diff --git a/designer-form/src/main/java/com/fr/design/mainframe/FormHorizontalParallelLine.java b/designer-form/src/main/java/com/fr/design/mainframe/FormHorizontalParallelLine.java
index da2671d32..f9acfcc7b 100644
--- a/designer-form/src/main/java/com/fr/design/mainframe/FormHorizontalParallelLine.java
+++ b/designer-form/src/main/java/com/fr/design/mainframe/FormHorizontalParallelLine.java
@@ -24,10 +24,10 @@ public class FormHorizontalParallelLine extends AbstractFormParallelLine {
     @Override
     public Point getExtendedLineStartPoint(AbstractFormParallelLine parallelLine) {
         Point point = new Point();
-        if (isVerticalCenterLineBeforeTheParallelLine(parallelLine)) {
-            point.setLocation(parallelLine.getStartPosition(), parallelLine.getParallelValue());
-        } else if (isVerticalCenterLineBehindTheParallelLine(parallelLine)) {
-            point.setLocation(parallelLine.getEndPosition(), parallelLine.getParallelValue());
+        if (parallelLine.isVerticalCenterLineBeforeTheParallelLine(this)) {
+            point.setLocation(getStartPosition(), getParallelValue());
+        } else if (parallelLine.isVerticalCenterLineBehindTheParallelLine(this)) {
+            point.setLocation(getEndPosition(), getParallelValue());
         }
         return point;
     }
@@ -35,10 +35,10 @@ public class FormHorizontalParallelLine extends AbstractFormParallelLine {
     @Override
     public Point getExtendedLineEndPoint(AbstractFormParallelLine parallelLine) {
         Point point = new Point();
-        if (isVerticalCenterLineBeforeTheParallelLine(parallelLine)) {
-            point.setLocation(getStartPosition(), parallelLine.getParallelValue());
-        } else if (isVerticalCenterLineBehindTheParallelLine(parallelLine)) {
-            point.setLocation(getEndPosition(), parallelLine.getParallelValue());
+        if (parallelLine.isVerticalCenterLineBeforeTheParallelLine(this)) {
+            point.setLocation(parallelLine.getStartPosition(), getParallelValue());
+        } else if (parallelLine.isVerticalCenterLineBehindTheParallelLine(this)) {
+            point.setLocation(parallelLine.getEndPosition(), getParallelValue());
         }
         return point;
     }
diff --git a/designer-form/src/main/java/com/fr/design/mainframe/FormSpacingLineDrawer.java b/designer-form/src/main/java/com/fr/design/mainframe/FormSpacingLineDrawer.java
index 0b92efc16..a46a59af4 100644
--- a/designer-form/src/main/java/com/fr/design/mainframe/FormSpacingLineDrawer.java
+++ b/designer-form/src/main/java/com/fr/design/mainframe/FormSpacingLineDrawer.java
@@ -91,10 +91,10 @@ public class FormSpacingLineDrawer {
 
     private void drawExtendedLine(Graphics g, AbstractFormParallelLine[] nearestSides) {
         if (isNeedExtendedLine(nearestSides)) {
-            int startX = (int) nearestSides[0].getExtendedLineStartPoint(nearestSides[1]).getX();
-            int startY = (int) nearestSides[0].getExtendedLineStartPoint(nearestSides[1]).getY();
-            int endX = (int) nearestSides[0].getExtendedLineEndPoint(nearestSides[1]).getX();
-            int endY = (int) nearestSides[0].getExtendedLineEndPoint(nearestSides[1]).getY();
+            int startX = (int) nearestSides[1].getExtendedLineStartPoint(nearestSides[0]).getX();
+            int startY = (int) nearestSides[1].getExtendedLineStartPoint(nearestSides[0]).getY();
+            int endX = (int) nearestSides[1].getExtendedLineEndPoint(nearestSides[0]).getX();
+            int endY = (int) nearestSides[1].getExtendedLineEndPoint(nearestSides[0]).getY();
             drawExtendedLine(g, startX, startY, endX, endY);
         }
     }
diff --git a/designer-form/src/main/java/com/fr/design/mainframe/FormVerticalParallelLine.java b/designer-form/src/main/java/com/fr/design/mainframe/FormVerticalParallelLine.java
index e99cdd207..19028bc25 100644
--- a/designer-form/src/main/java/com/fr/design/mainframe/FormVerticalParallelLine.java
+++ b/designer-form/src/main/java/com/fr/design/mainframe/FormVerticalParallelLine.java
@@ -24,10 +24,10 @@ public class FormVerticalParallelLine extends AbstractFormParallelLine {
     @Override
     public Point getExtendedLineStartPoint(AbstractFormParallelLine parallelLine) {
         Point point = new Point();
-        if (isVerticalCenterLineBeforeTheParallelLine(parallelLine)) {
-            point.setLocation(parallelLine.getParallelValue(), parallelLine.getStartPosition());
-        } else if (isVerticalCenterLineBehindTheParallelLine(parallelLine)) {
-            point.setLocation(parallelLine.getParallelValue(), parallelLine.getEndPosition());
+        if (parallelLine.isVerticalCenterLineBeforeTheParallelLine(this)) {
+            point.setLocation(getParallelValue(), getStartPosition());
+        } else if (parallelLine.isVerticalCenterLineBehindTheParallelLine(this)) {
+            point.setLocation(getParallelValue(), getEndPosition());
         }
         return point;
     }
@@ -35,10 +35,10 @@ public class FormVerticalParallelLine extends AbstractFormParallelLine {
     @Override
     public Point getExtendedLineEndPoint(AbstractFormParallelLine parallelLine) {
         Point point = new Point();
-        if (isVerticalCenterLineBeforeTheParallelLine(parallelLine)) {
-            point.setLocation(parallelLine.getParallelValue(), getStartPosition());
-        } else if (isVerticalCenterLineBehindTheParallelLine(parallelLine)) {
-            point.setLocation(parallelLine.getParallelValue(), getEndPosition());
+        if (parallelLine.isVerticalCenterLineBeforeTheParallelLine(this)) {
+            point.setLocation(getParallelValue(), parallelLine.getStartPosition());
+        } else if (parallelLine.isVerticalCenterLineBehindTheParallelLine(this)) {
+            point.setLocation(getParallelValue(), parallelLine.getEndPosition());
         }
         return point;
     }