Fix: style sheet styling of background of triangular QTabWidget tabs

The triangular tab shape is not reproducible with setting style border
options, so it should be painted with the usual code path, also when a
custom background has been set.

Fixes: QTBUG-72096
Change-Id: I7bc1c0579386b8ea7266ce6456534c2519d9addf
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/widgets/styles/qstylesheetstyle.cpp b/src/widgets/styles/qstylesheetstyle.cpp
index fc4efa18fb..2118bad9d6 100644
--- a/src/widgets/styles/qstylesheetstyle.cpp
+++ b/src/widgets/styles/qstylesheetstyle.cpp
@@ -4165,12 +4165,12 @@ void QStyleSheetStyle::drawControl(ControlElement ce, const QStyleOption *opt, Q
         if (const QStyleOptionTab *tab = qstyleoption_cast<const QStyleOptionTab *>(opt)) {
             QRenderRule subRule = renderRule(w, opt, PseudoElement_TabBarTab);
             QRect r = positionRect(w, subRule, PseudoElement_TabBarTab, opt->rect, opt->direction);
-            if (ce == CE_TabBarTabShape && subRule.hasDrawable()) {
+            if (ce == CE_TabBarTabShape && subRule.hasDrawable() && tab->shape < QTabBar::TriangularNorth) {
                 subRule.drawRule(p, r);
                 return;
             }
             QStyleOptionTab tabCopy(*tab);
-            subRule.configurePalette(&tabCopy.palette, QPalette::WindowText, QPalette::Window);
+            subRule.configurePalette(&tabCopy.palette, QPalette::WindowText, QPalette::Base);
             QFont oldFont = p->font();
             if (subRule.hasFont)
                 p->setFont(subRule.font);