diff --git a/src/KGantt/kganttgraphicsitem.cpp b/src/KGantt/kganttgraphicsitem.cpp
--- a/src/KGantt/kganttgraphicsitem.cpp
+++ b/src/KGantt/kganttgraphicsitem.cpp
@@ -133,7 +133,7 @@
         case StyleOptionGanttItem::Center: opt.displayAlignment = Qt::AlignCenter; break;
         }
     }
-    opt.grid = scene()->grid();
+    opt.grid = const_cast<AbstractGrid*>(scene()->getGrid());
     opt.text = m_index.model()->data( m_index, Qt::DisplayRole ).toString();
     if ( isEnabled() ) opt.state  |= QStyle::State_Enabled;
     if ( isSelected() ) opt.state |= QStyle::State_Selected;
@@ -288,7 +288,7 @@
         return;
     }
 
-    const Span s = scene()->grid()->mapToChart( static_cast<const QModelIndex&>(idx) );
+    const Span s = scene()->getGrid()->mapToChart( static_cast<const QModelIndex&>(idx) );
     setPos( QPointF( s.start(), rowGeometry.start() ) );
     setRect( QRectF( 0., 0., s.length(), rowGeometry.length() ) );
     setIndex( idx );
@@ -369,7 +369,7 @@
                  it2 != m_endConstraints.end() ;
                  ++it2 )
                 constraints.push_back((*it2)->proxyConstraint());
-            if ( scene()->grid()->mapFromChart( Span( scenePos().x(), rect().width() ),
+            if ( scene()->getGrid()->mapFromChart( Span( scenePos().x(), rect().width() ),
                                                 index(),
                                                 constraints ) ) {
                 scene()->updateRow( index().parent() );
diff --git a/src/KGantt/kganttgraphicsscene.h b/src/KGantt/kganttgraphicsscene.h
--- a/src/KGantt/kganttgraphicsscene.h
+++ b/src/KGantt/kganttgraphicsscene.h
@@ -82,6 +82,7 @@
 
         void setGrid( AbstractGrid* grid );
         AbstractGrid* grid() const;
+        const AbstractGrid *getGrid() const;
 
         bool isReadOnly() const;
 
diff --git a/src/KGantt/kganttgraphicsscene.cpp b/src/KGantt/kganttgraphicsscene.cpp
--- a/src/KGantt/kganttgraphicsscene.cpp
+++ b/src/KGantt/kganttgraphicsscene.cpp
@@ -24,6 +24,7 @@
 #include "kganttconstraintgraphicsitem.h"
 #include "kganttitemdelegate.h"
 #include "kganttabstractrowcontroller.h"
+#include "kganttabstractgrid.h"
 #include "kganttdatetimegrid.h"
 #include "kganttsummaryhandlingproxymodel.h"
 
@@ -179,6 +180,16 @@
     clearConstraintItems();
 }
 
+AbstractGrid *GraphicsScene::Private::getGrid()
+{
+    return grid.isNull() ? &default_grid : grid;
+}
+
+const AbstractGrid *GraphicsScene::Private::getGrid() const
+{
+    return grid.isNull() ? &default_grid : grid;
+}
+
 GraphicsScene::GraphicsScene( QObject* parent )
     : QGraphicsScene( parent ), _d( new Private( this ) )
 {
@@ -197,7 +208,7 @@
 {
     setItemIndexMethod( QGraphicsScene::NoIndex );
     setConstraintModel( new ConstraintModel( this ) );
-    connect( d->grid, SIGNAL(gridChanged()), this, SLOT(slotGridChanged()) );
+    connect( d->getGrid(), SIGNAL(gridChanged()), this, SLOT(slotGridChanged()) );
 }
 
 /* NOTE: The delegate should really be a property
@@ -226,7 +237,7 @@
 {
     assert(!d->summaryHandlingModel.isNull());
     d->summaryHandlingModel->setSourceModel(model);
-    d->grid->setModel( d->summaryHandlingModel );
+    d->getGrid()->setModel( d->summaryHandlingModel );
     setSelectionModel( new QItemSelectionModel( model, this ) );
 }
 
@@ -243,12 +254,12 @@
 
 void GraphicsScene::setRootIndex( const QModelIndex& idx )
 {
-    d->grid->setRootIndex( idx );
+    d->getGrid()->setRootIndex( idx );
 }
 
 QModelIndex GraphicsScene::rootIndex() const
 {
-    return d->grid->rootIndex();
+    return d->getGrid()->rootIndex();
 }
 
 ConstraintModel* GraphicsScene::constraintModel() const
@@ -295,22 +306,28 @@
 void GraphicsScene::setGrid( AbstractGrid* grid )
 {
     QAbstractItemModel* model = nullptr;
-    if ( grid == nullptr ) grid = &d->default_grid;
-    if ( d->grid ) {
-        d->grid->disconnect( this );
-        model = d->grid->model();
+    if ( d->getGrid() ) {
+        d->getGrid()->disconnect( this );
+        model = d->getGrid()->model();
     }
     d->grid = grid;
-    connect( d->grid, SIGNAL(gridChanged()), this, SLOT(slotGridChanged()) );
-    d->grid->setModel( model );
+    connect( d->getGrid(), SIGNAL(gridChanged()), this, SLOT(slotGridChanged()) );
+    d->getGrid()->setModel( model );
     slotGridChanged();
 }
 
+// Returns the explicitly set grid
 AbstractGrid* GraphicsScene::grid() const
 {
     return d->grid;
 }
 
+// May also return the default_grid if a grid has not been set
+const AbstractGrid *GraphicsScene::getGrid() const
+{
+    return d->getGrid();
+}
+
 void GraphicsScene::setReadOnly( bool ro )
 {
     d->readOnly = ro;
@@ -595,7 +612,7 @@
         QRectF headerRect( scn.topLeft()+QPointF( d->labelsWidth, 0 ),
                            QSizeF( scn.width()-d->labelsWidth, d->rowController->headerHeight() ));
 
-        d->grid->paintHeader( painter, headerRect, rect, 0, nullptr );
+        d->getGrid()->paintHeader( painter, headerRect, rect, 0, nullptr );
 
 #if 0
         /* We have to blank out the part of the header that is invisible during
@@ -614,14 +631,14 @@
         scn.setLeft( headerRect.left() );
         rect = rect.intersected( scn );
     }
-    d->grid->paintGrid( painter, scn, rect, d->rowController );
+    d->getGrid()->paintGrid( painter, scn, rect, d->rowController );
 
-    d->grid->drawBackground(painter, rect);
+    d->getGrid()->drawBackground(painter, rect);
 }
 
 void GraphicsScene::drawForeground( QPainter* painter, const QRectF& rect )
 {
-    d->grid->drawForeground(painter, rect);
+    d->getGrid()->drawForeground(painter, rect);
 }
 
 void GraphicsScene::itemEntered( const QModelIndex& idx )
diff --git a/src/KGantt/kganttgraphicsscene_p.h b/src/KGantt/kganttgraphicsscene_p.h
--- a/src/KGantt/kganttgraphicsscene_p.h
+++ b/src/KGantt/kganttgraphicsscene_p.h
@@ -31,6 +31,8 @@
 #include "kganttdatetimegrid.h"
 
 namespace KGantt {
+    class AbstractGrid;
+
     class Q_DECL_HIDDEN GraphicsScene::Private {
     public:
         explicit Private(GraphicsScene*);
@@ -45,6 +47,8 @@
 	void recursiveUpdateMultiItem( const Span& span, const QModelIndex& idx );
 
         void clearItems();
+        AbstractGrid *getGrid();
+        const AbstractGrid *getGrid() const;
 
         GraphicsScene* q;
 
diff --git a/src/KGantt/kganttgraphicsview.h b/src/KGantt/kganttgraphicsview.h
--- a/src/KGantt/kganttgraphicsview.h
+++ b/src/KGantt/kganttgraphicsview.h
@@ -72,6 +72,7 @@
         QItemSelectionModel* selectionModel() const;
         AbstractRowController* rowController() const;
         AbstractGrid* grid() const;
+        AbstractGrid* takeGrid();
         ItemDelegate* itemDelegate() const;
 
         bool isReadOnly() const;
diff --git a/src/KGantt/kganttgraphicsview.cpp b/src/KGantt/kganttgraphicsview.cpp
--- a/src/KGantt/kganttgraphicsview.cpp
+++ b/src/KGantt/kganttgraphicsview.cpp
@@ -564,6 +564,17 @@
     return d->scene.grid();
 }
 
+/*! \returns the AbstractGrid used by this view.
+ */
+AbstractGrid* GraphicsView::takeGrid()
+{
+    AbstractGrid *grid = d->scene.grid();
+    if ( grid ) {
+        d->scene.setGrid( nullptr) ;
+    }
+    return grid;
+}
+
 /*! Sets the view to read-only mode if \a to is true. The default is
  * read/write if the model permits it.
  */
diff --git a/src/KGantt/kganttview.cpp b/src/KGantt/kganttview.cpp
--- a/src/KGantt/kganttview.cpp
+++ b/src/KGantt/kganttview.cpp
@@ -358,7 +358,7 @@
         d->gfxview = gv;
         d->gfxview->setModel(old->model()); // use the old ForwardingProxyModel
         d->setupGraphicsView();
-        d->gfxview->setGrid( old->grid() );
+        d->gfxview->setGrid( old->takeGrid() );
         delete old;
     }
 }