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R10646/student/lib/widgets/stopdrawer.dart
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stopdrawer.dart
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import 'package:flutter/material.dart';
import "dart:math" as math;
class StopDrawer extends CustomPainter {
Paint _paintBlue;
Paint _paintRed;
double _progress;
Offset beginpath;
Offset endpath;
Offset origin;
var step = 0.0;
List<double> celluloxposition;
List<double> celluloyposition;
double coeffScreenMapHeight;
double coeffScreenMapWidth;
int axisX;
int axisY;
Offset boxCenter;
Offset boxCenterM;
final _textPainter = TextPainter(textDirection: TextDirection.ltr);
StopDrawer(
this.coeffScreenMapWidth, this.coeffScreenMapHeight, this.boxCenter) {
_paintBlue = Paint()
..color = Colors.blue
..strokeWidth = 10.0
..style = PaintingStyle.fill;
_paintRed = Paint()
..color = Colors.red
..strokeWidth = 10.0
..style = PaintingStyle.fill;
boxCenterM = Offset(boxCenter.dx * coeffScreenMapWidth,
boxCenter.dy * coeffScreenMapHeight);
}
Path createStartPath(Offset center, double radius) {
final path = Path();
var angle = (math.pi * 2) / 6;
Offset firstPoint = Offset(radius * math.cos(0.0), radius * math.sin(0.0));
path.moveTo(firstPoint.dx + center.dx, firstPoint.dy + center.dy);
for (int j = 1; j <= 6; j++) {
double x = radius * math.cos(angle * j) + center.dx;
double y = radius * math.sin(angle * j) + center.dy;
path.lineTo(x, y);
}
path.close();
return path;
}
@override
void paint(Canvas canvas, Size size) {
_textPainter.text = TextSpan(
text: 'Stop here',
style: TextStyle(fontWeight: FontWeight.bold, color: Colors.black));
_textPainter.layout(
minWidth: 0,
maxWidth: double.maxFinite,
);
// canvas.drawRect(
// Offset(origin.dx + axisX * step, origin.dy), 11.0, _paintRed);
canvas.drawPath(createStartPath(boxCenterM, 40), _paintBlue);
_textPainter.paint(canvas, Offset(boxCenterM.dx - 27, boxCenterM.dy - 10));
}
@override
bool shouldRepaint(StopDrawer oldDelegate) {
return oldDelegate._progress != _progress;
}
}
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