59 lines
1.6 KiB
Dart
59 lines
1.6 KiB
Dart
import 'dart:io';
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import 'dart:ui';
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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 '../canvas/document_types.dart';
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import '../savesystem/path.dart';
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const _a4width = 210 * PdfPageFormat.mm;
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const _a4height = 297 * PdfPageFormat.mm;
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class _StrokePDFPaint extends pw.Widget {
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List<Stroke> strokes;
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@override
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void layout(pw.Context context, pw.BoxConstraints constraints,
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{bool parentUsesSize = false}) {
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box =
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PdfRect.fromPoints(PdfPoint.zero, const PdfPoint(_a4width, _a4height));
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}
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@override
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void paint(pw.Context context) {
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super.paint(context);
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for (final stroke in strokes) {
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context.canvas.setStrokeColor(PdfColor.fromInt(stroke.color.value));
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for (int i = 0; i < stroke.points.length - 1; i++) {
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Offset pt1 = stroke.points[i].point * PdfPageFormat.mm;
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pt1 = Offset(pt1.dx, _a4height - pt1.dy);
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Offset pt2 = stroke.points[i + 1].point * PdfPageFormat.mm;
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pt2 = Offset(pt2.dx, _a4height - pt2.dy);
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context.canvas.setLineWidth(stroke.points[i].thickness);
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context.canvas.drawLine(pt1.dx, pt1.dy, pt2.dx, pt2.dy);
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context.canvas.strokePath();
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}
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}
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}
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_StrokePDFPaint(this.strokes);
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}
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Future<void> exportPDF(List<Stroke> strokes, String name) async {
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final pdf = pw.Document(title: name);
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const PdfPageFormat a4 = PdfPageFormat(_a4width, _a4height);
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pdf.addPage(pw.Page(
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pageFormat: a4,
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build: (context) => _StrokePDFPaint(strokes),
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));
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final path = await getSavePath();
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final file = File('${path.path}${Platform.pathSeparator}$name');
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await file.writeAsBytes(await pdf.save(), flush: true);
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}
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