Merge pull request #21856 from LaurentBerger:I21853

Try to solve I21853 mouse wheel problem with GTK3

modules/highgui/src/window_gtk.cpp

@@ -1831,7 +1831,7 @@ static gboolean icvOnMouse( GtkWidget *widget, GdkEvent *event, gpointer user_da
 #if defined(GTK_VERSION3_4)
         // NOTE: in current implementation doesn't possible to put into callback function delta_x and delta_y separately
         double delta = (event->scroll.delta_x + event->scroll.delta_y);
-        cv_event   = (event->scroll.delta_y!=0) ? CV_EVENT_MOUSEHWHEEL : CV_EVENT_MOUSEWHEEL;
+        cv_event   = (event->scroll.delta_x==0) ? CV_EVENT_MOUSEWHEEL : CV_EVENT_MOUSEHWHEEL;
 #else
         cv_event = CV_EVENT_MOUSEWHEEL;
 #endif //GTK_VERSION3_4