2 files changed, 88 insertions, 1 deletions
diff --git a/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp b/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
index d8bb34933a..32437050f5 100644
--- a/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
+++ b/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
@@ -167,6 +167,7 @@ private slots:
     void task_QTBUG_52027_mapCompleterIndex();
     void checkMenuItemPosWhenStyleSheetIsSet();
     void checkEmbeddedLineEditWhenStyleSheetIsSet();
+    void propagateStyleChanges();
 
 private:
     PlatformInputContext m_platformInputContext;
@@ -3586,5 +3587,50 @@ void tst_QComboBox::checkEmbeddedLineEditWhenStyleSheetIsSet()
     qApp->setStyleSheet(oldCss);
 }
 
+/*!
+    Tests that the style-based frame style propagates to the internal container
+    widget of QComboBox when the style changes by verifying that the respective
+    styleHint is asked for when the style changes.
+
+    See QTBUG-92488
+*/
+void tst_QComboBox::propagateStyleChanges()
+{
+    class FrameStyle : public QProxyStyle
+    {
+    public:
+        FrameStyle(int frameStyle, QStyle *style = nullptr)
+            : QProxyStyle(style), frameStyle(frameStyle)
+        {}
+
+        int styleHint(QStyle::StyleHint hint, const QStyleOption *opt,
+                      const QWidget *widget, QStyleHintReturn *returnData) const
+        {
+            if (hint == QStyle::SH_ComboBox_PopupFrameStyle) {
+                inquired = true;
+                return frameStyle;
+            }
+            return QProxyStyle::styleHint(hint, opt, widget, returnData);
+        }
+
+        int frameStyle;
+        mutable bool inquired = false;
+    };
+
+    FrameStyle framelessStyle(QFrame::NoFrame);
+    FrameStyle frameStyle(QFrame::Plain | QFrame::Sunken);
+
+    QComboBox combo;
+    // container will be created and take settings from this style
+    combo.setStyle(&framelessStyle);
+    QVERIFY(framelessStyle.inquired);
+    combo.addItem(QLatin1String("Open"));
+    combo.addItem(QLatin1String("Close"));
+    // needed because of QComboBox's adjustSizeTimer not doing anything otherwise
+    combo.setSizeAdjustPolicy(QComboBox::AdjustToContents);
+    combo.setStyle(&frameStyle);
+    QVERIFY(frameStyle.inquired);
+}
+
 QTEST_MAIN(tst_QComboBox)
 #include "tst_qcombobox.moc"
diff --git a/tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp b/tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp
index e3b046e448..91bc638257 100644
--- a/tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp
+++ b/tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp
@@ -1,4 +1,4 @@
-/****************************************************************************
+/****************************************************************************
 **
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
@@ -282,6 +282,8 @@ private slots:
     void nativeSubWindows();
     void task_209615();
     void task_236750();
+    void qtbug92240_title_data();
+    void qtbug92240_title();
 
 private:
     QMdiSubWindow *activeWindow;
@@ -2749,6 +2751,45 @@ void tst_QMdiArea::task_236750()
     subWindow->showMinimized();
 }
 
+// QTBUG-92240: When subwindows are maximized, their title is supposed to
+// appear on the main window. When DontMaximizeSubWindowOnActivation was set,
+// titles of previously created maximized windows interfered, resulting in
+// "QTBUG-92240 - [1] - [2]".
+void tst_QMdiArea::qtbug92240_title_data()
+{
+    QTest::addColumn<bool>("dontMaximize");
+    QTest::newRow("default") << false;
+    QTest::newRow("dontMaximize") << true;
+}
+
+void tst_QMdiArea::qtbug92240_title()
+{
+    QFETCH(bool, dontMaximize);
+
+#ifdef Q_OS_MACOS
+    QSKIP("Not supported on macOS");
+#endif
+
+    QMainWindow w;
+    const QString title = QStringLiteral("QTBUG-92240");
+    w.setWindowTitle(title);
+    w.menuBar()->addMenu(QStringLiteral("File"));
+    w.show();
+
+    auto *mdiArea = new QMdiArea;
+    w.setCentralWidget(mdiArea);
+    if (dontMaximize)
+        mdiArea->setOption(QMdiArea::DontMaximizeSubWindowOnActivation);
+    auto *sw1 = mdiArea->addSubWindow(new QWidget);
+    sw1->setWindowTitle(QStringLiteral("1"));
+    sw1->showMaximized();
+    QTRY_COMPARE(w.windowTitle(), QLatin1String("QTBUG-92240 - [1]"));
+    auto *sw2 = mdiArea->addSubWindow(new QWidget);
+    sw2->setWindowTitle(QStringLiteral("2"));
+    sw2->showMaximized();
+    QTRY_COMPARE(w.windowTitle(), QLatin1String("QTBUG-92240 - [2]"));
+}
+
 QTEST_MAIN(tst_QMdiArea)
 #include "tst_qmdiarea.moc"