fix 18979: 【图像测量】【小动物】LV study测量项测量时，同一组计算项没有在同一纵轴线，可移动横向位置；需和超声机保持一致，限制在同一纵轴线

lib/process/items/top_item.dart

@@ -65,7 +65,6 @@ abstract class TopMeasureItem<T extends MeasureItemFeature>
   @override
   void switchChild(int index) {
     if (index == _childIndex) return;
-    print('switchChild: $index');
     _childIndex = index;
     if (workingChild.measuredFeatures.isNotEmpty) {
       isNeedRedraw = true;

lib/process/primitives/combos/lv_study.dart

@@ -5,7 +5,9 @@ import 'package:fis_measure/interfaces/process/items/item_metas.dart';
 import 'package:fis_measure/interfaces/process/items/terms.dart';
 import 'package:fis_measure/interfaces/process/items/types.dart';
 import 'package:fis_measure/interfaces/process/workspace/point_info.dart';
+import 'package:fis_measure/process/calcuators/distance.dart';
 import 'package:fis_measure/process/calcuators/lv_study.dart';
+import 'package:fis_measure/process/calcuators/time_motion.dart';
 import 'package:fis_measure/process/items/top_item.dart';
 import 'package:fis_measure/process/items/top_item_feature.dart';
 import 'package:fis_measure/process/primitives/straightline.dart';
@@ -35,14 +37,19 @@ class LvStudy extends TopMeasureItem<StraightLineGroupFeature> {
   LvStudy(ItemMeta meta, {this.ifVertical = false, this.ifTimeSpan = false})
       : super(meta) {
     for (final childMeta in meta.childItems) {
-      StraightLine childItem;
+      _LvStudyStraightLine childItem;
       if (childMeta.measureType == "VerticalDistance") {
         // measureType
-        childItem = StraightLine.createVerticalDistance(childMeta, this);
+        // childItem = StraightLine.createVerticalDistance(childMeta, this);
+        childItem = _LvStudyStraightLine(childMeta, this);
+        childItem.calculator = VerticalDistanceCal(childItem);
+        childItem.ifVertical = true;
       } else if (ifTimeSpan) {
-        childItem = StraightLine.createTimeSpan(childMeta, this);
+        childItem = _LvStudyStraightLine(childMeta, this);
+        childItem.calculator = TimeSpanCal(childItem);
       } else {
-        childItem = StraightLine.createDistance(childMeta, this);
+        childItem = _LvStudyStraightLine(childMeta, this);
+        childItem.calculator = DistanceCal(childItem);
       }
       childItems.add(childItem);
 
@@ -97,11 +104,11 @@ class LvStudy extends TopMeasureItem<StraightLineGroupFeature> {
   }
 
   void _onWorkingChildChanged(_, int e) {
-    final isMBelow =
-        ["m", "pw"].contains(application.currentMode.name.toLowerCase());
-    if (!isMBelow) {
-      return;
-    }
+    // final isMBelow =
+    //     ["m", "pw"].contains(application.currentMode.name.toLowerCase());
+    // if (!isMBelow) {
+    //   return;
+    // }
 
     if (_lastChild != null) {
       _lastChild!.onItemStatesChanged.removeListener(_onChildItemStatesChanged);
@@ -109,13 +116,14 @@ class LvStudy extends TopMeasureItem<StraightLineGroupFeature> {
     workingChild.onItemStatesChanged.addListener(_onChildItemStatesChanged);
     _lastChild = workingChild;
 
-    final childItem = workingChild as StraightLine;
+    final childItem = workingChild as _LvStudyStraightLine;
     if (_dChildItems.contains(childItem)) {
       final point = _findDPoint(childItem);
       if (point != null) {
         final offset = point.toOffset();
         final pointInfo = PointInfo.fromOffset(offset, PointInfoType.mouseDown);
         pointInfo.hostVisualArea = application.currentVisualArea;
+        childItem.refPoint = pointInfo;
         childItem.execute(pointInfo);
       }
     }
@@ -125,6 +133,7 @@ class LvStudy extends TopMeasureItem<StraightLineGroupFeature> {
         final offset = point.toOffset();
         final pointInfo = PointInfo.fromOffset(offset, PointInfoType.mouseDown);
         pointInfo.hostVisualArea = application.currentVisualArea;
+        childItem.refPoint = pointInfo;
         childItem.execute(pointInfo);
       }
     }
@@ -145,7 +154,7 @@ class LvStudy extends TopMeasureItem<StraightLineGroupFeature> {
   }
 
   void _onChildItemMeasured() {
-    final childItem = workingChild as StraightLine;
+    final childItem = workingChild as _LvStudyStraightLine;
     if (_dChildItems.contains(childItem)) {
       _handleDChildMeasured(childItem);
     }
@@ -154,20 +163,21 @@ class LvStudy extends TopMeasureItem<StraightLineGroupFeature> {
     }
   }
 
-  void _handleDChildMeasured(StraightLine childItem) {
+  void _handleDChildMeasured(_LvStudyStraightLine childItem) {
     childItem.changeCrossIndicatorStyle(CrossIndicatorStyle.horizontal);
   }
 
-  void _handleSChildMeasured(StraightLine childItem) {
+  void _handleSChildMeasured(_LvStudyStraightLine childItem) {
     childItem.changeCrossIndicatorStyle(CrossIndicatorStyle.horizontal);
   }
 
-  DPoint? _findDPoint(StraightLine item) =>
+  DPoint? _findDPoint(_LvStudyStraightLine item) =>
       _findPointFromItems(_dChildItems, item);
-  DPoint? _findSPoint(StraightLine item) =>
+  DPoint? _findSPoint(_LvStudyStraightLine item) =>
       _findPointFromItems(_sChildItems, item);
 
-  DPoint? _findPointFromItems(List<StraightLine> items, StraightLine currItem) {
+  DPoint? _findPointFromItems(
+      List<StraightLine> items, _LvStudyStraightLine currItem) {
     final lastIndex = workingChildIndex - 1;
     if (lastIndex < 0) {
       return null;
@@ -176,20 +186,11 @@ class LvStudy extends TopMeasureItem<StraightLineGroupFeature> {
     if (items.contains(lastItem)) {
       if (lastItem.measuredFeatures.isNotEmpty) {
         final feature = (lastItem as StraightLine).measuredFeatures.first;
-        final point = feature.endPoint;
+        final point =
+            currItem.ifVertical ? feature.startPoint : feature.endPoint;
         return point;
       }
     }
-    // for (var item in items) {
-    //   if (item == currItem) {
-    //     continue;
-    //   }
-    //   if (item.measuredFeatures.isNotEmpty) {
-    //     final feature = item.measuredFeatures.first;
-    //     final point = feature.endPoint;
-    //     return point;
-    //   }
-    // }
     return null;
   }
 }
@@ -199,3 +200,18 @@ class StraightLineGroupFeature extends TopMeasureItemFeature {
     ITopMeasureItem refItem,
   ) : super(refItem);
 }
+
+class _LvStudyStraightLine extends StraightLine {
+  _LvStudyStraightLine(super.meta, super.parent);
+
+  DPoint? refPoint;
+  bool ifVertical = false;
+
+  @override
+  bool onExecuteMouse(PointInfo args) {
+    if (ifVertical && refPoint != null) {
+      args.x = refPoint!.x;
+    }
+    return super.onExecuteMouse(args);
+  }
+}