diff --git a/src/common/QskBoxBorderMetrics.h b/src/common/QskBoxBorderMetrics.h
index 2dd830a1..0c6ab370 100644
--- a/src/common/QskBoxBorderMetrics.h
+++ b/src/common/QskBoxBorderMetrics.h
@@ -19,9 +19,11 @@ class QVariant;
 class QSK_EXPORT QskBoxBorderMetrics
 {
 public:
-    QskBoxBorderMetrics();
-    QskBoxBorderMetrics( qreal width, Qt::SizeMode = Qt::AbsoluteSize );
-    QskBoxBorderMetrics( const QskMargins& widths, Qt::SizeMode sizeMode = Qt::AbsoluteSize );
+    constexpr QskBoxBorderMetrics();
+    constexpr QskBoxBorderMetrics( qreal width, Qt::SizeMode = Qt::AbsoluteSize );
+    constexpr QskBoxBorderMetrics( qreal left, qreal top,
+        qreal right, qreal bottom, Qt::SizeMode = Qt::AbsoluteSize );
+    constexpr QskBoxBorderMetrics( const QskMargins& widths, Qt::SizeMode sizeMode = Qt::AbsoluteSize );
 
     ~QskBoxBorderMetrics();
 
@@ -52,24 +54,31 @@ private:
     Qt::SizeMode m_sizeMode : 2;
 };
 
-inline QskBoxBorderMetrics::QskBoxBorderMetrics():
+inline constexpr QskBoxBorderMetrics::QskBoxBorderMetrics():
     m_sizeMode( Qt::AbsoluteSize )
 {
 }
 
-inline QskBoxBorderMetrics::QskBoxBorderMetrics( qreal width, Qt::SizeMode sizeMode ):
+inline constexpr QskBoxBorderMetrics::QskBoxBorderMetrics( qreal width, Qt::SizeMode sizeMode ):
     m_widths( width ),
     m_sizeMode( sizeMode )
 {
 }
 
-inline QskBoxBorderMetrics::QskBoxBorderMetrics(
+inline constexpr QskBoxBorderMetrics::QskBoxBorderMetrics(
         const QskMargins& widths, Qt::SizeMode sizeMode ):
     m_widths( widths ),
     m_sizeMode( sizeMode )
 {
 }
 
+inline constexpr QskBoxBorderMetrics::QskBoxBorderMetrics( qreal left, qreal top,
+        qreal right, qreal bottom, Qt::SizeMode sizeMode ):
+    m_widths( left, top, right, bottom ),
+    m_sizeMode( sizeMode )
+{
+}
+
 inline bool QskBoxBorderMetrics::operator!=( const QskBoxBorderMetrics& other ) const
 {
     return !( *this == other );
diff --git a/src/common/QskBoxShapeMetrics.h b/src/common/QskBoxShapeMetrics.h
index e2e82ddd..78c0a8c4 100644
--- a/src/common/QskBoxShapeMetrics.h
+++ b/src/common/QskBoxShapeMetrics.h
@@ -19,7 +19,10 @@ class QMarginsF;
 class QSK_EXPORT QskBoxShapeMetrics
 {
 public:
-    QskBoxShapeMetrics();
+    constexpr QskBoxShapeMetrics();
+    constexpr QskBoxShapeMetrics( qreal topLeft, qreal topRight,
+        qreal bottomLeft, qreal bottomRight, Qt::SizeMode = Qt::AbsoluteSize );
+
     QskBoxShapeMetrics( qreal radius, Qt::SizeMode = Qt::AbsoluteSize );
     QskBoxShapeMetrics( qreal radiusX, qreal radiusY, Qt::SizeMode = Qt::AbsoluteSize );
 
@@ -72,9 +75,10 @@ public:
         const QskBoxShapeMetrics&, qreal progress );
 
 private:
-    QskBoxShapeMetrics( Qt::SizeMode sizeMode, const QSizeF radii[4] ):
+    inline constexpr QskBoxShapeMetrics( Qt::SizeMode sizeMode, const QSizeF radii[4] ):
         m_radii( { radii[0], radii[1], radii[2], radii[3] } ),
-        m_sizeMode( sizeMode )
+        m_sizeMode( sizeMode ),
+        m_aspectRatioMode( Qt::KeepAspectRatio )
     {
     }
 
@@ -83,9 +87,10 @@ private:
     Qt::AspectRatioMode m_aspectRatioMode : 2;
 };
 
-inline QskBoxShapeMetrics::QskBoxShapeMetrics():
+inline constexpr QskBoxShapeMetrics::QskBoxShapeMetrics():
     m_radii( { { 0.0, 0.0 }, { 0.0, 0.0 }, { 0.0, 0.0 }, { 0.0, 0.0 } } ),
-    m_sizeMode( Qt::AbsoluteSize )
+    m_sizeMode( Qt::AbsoluteSize ),
+    m_aspectRatioMode( Qt::KeepAspectRatio )
 {
 }
 
@@ -94,6 +99,15 @@ inline QskBoxShapeMetrics::QskBoxShapeMetrics( qreal radius, Qt::SizeMode sizeMo
 {
 }
 
+inline constexpr QskBoxShapeMetrics::QskBoxShapeMetrics( qreal topLeft, qreal topRight,
+        qreal bottomLeft, qreal bottomRight, Qt::SizeMode sizeMode ):
+    m_radii( { { topLeft, topLeft }, { topRight, topRight },
+        { bottomLeft, bottomLeft }, { bottomRight, bottomRight } } ),
+    m_sizeMode( sizeMode ),
+    m_aspectRatioMode( Qt::KeepAspectRatio )
+{
+}
+
 inline bool QskBoxShapeMetrics::operator!=( const QskBoxShapeMetrics& other ) const
 {
     return !( *this == other );