diff --git a/src/adaptors/UBSvgSubsetAdaptor.cpp b/src/adaptors/UBSvgSubsetAdaptor.cpp
index e300bb3a..417e835d 100644
--- a/src/adaptors/UBSvgSubsetAdaptor.cpp
+++ b/src/adaptors/UBSvgSubsetAdaptor.cpp
@@ -30,6 +30,7 @@
 #include "domain/UBAbstractWidget.h"
 #include "domain/UBGraphicsStroke.h"
 #include "domain/UBGraphicsStrokesGroup.h"
+#include "domain/ubgraphicsgroupcontaineritem.h"
 #include "domain/UBItem.h"
 
 #include "tools/UBGraphicsRuler.h"
@@ -929,8 +930,13 @@ void UBSvgSubsetAdaptor::UBSvgSubsetWriter::writeSvgElement()
 
 bool UBSvgSubsetAdaptor::UBSvgSubsetWriter::persistScene()
 {
+
+
     if (mScene->isModified())
     {
+        static int i = 0;
+        qDebug() << "persist call no is " << ++i;
+
         QBuffer buffer;
         buffer.open(QBuffer::WriteOnly);
         mXmlWriter.setDevice(&buffer);
@@ -1035,146 +1041,162 @@ bool UBSvgSubsetAdaptor::UBSvgSubsetWriter::persistScene()
                 openStroke = 0;
             }
 
-            UBGraphicsPixmapItem *pixmapItem = qgraphicsitem_cast<UBGraphicsPixmapItem*> (item);
+            UBGraphicsGroupContainerItem *groupItem = qgraphicsitem_cast<UBGraphicsGroupContainerItem*>(item);
 
-            if (pixmapItem && pixmapItem->isVisible())
+            if (groupItem && groupItem->isVisible())
             {
-                pixmapItemToLinkedImage(pixmapItem);
+                qDebug() << "came across the group during the parsing";
                 continue;
             }
 
-            UBGraphicsSvgItem *svgItem = qgraphicsitem_cast<UBGraphicsSvgItem*> (item);
+            parseCommonItems(item);
+        }
 
-            if (svgItem && svgItem->isVisible())
-            {
-                svgItemToLinkedSvg(svgItem);
-                continue;
-            }
+        if (openStroke)
+        {
+            mXmlWriter.writeEndElement();
+            groupHoldsInfo = false;
+            openStroke = 0;
+        }
 
-            UBGraphicsVideoItem *videoItem = qgraphicsitem_cast<UBGraphicsVideoItem*> (item);
+        mXmlWriter.writeEndDocument();
+        QString fileName = mDocumentPath + UBFileSystemUtils::digitFileFormat("/page%1.svg", mPageIndex + 1);
+        QFile file(fileName);
 
-            if (videoItem && videoItem->isVisible())
-            {
-                videoItemToLinkedVideo(videoItem);
-                continue;
-            }
+        if (!file.open(QIODevice::WriteOnly | QIODevice::Truncate))
+        {
+            qCritical() << "cannot open " << fileName << " for writing ...";
+            return false;
+        }
+        file.write(buffer.data());
+        file.flush();
+        file.close();
 
-            UBGraphicsAudioItem* audioItem = qgraphicsitem_cast<UBGraphicsAudioItem*> (item);
-            if (audioItem && audioItem->isVisible()) {
-                audioItemToLinkedAudio(audioItem);
-                continue;
-            }
+    }
+    else
+    {
+        qDebug() << "ignoring unmodified page" << mPageIndex + 1;
+    }
 
-            UBGraphicsAppleWidgetItem *appleWidgetItem = qgraphicsitem_cast<UBGraphicsAppleWidgetItem*> (item);
+    return true;
+}
 
-            if (appleWidgetItem && appleWidgetItem->isVisible())
-            {
-                graphicsAppleWidgetToSvg(appleWidgetItem);
-                continue;
-            }
+bool UBSvgSubsetAdaptor::UBSvgSubsetWriter::parseCommonItems(QGraphicsItem *item)
+{
+    UBGraphicsPixmapItem *pixmapItem = qgraphicsitem_cast<UBGraphicsPixmapItem*> (item);
 
-            UBGraphicsW3CWidgetItem *w3cWidgetItem = qgraphicsitem_cast<UBGraphicsW3CWidgetItem*> (item);
+    if (pixmapItem && pixmapItem->isVisible())
+    {
+        pixmapItemToLinkedImage(pixmapItem);
+        return true;
+    }
 
-            if (w3cWidgetItem && w3cWidgetItem->isVisible())
-            {
-                graphicsW3CWidgetToSvg(w3cWidgetItem);
-                continue;
-            }
+    UBGraphicsSvgItem *svgItem = qgraphicsitem_cast<UBGraphicsSvgItem*> (item);
 
-            UBGraphicsPDFItem *pdfItem = qgraphicsitem_cast<UBGraphicsPDFItem*> (item);
+    if (svgItem && svgItem->isVisible())
+    {
+        svgItemToLinkedSvg(svgItem);
+        return true;
+    }
 
-            if (pdfItem && pdfItem->isVisible())
-            {
-                pdfItemToLinkedPDF(pdfItem);
-                continue;
-            }
+    UBGraphicsVideoItem *videoItem = qgraphicsitem_cast<UBGraphicsVideoItem*> (item);
 
-            UBGraphicsTextItem *textItem = qgraphicsitem_cast<UBGraphicsTextItem*> (item);
+    if (videoItem && videoItem->isVisible())
+    {
+        videoItemToLinkedVideo(videoItem);
+        return true;
+    }
 
-            if (textItem && textItem->isVisible())
-            {
-                textItemToSvg(textItem);
-                continue;
-            }
+    UBGraphicsAudioItem* audioItem = qgraphicsitem_cast<UBGraphicsAudioItem*> (item);
+    if (audioItem && audioItem->isVisible()) {
+        audioItemToLinkedAudio(audioItem);
+        return true;
+    }
 
-            UBGraphicsCurtainItem *curtainItem = qgraphicsitem_cast<UBGraphicsCurtainItem*> (item);
+    UBGraphicsAppleWidgetItem *appleWidgetItem = qgraphicsitem_cast<UBGraphicsAppleWidgetItem*> (item);
 
-            if (curtainItem && curtainItem->isVisible())
-            {
-                curtainItemToSvg(curtainItem);
-                continue;
-            }
+    if (appleWidgetItem && appleWidgetItem->isVisible())
+    {
+        graphicsAppleWidgetToSvg(appleWidgetItem);
+        return true;
+    }
 
-            UBGraphicsRuler *ruler = qgraphicsitem_cast<UBGraphicsRuler*> (item);
+    UBGraphicsW3CWidgetItem *w3cWidgetItem = qgraphicsitem_cast<UBGraphicsW3CWidgetItem*> (item);
 
-            if (ruler && ruler->isVisible())
-            {
-                rulerToSvg(ruler);
-                continue;
-            }
+    if (w3cWidgetItem && w3cWidgetItem->isVisible())
+    {
+        graphicsW3CWidgetToSvg(w3cWidgetItem);
+        return true;
+    }
 
-            UBGraphicsCache* cache = qgraphicsitem_cast<UBGraphicsCache*>(item);
-            if(cache && cache->isVisible())
-            {
-                cacheToSvg(cache);
-                continue;
-            }
+    UBGraphicsPDFItem *pdfItem = qgraphicsitem_cast<UBGraphicsPDFItem*> (item);
 
-            UBGraphicsCompass *compass = qgraphicsitem_cast<UBGraphicsCompass*> (item);
+    if (pdfItem && pdfItem->isVisible())
+    {
+        pdfItemToLinkedPDF(pdfItem);
+        return true;
+    }
 
-            if (compass && compass->isVisible())
-            {
-                compassToSvg(compass);
-                continue;
-            }
+    UBGraphicsTextItem *textItem = qgraphicsitem_cast<UBGraphicsTextItem*> (item);
 
-            UBGraphicsProtractor *protractor = qgraphicsitem_cast<UBGraphicsProtractor*> (item);
+    if (textItem && textItem->isVisible())
+    {
+        textItemToSvg(textItem);
+        return true;
+    }
 
-            if (protractor && protractor->isVisible())
-            {
-                protractorToSvg(protractor);
-                continue;
-            }
+    UBGraphicsCurtainItem *curtainItem = qgraphicsitem_cast<UBGraphicsCurtainItem*> (item);
 
-            UBGraphicsTriangle *triangle = qgraphicsitem_cast<UBGraphicsTriangle*> (item);
+    if (curtainItem && curtainItem->isVisible())
+    {
+        curtainItemToSvg(curtainItem);
+        return true;
+    }
 
-            if (triangle && triangle->isVisible())
-            {
-                triangleToSvg(triangle);
-                continue;
-            }
-        }
+    UBGraphicsRuler *ruler = qgraphicsitem_cast<UBGraphicsRuler*> (item);
 
-        if (openStroke)
-        {
-            mXmlWriter.writeEndElement();
-            groupHoldsInfo = false;
-            openStroke = 0;
-        }
+    if (ruler && ruler->isVisible())
+    {
+        rulerToSvg(ruler);
+        return true;
+    }
 
-        mXmlWriter.writeEndDocument();
-        QString fileName = mDocumentPath + UBFileSystemUtils::digitFileFormat("/page%1.svg", mPageIndex + 1);
-        QFile file(fileName);
+    UBGraphicsCache* cache = qgraphicsitem_cast<UBGraphicsCache*>(item);
+    if(cache && cache->isVisible())
+    {
+        cacheToSvg(cache);
+        return true;
+    }
 
-        if (!file.open(QIODevice::WriteOnly | QIODevice::Truncate))
-        {
-            qCritical() << "cannot open " << fileName << " for writing ...";
-            return false;
-        }
-        file.write(buffer.data());
-        file.flush();
-        file.close();
+    UBGraphicsCompass *compass = qgraphicsitem_cast<UBGraphicsCompass*> (item);
 
+    if (compass && compass->isVisible())
+    {
+        compassToSvg(compass);
+        return true;
     }
-    else
+
+    UBGraphicsProtractor *protractor = qgraphicsitem_cast<UBGraphicsProtractor*> (item);
+
+    if (protractor && protractor->isVisible())
     {
-        qDebug() << "ignoring unmodified page" << mPageIndex + 1;
+        protractorToSvg(protractor);
+        return true;
+    }
+
+    UBGraphicsTriangle *triangle = qgraphicsitem_cast<UBGraphicsTriangle*> (item);
+
+    if (triangle && triangle->isVisible())
+    {
+        triangleToSvg(triangle);
+        return true;
     }
 
     return true;
 }
 
 
+
 void UBSvgSubsetAdaptor::UBSvgSubsetWriter::polygonItemToSvgLine(UBGraphicsPolygonItem* polygonItem, bool groupHoldsInfo)
 {
     mXmlWriter.writeStartElement("line");
diff --git a/src/adaptors/UBSvgSubsetAdaptor.h b/src/adaptors/UBSvgSubsetAdaptor.h
index 188bba2f..6514cf20 100644
--- a/src/adaptors/UBSvgSubsetAdaptor.h
+++ b/src/adaptors/UBSvgSubsetAdaptor.h
@@ -156,6 +156,7 @@ class UBSvgSubsetAdaptor
                 UBSvgSubsetWriter(UBDocumentProxy* proxy, UBGraphicsScene* pScene, const int pageIndex);
 
                 bool persistScene();
+                bool parseCommonItems(QGraphicsItem *item);
 
                 virtual ~UBSvgSubsetWriter(){}
 
diff --git a/src/board/UBBoardController.cpp b/src/board/UBBoardController.cpp
index d3faba2b..512c4446 100644
--- a/src/board/UBBoardController.cpp
+++ b/src/board/UBBoardController.cpp
@@ -1235,10 +1235,12 @@ void UBBoardController::ClearUndoStack()
     while (itUniq.hasNext())
     {
         QGraphicsItem* item = itUniq.next();
-        UBGraphicsScene *scene = dynamic_cast<UBGraphicsScene*>(item->scene());
-        if(!scene)
-        {
-            mActiveScene->deleteItem(item);
+        if (item->scene()) {
+            UBGraphicsScene *scene = dynamic_cast<UBGraphicsScene*>(item->scene());
+            if(!scene)
+            {
+                mActiveScene->deleteItem(item);
+            }
         }
     }
 
diff --git a/src/domain/UBGraphicsItemDelegate.cpp b/src/domain/UBGraphicsItemDelegate.cpp
index db37d684..ad352753 100644
--- a/src/domain/UBGraphicsItemDelegate.cpp
+++ b/src/domain/UBGraphicsItemDelegate.cpp
@@ -236,27 +236,25 @@ void UBGraphicsItemDelegate::setMimeData(QMimeData *mimeData)
 
 bool UBGraphicsItemDelegate::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 {
-    if((NULL != mMimeData) && ((event->pos() - mDragStartPosition).manhattanLength() < QApplication::startDragDistance()))
-        {
-            QDrag* mDrag = new QDrag(event->widget());
-            mDrag->setMimeData(mMimeData);
-            if (!mDragPixmap.isNull()) {
-                mDrag->setPixmap(mDragPixmap);
-                mDrag->setHotSpot(mDragPixmap.rect().center());
-            }
-            mDrag->exec();
-            mDragPixmap = QPixmap();
-
-            return true;
+    if(mMimeData) {
+        QDrag* mDrag = new QDrag(event->widget());
+        mDrag->setMimeData(mMimeData);
+        if (!mDragPixmap.isNull()) {
+            mDrag->setPixmap(mDragPixmap);
+            mDrag->setHotSpot(mDragPixmap.rect().center());
         }
+        mDrag->exec();
+        mDragPixmap = QPixmap();
 
-    if(isLocked())
-    {
-        event->accept();
         return true;
     }
 
-    return true;
+    if(isLocked()) {
+        event->accept();
+        return true;
+    } else {
+        return false;
+    }
 }
 
 bool UBGraphicsItemDelegate::weelEvent(QGraphicsSceneWheelEvent *event)
diff --git a/src/domain/UBGraphicsPolygonItem.cpp b/src/domain/UBGraphicsPolygonItem.cpp
index 1fc87f6a..9c6dee10 100644
--- a/src/domain/UBGraphicsPolygonItem.cpp
+++ b/src/domain/UBGraphicsPolygonItem.cpp
@@ -189,18 +189,18 @@ void UBGraphicsPolygonItem::paint ( QPainter * painter, const QStyleOptionGraphi
     QGraphicsPolygonItem::paint(painter, option, widget);
 }
 
-//QPainterPath UBGraphicsPolygonItem::shape() const
-//{
+QPainterPath UBGraphicsPolygonItem::shape() const
+{
 
-//    QPainterPath path;
-//    path.addRect(boundingRect());
+    QPainterPath path;
+    path.addRect(boundingRect());
 
-//    return path;
+    return path;
 
-////    static QPainterPath shapePath = QGraphicsPolygonItem::shape();
+//    static QPainterPath shapePath = QGraphicsPolygonItem::shape();
 
-////    return shapePath;
-//}
+//    return shapePath;
+}
 
 
 UBGraphicsScene* UBGraphicsPolygonItem::scene()
diff --git a/src/domain/UBGraphicsPolygonItem.h b/src/domain/UBGraphicsPolygonItem.h
index 663658f2..851092b2 100644
--- a/src/domain/UBGraphicsPolygonItem.h
+++ b/src/domain/UBGraphicsPolygonItem.h
@@ -118,7 +118,7 @@ class UBGraphicsPolygonItem : public QGraphicsPolygonItem, public UBItem
 
     protected:
         void paint ( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget);
-//        QPainterPath shape () const;
+        QPainterPath shape () const;
 
 
     private:
diff --git a/src/domain/UBGraphicsScene.cpp b/src/domain/UBGraphicsScene.cpp
index 0b19870c..da622bda 100644
--- a/src/domain/UBGraphicsScene.cpp
+++ b/src/domain/UBGraphicsScene.cpp
@@ -294,9 +294,15 @@ UBGraphicsScene::UBGraphicsScene(UBDocumentProxy* parent)
     }
 
     connect(this, SIGNAL(selectionChanged()), this, SLOT(selectionChangedProcessing()));
-    connect(this, SIGNAL(selectionChanged()), this, SLOT(groupButtonProcessing()));
+    connect(this, SIGNAL(selectionChanged()), this, SLOT(updateGroupButtonState()));
 
-    connect(UBApplication::mainWindow->actionGroupItems, SIGNAL(triggered()), this, SLOT(groupButtonClicked()));
+//  just a stub don't treat as a result code
+//    static int i = 0;
+//    i++;
+//    if (i == 1) {
+        connect(UBApplication::mainWindow->actionGroupItems, SIGNAL(triggered()), this, SLOT(groupButtonClicked()));
+//        qDebug() << "the connect is accepted";
+//    }
 }
 
 UBGraphicsScene::~UBGraphicsScene()
@@ -315,7 +321,7 @@ void UBGraphicsScene::selectionChangedProcessing()
         UBApplication::showMessage("ZValue is " + QString::number(selectedItems().first()->zValue(), 'f') + "own z value is "
                                                 + QString::number(selectedItems().first()->data(UBGraphicsItemData::ItemOwnZValue).toReal(), 'f'));
 }
-void UBGraphicsScene::groupButtonProcessing()
+void UBGraphicsScene::updateGroupButtonState()
 {
     QAction *groupAction = UBApplication::mainWindow->actionGroupItems;
     QList<QGraphicsItem*> selItems = selectedItems();
@@ -351,11 +357,18 @@ void UBGraphicsScene::groupButtonClicked()
         UBGraphicsGroupContainerItem *groupItem = new UBGraphicsGroupContainerItem();
 
         foreach (QGraphicsItem *item, selItems) {
-            item->setSelected(false);
-            item->setFlag(QGraphicsItem::ItemIsSelectable, false);
-            item->setFlag( QGraphicsItem::ItemIsMovable, false);
-            item->setFlag(QGraphicsItem::ItemIsFocusable);
-            groupItem->addToGroup(item);
+            if (item->type() == UBGraphicsGroupContainerItem::Type) {
+                QList<QGraphicsItem*> childItems = item->childItems();
+                UBGraphicsGroupContainerItem *currentGroup = dynamic_cast<UBGraphicsGroupContainerItem*>(item);
+                if (currentGroup) {
+                    currentGroup->destroy();
+                }
+                foreach (QGraphicsItem *chItem, childItems) {
+                    groupItem->addToGroup(chItem);
+                }
+            } else {
+                groupItem->addToGroup(item);
+            }
         }
 
         addItem(groupItem);
@@ -375,26 +388,6 @@ void UBGraphicsScene::groupButtonClicked()
     }
 
 }
-void UBGraphicsScene::processGroupItems()
-{
-    qDebug() << "processing grouping items";
-
-    UBGraphicsGroupContainerItem *groupItem = new UBGraphicsGroupContainerItem();
-
-    foreach (QGraphicsItem *item, selectedItems()) {
-        item->setSelected(false);
-        item->setFlag(QGraphicsItem::ItemIsSelectable, true);
-        item->setFlag( QGraphicsItem::ItemIsMovable, false);
-        item->setFlag(QGraphicsItem::ItemIsFocusable, true);
-        groupItem->addToGroup(item);
-    }
-
-    addItem(groupItem);
-//    groupItem->setPos(50, 50);
-    groupItem->setVisible(true);
-    groupItem->setFocus();
-    qDebug() << groupItem->boundingRect();
-}
 
 // MARK: -
 // MARK: Mouse/Tablet events handling
diff --git a/src/domain/UBGraphicsScene.h b/src/domain/UBGraphicsScene.h
index 4e531204..c26c76a1 100644
--- a/src/domain/UBGraphicsScene.h
+++ b/src/domain/UBGraphicsScene.h
@@ -305,9 +305,8 @@ public slots:
         void setToolCursor(int tool);
 
         void selectionChangedProcessing();
-        void groupButtonProcessing();
+        void updateGroupButtonState();
         void groupButtonClicked();
-        void processGroupItems();
 
         void moveMagnifier(QPoint newPos);
         void closeMagnifier();
diff --git a/src/domain/ubgraphicsgroupcontaineritem.cpp b/src/domain/ubgraphicsgroupcontaineritem.cpp
index 41cc19d6..64f68eee 100644
--- a/src/domain/ubgraphicsgroupcontaineritem.cpp
+++ b/src/domain/ubgraphicsgroupcontaineritem.cpp
@@ -46,6 +46,12 @@ void UBGraphicsGroupContainerItem::addToGroup(QGraphicsItem *item)
         return;
     }
 
+    //setting item flags to given item
+    item->setSelected(false);
+    item->setFlag(QGraphicsItem::ItemIsSelectable, false);
+    item->setFlag( QGraphicsItem::ItemIsMovable, false);
+    item->setFlag(QGraphicsItem::ItemIsFocusable, true);
+
     QTransform newItemTransform(itemTransform);
     item->setPos(mapFromItem(item, 0, 0));
     item->setParentItem(this);
@@ -130,20 +136,24 @@ void UBGraphicsGroupContainerItem::paint(QPainter *painter, const QStyleOptionGr
                                QWidget *widget)
 {
     Q_UNUSED(widget);
-    if (option->state & QStyle::State_Selected) {
-        painter->setBrush(Qt::NoBrush);
-        QPen tmpPen;
-        qreal tmpPenWidth = 1.0;
-        tmpPen.setWidth(tmpPenWidth);
-        tmpPen.setColor(Qt::lightGray);
-        painter->setPen(tmpPen);
-        painter->drawRect(itemsBoundingRect.adjusted(tmpPenWidth / 2, tmpPenWidth / 2, -tmpPenWidth / 2, -tmpPenWidth / 2));
-    }
+    Q_UNUSED(painter);
+    Q_UNUSED(option);
+
+//    we would not use paint smth for the moment
+//    if (option->state & QStyle::State_Selected) {
+//        painter->setBrush(Qt::NoBrush);
+//        QPen tmpPen;
+//        qreal tmpPenWidth = 1.0;
+//        tmpPen.setWidth(tmpPenWidth);
+//        tmpPen.setColor(Qt::lightGray);
+//        painter->setPen(tmpPen);
+//        painter->drawRect(itemsBoundingRect.adjusted(tmpPenWidth / 2, tmpPenWidth / 2, -tmpPenWidth / 2, -tmpPenWidth / 2));
+//    }
 }
 
 UBGraphicsScene *UBGraphicsGroupContainerItem::scene()
 {
-    UBGraphicsScene *castScene = dynamic_cast<UBGraphicsScene*>(scene());
+    UBGraphicsScene *castScene = dynamic_cast<UBGraphicsScene*>(QGraphicsItem::scene());
 
     return castScene;
 }
@@ -178,7 +188,12 @@ void UBGraphicsGroupContainerItem::destroy() {
         item->setFlag(QGraphicsItem::ItemIsFocusable, true);
     }
 
-    mDelegate->remove(true);
+    remove();
+
+    if (scene()) {
+        qDebug() << "scene is well casted";
+        scene()->removeItem(this);
+    }
 }
 
 void UBGraphicsGroupContainerItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
@@ -186,9 +201,12 @@ void UBGraphicsGroupContainerItem::mousePressEvent(QGraphicsSceneMouseEvent *eve
     if (mDelegate->mousePressEvent(event)) {
         //NOOP
     } else {
-        QGraphicsItem::mousePressEvent(event);
+
+    QGraphicsItem::mousePressEvent(event);
         setSelected(true);
     }
+
+
 }
 
 void UBGraphicsGroupContainerItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
@@ -198,11 +216,12 @@ void UBGraphicsGroupContainerItem::mouseMoveEvent(QGraphicsSceneMouseEvent *even
     } else {
         QGraphicsItem::mouseMoveEvent(event);
     }
+
 }
 
 void UBGraphicsGroupContainerItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 {
-    mDelegate->mouseReleaseEvent(event);
+//    mDelegate->mouseReleaseEvent(event);
     QGraphicsItem::mouseReleaseEvent(event);
 }
 
diff --git a/src/domain/ubgraphicsgroupcontaineritemdelegate.cpp b/src/domain/ubgraphicsgroupcontaineritemdelegate.cpp
index 3fcf7b3f..db50b095 100644
--- a/src/domain/ubgraphicsgroupcontaineritemdelegate.cpp
+++ b/src/domain/ubgraphicsgroupcontaineritemdelegate.cpp
@@ -46,3 +46,24 @@ void UBGraphicsGroupContainerItemDelegate::buildButtons()
 {
     UBGraphicsItemDelegate::buildButtons();
 }
+
+bool UBGraphicsGroupContainerItemDelegate::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    Q_UNUSED(event)
+
+    return false;
+}
+
+bool UBGraphicsGroupContainerItemDelegate::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    Q_UNUSED(event)
+
+    return false;
+}
+
+bool UBGraphicsGroupContainerItemDelegate::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    Q_UNUSED(event)
+
+    return false;
+}
diff --git a/src/domain/ubgraphicsgroupcontaineritemdelegate.h b/src/domain/ubgraphicsgroupcontaineritemdelegate.h
index 56a525f8..2396b10c 100644
--- a/src/domain/ubgraphicsgroupcontaineritemdelegate.h
+++ b/src/domain/ubgraphicsgroupcontaineritemdelegate.h
@@ -17,6 +17,10 @@ protected:
     virtual void decorateMenu(QMenu *menu);
     virtual void buildButtons();
 
+    virtual bool mousePressEvent(QGraphicsSceneMouseEvent *event);
+    virtual bool mouseMoveEvent(QGraphicsSceneMouseEvent *event);
+    virtual bool mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
+
 private:
     DelegateButton *mDestroyGroupButton;
 };