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diff --git a/libgroupview/src/kcategorizedview_p.h b/libgroupview/src/kcategorizedview_p.h
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+/**
+  * This file is part of the KDE project
+  * Copyright (C) 2007, 2009 Rafael Fernández López <ereslibre@kde.org>
+  *
+  * This library is free software; you can redistribute it and/or
+  * modify it under the terms of the GNU Library General Public
+  * License as published by the Free Software Foundation; either
+  * version 2 of the License, or (at your option) any later version.
+  *
+  * This library is distributed in the hope that it will be useful,
+  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  * Library General Public License for more details.
+  *
+  * You should have received a copy of the GNU Library General Public License
+  * along with this library; see the file COPYING.LIB.  If not, write to
+  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+  * Boston, MA 02110-1301, USA.
+  */
+
+#ifndef KCATEGORIZEDVIEW_P_H
+#define KCATEGORIZEDVIEW_P_H
+
+class KCategorizedSortFilterProxyModel;
+class KCategoryDrawer;
+class KCategoryDrawerV2;
+class KCategoryDrawerV3;
+
+/**
+  * @internal
+  */
+class KCategorizedView::Private
+{
+public:
+    struct Block;
+    struct Item;
+
+    Private(KCategorizedView *q);
+    ~Private();
+
+    /**
+      * @return whether this view has all required elements to be categorized.
+      */
+    bool isCategorized() const;
+
+    /**
+      * @return the block rect for the representative @p representative.
+      */
+    QStyleOptionViewItemV4 blockRect(const QModelIndex &representative);
+
+    /**
+      * Returns the first and last element that intersects with rect.
+      *
+      * @note see that here we cannot take out items between first and last (as we could
+      *       do with the rubberband).
+      *
+      * Complexity: O(log(n)) where n is model()->rowCount().
+      */
+    QPair<QModelIndex, QModelIndex> intersectingIndexesWithRect(const QRect &rect) const;
+
+    /**
+      * Returns the position of the block of @p category.
+      *
+      * Complexity: O(n) where n is the number of different categories when the block has been
+      *             marked as in quarantine. O(1) the rest of the times (the vast majority).
+      */
+    QPoint blockPosition(const QString &category);
+
+    /**
+      * Returns the height of the block determined by @p category.
+      */
+    int blockHeight(const QString &category);
+
+    /**
+      * Returns the actual viewport width.
+      */
+    int viewportWidth() const;
+
+    /**
+      * Marks all elements as in quarantine.
+      *
+      * Complexity: O(n) where n is model()->rowCount().
+      *
+      * @warning this is an expensive operation
+      */
+    void regenerateAllElements();
+
+    /**
+      * Update internal information, and keep sync with the real information that the model contains.
+      */
+    void rowsInserted(const QModelIndex &parent, int start, int end);
+
+    /**
+      * Returns @p rect in viewport terms, taking in count horizontal and vertical offsets.
+      */
+    QRect mapToViewport(const QRect &rect) const;
+
+    /**
+      * Returns @p rect in absolute terms, converted from viewport position.
+      */
+    QRect mapFromViewport(const QRect &rect) const;
+
+    /**
+      * Returns the height of the highest element in last row. This is only applicable if there is
+      * no grid set and uniformItemSizes is false.
+      *
+      * @param block in which block are we searching. Necessary to stop the search if we hit the
+      *              first item in this block.
+      */
+    int highestElementInLastRow(const Block &block) const;
+
+    /**
+      * Returns whether the view has a valid grid size.
+      */
+    bool hasGrid() const;
+
+    /**
+      * Returns the category for the given index.
+      */
+    QString categoryForIndex(const QModelIndex &index) const;
+
+    /**
+      * Updates the visual rect for item when flow is LeftToRight.
+      */
+    void leftToRightVisualRect(const QModelIndex &index, Item &item,
+                               const Block &block, const QPoint &blockPos) const;
+
+    /**
+      * Updates the visual rect for item when flow is TopToBottom.
+      * @note we only support viewMode == ListMode in this case.
+      */
+    void topToBottomVisualRect(const QModelIndex &index, Item &item,
+                               const Block &block, const QPoint &blockPos) const;
+
+    /**
+      * Called when expand or collapse has been clicked on the category drawer.
+      */
+    void _k_slotCollapseOrExpandClicked(QModelIndex);
+
+    KCategorizedView *q;
+    KCategorizedSortFilterProxyModel *proxyModel;
+    KCategoryDrawer *categoryDrawer;
+    int categorySpacing;
+    bool alternatingBlockColors;
+    bool collapsibleBlocks;
+
+    Block *hoveredBlock;
+    QString hoveredCategory;
+    QModelIndex hoveredIndex;
+
+    QPoint pressedPosition;
+    QRect rubberBandRect;
+
+    QHash<QString, Block> blocks;
+};
+
+#endif // KCATEGORIZEDVIEW_P_H