2026-01-11 08:17:29 +00:00
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import 'dart:io';
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import 'package:flutter/foundation.dart';
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import 'package:pdf/pdf.dart';
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import 'package:pdf/widgets.dart' as pw;
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import 'package:printing/printing.dart';
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import 'package:qr/qr.dart';
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import '../models/sake_item.dart';
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import 'pricing_calculator.dart';
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import 'pricing_helper.dart';
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class PdfService {
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static Future<Uint8List> generateMenuPdf(
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List<SakeItem> items, {
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required String title,
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required String date,
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required bool includePhoto,
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required bool includePoem,
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required bool includeChart,
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required bool includePrice,
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required bool includeDate,
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required bool includeQr, // New parameter
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String pdfSize = 'a4', // 'a4', 'a5', 'b5'
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bool isMonochrome = false,
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bool isPortrait = true,
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double density = 1.2,
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}) async {
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final pdf = pw.Document();
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// Font Loading
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final font = await PdfGoogleFonts.notoSansJPRegular();
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// Prepare Images (Monochrome processing handled in View or here?
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// Ideally Printing package handles output color, but for "Preview" we might want processing.
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// But Printing package's `PdfPreview` usually handles grayscale display if pdf is standard.
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// However, user requested "Monochrome Preview Fix", meaning usually `PdfPreview` shows color even if printer driver will default to bw.
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// We can pre-process images to grayscale here if isMonochrome is true.
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final Map<String, pw.MemoryImage?> itemImages = {};
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for (var item in items) {
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if (item.displayData.imagePaths.isNotEmpty) {
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final file = File(item.displayData.imagePaths.first);
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if (await file.exists()) {
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try {
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final bytes = await file.readAsBytes();
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// In a real app we might use `image` package to grayscale here.
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// For now, let's load raw bytes.
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// Printing package's `PdfPreview` has `build(...)` that returns bytes.
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itemImages[item.id] = pw.MemoryImage(bytes);
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} catch (e) {
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debugPrint('Error loading image for ${item.displayData.name}: $e');
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itemImages[item.id] = null;
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}
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}
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}
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}
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final PdfPageFormat rawFormat = _getPageFormat(pdfSize);
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final PdfPageFormat pageFormat = isPortrait ? rawFormat : rawFormat.landscape;
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// Density Calculation
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// Base items per page (Normal Density 1.0)
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// A4: 8, A5: 4, B5: 6 (Roughly)
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// With Density 1.2 (High) -> +20% items
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// With Density 1.5 -> +50% items
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// Let's define base items per page for "1.0"
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int baseItems = 0;
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switch (pdfSize) {
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case 'a5': baseItems = 4; break;
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case 'b5': baseItems = 6; break;
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case 'a4': default: baseItems = 8; break;
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}
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final int itemsPerPage = (baseItems * density).round().clamp(1, 20); // Safety clamp
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final int crossAxisCount = _getCrossAxisCount(pdfSize); // 1 or 2
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for (var i = 0; i < items.length; i += itemsPerPage) {
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final chunk = items.skip(i).take(itemsPerPage).toList();
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final double titleFontSize = _getTitleFontSize(pdfSize);
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final double dateFontSize = _getDateFontSize(pdfSize);
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final double margin = _getPageMargin(pdfSize);
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pdf.addPage(
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pw.Page(
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pageFormat: pageFormat,
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margin: pw.EdgeInsets.all(margin),
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theme: pw.ThemeData.withFont(base: font),
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build: (context) {
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return pw.Column(
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children: [
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// Header
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pw.Column(
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crossAxisAlignment: pw.CrossAxisAlignment.start,
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children: [
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// Title Row with Tax Label
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pw.Row(
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crossAxisAlignment: pw.CrossAxisAlignment.start,
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mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
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children: [
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pw.Expanded(
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child: pw.Container(
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decoration: pw.BoxDecoration(
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border: pw.Border(bottom: pw.BorderSide(color: PdfColors.grey400, width: 1.5)),
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),
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padding: const pw.EdgeInsets.only(bottom: 4),
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child: pw.Text(
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title,
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style: pw.TextStyle(fontSize: titleFontSize, font: font, fontWeight: pw.FontWeight.bold),
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),
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),
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),
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// Tax Included Label (Top Right)
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if (includePrice) ...[
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pw.SizedBox(width: 8),
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pw.Container(
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padding: const pw.EdgeInsets.symmetric(horizontal: 6, vertical: 3),
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decoration: pw.BoxDecoration(
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border: pw.Border.all(color: PdfColors.grey500),
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borderRadius: pw.BorderRadius.circular(4),
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),
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child: pw.Text(
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'税込価格',
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style: pw.TextStyle(
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fontSize: dateFontSize * 0.95,
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font: font,
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color: PdfColors.grey700,
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),
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),
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),
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],
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],
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),
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// Date (if included)
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if (includeDate && date.isNotEmpty)
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pw.Padding(
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padding: const pw.EdgeInsets.only(bottom: 4, top: 4),
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child: pw.Text(date, style: pw.TextStyle(fontSize: dateFontSize, font: font)),
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),
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],
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),
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pw.SizedBox(height: 4),
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pw.Expanded(
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child: pw.Column(
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children: [
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for (var r = 0; r < (itemsPerPage / crossAxisCount).ceil(); r++)
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pw.Expanded(
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child: pw.Row(
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crossAxisAlignment: pw.CrossAxisAlignment.stretch,
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children: [
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for (var c = 0; c < crossAxisCount; c++) ...[
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() {
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final indexInChunk = r * crossAxisCount + c;
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if (indexInChunk < chunk.length) {
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return pw.Expanded(
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child: _buildMenuItem(
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chunk[indexInChunk],
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includePhoto ? itemImages[chunk[indexInChunk].id] : null,
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includePoem,
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includeChart,
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includePrice,
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includeQr,
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font,
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pdfSize,
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density, // Pass density to scale standard sizes if needed
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isMonochrome,
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),
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);
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} else {
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return pw.Expanded(child: pw.SizedBox());
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}
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}(),
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if (c < crossAxisCount - 1)
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pw.SizedBox(width: _getGridSpacing(pdfSize)),
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],
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],
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),
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),
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],
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),
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),
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],
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);
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},
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),
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);
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}
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return pdf.save();
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}
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static pw.Widget _buildMenuItem(
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SakeItem item,
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pw.MemoryImage? image,
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bool includePoem,
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bool includeChart,
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bool includePrice,
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bool includeQr,
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pw.Font font,
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String pdfSize,
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double density,
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bool isMonochrome,
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) {
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// When absolute density increases (more items), font sizes might need specific scaling
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// IF the container becomes too small.
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// However, `pw.Expanded` handles height distribution.
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// If text overflows, we might need auto-scaling.
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// For now, let's keep fonts standard but reduce padding slightly if density is high.
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final price = includePrice ? PricingCalculator.calculatePrice(item) : 0;
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// Scale down fonts slightly if density > 1.2
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double scale = 1.0;
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if (density > 1.2) scale = 0.9;
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if (density > 1.4) scale = 0.85;
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final double nameFontSize = _getNameFontSize(pdfSize) * scale;
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final double priceFontSize = _getPriceFontSize(pdfSize) * scale;
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final double infoFontSize = _getInfoFontSize(pdfSize) * scale;
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final double poemFontSize = _getPoemFontSize(pdfSize) * scale;
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final double imageSize = _getImageSize(pdfSize) * scale;
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// Extreme compaction for high density
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final double containerPadding = density > 1.0 ? 2 : _getContainerPadding(pdfSize) * scale;
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// Grayscale Filter for Image
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pw.ImageProvider? processedImage = image;
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// For monochrome logic:
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// We can't easily filter the image bytes without decode, but text colors are handled.
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final textColor = isMonochrome ? PdfColors.black : PdfColors.black;
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final accentColor = isMonochrome ? PdfColors.grey800 : PdfColors.brown400;
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final subColor = isMonochrome ? PdfColors.grey700 : PdfColors.grey700;
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return pw.Container(
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decoration: pw.BoxDecoration(
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border: pw.Border(bottom: pw.BorderSide(color: PdfColors.grey300, width: 0.5)),
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),
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padding: pw.EdgeInsets.symmetric(vertical: containerPadding, horizontal: containerPadding),
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child: pw.Row(
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crossAxisAlignment: pw.CrossAxisAlignment.start,
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children: [
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// Left: Photo
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if (image != null) ...[
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pw.Container(
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width: imageSize,
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height: imageSize,
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decoration: pw.BoxDecoration(
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borderRadius: pw.BorderRadius.circular(4),
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image: pw.DecorationImage(image: image, fit: pw.BoxFit.cover),
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),
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),
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pw.SizedBox(width: 10), // Increased Gap
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],
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// Right: Content
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pw.Expanded(
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child: pw.Row(
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crossAxisAlignment: pw.CrossAxisAlignment.start,
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children: [
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// Left Column: Name, Brewery, Catch Copy
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pw.Expanded(
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child: pw.Column(
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crossAxisAlignment: pw.CrossAxisAlignment.start,
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mainAxisAlignment: pw.MainAxisAlignment.start,
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children: [
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// 1. Name
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pw.Text(
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item.displayData.name,
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style: pw.TextStyle(fontSize: nameFontSize, fontWeight: pw.FontWeight.bold, font: font),
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maxLines: 2,
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),
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// 2. Brewery / Prefecture
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if (item.itemType != ItemType.set) ...[
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pw.SizedBox(height: 2),
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pw.Text(
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'${item.displayData.brewery} / ${item.displayData.prefecture}',
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style: pw.TextStyle(fontSize: infoFontSize, color: subColor, font: font),
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maxLines: 1,
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),
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],
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// 3. Catch Copy (Poem)
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if (includePoem && item.displayData.catchCopy != null) ...[
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pw.SizedBox(height: 4),
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pw.Container(
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padding: const pw.EdgeInsets.only(left: 6),
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decoration: pw.BoxDecoration(
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border: pw.Border(left: pw.BorderSide(color: isMonochrome ? PdfColors.grey500 : PdfColors.grey400, width: 1.5))
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),
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child: pw.Text(
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item.displayData.catchCopy!,
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style: pw.TextStyle(fontSize: poemFontSize, font: font, fontStyle: pw.FontStyle.italic, color: accentColor),
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maxLines: 2,
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tightBounds: true,
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),
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),
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],
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],
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),
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),
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// Right Column: Price (right-aligned)
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if (includePrice) ...[
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pw.SizedBox(width: 8),
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_buildCompactPriceTag(item, price, priceFontSize, font),
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],
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// 6. QR Code (Data-in-QR)
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if (includeQr) ...[
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pw.SizedBox(width: 8),
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_buildQrCode(item),
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]
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],
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),
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),
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],
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)
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);
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}
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static pw.Widget _buildQrCode(SakeItem item) {
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// Compact JSON for QR
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final jsonStr = item.toQrJson();
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// "Cute" QR Rendering using CustomPaint (Vector) to draw circles
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final qrCode = QrCode.fromData(
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data: jsonStr,
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errorCorrectLevel: QrErrorCorrectLevel.M,
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);
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final qrImage = QrImage(qrCode);
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return pw.Container(
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width: 40,
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height: 40,
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child: pw.CustomPaint(
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size: const PdfPoint(40, 40),
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painter: (PdfGraphics canvas, PdfPoint size) {
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final double pixelSize = size.x / qrImage.moduleCount;
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for (var x = 0; x < qrImage.moduleCount; x++) {
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for (var y = 0; y < qrImage.moduleCount; y++) {
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if (qrImage.isDark(y, x)) {
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final double cx = x * pixelSize + pixelSize / 2;
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final double cy = y * pixelSize + pixelSize / 2;
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// Increase radius ratio for cuter look (0.9 -> 1.0 or slightly overlaps? 0.85 for cleaner dots)
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// Let's use 1.0 for full circles that touch (cute)
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final double radius = pixelSize / 2 * 0.95;
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// Corner finding logic for "Eyes" (Position Detection Patterns)
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// Top-Left: (0-6, 0-6). Top-Right: (last-7 to last, 0-6). Bottom-Left: (0-6, last-7 to last)
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// We can color them differently or keep uniformity.
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// For "Cute", let's keep it uniform black circles but sharp.
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canvas.drawEllipse(cx, cy, radius, radius);
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canvas.setFillColor(PdfColors.black);
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canvas.fillPath();
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}
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}
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}
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}
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),
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);
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}
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static pw.Widget _buildCompactPriceTag(SakeItem item, int calcPrice, double fontSize, pw.Font font) {
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if (item.userData.priceVariants != null && item.userData.priceVariants!.isNotEmpty) {
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// Multi-price: Column aligned to right
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return pw.Column(
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crossAxisAlignment: pw.CrossAxisAlignment.end,
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children: item.userData.priceVariants!.entries.take(3).map((e) =>
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pw.RichText(
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text: pw.TextSpan(
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children: [
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pw.TextSpan(text: '${e.key} ', style: pw.TextStyle(font: font, fontSize: fontSize * 0.7, color: PdfColors.grey700)),
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pw.TextSpan(text: '${PricingHelper.formatPrice(e.value)}円', style: pw.TextStyle(font: font, fontSize: fontSize, fontWeight: pw.FontWeight.bold)),
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]
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)
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)
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).toList(),
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);
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} else if (calcPrice > 0) {
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return pw.Text(
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'${PricingHelper.formatPrice(calcPrice)}円',
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style: pw.TextStyle(font: font, fontSize: fontSize, fontWeight: pw.FontWeight.bold),
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);
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}
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return pw.SizedBox();
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}
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static PdfPageFormat _getPageFormat(String size) {
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|
switch (size) {
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|
case 'a5': return PdfPageFormat.a5; // 148 x 210
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case 'b5': return PdfPageFormat(182 * PdfPageFormat.mm, 257 * PdfPageFormat.mm); // 182 x 257 (Portrait)
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case 'a4': default: return PdfPageFormat.a4; // 210 x 297
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}
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}
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// TWEAKED SIZES For "Standard" Template
|
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|
|
static double _getTitleFontSize(String pdfSize) => pdfSize == 'a5' ? 16.0 : 20.0;
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static double _getDateFontSize(String pdfSize) => pdfSize == 'a5' ? 9.0 : 10.0;
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static double _getNameFontSize(String pdfSize) => pdfSize == 'a5' ? 12.0 : (pdfSize == 'b5' ? 12.0 : 14.0);
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static double _getPriceFontSize(String pdfSize) => pdfSize == 'a5' ? 12.0 : (pdfSize == 'b5' ? 12.0 : 14.0);
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static double _getInfoFontSize(String pdfSize) => pdfSize == 'a5' ? 8.0 : (pdfSize == 'b5' ? 8.0 : 9.0);
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static double _getPoemFontSize(String pdfSize) => pdfSize == 'a5' ? 8.5 : (pdfSize == 'b5' ? 8.5 : 10.0);
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|
|
static double _getImageSize(String pdfSize) {
|
|
|
|
|
switch (pdfSize) {
|
|
|
|
|
case 'a5': return 50.0; // Increased from 40
|
|
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|
|
case 'b5': return 50.0;
|
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|
|
case 'a4': default: return 60.0;
|
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|
|
}
|
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|
|
}
|
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|
|
static double _getContainerPadding(String pdfSize) => 6.0;
|
|
|
|
|
static double _getPageMargin(String pdfSize) => 10.0 * PdfPageFormat.mm;
|
|
|
|
|
static double _getGridSpacing(String pdfSize) => 8.0;
|
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|
|
|
|
2026-01-13 01:33:13 +00:00
|
|
|
|
2026-01-11 08:17:29 +00:00
|
|
|
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|
|
static int _getCrossAxisCount(String pdfSize) {
|
|
|
|
|
switch (pdfSize) {
|
|
|
|
|
case 'a5': return 1;
|
|
|
|
|
case 'b5': return 2;
|
|
|
|
|
case 'a4': default: return 2;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
