diff --git a/src/gui/Layout.cpp b/src/gui/Layout.cpp
index fe673ab6..67ccf861 100644
--- a/src/gui/Layout.cpp
+++ b/src/gui/Layout.cpp
@@ -436,6 +436,15 @@ void Layout::scrollRelativ(int x, int y)
 	this->scrollVertical->scroll(y);
 }
 
+void Layout::scrollAbs(int x, int y)
+{
+	XOJ_CHECK_TYPE(Layout);
+
+	// TODO Check if really working
+	this->scrollHorizontal->setValue(x);
+	this->scrollVertical->setValue(y);
+}
+
 double Layout::getVisiblePageTop(size_t page)
 {
 	XOJ_CHECK_TYPE(Layout);
diff --git a/src/gui/Layout.h b/src/gui/Layout.h
index fafc33ee..6fffa18f 100644
--- a/src/gui/Layout.h
+++ b/src/gui/Layout.h
@@ -19,6 +19,12 @@
 class PageView;
 class XournalView;
 
+/**
+ * @brief The Layout manager for the XournalWidget
+ *
+ * This class manages the layout of the PageView%s contained
+ * in the XournalWidget
+ */
 class Layout : public ScrollbarListener
 {
 public:
@@ -26,10 +32,35 @@ public:
 	virtual ~Layout();
 
 public:
+	/**
+	 * Adjusts the layout size to the given values
+	 */
 	void setSize(int widgetWidth, int widgetHeight);
+
+	/**
+	 * Increases the adjustments by the given amounts
+	 */
 	void scrollRelativ(int x, int y);
+
+	/**
+	 * Changes the adjustments by absolute amounts (for pinch-to-zoom)
+	 */
+	void scrollAbs(int x, int y);
+
+	/**
+	 * Handle a scroll event
+	 */
 	bool scrollEvent(GdkEventScroll* event);
+
+	/**
+	 * Changes the adjustments in such a way as to make sure that
+	 * the given Rectangle is visible
+	 *
+	 * @remark If the given Rectangle won't fit into the scrolled window
+	 *         then only its top left corner will be visible
+	 */
 	void ensureRectIsVisible(int x, int y, int width, int height);
+
 	double getVisiblePageTop(size_t page);
 	double getDisplayHeight();
 
diff --git a/src/gui/XournalView.cpp b/src/gui/XournalView.cpp
index 9b0fe1af..5e4734ef 100644
--- a/src/gui/XournalView.cpp
+++ b/src/gui/XournalView.cpp
@@ -791,11 +791,7 @@ void XournalView::pageInserted(size_t page)
 	Layout* layout = gtk_xournal_get_layout(this->widget);
 	layout->layoutPages();
 
-#if GTK3_ENABLED
-	layout->updateCurrentPage();
-#else
 	layout->checkSelectedPage();
-#endif
 }
 
 double XournalView::getZoom()
diff --git a/src/gui/widgets/XournalWidget.h b/src/gui/widgets/XournalWidget.h
index 0179029a..67b8833a 100644
--- a/src/gui/widgets/XournalWidget.h
+++ b/src/gui/widgets/XournalWidget.h
@@ -15,9 +15,9 @@
 
 G_BEGIN_DECLS
 
-#define GTK_XOURNAL(obj) GTK_CHECK_CAST(obj, gtk_xournal_get_type (), GtkXournal)
+#define GTK_XOURNAL(obj) G_TYPE_CHECK_INSTANCE_CAST(obj, gtk_xournal_get_type (), GtkXournal)
 #define GTK_XOURNAL_CLASS(klass) GTK_CHECK_CLASS_CAST(klass, gtk_xournal_get_type(), GtkXournalClass)
-#define GTK_IS_XOURNAL(obj) GTK_CHECK_TYPE(obj, gtk_xournal_get_type())
+#define GTK_IS_XOURNAL(obj) G_TYPE_CHECK_INSTANCE_TYPE(obj, gtk_xournal_get_type())
 
 class EditSelection;
 class Layout;