3 files changed, 14 insertions, 0 deletions
diff --git a/src/widgets/styles/qcommonstyle.cpp b/src/widgets/styles/qcommonstyle.cpp
index 6b8cba1b18..29df1c6387 100644
--- a/src/widgets/styles/qcommonstyle.cpp
+++ b/src/widgets/styles/qcommonstyle.cpp
@@ -4592,6 +4592,12 @@ int QCommonStyle::pixelMetric(PixelMetric m, const QStyleOption *opt, const QWid
     case PM_HeaderGripMargin:
         ret = int(QStyleHelper::dpiScaled(4.));
         break;
+    case PM_HeaderDefaultSectionSizeHorizontal:
+        ret = int(QStyleHelper::dpiScaled(100.));
+        break;
+    case PM_HeaderDefaultSectionSizeVertical:
+        ret = int(QStyleHelper::dpiScaled(30.));
+        break;
     case PM_TabBarScrollButtonWidth:
         ret = int(QStyleHelper::dpiScaled(16.));
         break;
diff --git a/src/widgets/styles/qstyle.cpp b/src/widgets/styles/qstyle.cpp
index 2d5f676b65..5999ba5431 100644
--- a/src/widgets/styles/qstyle.cpp
+++ b/src/widgets/styles/qstyle.cpp
@@ -1472,6 +1472,11 @@ void QStyle::drawItemPixmap(QPainter *painter, const QRect &rect, int alignment,
     \value PM_TreeViewIndentation The indentation of items in a tree view.
            This enum value has been introduced in Qt 5.4.
 
+    \value PM_HeaderDefaultSectionSizeHorizontal The default size of sections
+           in a horizontal header. This enum value has been introduced in Qt 5.5.
+    \value PM_HeaderDefaultSectionSizeVertical The default size of sections
+           in a vertical header. This enum value has been introduced in Qt 5.5.
+
     \value PM_CustomBase Base value for custom pixel metrics.  Custom
     values must be greater than this value.
 
diff --git a/src/widgets/styles/qstyle.h b/src/widgets/styles/qstyle.h
index fa15a0d4c4..225146c5bb 100644
--- a/src/widgets/styles/qstyle.h
+++ b/src/widgets/styles/qstyle.h
@@ -550,6 +550,9 @@ public:
         PM_SubMenuOverlap,
         PM_TreeViewIndentation,
 
+        PM_HeaderDefaultSectionSizeHorizontal,
+        PM_HeaderDefaultSectionSizeVertical,
+
         // do not add any values below/greater than this
         PM_CustomBase = 0xf0000000
     };