding;

  return InputDecoration(
    border: inputBorder,
    enabledBorder: inputBorder,
    focusedErrorBorder: inputBorder,
    disabledBorder: inputBorder,
    focusedBorder: inputBorder,
    errorBorder: inputBorder,
    contentPadding: effectivePadding,
    constraints: BoxConstraints(
      minHeight: fieldHeight,
      maxHeight: expands ? double.infinity : fieldHeight,
    ),
    label: showFloatingLabel ? labelBuilder.resolve(states)(label, tag, isRequired, null) : null,
    labelStyle: showFloatingLabel ? labelStyle.resolve(states) : null,
    floatingLabelStyle: showFloatingLabel ? floatingLabelStyle.resolve(states) : null,
    floatingLabelAlignment: showFloatingLabel ? labelAlignment : null,
    floatingLabelBehavior: showFloatingLabel
        ? switch (labelPosition) {
            TLabelPosition.aboveField => FloatingLabelBehavior.never,
            TLabelPosition.floating || TLabelPosition.inlineFloating => FloatingLabelBehavior.auto,
          }
        : FloatingLabelBehavior.never,
    isDense: true,
    visualDensity: VisualDensity.compact,
    hintText: placeholder,
    hintStyle: hintStyle.resolve(states),
    prefixIconConstraints: BoxConstraints(minHeight: fieldHeight - effectivePadding.vertical, minWidth: effectivePadding.left),
    prefixIcon: _buildPreWidget(beforePreWidget),
    suffixIconConstraints: BoxConstraints(minHeight: fieldHeight - effectivePadding.vertical, minWidth: effectivePadding.right),
    suffixIcon: _buildPostWidget(
      beforePostWidget: beforePostWidget,
      onClear: onClear,
      infoIcon: labelPosition == TLabelPosition.floating || labelPosition == TLabelPosition.inlineFloating ? infoIcon : null,
    ),
    filled: isFilled,
    fillColor: fillColor,
    focusColor: fillColor,
    hoverColor: fillColor,
  );
}