fis_lib_measure/lib/process/calcuators/shell_calcuator.dart

import 'dart:convert';
import 'dart:ui';

import 'package:fis_measure/interfaces/date_types/point.dart';
import 'package:fis_measure/interfaces/process/items/measure_terms.dart';
import 'package:fis_measure/process/primitives/carotid_imt.dart';
import 'package:fis_measure/utils/js_utils.dart';
import 'package:vid/us/vid_us_unit.dart';

import 'calculator.dart';

class ShellCal extends Calculator<CarotidIMT, double> {
  ShellCal(CarotidIMT ref) : super(ref);

  @override
  void calculate() {
    if (ref.feature == null) return;
    final p1 = ref.feature!.startPoint;
    final p2 = ref.feature!.endPoint;
    //左上顶点
    final leftTopPoint =
        DPoint(p1.x < p2.x ? p1.x : p2.x, p1.y < p2.y ? p1.y : p2.y);
    //右下顶点
    final rightBottomPoint =
        DPoint(p1.x > p2.x ? p1.x : p2.x, p1.y > p2.y ? p1.y : p2.y);
    final outputItem = createOutput(MeasureTerms.Distance, 0.0, VidUsUnit.cm);
    //图片尺寸
    final imageSize = ref.application.carotid2DSize;
    //画布尺寸
    final canavsSize = ref.application.displaySize;
    //图像缩放比
    final imageScale = ref.application.displayScaleRatio;
    //标准画布尺寸
    final stdCanavsSize =
        Size(canavsSize.width / imageScale, canavsSize.height / imageScale);
    final imageLeftTopPoint = DPoint(
        (stdCanavsSize.width - imageSize.width) / 2,
        (stdCanavsSize.height - imageSize.height) / 2);
    final imageRightBottomPoint = DPoint(imageLeftTopPoint.x + imageSize.width,
        imageLeftTopPoint.y + imageSize.height);
    final rectLeftTopPoint = DPoint(stdCanavsSize.width * leftTopPoint.x,
        stdCanavsSize.height * leftTopPoint.y);
    final rectRightBottomPoint = DPoint(
        stdCanavsSize.width * rightBottomPoint.x,
        stdCanavsSize.height * rightBottomPoint.y);

    /// 在图像外的点改到图像边缘上
    if (rectLeftTopPoint.x < imageLeftTopPoint.x) {
      rectLeftTopPoint.x = imageLeftTopPoint.x;
    }
    if (rectLeftTopPoint.x > imageRightBottomPoint.x) {
      rectLeftTopPoint.x = imageRightBottomPoint.x;
    }
    if (rectLeftTopPoint.y < imageLeftTopPoint.y) {
      rectLeftTopPoint.y = imageLeftTopPoint.y;
    }
    if (rectLeftTopPoint.y > imageRightBottomPoint.y) {
      rectLeftTopPoint.y = imageRightBottomPoint.y;
    }
    if (rectRightBottomPoint.x > imageRightBottomPoint.x) {
      rectRightBottomPoint.x = imageRightBottomPoint.x;
    }
    if (rectRightBottomPoint.x < imageLeftTopPoint.x) {
      rectRightBottomPoint.x = imageLeftTopPoint.x;
    }
    if (rectRightBottomPoint.y > imageRightBottomPoint.y) {
      rectRightBottomPoint.y = imageRightBottomPoint.y;
    }
    if (rectRightBottomPoint.y < imageLeftTopPoint.y) {
      rectRightBottomPoint.y = imageLeftTopPoint.y;
    }

    final rectLeft = (rectLeftTopPoint.x - imageLeftTopPoint.x).round();
    final rectTop = (rectLeftTopPoint.y - imageLeftTopPoint.y).round();
    final rectWidth = (rectRightBottomPoint.x - rectLeftTopPoint.x).round();
    final rectHeight = (rectRightBottomPoint.y - rectLeftTopPoint.y).round();
    final params =
        "{'MeasureItemType':'AntMeasureItem','IntimaRect':{'Left':$rectLeft,'Top':$rectTop,'Width':$rectWidth,'Height':$rectHeight}}";

    String description = "IMT\n Measuring";

    /// [Carotid] ✅在此处通知 Shell 计算，获取 description，touch/mouse finished 时绘制结果
    try {
      callShellMethod('getMeasureResult', [params]).callMethod(
        'then',
        [
          (result) {
            // print("getMeasureResult: $result");
            final res = jsonDecode(result);
            // print("getMeasureResult: $res");
            // print("getMeasureResult: ${res['ErrorCode']}");
            if (res['ErrorCode'].toString() == "1000") {
              description =
                  "Ant.CCA IMT\n Max: ${res['MaxThickness'].toStringAsFixed(2)}mm\n Min: ${res['MinThickness'].toStringAsFixed(2)}mm\n Avg: ${res['AverageThickness'].toStringAsFixed(2)}mm\n SD: ${res['SdThickness'].toStringAsFixed(2)}mm";
              List<Offset> lowerPoints = [];
              List<Offset> upperPoints = [];
              for (var i = 0; i < res['PointLower'].length; i++) {
                final xyStr = res['PointLower'][i].split(',');
                lowerPoints.add(Offset(
                    (double.parse(xyStr[0]) + imageLeftTopPoint.x) * imageScale,
                    (double.parse(xyStr[1]) + imageLeftTopPoint.y) *
                        imageScale));
              }
              for (var i = 0; i < res['PointUpper'].length; i++) {
                final xyStr = res['PointUpper'][i].split(',');
                upperPoints.add(Offset(
                    (double.parse(xyStr[0]) + imageLeftTopPoint.x) * imageScale,
                    (double.parse(xyStr[1]) + imageLeftTopPoint.y) *
                        imageScale));
              }
              ref.feature!.offsetsList.add(lowerPoints);
              ref.feature!.offsetsList.add(upperPoints);
            } else {
              description = "Ant.CCA IMT\n Measure failed";
            }
            outputs.add(outputItem);
            outputs.last.updateDescription(description: description);

            /// [Carotid] ✅在此处通知canvas 重绘结果

            ref.application.updateRenderReady.emit(this, null);
          },
        ],
      );
    } catch (e) {
      outputs.add(outputItem);
      outputs.last
          .updateDescription(description: "Ant.CCA IMT\n Measure failed");
      print(e);
    }
  }
}