Designer: Hide children's selection handles while D'n'D of hierarchy

Fixes: QTBUG-75916
Change-Id: I25658791292039439eb26a5a3963a3408b71bccc
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/designer/src/components/formeditor/formwindow.cpp b/src/designer/src/components/formeditor/formwindow.cpp
index 464d7f618..cc0f78e38 100644
--- a/src/designer/src/components/formeditor/formwindow.cpp
+++ b/src/designer/src/components/formeditor/formwindow.cpp
@@ -684,6 +684,7 @@ bool FormWindow::handleMouseMoveEvent(QWidget *, QWidget *, QMouseEvent *e)
     const bool blocked = blockSelectionChanged(true);
 
     QWidgetList sel = selectedWidgets();
+    const QWidgetList originalSelection = sel;
     simplifySelection(&sel);
 
     QSet<QWidget*> widget_set;
@@ -733,6 +734,11 @@ bool FormWindow::handleMouseMoveEvent(QWidget *, QWidget *, QMouseEvent *e)
         }
     }
 
+    // In case when we have reduced the selection (by calling simplifySelection()
+    // beforehand) we still need to hide selection handles for children widgets
+    for (auto *widget : originalSelection)
+        m_selection->hide(widget);
+
     blockSelectionChanged(blocked);
 
     if (!sel.empty()) // reshow selection?