Fix regression where QMacStyle would only draw tabs w/QStyleOptionTabV3.

This is a good example of how to not use QStyleOption when added new
features. It's important to start with the most compatible and then cast
to the more specific versions to get the new fields.

Task-number: 248769
Reviewed-by: Jens Bache-Wiig

1 files changed, 10 insertions, 7 deletions

diff --git a/src/gui/styles/qmacstyle_mac.mm b/src/gui/styles/qmacstyle_mac.mm
index a3f5cfe..d598807 100644
--- a/src/gui/styles/qmacstyle_mac.mm
+++ b/src/gui/styles/qmacstyle_mac.mm
@@ -3854,13 +3854,16 @@ void QMacStyle::drawControl(ControlElement ce, const QStyleOption *opt, QPainter
         }
         break;
     case CE_TabBarTabShape:
-        if (const QStyleOptionTabV3 *tabOpt = qstyleoption_cast<const QStyleOptionTabV3 *>(opt)) {
-            if (tabOpt->documentMode) {
-                p->save();
-                QRect tabRect = tabOpt->rect;
-                drawTabShape(p, tabOpt);
-                p->restore();
-                return;
+        if (const QStyleOptionTab *tabOpt = qstyleoption_cast<const QStyleOptionTab *>(opt)) {
+
+            if (const QStyleOptionTabV3 *tabOptV3 = qstyleoption_cast<const QStyleOptionTabV3 *>(opt)) {
+                if (tabOptV3->documentMode) {
+                    p->save();
+                    QRect tabRect = tabOptV3->rect;
+                    drawTabShape(p, tabOptV3);
+                    p->restore();
+                    return;
+                }
             }
 
 #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4)