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guidegrid.dart
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Fri, May 17, 21:33

guidegrid.dart
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import 'package:flutter/material.dart';
class GuideGrid 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;
double xaxis = 750;
double yaxis = 80;
int axisX;
int axisY;
var steps = [0.0, 80.0, 157.0, 235.0, 312.0, 389.0, 467.0];
GuideGrid(this.origin, this.step, this.coeffScreenMapWidth,
this.coeffScreenMapHeight, this.celluloxposition, this.celluloyposition) {
_paintBlue = Paint()
..color = Colors.blue
..strokeWidth = 1.0
..style = PaintingStyle.fill;
_paintRed = Paint()
..color = Colors.red
..strokeWidth = 1.0
..style = PaintingStyle.fill;
axisX =
((celluloxposition[0] - origin.dx / coeffScreenMapWidth) ~/ step) - 1;
axisY =
((origin.dy - celluloyposition[1] / coeffScreenMapHeight) ~/ step) + 1;
if (axisX < 0) axisX = 0;
if (axisY < 0) axisY = 0;
if (axisX > 6) axisX = 6;
if (axisY > 6) axisY = 6;
}
@override
void paint(Canvas canvas, Size size) {
canvas.drawCircle(
Offset(origin.dx + steps[axisX], origin.dy), 11.0, _paintRed);
canvas.drawCircle(
Offset(origin.dx, origin.dy - steps[axisY]), 11.0, _paintBlue);
canvas.drawLine(
Offset(celluloxposition[0] * coeffScreenMapWidth,
celluloyposition[1] * coeffScreenMapHeight),
Offset(celluloxposition[0] * coeffScreenMapWidth,
xaxis * coeffScreenMapHeight),
_paintRed);
canvas.drawLine(
Offset(celluloxposition[0] * coeffScreenMapWidth,
celluloyposition[1] * coeffScreenMapHeight),
Offset(yaxis * coeffScreenMapWidth,
celluloyposition[1] * coeffScreenMapHeight),
_paintBlue);
}
@override
bool shouldRepaint(GuideGrid oldDelegate) {
return oldDelegate._progress != _progress;
}
}

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