Dotted Border

A flutter package to easily add dotted borders around widgets.

Installing

To use this package, add dotted_border as a dependency in your pubspec.yaml file.

Usage

Wrap DottedBorder widget around the child widget

DottedBorder(
    color: Colors.black,
    strokeWidth: 1,
    child: FlutterLogo(size: 148),
)

BorderTypes

This package supports the following border types at the moment

• RectBorder
• RRectBorder
• CircleBorder
• OvalBorder

Example

return DottedBorder(
  borderType: BorderType.RRect,
  radius: Radius.circular(12),
  padding: EdgeInsets.all(6),
  child: ClipRRect(
    borderRadius: BorderRadius.all(Radius.circular(12)),
    child: Container(
      height: 200,
      width: 120,
      color: Colors.amber,
    ),
  ),
);

Dash Pattern

Now you can also specify the Dash Sequence by passing in an Array of Doubles

Example

DottedBorder(
    dashPattern: [6, 3, 2, 3], 
    child: ...
);

The above code block will render a dashed border with the following pattern:

• 6 pixel wide dash
• 3 pixel wide space
• 2 pixel wide dash
• 3 pixel wide space

Custom Path Border

You can also specify any path as the customPath property when initializing the DottedBorderWidget, and it will draw it for you using the provided dash pattern.

Example

Path customPath = Path()
  ..moveTo(20, 20)
  ..lineTo(50, 100)
  ..lineTo(20, 200)
  ..lineTo(100, 100)
  ..lineTo(20, 20);

return DottedBorder(
  customPath: (size) => customPath, // PathBuilder
  color: Colors.indigo,
  dashPattern: [8, 4],
  strokeWidth: 2,
  child: Container(
    height: 220,
    width: 120,
    color: Colors.green.withAlpha(20),
  ),
);

Stroke Cap

PR submitted by Tarekk Mohamed Abdalla

You can set a StrokeCap to the border line endings. It can take three values

• StrokeCap.Round
• StrokeCap.Square
• StrokeCap.Butt

Output

Credits

• Flutter Path Drawing - Dan Field