BorderRenderer class Border Component Rendering

A utility class responsible for rendering borders around rectangular areas in the terminal UI using a specified BorderStyle and optional color.

The border is drawn on a CanvasBuffer, and the inner content is rendered via a provided callback function, which receives the reduced inner bounds.

This class abstracts the drawing of consistent, styled borders, supporting custom border characters and coloring.

Example

final borderRenderer = BorderRenderer(
  style: BorderStyle.rounded,
  borderColor: AnsiColorType.blue,
);

borderRenderer.draw(buffer, Rect(x: 0, y: 0, width: 10, height: 5), (buf, innerBounds) {
  // Draw child content inside the border
  buf.drawAt(innerBounds.x, innerBounds.y, 'Content inside border');
});

See Also

• BorderStyle: Defines the characters used to draw the border.
• CanvasBuffer: The canvas on which the border and contents are drawn.
• AnsiColorType: Used for coloring the border.

This class is commonly used in terminal UI components that need framed or boxed layouts.

Constructors

BorderRenderer({required BorderStyle style, AnsiColorType? borderColor})

Creates a BorderRenderer with the given style and optional borderColor.

Properties

borderColor ↔ AnsiColorType?

Optional ANSI color to apply to the border characters.

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

style → BorderStyle

The style of the border to render (characters for corners, sides, etc.).

final

Methods

draw(CanvasBuffer buffer, Rect bounds, void drawChild(CanvasBuffer buffer, Rect bounds)) → void

Draws the border on the provided buffer within the given bounds.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited