build method

@override Widget build(BuildContext context)

Describes the part of the UI represented by this widget.

Implementation

@override
Widget build(BuildContext context) {
  final theme = ThemeScope.of(context);
  final accent = _accentFor(theme);

  final markerStyle = _copyStyle(theme.labelMedium)
    ..foreground(accent)
    ..bold();
  final titleStyle = _copyStyle(theme.titleSmall)
    ..foreground(theme.onSurface)
    ..bold();
  final bodyStyle = _copyStyle(theme.bodyMedium)..foreground(theme.onSurface);

  final header = title == null ? null : Text(title!, style: titleStyle);
  final content = child ?? Text(message ?? '', style: bodyStyle);

  final body = Column(
    gap: (header != null && (message != null || child != null)) ? 1 : 0,
    children: [if (header != null) header, content],
  );

  final row = Row(
    gap: 1,
    crossAxisAlignment: CrossAxisAlignment.start,
    children: [
      Text(_markerFor(), style: markerStyle),
      Expanded(child: body),
      if (actions.isNotEmpty) Row(gap: 1, children: actions),
    ],
  );

  return Frame(
    padding: padding ?? const EdgeInsets.all(1),
    margin: margin,
    background: theme.surface,
    border: border ?? Border.normal,
    borderColor: accent,
    child: row,
  );
}