1 files changed, 16 insertions, 3 deletions
diff --git a/src/gui/widgets/qtabbar.cpp b/src/gui/widgets/qtabbar.cpp
index d03a2f4..8aaaade 100644
--- a/src/gui/widgets/qtabbar.cpp
+++ b/src/gui/widgets/qtabbar.cpp
@@ -69,6 +69,7 @@
 
 QT_BEGIN_NAMESPACE
 
+
 inline static bool verticalTabs(QTabBar::Shape shape)
 {
     return shape == QTabBar::RoundedWest
@@ -95,9 +96,20 @@ void QTabBarPrivate::updateMacBorderMetrics()
         metrics.left = 0;
         metrics.right = 0;
         qt_mac_updateContentBorderMetricts(window, metrics);
-        
-        // hide the base line separator if the tabs have docuemnt mode enabled (Cocoa)
-        qt_mac_showBaseLineSeparator(window, !documentMode);
+#if QT_MAC_USE_COCOA
+        // In Cocoa we need to keep track of the drawRect method.
+        // If documentMode is enabled we need to change it, unless
+        // a toolbar is present.
+        // Notice that all the information is kept in the window,
+        // that's why we get the private widget for it instead of
+        // the private widget for this widget.
+        QWidgetPrivate *privateWidget = qt_widget_private(q->window());
+        if(privateWidget)
+            privateWidget->changeMethods = documentMode;
+        // Since in Cocoa there is no simple way to remove the baseline, so we just ask the
+        // top level to do the magic for us.
+        privateWidget->syncUnifiedMode();
+#endif // QT_MAC_USE_COCOA
     }
 #endif
 }
@@ -2193,6 +2205,7 @@ bool QTabBar::documentMode() const
 void QTabBar::setDocumentMode(bool enabled)
 {
     Q_D(QTabBar);
+
     d->documentMode = enabled;
     d->updateMacBorderMetrics();
 }