diff --git a/demos/chartviewer/window.cpp b/demos/chartviewer/window.cpp
index 9c7a1f8..7628f8e 100644
--- a/demos/chartviewer/window.cpp
+++ b/demos/chartviewer/window.cpp
@@ -95,13 +95,6 @@ Window::Window(QWidget* parent) :
     baseLayout->addItem(settingsLayout, 0, 3, 2, 1);
     //create charts
 
-    int i = m_widgetHash.count();
-    foreach(QGraphicsProxyWidget* widget , m_widgetHash) {
-        widget->setZValue(i--);
-        widget->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);
-    }
-
-
     Charts::ChartList list = Charts::chartList();
 
     for(int i = 0 ; i < 6 ; ++i)
@@ -133,13 +126,13 @@ Window::~Window()
 
 void Window::connectSignals()
 {
-    connect(m_themeComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateUI()));
-    connect(m_antialiasCheckBox, SIGNAL(toggled(bool)), this, SLOT(updateUI()));
-    connect(m_openGLCheckBox, SIGNAL(toggled(bool)), this, SLOT(updateUI()));
-    connect(m_zoomCheckBox, SIGNAL(toggled(bool)), this, SLOT(updateUI()));
-    connect(m_scrollCheckBox, SIGNAL(toggled(bool)), this, SLOT(updateUI()));
-    connect(m_animatedComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateUI()));
-    connect(m_legendComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateUI()));
+    QObject::connect(m_themeComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateUI()));
+    QObject::connect(m_antialiasCheckBox, SIGNAL(toggled(bool)), this, SLOT(updateUI()));
+    QObject::connect(m_openGLCheckBox, SIGNAL(toggled(bool)), this, SLOT(updateUI()));
+    QObject::connect(m_zoomCheckBox, SIGNAL(toggled(bool)), this, SLOT(updateUI()));
+    QObject::connect(m_scrollCheckBox, SIGNAL(toggled(bool)), this, SLOT(updateUI()));
+    QObject::connect(m_animatedComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateUI()));
+    QObject::connect(m_legendComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateUI()));
 }
 
 DataTable Window::generateRandomData(int listCount, int valueMax, int valueCount) const
@@ -188,10 +181,10 @@ void Window::createProxyWidgets()
     m_widgetHash["scrollCheckBox"] = m_scene->addWidget(m_scrollCheckBox);
 }
 
-QComboBox* Window::createThemeBox() const
+QComboBox* Window::createThemeBox()
 {
     // settings layoutQGLWidget’
-    QComboBox* themeComboBox = new QComboBox();
+    QComboBox* themeComboBox = new ComboBox(this);
     themeComboBox->addItem("Light", QChart::ChartThemeLight);
     themeComboBox->addItem("Blue Cerulean", QChart::ChartThemeBlueCerulean);
     themeComboBox->addItem("Dark", QChart::ChartThemeDark);
@@ -202,10 +195,10 @@ QComboBox* Window::createThemeBox() const
     return themeComboBox;
 }
 
-QComboBox* Window::createAnimationBox() const
+QComboBox* Window::createAnimationBox()
 {
     // settings layout
-    QComboBox* animationComboBox = new QComboBox();
+    QComboBox* animationComboBox = new ComboBox(this);
     animationComboBox->addItem("No Animations", QChart::NoAnimation);
     animationComboBox->addItem("GridAxis Animations", QChart::GridAxisAnimations);
     animationComboBox->addItem("Series Animations", QChart::SeriesAnimations);
@@ -213,9 +206,9 @@ QComboBox* Window::createAnimationBox() const
     return animationComboBox;
 }
 
-QComboBox* Window::createLegendBox() const
+QComboBox* Window::createLegendBox()
 {
-    QComboBox* legendComboBox = new QComboBox();
+    QComboBox* legendComboBox = new ComboBox(this);
     legendComboBox->addItem("No Legend ", 0);
     legendComboBox->addItem("Legend Top", Qt::AlignTop);
     legendComboBox->addItem("Legend Bottom", Qt::AlignBottom);
@@ -428,3 +421,13 @@ void Window::mouseReleaseEvent(QMouseEvent *event)
         }
     }
 }
+
+void Window::comboBoxFocused(QComboBox *combobox)
+{
+    foreach(QGraphicsProxyWidget* widget , m_widgetHash) {
+       if(widget->widget()==combobox)
+        widget->setZValue(2.0);
+       else
+        widget->setZValue(0.0);
+    }
+}
diff --git a/demos/chartviewer/window.h b/demos/chartviewer/window.h
index 2f8ffba..7b0a593 100644
--- a/demos/chartviewer/window.h
+++ b/demos/chartviewer/window.h
@@ -23,8 +23,8 @@
 #include <QMainWindow>
 #include <QChartGlobal>
 #include <QHash>
+#include <QComboBox>
 
-class QComboBox;
 class QCheckBox;
 class QGraphicsRectItem;
 class QGraphicsScene;
@@ -41,6 +41,7 @@ typedef QList<DataList> DataTable;
 
 QTCOMMERCIALCHART_USE_NAMESPACE
 
+
 class Window: public QMainWindow
 {
     Q_OBJECT
@@ -54,11 +55,12 @@ private Q_SLOTS:
 
 private:
     DataTable generateRandomData(int listCount,int valueMax,int valueCount) const;
-    QComboBox* createThemeBox() const;
-    QComboBox* createAnimationBox() const;
-    QComboBox* createLegendBox() const;
+    QComboBox* createThemeBox();
+    QComboBox* createAnimationBox();
+    QComboBox* createLegendBox();
     void connectSignals();
     void createProxyWidgets();
+    void comboBoxFocused(QComboBox *combox);
 
 protected:
     void mousePressEvent(QMouseEvent *event);
@@ -91,6 +93,24 @@ private:
     bool m_isZooming;
     bool m_scroll;
     bool m_zoom;
+
+    friend class ComboBox;
+};
+
+class ComboBox: public QComboBox
+{
+public:
+    ComboBox(Window* window,QWidget *parent = 0):QComboBox(parent),m_window(window)
+    {}
+
+protected:
+    void focusInEvent(QFocusEvent *e)
+    {
+        QComboBox::focusInEvent(e);
+        m_window->comboBoxFocused(this);
+    }
+private:
+    Window* m_window;
 };
 
 #endif