Long live Qt 4.5!

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diff --git a/src/gui/itemviews/qitemselectionmodel.h b/src/gui/itemviews/qitemselectionmodel.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QITEMSELECTIONMODEL_H
+#define QITEMSELECTIONMODEL_H
+
+#include <QtCore/qset.h>
+#include <QtCore/qvector.h>
+#include <QtCore/qlist.h>
+#include <QtCore/qabstractitemmodel.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+#ifndef QT_NO_ITEMVIEWS
+
+class Q_GUI_EXPORT QItemSelectionRange
+{
+
+public:
+    inline QItemSelectionRange() {}
+    inline QItemSelectionRange(const QItemSelectionRange &other)
+        : tl(other.tl), br(other.br) {}
+    inline QItemSelectionRange(const QModelIndex &topLeft, const QModelIndex &bottomRight);
+    explicit inline QItemSelectionRange(const QModelIndex &index)
+        { tl = index; br = tl; }
+
+    inline int top() const { return tl.row(); }
+    inline int left() const { return tl.column(); }
+    inline int bottom() const { return br.row(); }
+    inline int right() const { return br.column(); }
+    inline int width() const { return br.column() - tl.column() + 1; }
+    inline int height() const { return br.row() - tl.row() + 1; }
+
+    inline QModelIndex topLeft() const { return QModelIndex(tl); }
+    inline QModelIndex bottomRight() const { return QModelIndex(br); }
+    inline QModelIndex parent() const { return tl.parent(); }
+    inline const QAbstractItemModel *model() const { return tl.model(); }
+
+    inline bool contains(const QModelIndex &index) const
+    {
+        return (parent() == index.parent()
+                && tl.row() <= index.row() && tl.column() <= index.column()
+                && br.row() >= index.row() && br.column() >= index.column());
+    }
+
+    inline bool contains(int row, int column, const QModelIndex &parentIndex) const
+    {
+        return (parent() == parentIndex
+                && tl.row() <= row && tl.column() <= column
+                && br.row() >= row && br.column() >= column);
+    }
+
+    bool intersects(const QItemSelectionRange &other) const;
+    QItemSelectionRange intersect(const QItemSelectionRange &other) const; // ### Qt 5: make QT4_SUPPORT
+    inline QItemSelectionRange intersected(const QItemSelectionRange &other) const
+        { return intersect(other); }
+
+    inline bool operator==(const QItemSelectionRange &other) const
+        { return (tl == other.tl && br == other.br); }
+    inline bool operator!=(const QItemSelectionRange &other) const
+        { return !operator==(other); }
+
+    inline bool isValid() const
+    {
+        return (tl.isValid() && br.isValid() && tl.parent() == br.parent()
+                && top() <= bottom() && left() <= right());
+    }
+
+    QModelIndexList indexes() const;
+
+private:
+    QPersistentModelIndex tl, br;
+};
+Q_DECLARE_TYPEINFO(QItemSelectionRange, Q_MOVABLE_TYPE);
+
+inline QItemSelectionRange::QItemSelectionRange(const QModelIndex &atopLeft,
+                                                const QModelIndex &abottomRight)
+{ tl = atopLeft; br = abottomRight; }
+
+class QItemSelection;
+class QItemSelectionModelPrivate;
+
+class Q_GUI_EXPORT QItemSelectionModel : public QObject
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QItemSelectionModel)
+    Q_FLAGS(SelectionFlags)
+
+public:
+
+    enum SelectionFlag {
+        NoUpdate       = 0x0000,
+        Clear          = 0x0001,
+        Select         = 0x0002,
+        Deselect       = 0x0004,
+        Toggle         = 0x0008,
+        Current        = 0x0010,
+        Rows           = 0x0020,
+        Columns        = 0x0040,
+        SelectCurrent  = Select | Current,
+        ToggleCurrent  = Toggle | Current,
+        ClearAndSelect = Clear | Select
+    };
+
+    Q_DECLARE_FLAGS(SelectionFlags, SelectionFlag)
+
+    explicit QItemSelectionModel(QAbstractItemModel *model);
+    explicit QItemSelectionModel(QAbstractItemModel *model, QObject *parent);
+    virtual ~QItemSelectionModel();
+
+    QModelIndex currentIndex() const;
+
+    bool isSelected(const QModelIndex &index) const;
+    bool isRowSelected(int row, const QModelIndex &parent) const;
+    bool isColumnSelected(int column, const QModelIndex &parent) const;
+
+    bool rowIntersectsSelection(int row, const QModelIndex &parent) const;
+    bool columnIntersectsSelection(int column, const QModelIndex &parent) const;
+
+    bool hasSelection() const;
+
+    QModelIndexList selectedIndexes() const;
+    QModelIndexList selectedRows(int column = 0) const;
+    QModelIndexList selectedColumns(int row = 0) const;
+    const QItemSelection selection() const;
+
+    const QAbstractItemModel *model() const;
+
+public Q_SLOTS:
+    void setCurrentIndex(const QModelIndex &index, QItemSelectionModel::SelectionFlags command);
+    virtual void select(const QModelIndex &index, QItemSelectionModel::SelectionFlags command);
+    virtual void select(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command);
+    virtual void clear();
+    virtual void reset();
+
+    void clearSelection();
+
+Q_SIGNALS:
+    void selectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
+    void currentChanged(const QModelIndex &current, const QModelIndex &previous);
+    void currentRowChanged(const QModelIndex &current, const QModelIndex &previous);
+    void currentColumnChanged(const QModelIndex &current, const QModelIndex &previous);
+
+protected:
+    QItemSelectionModel(QItemSelectionModelPrivate &dd, QAbstractItemModel *model);
+    void emitSelectionChanged(const QItemSelection &newSelection, const QItemSelection &oldSelection);
+
+private:
+    Q_DISABLE_COPY(QItemSelectionModel)
+    Q_PRIVATE_SLOT(d_func(), void _q_columnsAboutToBeRemoved(const QModelIndex&, int, int))
+    Q_PRIVATE_SLOT(d_func(), void _q_rowsAboutToBeRemoved(const QModelIndex&, int, int))
+    Q_PRIVATE_SLOT(d_func(), void _q_columnsAboutToBeInserted(const QModelIndex&, int, int))
+    Q_PRIVATE_SLOT(d_func(), void _q_rowsAboutToBeInserted(const QModelIndex&, int, int))
+    Q_PRIVATE_SLOT(d_func(), void _q_layoutAboutToBeChanged())
+    Q_PRIVATE_SLOT(d_func(), void _q_layoutChanged())
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(QItemSelectionModel::SelectionFlags)
+
+// dummy implentation of qHash() necessary for instantiating QList<QItemSelectionRange>::toSet() with MSVC
+inline uint qHash(const QItemSelectionRange &) { return 0; }
+
+class Q_GUI_EXPORT QItemSelection : public QList<QItemSelectionRange>
+{
+public:
+    QItemSelection() {}
+    QItemSelection(const QModelIndex &topLeft, const QModelIndex &bottomRight);
+    void select(const QModelIndex &topLeft, const QModelIndex &bottomRight);
+    bool contains(const QModelIndex &index) const;
+    QModelIndexList indexes() const;
+    void merge(const QItemSelection &other, QItemSelectionModel::SelectionFlags command);
+    static void split(const QItemSelectionRange &range,
+                      const QItemSelectionRange &other,
+                      QItemSelection *result);
+};
+
+#ifndef QT_NO_DEBUG_STREAM
+Q_GUI_EXPORT QDebug operator<<(QDebug, const QItemSelectionRange &);
+#endif
+
+#endif // QT_NO_ITEMVIEWS
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QITEMSELECTIONMODEL_H