gnssview_old/lib/sky/skyPlot.dart

import 'dart:math';
import 'dart:ui';

import 'package:flutter/material.dart';

class DrawSkyPlot {
  double width = 500;
  double height = 500;
  late Canvas ctx;
  Map legend = {};
  final Paint _paint = Paint();
  Path path = Path();
  bool isPortrait = false;
  final bool isDarkMode;
  Color color = Colors.black;
  DrawSkyPlot(op, this.isDarkMode) {
    ctx = op['ctx']; // canvas dom 对象
    height = op['height']; // 画布高
    width = op['width']; // 画布宽
    if (isDarkMode) {
      color = Colors.white;
    } else {
      color = Colors.black;
    }
    _paint
      ..color = color
      ..strokeWidth = 3
      ..style = PaintingStyle.stroke;
    MediaQueryData mediaQueryData =
        MediaQueryData.fromView(WidgetsBinding.instance.window);
    final orientation = mediaQueryData.orientation;
    // 横屏竖屏宽高重新设置
    if (orientation == Orientation.portrait) {
      height = op['width'];
      isPortrait = true;
    } else {
      width = op['height'];
      isPortrait = false;
    }
  }

  //外圈
  drawSkyPlotCircle() {
    double x = (width / 2) + 50;
    double y = (height / 2) - 15;
    double r = height / 2.5;
    ctx.drawCircle(Offset(x, y), r, _paint);
    ctx.drawCircle(Offset(x, y), r * 2 / 3, _paint);
    ctx.drawCircle(Offset(x, y), r / 3, _paint);
    path.moveTo(x - r, y);
    path.lineTo(x + r, y);
    path.moveTo(x, y - r);
    path.lineTo(x, y + r);
    path.moveTo(x + cos(30 * (pi / 180)) * r, y + sin(30 * (pi / 180)) * r);
    path.lineTo(x - cos(30 * (pi / 180)) * r, y - sin(30 * (pi / 180)) * r);
    path.moveTo(x + cos(60 * (pi / 180)) * r, y + sin(60 * (pi / 180)) * r);
    path.lineTo(x - cos(60 * (pi / 180)) * r, y - sin(60 * (pi / 180)) * r);
    path.moveTo(x + cos(60 * (pi / 180)) * r, y - sin(60 * (pi / 180)) * r);
    path.lineTo(x - cos(60 * (pi / 180)) * r, y + sin(60 * (pi / 180)) * r);
    path.moveTo(x - cos(60 * (pi / 180)) * r, y + sin(60 * (pi / 180)) * r);
    path.lineTo(x + cos(60 * (pi / 180)) * r, y - sin(60 * (pi / 180)) * r);
    path.moveTo(x + cos(30 * (pi / 180)) * r, y - sin(30 * (pi / 180)) * r);
    path.lineTo(x - cos(30 * (pi / 180)) * r, y + sin(30 * (pi / 180)) * r);
    path.moveTo(x - cos(30 * (pi / 180)) * r, y + sin(30 * (pi / 180)) * r);
    path.lineTo(x + cos(30 * (pi / 180)) * r, y - sin(30 * (pi / 180)) * r);
    ctx.drawPath(path, _paint);

    Map textList = {
      '0': Offset(x, y - r - 25),
      '30': Offset(
          x + cos(60 * (pi / 180)) * r, y - sin(60 * (pi / 180)) * r - 25),
      '60': Offset(
          x + cos(30 * (pi / 180)) * r + 10, y - sin(30 * (pi / 180)) * r - 10),
      '90': Offset(x + r + 10, y - 5),
      '120': Offset(
          x + cos(30 * (pi / 180)) * r, y + sin(30 * (pi / 180)) * r + 5),
      '150': Offset(
          x + cos(60 * (pi / 180)) * r, y + sin(60 * (pi / 180)) * r + 5),
      '180': Offset(x - 10, y + r),
      '210': Offset(
          x - cos(60 * (pi / 180)) * r - 20, y + sin(60 * (pi / 180)) * r + 10),
      '240': Offset(
          x - cos(30 * (pi / 180)) * r - 30, y + sin(30 * (pi / 180)) * r + 5),
      '270': Offset(x - r - 35, y - 5),
      '300': Offset(
          x - cos(30 * (pi / 180)) * r - 37, y - sin(30 * (pi / 180)) * r - 20),
      '330': Offset(
          x - cos(60 * (pi / 180)) * r - 30, y - sin(60 * (pi / 180)) * r - 25)
    };
    textList.forEach((key, offset) {
      TextPainter(
        text: TextSpan(text: key, style: TextStyle(color: color, fontSize: 20)),
        textDirection: TextDirection.ltr,
      )
        ..layout()
        ..paint(ctx, offset);
    });
  }

  getCircles() {
    // legend = {};
    double radius = height / 2.5;
    // double radius = height / 4;
    double r = 15;
  }

  // }
}

class DrawSky extends CustomPainter {
  final BuildContext context;
  final bool isDarkMode;
  final List svData;
  DrawSky(this.context, this.isDarkMode, this.svData);
  @override
  void paint(Canvas canvas, Size size) {
    canvas.translate(0, -15);
    final bool isPortrait =
        MediaQuery.of(context).orientation == Orientation.portrait;
    DrawSkyPlot skyPlot = DrawSkyPlot(
        {'ctx': canvas, 'width': size.width, 'height': size.height},
        isDarkMode);
    if (!isPortrait) {
      canvas.translate(-30, 0);
    }
    skyPlot.drawSkyPlotCircle();
    // if (controller.chartData.value.time != 0) {
    if (isPortrait) {
      canvas.translate(size.width / 2, size.height / 2);
    } else {
      canvas.translate(size.width / 2, size.height / 2);
    }

    skyPlot.getCircles();
    if (isPortrait) {
      canvas.translate(-size.width / 2, -size.height / 2);
    } else {
      canvas.translate(-size.width / 2, -size.height / 2);
    }
    // }
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) => true;
}