Comments (18)
here is example of ITF
https://favpng.com/png_view/interleaved-2-of-5-barcode-itf-14-universal-product-code-png/X8EnP87Z
from dart_barcode.
I think the "0" prefixed ITF14 is a feature of this website which can be easily implemented I'm Dart whenever you need it:
var c = '123456789';
var p = c.padLeft(13, '0');
from dart_barcode.
above is just example what about actual below error , firebase_ml able to scan them and identfied them as ITF 14.
Non-fatal Exception: java.lang.Exception: BarcodeException: Unable to encode "0312341611" to ITF 14 Barcode, it is not 14 digits
Non-fatal Exception: java.lang.Exception: BarcodeException: Unable to encode "60000351" to ITF 14 Barcode, it is not 14 digits
Non-fatal Exception: java.lang.Exception: BarcodeException: Unable to encode "341611" to ITF 14 Barcode, it is not 14 digits
from dart_barcode.
according to below , need to add check
- if code is less than 14 do the following:
append 0 to the code till its 13 digit
and to calculate the checksum(14 digit)
do the following:
How to calculate your check digit yourself
Example barcode number: 501234576421
Step 1: add together all alternate numbers starting from the right
5 0 1 2 3 4 5 7 6 4 2 1
0 + 2 + 4 + 7 + 4 + 1 = 18
Step 2: multiply the answer by 3
18 x 3 = 54
Step 3: now add together the remaining numbers
5 0 1 2 3 4 5 7 6 4 2 1
5 + 1 + 3 + 5 + 6 + 2 = 22
Step 4: add step 2 and 3 together
54 + 22 = 76
Step 5: the difference between step 4 and the next 10th number:
76 + 4 = 80
Check digit = 4
taken from
https://www.gtin.info/check-digit-calculator/
from dart_barcode.
The checksum is correct, I don't understand what's wrong.
from dart_barcode.
what is the best solution to support such barcode and display barcode widget? right now such code are failing..
from dart_barcode.
final myCode = '123456789';
BarcodeWidget(
barcode: Barcode.itf14(),
data: myCode.padLeft(13, '0'),
);
from dart_barcode.
this will not work see below, in case you append zeros and total digit is 14 barcode widget will fail as its not valid ITF14 as checksum is wrong 000000123456789
with 13 digit checksum is calculated and correct barcode generated 0000123456789
http://www.rasteredge.com/online-barcode-generator/itf14/
pls try it buy you self same with ITF 60000351
from dart_barcode.
the code I gave you will padd up to 13 digits and the barcode library will calculate the checksum for you. What more do you want?
from dart_barcode.
from dart_barcode.
from dart_barcode.
If you find that it is required in the official ITF-14 specification, yes. But if you forget a digit, prepending with a zero makes a totally different product code.
from dart_barcode.
since i see alot of BarcodeException can you enhance BarcodeWidget to display redable error Text widget?
like what we have in QRWidget (different plugin)
QrImage(
errorStateBuilder: errorStateBuilder: (cxt, err) {
return Container(
child: Center(
child: Text(
S.of(context).uhOhSomethingWentWrong,
textAlign: TextAlign.center,
),
),
);
},
Non-fatal Exception: java.lang.Exception: BarcodeException: Unable to encode "908001146149" to ITF 14 Barcode, it is not 14 digits
from dart_barcode.
Yes, I can do that.
from dart_barcode.
cool thanks
from dart_barcode.
@kw2019ltd It's implemented in barcode_widget 1.3.0.
from dart_barcode.
cool tnx closing ticket.
from dart_barcode.
Don't hesitate to Buy Me A Coffee.
from dart_barcode.
Related Issues (20)
- The generated data is incorrect HOT 4
- How do I download a barcode image file from the "flutter web"? HOT 1
- Unable to encode "A" to CODABAR Barcode HOT 3
- Determine number of elements/dots in a DataMatrix? HOT 2
- Using Barcode. code128() to generate barcodes will occasionally cause errors HOT 2
- Genererating invalid Aztec in some cases (Usually an 'A' is at the positions where it breaks)
- barcode_image example source code HOT 1
- Addition of Copyright notice file HOT 3
- barcode_image >=2.0.1 depends on image ^3.1.0
- hope qr add title option
- How to add new barcode format ? HOT 1
- Datamatrix SVG bytes are off-by-one from version 2.2.2 onwards HOT 4
- barcode >=2.2.0 depends on qr ^3.0 and qr_flutter >=4.0.0 depends on qr ^2.0.0 HOT 2
- Save as file support HOT 4
- dart_barcode web example source code HOT 1
- Embedding QR code in images and backgrounds HOT 1
- Ean2 barcode error in v2.2.4. HOT 4
- Datamatix: Reproduce the same code as scanned
- Add VEVENT Support
- Support postnet barcode
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from dart_barcode.