/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef QTREEWIDGET_P_H+
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#define QTREEWIDGET_P_H+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API. This header file may change+
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// from version to version without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#include <QtCore/qabstractitemmodel.h>+
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#include <private/qabstractitemmodel_p.h>+
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#include <QtCore/qpair.h>+
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#include <QtCore/qbasictimer.h>+
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#include <QtGui/qtreewidget.h>+
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#include <private/qtreeview_p.h>+
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#include <QtGui/qheaderview.h>+
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+
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#ifndef QT_NO_TREEWIDGET+
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+
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QT_BEGIN_NAMESPACE+
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+
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class QTreeWidgetItem;+
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class QTreeWidgetItemIterator;+
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class QTreeModelPrivate;+
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+
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class QTreeModel : public QAbstractItemModel+
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{+
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    Q_OBJECT+
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    friend class QTreeWidget;+
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    friend class QTreeWidgetPrivate;+
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    friend class QTreeWidgetItem;+
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    friend class QTreeWidgetItemPrivate;+
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    friend class QTreeWidgetItemIterator;+
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    friend class QTreeWidgetItemIteratorPrivate;+
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+
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public:+
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    explicit QTreeModel(int columns = 0, QTreeWidget *parent = 0);+
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    ~QTreeModel();+
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+
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    inline QTreeWidget *view() const+
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        { return qobject_cast<QTreeWidget*>(QObject::parent()); }+
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+
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    void clear();+
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    void setColumnCount(int columns);+
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+
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    QTreeWidgetItem *item(const QModelIndex &index) const;+
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    void itemChanged(QTreeWidgetItem *item);+
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+
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    QModelIndex index(const QTreeWidgetItem *item, int column) const;+
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    QModelIndex index(int row, int column, const QModelIndex &parent) const;+
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    QModelIndex parent(const QModelIndex &child) const;+
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    int rowCount(const QModelIndex &parent) const;+
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    int columnCount(const QModelIndex &parent = QModelIndex()) const;+
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    bool hasChildren(const QModelIndex &parent) const;+
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+
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    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;+
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    bool setData(const QModelIndex &index, const QVariant &value, int role);+
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+
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    QMap<int, QVariant> itemData(const QModelIndex &index) const;+
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+
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    QVariant headerData(int section, Qt::Orientation orientation, int role) const;+
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    bool setHeaderData(int section, Qt::Orientation orientation, const QVariant &value,+
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                       int role);+
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+
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    Qt::ItemFlags flags(const QModelIndex &index) const;+
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+
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    void sort(int column, Qt::SortOrder order);+
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    void ensureSorted(int column, Qt::SortOrder order,+
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                      int start, int end, const QModelIndex &parent);+
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    static bool itemLessThan(const QPair<QTreeWidgetItem*,int> &left,+
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                             const QPair<QTreeWidgetItem*,int> &right);+
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    static bool itemGreaterThan(const QPair<QTreeWidgetItem*,int> &left,+
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                                const QPair<QTreeWidgetItem*,int> &right);+
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    static QList<QTreeWidgetItem*>::iterator sortedInsertionIterator(+
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        const QList<QTreeWidgetItem*>::iterator &begin,+
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        const QList<QTreeWidgetItem*>::iterator &end,+
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        Qt::SortOrder order, QTreeWidgetItem *item);+
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+
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    bool insertRows(int row, int count, const QModelIndex &);+
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    bool insertColumns(int column, int count, const QModelIndex &);+
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+
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    bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());+
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+
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    // dnd+
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    QStringList mimeTypes() const;+
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    QMimeData *mimeData(const QModelIndexList &indexes) const;+
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    bool dropMimeData(const QMimeData *data, Qt::DropAction action,+
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                      int row, int column, const QModelIndex &parent);+
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    Qt::DropActions supportedDropActions() const;+
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+
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    QMimeData *internalMimeData() const;+
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+
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    inline QModelIndex createIndexFromItem(int row, int col, QTreeWidgetItem *item) const+
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    { return createIndex(row, col, item); }+
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+
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protected:+
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    QTreeModel(QTreeModelPrivate &, QTreeWidget *parent = 0);+
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    void emitDataChanged(QTreeWidgetItem *item, int column);+
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    void beginInsertItems(QTreeWidgetItem *parent, int row, int count);+
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    void endInsertItems();+
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    void beginRemoveItems(QTreeWidgetItem *parent, int row, int count);+
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    void endRemoveItems();+
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    void sortItems(QList<QTreeWidgetItem*> *items, int column, Qt::SortOrder order);+
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    void timerEvent(QTimerEvent *);+
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+
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private:+
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    QTreeWidgetItem *rootItem;+
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    QTreeWidgetItem *headerItem;+
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+
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    mutable QModelIndexList cachedIndexes;+
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    QList<QTreeWidgetItemIterator*> iterators;+
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+
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    mutable QBasicTimer sortPendingTimer;+
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    mutable bool skipPendingSort; //while doing internal operation we don't care about sorting+
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    bool inline executePendingSort() const;+
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+
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    bool isChanging() const;+
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+
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private:+
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    Q_DECLARE_PRIVATE(QTreeModel)+
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public:+
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    struct SkipSorting+
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    {+
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        const QTreeModel * const model;+
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        const bool previous;+
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        SkipSorting(const QTreeModel *m) : model(m), previous(model->skipPendingSort)+
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        { model->skipPendingSort = true; }+
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        ~SkipSorting() { model->skipPendingSort = previous; }+
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    };+
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    friend struct SkipSorting;+
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};+
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+
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QT_BEGIN_INCLUDE_NAMESPACE+
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#include "private/qabstractitemmodel_p.h"+
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QT_END_INCLUDE_NAMESPACE+
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+
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class QTreeModelPrivate : public QAbstractItemModelPrivate+
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{+
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    Q_DECLARE_PUBLIC(QTreeModel)+
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};+
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+
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class QTreeWidgetItemPrivate+
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{+
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public:+
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    QTreeWidgetItemPrivate(QTreeWidgetItem *item)+
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        : q(item), disabled(false), selected(false), rowGuess(-1), policy(QTreeWidgetItem::DontShowIndicatorWhenChildless) {}+
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    void propagateDisabled(QTreeWidgetItem *item);+
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    void sortChildren(int column, Qt::SortOrder order, bool climb);+
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    QTreeWidgetItem *q;+
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    QVariantList display;+
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    uint disabled : 1;+
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    uint selected : 1;+
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    int rowGuess;+
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    QTreeWidgetItem::ChildIndicatorPolicy policy;+
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};+
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+
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+
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inline bool QTreeModel::executePendingSort() const+
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{+
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    if (!skipPendingSort && sortPendingTimer.isActive() && !isChanging()) {+
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        sortPendingTimer.stop();+
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        int column = view()->header()->sortIndicatorSection();+
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        Qt::SortOrder order = view()->header()->sortIndicatorOrder();+
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        QTreeModel *that = const_cast<QTreeModel*>(this);+
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        that->sort(column, order);+
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        return true;+
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    }+
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    return false;+
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}+
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+
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class QTreeWidgetPrivate : public QTreeViewPrivate+
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{+
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    friend class QTreeModel;+
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    Q_DECLARE_PUBLIC(QTreeWidget)+
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public:+
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    QTreeWidgetPrivate() : QTreeViewPrivate(), explicitSortColumn(-1) {}+
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    inline QTreeModel *treeModel() const { return qobject_cast<QTreeModel*>(model); }+
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    inline QModelIndex index(const QTreeWidgetItem *item, int column = 0) const+
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        { return treeModel()->index(item, column); }+
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    inline QTreeWidgetItem *item(const QModelIndex &index) const+
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        { return treeModel()->item(index); }+
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    void _q_emitItemPressed(const QModelIndex &index);+
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    void _q_emitItemClicked(const QModelIndex &index);+
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    void _q_emitItemDoubleClicked(const QModelIndex &index);+
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    void _q_emitItemActivated(const QModelIndex &index);+
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    void _q_emitItemEntered(const QModelIndex &index);+
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    void _q_emitItemChanged(const QModelIndex &index);+
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    void _q_emitItemExpanded(const QModelIndex &index);+
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    void _q_emitItemCollapsed(const QModelIndex &index);+
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    void _q_emitCurrentItemChanged(const QModelIndex &previous, const QModelIndex &index);+
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    void _q_sort();+
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    void _q_dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);+
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    void _q_selectionChanged(const QItemSelection &selected, const QItemSelection &deselected);+
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+
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     // used by QTreeWidgetItem::sortChildren to make sure the column argument is used+
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    int explicitSortColumn;+
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};+
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+
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QT_END_NAMESPACE+
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+
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#endif // QT_NO_TREEWIDGET+
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+
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#endif // QTREEWIDGET_P_H+
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