QrStyle enum

Defines the visual styling options for QR codes.

This enum provides 10 distinct visual styles for QR codes, ranging from the standard solid pattern to artistic styles with special effects. All styles maintain the QR code's scannability while offering various aesthetic options.

These styles only apply to QR codes and have no effect on other barcode types like EAN-13 or Code 128.

Example usage:

// Create a QR code with a gradient style
QrBarGenView(
  data: 'https://flutter.dev',
  type: QrBarType.qr,
  qrStyle: QrStyle.gradient,
  fg: Colors.blue,
  secondaryColor: Colors.purple,
);

Most styles work with standard QR code readers, but some of the more decorative styles might reduce scannability with low-quality cameras. The standard style provides maximum compatibility.

Inheritance

• Object
• Enum
• QrStyle

Available extensions

• EnumName
• QrStyleExt

Values

standard → const QrStyle

Standard QR code with solid colors (default)

This is the classic QR code appearance with square modules and solid colors. Provides maximum compatibility with all QR code scanners.

Example parameters:

• fg: Sets the color of all QR modules
• bg: Sets the background color

rounded → const QrStyle

Rounded corners on QR modules for a softer look

Maintains the standard QR pattern but replaces square data modules with circles, creating a softer, more modern appearance.

The eye patterns remain square for better recognition while the data modules are circular.

withLogo → const QrStyle

QR code with a logo/image in the center

Embeds a custom logo or image in the center of the QR code. QR codes have built-in error correction that allows parts of the code to be obscured while remaining functional.

Requires the logo parameter to be set with an ImageProvider. The logo should not be too large (typically not more than 25% of the QR size).

gradient → const QrStyle

QR code with gradient coloring

Applies a smooth color transition from the primary color to the secondary color across the QR code, creating a visually appealing gradient effect.

Requires the secondaryColor parameter to be set. The gradient runs from top-left to bottom-right.

fancyEyes → const QrStyle

QR code with distinct eye styling

Customizes the three positioning marker squares (eyes) in the corners of the QR code with a different color and circular shape.

Uses the secondaryColor parameter to color the eye patterns, while the main data modules use the standard fg color.

dots → const QrStyle

QR code with dot-pattern modules

Renders all modules (both eyes and data) as circles instead of squares, creating a distinctive dotted appearance.

This style creates a more modern, softer visual while maintaining good scannability.

framed → const QrStyle

QR code with a custom frame around it

Adds a decorative border around the QR code with customizable color and width.

Uses the frameColor parameter for the border color and frameWidth for the border thickness. The border has rounded corners.

shadow → const QrStyle

QR code with a shadow effect

Applies a drop shadow behind the QR code for a subtle 3D effect.

Customizable with shadowColor, shadowOffset, and shadowBlurRadius parameters to control the appearance of the shadow.

mosaic → const QrStyle

QR code with alternating colors in a checkerboard pattern

Creates a two-tone effect by alternating between two colors in a checkerboard pattern across the QR modules.

Uses the fg color for the primary modules and secondaryColor for the alternating modules to create a distinctive mosaic pattern.

pixelArt → const QrStyle

QR code that emulates a retro pixel art style

Applies different colors to different parts of the QR code to create a retro gaming aesthetic, with different colors for the corners, edges, and central data.

Uses all three color parameters:

• fg for the main data modules
• secondaryColor for the edges
• tertiaryColor for the corner patterns

Properties

hashCode → int

The hash code for this object.

no setter, inherited

index → int

A numeric identifier for the enumerated value.

no setter, inherited

label → String

Available on QrStyle, provided by the QrStyleExt extension

Returns a human-readable label for each QR style.

no setter

name → String

Available on Enum, provided by the EnumName extension

The name of the enum value.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

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

Constants

values → const List<QrStyle>

A constant List of the values in this enum, in order of their declaration.