49 lines
1.3 KiB
Dart
49 lines
1.3 KiB
Dart
import 'package:flutter/material.dart';
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import 'document_types.dart';
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class MyPainter extends CustomPainter {
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List<Stroke> strokes;
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double zoom;
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Offset offset;
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MyPainter({required this.strokes, required this.zoom, required this.offset});
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@override
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void paint(Canvas canvas, Size size) {
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var paint = Paint()
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..color = Colors.blue
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..strokeCap = StrokeCap.square;
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// ..strokeWidth = 3.0;
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// canvas.scale(zoom);
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print("zoom: ${zoom}");
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canvas.drawColor(Color.fromRGBO(255, 255, 255, .1), BlendMode.src);
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final pagewidth = size.width * zoom;
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final sidewidth = (size.width - pagewidth) / 2;
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canvas.drawLine(Offset(sidewidth, .0), Offset(sidewidth, size.height), paint);
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canvas.drawLine(Offset(sidewidth + pagewidth, .0), Offset(sidewidth + pagewidth, size.height), paint);
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for(final stroke in strokes){
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for(int i = 0; i < stroke.points.length -1; i++){
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final pt1 = stroke.points[i].point;
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final pt2 = stroke.points[i+1].point;
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// final strokewidth = _calcAngleDependentWidth(pt1, pt2, stroke.points[i].thickness);
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canvas.drawLine(pt1, pt2, paint..strokeWidth = stroke.points[i].thickness);
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}
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}
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}
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@override
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bool shouldRepaint(MyPainter oldDelegate) {
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return oldDelegate.strokes != strokes;
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}
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}
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