You can call _generatePdf from a button press or any other event in your Flutter app:
The line-height requirements for Khmer text are taller than English because of upper vowels and lower subscripts. Use style: pw.TextStyle(lineSpacing: 4) to prevent vertical overlapping between text rows.
Most PDF generation packages for Flutter (like printing or pdf ) rely on basic Unicode mapping and simple line breaking. Khmer, however, requires:
import 'package:pdf/pdf.dart'; import 'package:pdf/widgets.dart' as pw; import 'package:flutter/services.dart' show rootBundle;
: Often used alongside the pdf package to provide a UI preview and allow users to print or share the generated document.
Below is a complete implementation showing how to load the Khmer font from your assets and use it to build a structured PDF invoice or report. flutter khmer pdf
The pdf package utilizes its own layout system separate from Flutter's standard material widgets. However, the syntax feels highly familiar.
final directory = await getApplicationDocumentsDirectory(); final file = File('$directory.path/example.pdf'); await file.writeAsBytes(await pdf.save());
import 'package:pdf/widgets' as pw; import 'package:flutter/services.dart' show rootBundle; Future generateKhmerPdf() async final pdf = pw.Document(); // Load Khmer font from assets to avoid broken text rendering final khmerFont = pw.Font.ttf(await rootBundle.load("assets/fonts/KantumruyPro-Regular.ttf")); pdf.addPage( pw.Page( build: (pw.Context context) => pw.Center( child: pw.Text( 'សួស្តីពិភពលោក (Hello World in Khmer)', style: pw.TextStyle(font: khmerFont, fontSize: 24), ), ), ), ); Use code with caution. Tips for Maximizing Your Learning
// 3. Add a page pdf.addPage( pw.Page( build: (pw.Context context) return pw.Center( child: pw.Text( 'សួស្តីពិភពលោក!', // "Hello, World!" in Khmer style: pw.TextStyle(font: ttf, fontSize: 30), ), ); , ), );
Utilizing Container , Row , Column , Stack , and ListView to structure apps for varying screen sizes. You can call _generatePdf from a button press
import 'package:flutter_pdfview/flutter_pdfview.dart';
If a widget falls back to Helvetia or another default Western font, Khmer characters will turn into unreadable rectangles ( ☐☐☐ ). Ensure every pw.Text widget explicitly inherits your assigned pw.ThemeData or has its font style parameter set manually.
Download a Khmer Unicode font (e.g., Khmer OS) and add it to your assets folder: flutter: assets: - assets/fonts/KhmerOS.ttf Use code with caution. Step 3: Implement the PDF Generation Code
This is a commercial-grade library. It generally has more robust support for complex scripts right out of the box compared to open-source alternatives.
In today's digital age, integrating PDF generation capabilities into mobile and web apps has moved from a luxury to a necessity. For Flutter developers, this often means creating invoices, reports, or downloadable content. However, when your user base speaks Khmer, the official language of Cambodia, a major challenge emerges: standard PDF libraries often fail to render its complex, Unicode-based script correctly. This comprehensive guide explores how to bridge that gap. We will break down the best Flutter packages, explain the unique challenges of Khmer typography, and provide a step-by-step blueprint for generating flawless, readable, and professional PDF documents in the Khmer language. Khmer, however, requires: import 'package:pdf/pdf
Resolving rendering issues, text clipping, and font alignment by properly embedding fonts like Kantumruy Pro or Khmer OS Battambang into the pubspec.yaml file.
Once you generate the Khmer PDF, users will want to preview it before printing or saving. Use the flutter_pdfview or printing package previewer widget to accomplish this smoothly.
Here is how to load the font and draw Khmer text on a PDF canvas:
dependencies: flutter: sdk: flutter syncfusion_flutter_pdfviewer: ^xx.x.x Use code with caution. 2. Generating PDFs with Khmer Unicode