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52 lines
1.5 KiB
52 lines
1.5 KiB
3 years ago
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import 'package:flutter/material.dart';
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/// 虚线
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class DottedLine extends StatelessWidget {
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///虚线高度（横向为高度，纵向为宽度
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final double height;
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final Color color;
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final Axis direction;
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///虚线宽度
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final double? width;
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///空白与虚线比例
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final double? proportion;
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const DottedLine({
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this.height = 1,
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this.color = Colors.black,
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this.direction = Axis.horizontal,
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this.width,
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this.proportion,
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});
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@override
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Widget build(BuildContext context) {
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return LayoutBuilder(
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builder: (BuildContext context, BoxConstraints constraints) {
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final boxWidth = direction == Axis.horizontal
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? constraints.constrainWidth()
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: constraints.constrainHeight();
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final dashWidth = width ?? 10.0;
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final dashHeight = height;
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final spaceProportion = proportion == null ? 2.0 : (1 + proportion!);
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final dashCount = (boxWidth / (spaceProportion * dashWidth)).floor();
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return Flex(
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children: List.generate(dashCount, (_) {
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return SizedBox(
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width: direction == Axis.horizontal ? dashWidth : dashHeight,
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height: direction == Axis.horizontal ? dashHeight : dashWidth,
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child: DecoratedBox(
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decoration: BoxDecoration(color: color),
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),
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);
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}),
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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direction: direction,
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);
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},
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);
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}
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}
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