一统天下 flutter - 图形: 边框
一统天下 flutter - 图形: 边框
示例如下:
lib\shape\border.dart
/*
* 边框
*
* 以下边框均继承自 ShapeBorder
* 1、BeveledRectangleBorder - 边可倾斜的矩形框(可以指定边框的大小、颜色、半径)
* 2、Border - 边框(允许分别设置每个边的大小和颜色)
* 3、BorderDirectional - 同 Border,只不过因为文字方向的原因,没有 left 和 right 了,改为 start 和 end 了
* 4、CircleBorder - 圆形边框
* 5、RoundedRectangleBorder - 圆角矩形边框
* 6、ContinuousRectangleBorder - 圆角矩形边框
* 注:ContinuousRectangleBorder 的边框一半在主图形内一半在主图形外,其他类型的边框均是在主图形内
* 7、StadiumBorder - 跑道边框(左右是圆弧,上下是直线)
* 8、OutlineInputBorder - 用于输入框的边框
* 9、UnderlineInputBorder - 用于输入框的下划线
*
* 注:
* BorderSide - 用于定义边框的大小和颜色
* BorderRadius - 用于定义边框圆角的半径
*/
import 'package:flutter/material.dart';
class BorderDemo extends StatelessWidget {
const BorderDemo({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
const MyBox(
/// BeveledRectangleBorder - 边可倾斜的矩形框
/// side - 边框的大小和颜色,一个 BorderSide 对象
/// borderRadius - 边框圆角的半径,一个 BorderRadius 对象
shape: BeveledRectangleBorder(
/// style - 边框样式
/// BorderStyle.solid - 有边框
/// BorderStyle.none - 无边框
/// strokeAlign - 边框位置
/// BorderSide.strokeAlignInside - 边框在主图形之内
/// BorderSide.strokeAlignOutside - 边框在主图形之外
/// BorderSide.strokeAlignCenter - 边框一半在主图形之内,一半在主图形之外
side: BorderSide(width: 2, color: Colors.green, style: BorderStyle.solid, strokeAlign: BorderSide.strokeAlignInside),
borderRadius: BorderRadius.only(
topLeft: Radius.circular(5),
topRight: Radius.circular(5),
bottomLeft: Radius.circular(10),
bottomRight: Radius.circular(10),
),
),
),
MyBox(
/// BeveledRectangleBorder - 边可倾斜的矩形框(指定边框半径为 0 时就是一个标准矩形框)
shape: BeveledRectangleBorder(
side: const BorderSide(width: 2, color: Colors.green),
borderRadius: BorderRadius.circular(0)
),
),
const MyBox(
/// Border - 边框,允许分别设置每个边的大小和颜色,如果每个边都一样的话就用 Border.all()
/// BorderDirectional - 同 Border,只不过因为文字方向的原因,没有 left 和 right 了,改为 start 和 end 了
shape: Border(
top: BorderSide(width: 5, color: Colors.green),
right: BorderSide(width: 5, color: Colors.blue),
bottom: BorderSide(width: 5, color: Colors.yellow),
/// 无边框,等同于 BorderSide(width: 0.0, style: BorderStyle.none);
left: BorderSide.none,
),
),
const MyBox(
/// CircleBorder - 圆形边框
/// side - 边框的大小和颜色,一个 BorderSide 对象
shape: CircleBorder(
side: BorderSide(width: 5, color: Colors.green)
),
),
MyBox(
/// RoundedRectangleBorder - 圆角矩形边框
/// side - 边框的大小和颜色,一个 BorderSide 对象
/// borderRadius - 边框圆角的半径,一个 BorderRadius 对象
shape: RoundedRectangleBorder(
side: const BorderSide(width: 5, color: Colors.green),
borderRadius: BorderRadius.circular(5)
),
),
MyBox(
/// ContinuousRectangleBorder - 圆角矩形边框
/// side - 边框的大小和颜色,一个 BorderSide 对象
/// borderRadius - 边框圆角的半径,一个 BorderRadius 对象
/// 注:ContinuousRectangleBorder 的边框一半在主图形内一半在主图形外,其他类型的边框均是在主图形内
shape: ContinuousRectangleBorder(
side: const BorderSide(width: 5, color: Colors.green),
borderRadius: BorderRadius.circular(5)
),
),
const MyBox(
/// StadiumBorder - 跑道边框(左右是圆弧,上下是直线)
/// side - 边框的大小和颜色,一个 BorderSide 对象
shape: StadiumBorder(
side: BorderSide(width: 5, color: Colors.green),
),
),
MyBox(
/// OutlineInputBorder - 用于输入框的边框(参见:lib/widget/text/text_field.dart)
/// borderSide - 边框的大小和颜色,一个 BorderSide 对象
/// borderRadius - 边框圆角的半径,一个 BorderRadius 对象
shape: OutlineInputBorder(
borderSide: const BorderSide(width: 5, color: Colors.green),
borderRadius: BorderRadius.circular(6),
),
),
const MyBox(
/// UnderlineInputBorder - 用于输入框的下划线(参见:lib/widget/text/text_field.dart)
/// borderSide - 边框的大小和颜色,一个 BorderSide 对象
shape: UnderlineInputBorder(
borderSide: BorderSide(width: 5, color: Colors.green),
),
),
],
);
}
}
class MyBox extends StatelessWidget {
final ShapeBorder shape;
const MyBox({
Key? key,
required this.shape,
}) : super(key: key);
@override
Widget build(BuildContext context) {
return SizedBox(
width: 200,
height: 20,
child: Material(
shape: shape,
child: Container(color: Colors.red,),
),
);
}
}