diff --git a/src/controls/QskBoundedControl.cpp b/src/controls/QskBoundedControl.cpp
new file mode 100644
index 00000000..881f99d2
--- /dev/null
+++ b/src/controls/QskBoundedControl.cpp
@@ -0,0 +1,143 @@
+/******************************************************************************
+ * QSkinny - Copyright (C) 2016 Uwe Rathmann
+ * This file may be used under the terms of the QSkinny License, Version 1.0
+ *****************************************************************************/
+
+#include "QskBoundedControl.h"
+#include "QskFunctions.h"
+#include "QskIntervalF.h"
+
+QskBoundedControl::QskBoundedControl( QQuickItem* parent )
+    : QskBoundedControl( 0.0, 1.0, parent )
+{
+}
+
+QskBoundedControl::QskBoundedControl( qreal min, qreal max, QQuickItem* parent )
+    : QskControl( parent )
+    , m_minimum( qMin( min, max ) )
+    , m_maximum( qMax( min, max ) )
+{
+}
+
+QskBoundedControl::~QskBoundedControl()
+{
+}
+
+void QskBoundedControl::setMinimum( qreal minimum )
+{
+    if ( qskFuzzyCompare( m_minimum, minimum ) )
+        return;
+
+    m_minimum = minimum;
+    Q_EMIT minimumChanged( minimum );
+
+    if ( isComponentComplete() )
+        adjustBoundaries( false );
+
+    Q_EMIT boundariesChanged( boundaries() );
+    update();
+}
+
+qreal QskBoundedControl::minimum() const
+{
+    return m_minimum;
+}
+
+void QskBoundedControl::setMaximum( qreal maximum )
+{
+    if ( qskFuzzyCompare( m_maximum, maximum ) )
+        return;
+
+    m_maximum = maximum;
+    Q_EMIT maximumChanged( maximum );
+
+    if ( isComponentComplete() )
+        adjustBoundaries( true );
+
+    Q_EMIT boundariesChanged( boundaries() );
+    update();
+}
+
+qreal QskBoundedControl::maximum() const
+{
+    return m_maximum;
+}
+
+void QskBoundedControl::setBoundaries( qreal min, qreal max )
+{
+    if ( max < min )
+        max = min;
+
+    const auto oldMin = m_minimum;
+    const auto oldMax = m_maximum;
+
+    if ( min == oldMin && max == oldMax )
+        return;
+
+    m_minimum = min;
+    m_maximum = max;
+
+    if ( isComponentComplete() )
+        adjustBoundaries( false );
+
+    if ( m_minimum != oldMin )
+        Q_EMIT minimumChanged( m_minimum );
+
+    if ( m_maximum != oldMax )
+        Q_EMIT maximumChanged( m_maximum );
+
+    Q_EMIT boundariesChanged( boundaries() );
+    update();
+}
+
+void QskBoundedControl::setBoundaries( const QskIntervalF& boundaries )
+{
+    setBoundaries( boundaries.lowerBound(), boundaries.upperBound() );
+}
+
+QskIntervalF QskBoundedControl::boundaries() const
+{
+    return QskIntervalF( m_minimum, m_maximum );
+}
+
+void QskBoundedControl::adjustBoundaries( bool increasing )
+{
+    if ( m_maximum >= m_minimum )
+        return;
+
+    if ( increasing )
+    {
+        m_minimum = m_maximum;
+        Q_EMIT minimumChanged( m_minimum );
+    }
+    else
+    {
+        m_maximum = m_minimum;
+        Q_EMIT maximumChanged( m_maximum );
+    }
+
+    Q_EMIT boundariesChanged( boundaries() );
+}
+
+qreal QskBoundedControl::boundaryLength() const
+{
+    return m_maximum - m_minimum;
+}
+
+void QskBoundedControl::componentComplete()
+{
+    Inherited::componentComplete();
+    adjustBoundaries( true );
+}
+
+qreal QskBoundedControl::boundedValue( qreal value ) const
+{
+    return qBound( minimum(), value, maximum() );
+}
+
+qreal QskBoundedControl::valueAsRatio( qreal value ) const
+{   
+    return ( value - m_minimum ) / ( m_maximum - m_minimum );
+}
+
+#include "moc_QskBoundedControl.cpp"
diff --git a/src/controls/QskBoundedControl.h b/src/controls/QskBoundedControl.h
new file mode 100644
index 00000000..5d353020
--- /dev/null
+++ b/src/controls/QskBoundedControl.h
@@ -0,0 +1,61 @@
+/******************************************************************************
+ * QSkinny - Copyright (C) 2016 Uwe Rathmann
+ * This file may be used under the terms of the QSkinny License, Version 1.0
+ *****************************************************************************/
+
+#ifndef QSK_BOUNDED_CONTROL_H
+#define QSK_BOUNDED_CONTROL_H
+
+#include "QskControl.h"
+
+class QskIntervalF;
+
+class QSK_EXPORT QskBoundedControl : public QskControl
+{
+    Q_OBJECT
+
+    Q_PROPERTY( qreal minimum READ minimum WRITE setMinimum NOTIFY minimumChanged )
+    Q_PROPERTY( qreal maximum READ maximum WRITE setMaximum NOTIFY maximumChanged )
+    Q_PROPERTY( QskIntervalF boundaries READ boundaries
+                WRITE setBoundaries NOTIFY boundariesChanged )
+
+    using Inherited = QskControl;
+
+  public:
+    ~QskBoundedControl() override;
+
+    qreal minimum() const;
+    qreal maximum() const;
+
+    qreal boundaryLength() const;
+
+    void setBoundaries( qreal min, qreal max );
+    QskIntervalF boundaries() const;
+
+    qreal boundedValue( qreal ) const;
+    qreal valueAsRatio( qreal ) const;
+
+  public Q_SLOTS:
+    void setMinimum( qreal );
+    void setMaximum( qreal );
+    void setBoundaries( const QskIntervalF& );
+
+  Q_SIGNALS:
+    void minimumChanged( qreal );
+    void maximumChanged( qreal );
+    void boundariesChanged( const QskIntervalF&  );
+
+  protected:
+    QskBoundedControl( QQuickItem* parent = nullptr );
+    QskBoundedControl( qreal min, qreal max, QQuickItem* parent = nullptr );
+
+    void componentComplete() override;
+
+    void adjustBoundaries( bool increasing );
+
+  private:
+    qreal m_minimum;
+    qreal m_maximum;
+};
+
+#endif
diff --git a/src/controls/QskBoundedInput.cpp b/src/controls/QskBoundedInput.cpp
index 553d815d..77db2bdc 100644
--- a/src/controls/QskBoundedInput.cpp
+++ b/src/controls/QskBoundedInput.cpp
@@ -11,203 +11,90 @@
 
 QSK_SYSTEM_STATE( QskBoundedInput, ReadOnly, ( QskAspect::FirstSystemState << 1 ) )
 
-class QskBoundedInput::PrivateData
-{
-  public:
-    PrivateData()
-        : minimum( 0.0 )
-        , maximum( 1.0 )
-        , stepSize( 0.1 )
-        , pageSize( 1 )
-        , snap( false )
-    {
-    }
-
-    qreal minimum;
-    qreal maximum;
-    qreal stepSize;
-    int pageSize;
-
-    bool snap : 1;
-};
-
 QskBoundedInput::QskBoundedInput( QQuickItem* parent )
-    : QskControl( parent )
-    , m_data( new PrivateData() )
+    : Inherited( parent )
+    , m_stepSize( 0.1 )
+    , m_pageSize( 1 )
+    , m_snap( false )
 {
     setFocusPolicy( Qt::StrongFocus );
     setAcceptedMouseButtons( Qt::LeftButton );
     setWheelEnabled( true );
+
+    if ( isComponentComplete() )
+    {
+        connect( this, &QskBoundedControl::boundariesChanged,
+            this, &QskBoundedInput::alignInput );
+    }
 }
 
 QskBoundedInput::~QskBoundedInput()
 {
 }
 
-void QskBoundedInput::setMinimum( qreal minimum )
-{
-    if ( m_data->minimum == minimum )
-        return;
-
-    m_data->minimum = minimum;
-    Q_EMIT minimumChanged( minimum );
-
-    if ( isComponentComplete() )
-        adjustBoundaries( false );
-
-    Q_EMIT boundariesChanged( boundaries() );
-    update();
-}
-
-qreal QskBoundedInput::minimum() const
-{
-    return m_data->minimum;
-}
-
-void QskBoundedInput::setMaximum( qreal maximum )
-{
-    if ( m_data->maximum == maximum )
-        return;
-
-    m_data->maximum = maximum;
-    Q_EMIT maximumChanged( maximum );
-
-    if ( isComponentComplete() )
-        adjustBoundaries( true );
-
-    Q_EMIT boundariesChanged( boundaries() );
-    update();
-}
-
-qreal QskBoundedInput::maximum() const
-{
-    return m_data->maximum;
-}
-
-void QskBoundedInput::setBoundaries( qreal min, qreal max )
-{
-    if ( max < min )
-        max = min;
-
-    const auto oldMin = m_data->minimum;
-    const auto oldMax = m_data->maximum;
-
-    if ( min == oldMin && max == oldMax )
-        return;
-
-    m_data->minimum = min;
-    m_data->maximum = max;
-
-    if ( isComponentComplete() )
-        adjustBoundaries( false );
-
-    if ( m_data->minimum != oldMin )
-        Q_EMIT minimumChanged( m_data->minimum );
-
-    if ( m_data->maximum != oldMax )
-        Q_EMIT maximumChanged( m_data->maximum );
-
-    Q_EMIT boundariesChanged( boundaries() );
-    update();
-}
-
-void QskBoundedInput::setBoundaries( const QskIntervalF& boundaries )
-{
-    setBoundaries( boundaries.lowerBound(), boundaries.upperBound() );
-}
-
-QskIntervalF QskBoundedInput::boundaries() const
-{
-    return QskIntervalF( m_data->minimum, m_data->maximum );
-}
-
-void QskBoundedInput::adjustBoundaries( bool increasing )
-{
-    if ( m_data->maximum < m_data->minimum )
-    {
-        if ( increasing )
-        {
-            m_data->minimum = m_data->maximum;
-            Q_EMIT minimumChanged( m_data->minimum );
-        }
-        else
-        {
-            m_data->maximum = m_data->minimum;
-            Q_EMIT maximumChanged( m_data->maximum );
-        }
-
-        alignInput();
-    }
-}
-
-qreal QskBoundedInput::boundaryLength() const
-{
-    return m_data->maximum - m_data->minimum;
-}
-
 void QskBoundedInput::setStepSize( qreal stepSize )
 {
     if ( qFuzzyIsNull( stepSize ) )
         stepSize = 0.0;
 
-    if ( qFuzzyCompare( m_data->stepSize, stepSize ) )
+    if ( qFuzzyCompare( m_stepSize, stepSize ) )
         return;
 
-    m_data->stepSize = stepSize;
+    m_stepSize = stepSize;
     Q_EMIT stepSizeChanged( stepSize );
 
     if ( isComponentComplete() )
     {
-        if ( m_data->snap && stepSize )
+        if ( m_snap && stepSize )
             alignInput();
     }
 }
 
 qreal QskBoundedInput::stepSize() const
 {
-    return m_data->stepSize;
+    return m_stepSize;
 }
 
 void QskBoundedInput::setPageSize( int pageSize )
 {
-    if ( m_data->pageSize == pageSize )
+    if ( m_pageSize == pageSize )
         return;
 
-    m_data->pageSize = pageSize;
+    m_pageSize = pageSize;
     Q_EMIT pageSizeChanged( pageSize );
 }
 
 int QskBoundedInput::pageSize() const
 {
-    return m_data->pageSize;
+    return m_pageSize;
 }
 
 void QskBoundedInput::stepUp()
 {
-    increment( m_data->stepSize );
+    increment( m_stepSize );
 }   
 
 void QskBoundedInput::stepDown()
 {
-    increment( -m_data->stepSize );
+    increment( -m_stepSize );
 }   
     
 void QskBoundedInput::pageUp()
 {
-    increment( m_data->pageSize * m_data->stepSize );
+    increment( m_pageSize * m_stepSize );
 }   
     
 void QskBoundedInput::pageDown()
 {
-    increment( -m_data->pageSize * m_data->stepSize );
+    increment( -m_pageSize * m_stepSize );
 }
 
 void QskBoundedInput::setSnap( bool snap )
 {
-    if ( m_data->snap == snap )
+    if ( m_snap == snap )
         return;
 
-    m_data->snap = snap;
+    m_snap = snap;
     Q_EMIT snapChanged( snap );
 
     if ( isComponentComplete() && snap )
@@ -216,7 +103,18 @@ void QskBoundedInput::setSnap( bool snap )
 
 bool QskBoundedInput::snap() const
 {
-    return m_data->snap;
+    return m_snap;
+}
+
+void QskBoundedInput::componentComplete()
+{
+    if ( isComponentComplete() )
+    {
+        connect( this, &QskBoundedControl::boundariesChanged,
+            this, &QskBoundedInput::alignInput, Qt::UniqueConnection );
+    }
+
+    Inherited::componentComplete();
 }
 
 void QskBoundedInput::alignInput()
@@ -225,20 +123,20 @@ void QskBoundedInput::alignInput()
 
 qreal QskBoundedInput::alignedValue( qreal value ) const
 {
-    if ( m_data->snap )
+    if ( m_snap )
     {
-        if ( const auto step = m_data->stepSize )
+        if ( const auto step = m_stepSize )
             value = qRound( value / step ) * step;
     }
     
-    return qBound( minimum(), value, maximum() );
+    return boundedValue( value );
 }
 
 QskIntervalF QskBoundedInput::alignedInterval( const QskIntervalF& interval ) const
 {
-    if ( m_data->snap )
+    if ( m_snap )
     {
-        if ( const auto step = m_data->stepSize )
+        if ( const auto step = m_stepSize )
         {
             const qreal lower = std::floor( interval.lowerBound() / step ) * step;
             const qreal upper = std::ceil( interval.upperBound() / step ) * step;
@@ -276,13 +174,13 @@ void QskBoundedInput::keyPressEvent( QKeyEvent* event )
     {
         if ( event->key() == Qt::Key_Up || event->matches( QKeySequence::MoveToNextChar ) )
         {
-            increment( m_data->stepSize );
+            increment( m_stepSize );
             return;
         }
 
         if ( event->key() == Qt::Key_Down || event->matches( QKeySequence::MoveToPreviousChar ) )
         {
-            increment( -m_data->stepSize );
+            increment( -m_stepSize );
             return;
         }
     }
@@ -311,10 +209,4 @@ void QskBoundedInput::wheelEvent( QWheelEvent* event )
 
 #endif
 
-void QskBoundedInput::componentComplete()
-{
-    Inherited::componentComplete();
-    adjustBoundaries( true );
-}
-
 #include "moc_QskBoundedInput.cpp"
diff --git a/src/controls/QskBoundedInput.h b/src/controls/QskBoundedInput.h
index ace7ca20..8ccdf6d4 100644
--- a/src/controls/QskBoundedInput.h
+++ b/src/controls/QskBoundedInput.h
@@ -6,26 +6,21 @@
 #ifndef QSK_BOUNDED_INPUT_H
 #define QSK_BOUNDED_INPUT_H
 
-#include "QskControl.h"
+#include "QskBoundedControl.h"
 
 class QskIntervalF;
 
-class QSK_EXPORT QskBoundedInput : public QskControl
+class QSK_EXPORT QskBoundedInput : public QskBoundedControl
 {
     Q_OBJECT
 
-    Q_PROPERTY( qreal minimum READ minimum WRITE setMinimum NOTIFY minimumChanged )
-    Q_PROPERTY( qreal maximum READ maximum WRITE setMaximum NOTIFY maximumChanged )
-    Q_PROPERTY( QskIntervalF boundaries READ boundaries
-                WRITE setBoundaries NOTIFY boundariesChanged )
-
     Q_PROPERTY( qreal stepSize READ stepSize WRITE setStepSize NOTIFY stepSizeChanged )
     Q_PROPERTY( int pageSize READ pageSize WRITE setPageSize NOTIFY pageSizeChanged )
 
     Q_PROPERTY( bool snap READ snap WRITE setSnap NOTIFY snapChanged )
     Q_PROPERTY( bool readOnly READ isReadOnly WRITE setReadOnly NOTIFY readOnlyChanged )
 
-    using Inherited = QskControl;
+    using Inherited = QskBoundedControl;
 
   public:
     QSK_STATES( ReadOnly )
@@ -33,14 +28,6 @@ class QSK_EXPORT QskBoundedInput : public QskControl
     QskBoundedInput( QQuickItem* parent = nullptr );
     ~QskBoundedInput() override;
 
-    qreal minimum() const;
-    qreal maximum() const;
-
-    qreal boundaryLength() const;
-
-    void setBoundaries( qreal min, qreal max );
-    QskIntervalF boundaries() const;
-
     qreal stepSize() const;
     int pageSize() const;
 
@@ -51,10 +38,6 @@ class QSK_EXPORT QskBoundedInput : public QskControl
     bool isReadOnly() const;
 
   public Q_SLOTS:
-    void setMinimum( qreal );
-    void setMaximum( qreal );
-    void setBoundaries( const QskIntervalF& );
-
     void setStepSize( qreal );
     void setPageSize( int );
 
@@ -66,10 +49,6 @@ class QSK_EXPORT QskBoundedInput : public QskControl
     virtual void increment( qreal offset ) = 0;
 
   Q_SIGNALS:
-    void minimumChanged( qreal );
-    void maximumChanged( qreal );
-    void boundariesChanged( const QskIntervalF&  );
-
     void stepSizeChanged( qreal );
     void pageSizeChanged( qreal );
     void snapChanged( bool );
@@ -84,17 +63,15 @@ class QSK_EXPORT QskBoundedInput : public QskControl
 #endif
 
     void componentComplete() override;
-
     virtual void alignInput();
 
     qreal alignedValue( qreal ) const;
     QskIntervalF alignedInterval( const QskIntervalF& ) const;
 
   private:
-    void adjustBoundaries( bool increasing );
-
-    class PrivateData;
-    std::unique_ptr< PrivateData > m_data;
+    qreal m_stepSize = 0.1;
+    int m_pageSize = 1;
+    bool m_snap = false;
 };
 
 #endif
diff --git a/src/controls/QskBoundedRangeInput.cpp b/src/controls/QskBoundedRangeInput.cpp
index 882dd2f1..3d6dd9cb 100644
--- a/src/controls/QskBoundedRangeInput.cpp
+++ b/src/controls/QskBoundedRangeInput.cpp
@@ -50,7 +50,7 @@ void QskBoundedRangeInput::setLowerValue( qreal value )
     if ( isComponentComplete() )
     {
         value = std::min( value, m_range.upperBound() );
-        value = qBound( minimum(), value, maximum() );
+        value = boundedValue( value );
     }
 
     setRange( QskIntervalF( value, m_range.upperBound() ) );
@@ -66,7 +66,7 @@ void QskBoundedRangeInput::setUpperValue( qreal value )
     if ( isComponentComplete() )
     {
         value = std::max( m_range.lowerBound(), value );
-        value = qBound( minimum(), value, maximum() );
+        value = boundedValue( value );
     }
 
     setRange( QskIntervalF( m_range.lowerBound(), value ) );
diff --git a/src/controls/QskBoundedValueInput.cpp b/src/controls/QskBoundedValueInput.cpp
index 7a35515a..16832b7b 100644
--- a/src/controls/QskBoundedValueInput.cpp
+++ b/src/controls/QskBoundedValueInput.cpp
@@ -34,9 +34,9 @@ void QskBoundedValueInput::setValueAsRatio( qreal ratio )
     setValue( minimum() + ratio * boundaryLength() );
 }
 
-qreal QskBoundedValueInput::valueAsRatio() const 
+qreal QskBoundedValueInput::valueAsRatio() const
 {
-    return ( m_value - minimum() ) / boundaryLength();
+    return valueAsRatio( m_value );
 }
 
 void QskBoundedValueInput::setValue( qreal value )
diff --git a/src/controls/QskBoundedValueInput.h b/src/controls/QskBoundedValueInput.h
index 0b66ce3e..71d9f213 100644
--- a/src/controls/QskBoundedValueInput.h
+++ b/src/controls/QskBoundedValueInput.h
@@ -26,6 +26,7 @@ class QSK_EXPORT QskBoundedValueInput : public QskBoundedInput
 
     // [0.0, 1.0]
     qreal valueAsRatio() const; 
+    using QskBoundedInput::valueAsRatio;
 
   public Q_SLOTS:
     void setValue( qreal );
diff --git a/src/src.pro b/src/src.pro
index 37d4feae..7c2a3300 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -110,6 +110,7 @@ HEADERS += \
     controls/QskAbstractButton.h \
     controls/QskAnimationHint.h \
     controls/QskAnimator.h \
+    controls/QskBoundedControl.h \
     controls/QskBoundedInput.h \
     controls/QskBoundedRangeInput.h \
     controls/QskBoundedValueInput.h \
@@ -180,6 +181,7 @@ HEADERS += \
 SOURCES += \
     controls/QskAbstractButton.cpp \
     controls/QskAnimator.cpp \
+    controls/QskBoundedControl.cpp \
     controls/QskBoundedInput.cpp \
     controls/QskBoundedRangeInput.cpp \
     controls/QskBoundedValueInput.cpp \