67 lines
1.8 KiB
Dart
67 lines
1.8 KiB
Dart
import 'dart:ui';
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import 'package:flutter/material.dart';
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class OutlinedText extends StatelessWidget {
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final List<TextSpan> textSpans;
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final double outlineWidth;
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final Color outlineColor;
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final double outlineBlurSigma;
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final TextAlign? textAlign;
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static const widgetSpanAlignment = PlaceholderAlignment.middle;
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const OutlinedText({
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Key? key,
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required this.textSpans,
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double? outlineWidth,
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Color? outlineColor,
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double? outlineBlurSigma,
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this.textAlign,
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}) : outlineWidth = outlineWidth ?? 1,
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outlineColor = outlineColor ?? Colors.black,
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outlineBlurSigma = outlineBlurSigma ?? 0,
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super(key: key);
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@override
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Widget build(BuildContext context) {
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return Stack(
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children: [
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if (outlineWidth > 0)
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ImageFiltered(
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imageFilter: outlineBlurSigma > 0
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? ImageFilter.blur(
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sigmaX: outlineBlurSigma,
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sigmaY: outlineBlurSigma,
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)
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: ImageFilter.matrix(
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Matrix4.identity().storage,
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),
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child: Text.rich(
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TextSpan(
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children: textSpans.map(_toStrokeSpan).toList(),
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),
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textAlign: textAlign,
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),
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),
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Text.rich(
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TextSpan(
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children: textSpans,
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),
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textAlign: textAlign,
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),
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],
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);
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}
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TextSpan _toStrokeSpan(TextSpan span) => TextSpan(
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text: span.text,
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children: span.children,
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style: (span.style ?? const TextStyle()).copyWith(
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foreground: Paint()
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..style = PaintingStyle.stroke
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..strokeWidth = outlineWidth
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..color = outlineColor,
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),
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);
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}
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