Scalling по колесу мыши

Canvas.cpp

@@ -653,7 +653,6 @@ void Canvas::keyPressEvent(QKeyEvent* event)
         }
         break;
     }
-
     case Qt::Key_Escape: {
         // Отмена текущего действия
         if (mode == Mode::DrawingLine && current_line) {
@@ -691,7 +690,6 @@ void Canvas::keyPressEvent(QKeyEvent* event)
         }
         break;
     }
-
     case Qt::Key_Z: {
         if (constraints_count > 0) {
             remove_constraint(constraints_count - 1);
@@ -700,19 +698,22 @@ void Canvas::keyPressEvent(QKeyEvent* event)
         }
         break;
     }
-    
-    case Qt::Key_Plus:
-        zoomIn();
-        break;
-
-    case Qt::Key_Minus:
-        zoomOut();
-        break;
     default:
         QWidget::keyPressEvent(event);
     }
 }
 
+void Canvas::wheelEvent(QWheelEvent* event)
+{
+    if (event->angleDelta().y() > 0) {
+        zoomIn();
+    }
+    else {
+        zoomOut();
+    }
+    event->accept();
+}
+
 void Canvas::leaveEvent(QEvent* event)
 {
     Q_UNUSED(event);

Canvas.h

@@ -69,6 +69,7 @@ protected:
     void mousePressEvent(QMouseEvent* event) override;
     void mouseMoveEvent(QMouseEvent* event) override;
     void mouseReleaseEvent(QMouseEvent* event) override;
+    void wheelEvent(QWheelEvent* event) override;
     void paintEvent(QPaintEvent* event) override;
     void keyPressEvent(QKeyEvent* event);
     void leaveEvent(QEvent* event) override;