Qt 6 works on Windows host

libs/blockview/blockview.cpp

@@ -795,6 +795,9 @@ void BlockView::keyReleaseEvent(QKeyEvent * e) {
 void BlockView::resizeEvent(QResizeEvent * event) {
 	QGraphicsView::resizeEvent(event);
 	thick = lineThickness(this);
+#if QT_VERSION_MAJOR >= 6
+	thick *= devicePixelRatioF();
+#endif
 	adjustThumb();
 	updateNavRect();
 	nav_target = _nav();