pile_nav_new/lib/pages/task/pile/pileNav/draw_pile.dart

import 'dart:developer' as dev;
// import 'dart:math';

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:scence_map/controllers/controller.dart';
import 'package:scence_map/controllers/plum_controller.dart';

import 'view.dart';

ScenceMapController mapController = Get.find<ScenceMapController>();

class DrawDirection extends CustomPainter {
  PlumDataController controller;
  Offset pos;
  bool isDarkMode;
  bool isInit;
  DrawDirection(this.controller, this.pos, this.isDarkMode, this.isInit);

  @override
  void paint(Canvas canvas, Size size) {
    controller.canvasSize = size;
    final paint = Paint();
    Path path = Path();

    paint
      ..strokeWidth = 2
      ..style = PaintingStyle.stroke
      ..color = isDarkMode ? Colors.white : Colors.black;
    if (controller.linePointOffset.value == Offset.zero ||
        controller.centerXY.value == Offset.zero ||
        controller.checkValue.value == "checkPile") {
      return;
    }

    Offset linePointOffset = mapController.xy2Screen(
        controller.linePointXY.value.dx, controller.linePointXY.value.dy);
    Offset centerOffset = controller.centerOffset.value;
    Offset centerXY = controller.centerXY.value;
    if (isInit) {
      linePointOffset = linePointOffset + pos;
      centerOffset = controller.centerOffset.value + pos;
    }
    dev.log("-----矩阵中心$centerOffset,$centerXY");

    path.moveTo(centerOffset.dx, centerOffset.dy);
    path.lineTo(linePointOffset.dx, linePointOffset.dy);
    canvas.drawPath(path, paint);
    paint.style = PaintingStyle.fill;
    // double deLength = 100;

    // double angle = atan2((linePointOffset.dy - centerOffset.dy),
    //     (linePointOffset.dx - centerOffset.dx));
    //     // dev.log("-----角度$angle,${controller.angle.value}");
    // canvas.drawCircle(linePointOffset, 10, paint);
    // var dx1 = (deLength * cos(angle + pi / 2)) + centerOffset.dx;
    // var dy1 = (deLength) * sin(angle + pi / 2) + centerOffset.dy;

    // canvas.drawCircle(Offset(dx1, dy1), 10, paint);

    // dx1 = (deLength * cos(angle + pi)) + centerOffset.dx;
    // dy1 = (deLength) * sin(angle + pi) + centerOffset.dy;

    // canvas.drawCircle(Offset(dx1, dy1), 10, paint);

    // dx1 = (deLength * cos(angle + pi / 2 * 3)) + centerOffset.dx;
    // dy1 = (deLength) * sin(angle + pi / 2 * 3) + centerOffset.dy;

    // canvas.drawCircle(Offset(dx1, dy1), 10, paint);

    paint
        // ..color = Colors.grey.withOpacity(.4)
        .style = PaintingStyle.stroke;

    if (controller.isUp.value && controller.angle.value != 0) {
      List<Offset> rect = getRect(controller.distancesOffset);
      List<Offset> outRect = getOutRect(rect, centerOffset, linePointOffset);
      double unit = controller.space / mapController.pixel2MeterRatio;

      paint.color = Colors.grey;

      canvas.drawLine(rect[0], rect[1], paint); // 绘制上边
      canvas.drawLine(rect[1], rect[2], paint); // 绘制右边
      canvas.drawLine(rect[2], rect[3], paint); // 绘制下边
      canvas.drawLine(rect[3], rect[0], paint); // 绘制左边

      // 沿着路径绘制圆圈
      double distance = (outRect[2] - outRect[0]).distance;
      int horizonalCircles = (distance / unit).ceil();
      taskcontroller.currentask.value.list.length = 0;
      List<Offset> circlePoints = [];
      paint.color = Colors.yellow;
      //
      double minY = rect[0].dy;
      double maxY = rect[2].dy;
      double minX = rect[0].dx;
      double maxX = rect[2].dx;
      bool centerEven = false;
      for (int j = -1; j <= horizonalCircles; j++) {
        double t = j * unit / distance;
        Offset point = Offset.lerp(centerOffset, linePointOffset, t)!;
        circlePoints.add(point);
        if (j > 1) {
          Offset point1 = Offset.lerp(centerOffset, linePointOffset, -t)!;
          if (point1.dx >= (minX - unit) &&
              point1.dx <= (maxX + unit) &&
              point1.dy >= (minY - unit) &&
              point1.dy <= (maxY + unit)) {
            circlePoints.add(point1);
            if (point1 - centerOffset < Offset(unit, unit)) {
              centerEven = circlePoints.length % 2 == 0;
            }
          }
          //
        }
      }
      circlePoints.sort((a, b) => a.dx.compareTo(b.dx));
      Offset direction =
          (linePointOffset - centerOffset).scale(1 / distance, 1 / distance);
      Offset perpendicular = Offset(-direction.dy, direction.dx);
      controller.plumList.length = 0;
      // 绘制上下方的圆圈，形成正方形矩阵

      for (int p = 0; p <= circlePoints.length - 1; p++) {
        Offset point = circlePoints[p];

        for (int j = 0; j <= horizonalCircles; j++) {
          Offset upPoint = point + perpendicular * (j * unit);
          Offset downPoint = point - perpendicular * (j * unit);
          bool isUpPointInRect = upPoint.dx >= minX &&
              upPoint.dx <= maxX &&
              upPoint.dy >= minY &&
              upPoint.dy <= maxY;
          bool isDownPointInRect = downPoint.dx >= minX &&
              downPoint.dx <= maxX &&
              downPoint.dy >= minY &&
              downPoint.dy <= maxY;
          if (controller.isPlum.value) {
            if ((j % 2 == p % 2) == centerEven) {
              paint.style = PaintingStyle.fill;
            } else {
              paint.style = PaintingStyle.stroke;
            }
            if (isDownPointInRect && j > 0) {
              canvas.drawCircle(
                  downPoint, .3 / mapController.pixel2MeterRatio, paint);
              if ((j % 2 == p % 2) == centerEven) {
                Offset xy1 = mapController.screen2xy0(downPoint);
                controller.plumList.add(xy1);
              }
            }

            if (isUpPointInRect) {
              canvas.drawCircle(
                  upPoint, .3 / mapController.pixel2MeterRatio, paint);
              if ((j % 2 == p % 2) != centerEven) {
                Offset xy = mapController.screen2xy0(upPoint);
                controller.plumList.add(xy);
              }
            }
            continue;
          }

          if (isUpPointInRect) {
            // TextPainter textPainter = TextPainter(
            //   text: TextSpan(
            //       text: '$p,$j',
            //       style: TextStyle(color: Colors.blue, fontSize: 16)),
            //   textDirection: TextDirection.ltr,
            // );
            // textPainter.layout();
            // textPainter.paint(canvas, upPoint);
            canvas.drawCircle(
                upPoint, .3 / mapController.pixel2MeterRatio, paint);
            Offset xy = mapController.screen2xy0(upPoint);
            controller.plumList.add(xy);
          }

          if (isDownPointInRect && j > 0) {
            // TextPainter textPainter = TextPainter(
            //   text: TextSpan(
            //       text: '$p,$j',
            //       style: TextStyle(color: Colors.blue, fontSize: 16)),
            //   textDirection: TextDirection.ltr,
            // );
            // textPainter.layout();
            // textPainter.paint(canvas, downPoint);
            canvas.drawCircle(
                downPoint, .3 / mapController.pixel2MeterRatio, paint);
            Offset xy1 = mapController.screen2xy0(downPoint);
            controller.plumList.add(xy1);
          }
        }
      }
      dev.log("controller.plumList:${controller.plumList.length}");
    }
  }

  getRect(List<Offset> list) {
    List<Offset> rect = [];
    double minx = double.infinity;
    double maxx = double.negativeInfinity;
    double miny = double.infinity;
    double maxy = double.negativeInfinity;
    for (var point in list) {
      minx = point.dx < minx ? point.dx : minx;
      maxx = point.dx > maxx ? point.dx : maxx;
      miny = point.dy < miny ? point.dy : miny;
      maxy = point.dy > maxy ? point.dy : maxy;
    }
    minx += controller.transOff.dx;
    maxx += controller.transOff.dx;
    miny += controller.transOff.dy;
    maxy += controller.transOff.dy;
    // 根据最小最大坐标生成矩形的四个顶点
    rect.add(Offset(minx, miny)); // 左下角
    rect.add(Offset(maxx, miny)); // 右下角
    rect.add(Offset(maxx, maxy)); // 右上角
    rect.add(Offset(minx, maxy)); // 左上角

    return rect;
  }

  getOutRect(List<Offset> rect, Offset centerOffset, Offset linePointOffset) {
    // double height = rect[2].dy - rect[0].dy;
    // double width = rect[1].dx - rect[0].dx;
    double newHeight = (centerOffset.dy - linePointOffset.dy) * 2;
    double newWidth = (centerOffset.dx - linePointOffset.dx) * 2;
    // if (newHeight < height) {
    //   newHeight = height;
    // }
    // if (newWidth < width) {
    //   newWidth = width;
    // }
    Offset topLeft =
        Offset(centerOffset.dx - newWidth / 2, centerOffset.dy - newHeight / 2);
    Offset topRight =
        Offset(centerOffset.dx + newWidth / 2, centerOffset.dy - newHeight / 2);
    Offset bottomLeft =
        Offset(centerOffset.dx - newWidth / 2, centerOffset.dy + newHeight / 2);
    Offset bottomRight =
        Offset(centerOffset.dx + newWidth / 2, centerOffset.dy + newHeight / 2);
    return [
      bottomLeft,
      bottomRight,
      topRight,
      topLeft,
    ];
  }

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