Make sure there's a scene before using it

Fixes crash hovering links in quassel

Task-number: QTBUG-44509
Change-Id: I77d8d9118ad185ed70a46e91445e2960200e562b
Reviewed-by: Michael Brüning <michael.bruning@theqtcompany.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@theqtcompany.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp b/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
index 5aea845f90..3913f204ba 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
@@ -175,6 +175,7 @@ private slots:
     void windowFrameMargins();
     void QTBUG_6986_sendMouseEventToAlienWidget();
     void mapToGlobal();
+    void mapToGlobalWithoutScene();
     void QTBUG_43780_visibility();
 };
 
@@ -3690,6 +3691,16 @@ void tst_QGraphicsProxyWidget::mapToGlobal() // QTBUG-41135
                         .arg(embeddedCenterGlobal.x()).arg(embeddedCenterGlobal.y())));
 }
 
+void tst_QGraphicsProxyWidget::mapToGlobalWithoutScene() // QTBUG-44509
+{
+    QGraphicsProxyWidget proxyWidget;
+    QWidget *embeddedWidget = new QWidget;
+    proxyWidget.setWidget(embeddedWidget);
+    const QPoint localPos(0, 0);
+    const QPoint globalPos = embeddedWidget->mapToGlobal(localPos);
+    QCOMPARE(embeddedWidget->mapFromGlobal(globalPos), localPos);
+}
+
 // QTBUG_43780: Embedded widgets have isWindow()==true but showing them should not
 // trigger the top-level widget code path of show() that closes all popups
 // (for example combo popups).