BarcodeCode128 class

Code128 Barcode

Code 128 is a high-density linear barcode symbology defined in ISO/IEC 15417:2007. It is used for alphanumeric or numeric-only barcodes.

It can encode all 128 characters of ASCII and, by use of an extension symbol, the Latin-1 characters defined in ISO/IEC 8859-1.

The GS1-128 is an application standard of the GS1. It uses a series of Application Identifiers to include additional data such as best before dates, batch numbers, quantities, weights and many other attributes needed by the user.

Inheritance

Constructors

BarcodeCode128(bool useCode128A, bool useCode128B, bool useCode128C, bool isGS1, bool escapes)
Create a Code128 Barcode
const

Properties

charSet → Iterable<int>
Returns the list of accepted codePoints for this CodeType
no setteroverride
escapes → bool
Use {1} for fnc1, {2} for fnc2, {3} for fnc3, and {4} for fnc4
final
hashCode → int
The hash code for this object.
no setterinherited
isGS1 → bool
Generate a GS1-128 Barcode
final
maxLength → int
Returns maximum number of characters this CodeType can encode
no setterinherited
minLength → int
Returns minimum number of characters this CodeType can encode
no setterinherited
name → String
Returns the name of this CodeType
no setteroverride
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
useCode128A → bool
Use Code 128 A table
final
useCode128B → bool
Use Code 128 B table
final
useCode128C → bool
Use Code 128 C table
final

Methods

adaptData(String data, [bool text = false]) → String
Update the string to insert FNC1
add(int data, int count) → Iterable<bool>
Build a stream of bool that represents a white or black bar from a bit encoded int with count as the number of bars to draw
inherited
convert(String data) → Iterable<bool>
Actual barcode computation method, returns a stream of bool which represents the presence or absence of a bar
override
getHeight(int index, int count, double width, double height, double fontHeight, double textPadding, bool drawText) → double
Get the bar height for a specific index
inherited
getText(String data) → String
Get the generated texts, for testing purposes
inherited
isValid(String data) → bool
Check if the Barcode is valid
inherited
isValidBytes(Uint8List data) → bool
Check if the Barcode is valid
inherited
make(String data, {required double width, required double height, bool drawText = false, double? fontHeight, double? textPadding}) → Iterable<BarcodeElement>
Main method to produce the barcode graphic description. Returns a stream of drawing operations required to properly display the barcode as a UTF-8 string.
inherited
makeBytes(Uint8List data, {required double width, required double height, bool drawText = false, double? fontHeight, double? textPadding}) → Iterable<BarcodeElement>
Generate the barcode graphic description like make but takes a Uint8List data.
inherited
makeText(String data, double width, double height, double fontHeight, double textPadding, double lineWidth) → Iterable<BarcodeElement>
Stream the text operations required to draw the barcode texts. This is automatically called by make
override
marginLeft(bool drawText, double width, double height, double fontHeight, double textPadding) → double
Margin before the first bar
inherited
marginRight(bool drawText, double width, double height, double fontHeight, double textPadding) → double
Margin after the last bar
inherited
marginTop(bool drawText, double width, double height, double fontHeight, double textPadding) → double
Margin at the top of the barcode
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
shortestCode(List<int> data) → Iterable<int>
Find the shortest code using a mix of tables A B or C
toHex(String data) → String
Computes a hexadecimal representation of the barcode, mostly for testing purposes
inherited
toString() → String
A string representation of this object.
inherited
toSvg(String data, {double x = 0, double y = 0, double width = 200, double height = 80, bool drawText = true, String fontFamily = 'monospace', double? fontHeight, double? textPadding, int color = 0x000000, bool fullSvg = true, double baseline = .75}) → String
Create an SVG file with this Barcode from String data
inherited
toSvgBytes(Uint8List data, {double x = 0, double y = 0, double width = 200, double height = 80, bool drawText = true, String fontFamily = 'monospace', double? fontHeight, double? textPadding, int color = 0x000000, bool fullSvg = true, double baseline = .75}) → String
Create an SVG file with this Barcode from Uint8List data
inherited
verify(String data) → void
Check if the Barcode is valid. Throws BarcodeException with a proper message in case of error
inherited
verifyBytes(Uint8List data) → void
Check if the Barcode is valid. Throws BarcodeException with a proper message in case of error
override

Operators

operator ==(Object other) → bool
The equality operator.
inherited