Tabs with corner widgets are drawn incorrectly in document mode on Mac.

While drawing the tabbar frame, mac style needs the QTabBar pointer to
calculate the correct size.
Since the QTabWidget also uses the PE_FrameTabBarBase to draw background
of the corner widgets, the mac style has to use position passed with the
style option. This only works with horizontal tabs.

Reviewed-by: Jens Bache-Wiig

1 files changed, 2 insertions, 2 deletions

diff --git a/src/gui/widgets/qtabwidget.cpp b/src/gui/widgets/qtabwidget.cpp
index 9aeb033..0c89a72 100644
--- a/src/gui/widgets/qtabwidget.cpp
+++ b/src/gui/widgets/qtabwidget.cpp
@@ -1167,8 +1167,8 @@ void QTabWidget::tabRemoved(int index)
 void QTabWidget::paintEvent(QPaintEvent *)
 {
     Q_D(QTabWidget);
-    QStylePainter p(this);
     if (documentMode()) {
+        QStylePainter p(this, tabBar());
         if (QWidget *w = cornerWidget(Qt::TopLeftCorner)) {
             QStyleOptionTabBarBaseV2 opt;
             QTabBarPrivate::initStyleBaseOption(&opt, tabBar(), w->size());
@@ -1185,7 +1185,7 @@ void QTabWidget::paintEvent(QPaintEvent *)
         }
         return;
     }
-
+    QStylePainter p(this);
     QStyleOptionTabWidgetFrame opt;
     initStyleOption(&opt);
     opt.rect = d->panelRect;