diff --git a/Canvas.cpp b/Canvas.cpp
index b0b61dc..18ec9d8 100644
--- a/Canvas.cpp
+++ b/Canvas.cpp
@@ -7,7 +7,7 @@ static double dist_P2P(QPointF p1, QPointF p2) {
 template <typename T, typename A, typename B>
 T makeOrderedPair(A* obj1, B* obj2)
 {
-	return (obj1->get_tag() < obj2->get_tag()) ? std::make_pair(obj1, obj2) : std::make_pair(obj2, obj1);
+	return (obj1 < obj2) ? std::make_pair(obj1, obj2) : std::make_pair(obj2, obj1);
 }
 
 void Canvas::changeMode(Mode _mode)
@@ -46,9 +46,18 @@ bool Canvas::areCoincident(Point* p1, Point* p2)
 	return P2Ppairs.count(makeOrderedPair<PointPair>(p1, p2));
 }
 
+// False - Horizonta, True - Vertical
+bool Canvas::areHorizontalVertical(Point* p1, Point* p2, bool mode)
+{
+	if (!mode)
+		return HORIZ_pairs.count(makeOrderedPair<PointPair>(p1, p2));
+	else 
+		return VERT_pairs.count(makeOrderedPair<PointPair>(p1, p2));
+}
+
 bool Canvas::areAlreadyParallel(Line* l1, Line* l2)
 {
-	return parallelPairs.count(makeOrderedPair<LinePair>(l1, l2)) > 0;
+	return parallelPairs.count(makeOrderedPair<LinePair>(l1, l2));
 }
 
 void Canvas::mousePressEvent(QMouseEvent* event)
@@ -71,10 +80,14 @@ void Canvas::mousePressEvent(QMouseEvent* event)
 		Line* found = findAt(scene);
 
 		if (found) {
-			if (mode == Mode::Horizontal)
+			if (mode == Mode::Horizontal) {
 				sys.addConstraintHorizontal(*found, constraints_count++);
-			else
+				HORIZ_pairs.insert(makeOrderedPair<PointPair>(found->start_ref, found->end_ref));
+			}
+			else {
 				sys.addConstraintVertical(*found, constraints_count++);
+				VERT_pairs.insert(makeOrderedPair<PointPair>(found->start_ref, found->end_ref));
+			}
 			update();
 		}
 		mode = Mode::None;
@@ -244,6 +257,12 @@ void Canvas::mouseMoveEvent(QMouseEvent* event)
 				*pair->x = pos.x();
 				*pair->y = pos.y();
 			}
+			if (areHorizontalVertical(draggedPoint, pair, true)) {
+				*pair->x = pos.x();
+			}
+			if (areHorizontalVertical(draggedPoint, pair, false)) {
+				*pair->y = pos.y();
+			}
 		}
 		*draggedPoint->x = pos.x();
 		*draggedPoint->y = pos.y();
@@ -311,18 +330,10 @@ void Canvas::paintEvent(QPaintEvent*)
 
 	// === Текущая рисуемая линия (DrawingLine) ===
 	if (current_line && mode == Mode::DrawingLine) {
-		QPen pen(Qt::blue, 3, Qt::DashLine);
-		p.setPen(pen);
-		p.setBrush(Qt::transparent);
-
-		p.drawLine(QPointF(*current_line->p1.x, *current_line->p1.y),
-			QPointF(*current_line->p2.x, *current_line->p2.y));
-
 		// Концы текущей линии — синие точки
 		p.setBrush(Qt::blue);
 		p.setPen(Qt::NoPen);
 		p.drawEllipse(QPointF(*current_line->p1.x, *current_line->p1.y), 6, 6);
-		p.drawEllipse(QPointF(*current_line->p2.x, *current_line->p2.y), 6, 6);
 	}
 }
 
diff --git a/Canvas.h b/Canvas.h
index ca234c9..9c2cf16 100644
--- a/Canvas.h
+++ b/Canvas.h
@@ -53,6 +53,7 @@ private:
     Line* findAt(QPointF&);                    // ищет линию под курсором
     Point* findPointAt(QPointF, qreal tolerance = 5.0);
     bool areCoincident(Point*, Point*);
+    bool areHorizontalVertical(Point*, Point*, bool);
     // ====================== Параллельность ======================
     bool areAlreadyParallel(Line* l1, Line* l2);           // проверка на дубликат
 
@@ -68,6 +69,8 @@ private:
 
     std::set<LinePair> parallelPairs;           // уже запараллеленные пары (защита от дублей)
     std::set<PointPair> P2Ppairs;
+    std::set<PointPair> HORIZ_pairs;
+    std::set<PointPair> VERT_pairs;
 
     Line* current_line{ nullptr };
     Point* firstPoint{ nullptr };