qstandarditemmodel_p.h

来自「QT 开发环境里面一个很重要的文件」· C头文件 代码 · 共 174 行

/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 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 GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef QSTANDARDITEMMODEL_P_H
#define QSTANDARDITEMMODEL_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "private/qabstractitemmodel_p.h"

#ifndef QT_NO_STANDARDITEMMODEL

#include <private/qwidgetitemdata_p.h>
#include <QtCore/qlist.h>
#include <QtCore/qpair.h>
#include <QtCore/qstack.h>
#include <QtCore/qvariant.h>
#include <QtCore/qvector.h>

class QStandardItemPrivate
{
    Q_DECLARE_PUBLIC(QStandardItem)
public:
    inline QStandardItemPrivate()
        : model(0),
          parent(0),
          flags(Qt::ItemIsSelectable|Qt::ItemIsEnabled|Qt::ItemIsEditable
                |Qt::ItemIsDragEnabled|Qt::ItemIsDropEnabled),
          rows(0),
          columns(0)
        { }
    virtual ~QStandardItemPrivate();

    int childIndex(int row, int column) const;
    inline int childIndex(const QStandardItem *child) const {
        return children.indexOf(const_cast<QStandardItem*>(child));
    }
    QPair<int, int> itemPosition(const QStandardItem *item) const;
    void setChild(int row, int column, QStandardItem *item,
                  bool emitChanged = false);
    inline int rowCount() const {
        return rows;
    }
    inline int columnCount() const {
        return columns;
    }
    void childDeleted(QStandardItem *child);

    inline void setModel(QStandardItemModel *mod) {
        if (children.isEmpty()) {
            model = mod;
        } else {
            QStack<QStandardItem*> stack;
            stack.push(q_ptr);
            while (!stack.isEmpty()) {
                QStandardItem *itm = stack.pop();
                itm->d_func()->model = mod;
                const QVector<QStandardItem*> &childList = itm->d_func()->children;
                for (int i = 0; i < childList.count(); ++i) {
                    QStandardItem *chi = childList.at(i);
                    if (chi)
                        stack.push(chi);
                }
            }
        }
    }

    inline void setParentAndModel(
        QStandardItem *par,
        QStandardItemModel *mod) {
        parent = par;
        setModel(mod);
    }

    void changeFlags(bool enable, Qt::ItemFlags f);
    void setItemData(const QMap<int, QVariant> &roles);
    const QMap<int, QVariant> itemData() const;

    bool insertRows(int row, int count, const QList<QStandardItem*> &items);
    bool insertColumns(int column, int count, const QList<QStandardItem*> &items);

    void sortChildren(int column, Qt::SortOrder order);

    QStandardItemModel *model;
    QStandardItem *parent;
    QVector<QWidgetItemData> values;
    Qt::ItemFlags flags;
    QVector<QStandardItem*> children;
    int rows;
    int columns;

    QStandardItem *q_ptr;
};

class QStandardItemModelPrivate : public QAbstractItemModelPrivate
{
    Q_DECLARE_PUBLIC(QStandardItemModel)

public:
    QStandardItemModelPrivate();
    virtual ~QStandardItemModelPrivate();

    void init();

    inline QStandardItem *createItem() const {
        return itemPrototype ? itemPrototype->clone() : new QStandardItem;
    }

    inline QStandardItem *itemFromIndex(const QModelIndex &index) const {
        Q_Q(const QStandardItemModel);
        if (!index.isValid())
            return root;
        if (index.model() != q)
            return 0;
        QStandardItem *parent = static_cast<QStandardItem*>(index.internalPointer());
        if (parent == 0)
            return 0;
        return parent->child(index.row(), index.column());
    }

    void sort(QStandardItem *parent, int column, Qt::SortOrder order);
    void itemChanged(QStandardItem *item);
    void rowsAboutToBeInserted(QStandardItem *parent, int start, int end);
    void columnsAboutToBeInserted(QStandardItem *parent, int start, int end);
    void rowsAboutToBeRemoved(QStandardItem *parent, int start, int end);
    void columnsAboutToBeRemoved(QStandardItem *parent, int start, int end);
    void rowsInserted(QStandardItem *parent, int row, int count);
    void columnsInserted(QStandardItem *parent, int column, int count);
    void rowsRemoved(QStandardItem *parent, int row, int count);
    void columnsRemoved(QStandardItem *parent, int column, int count);

    void _q_emitItemChanged(const QModelIndex &topLeft,
                            const QModelIndex &bottomRight);

    QVector<QStandardItem*> columnHeaderItems;
    QVector<QStandardItem*> rowHeaderItems;
    QStandardItem *root;
    const QStandardItem *itemPrototype;
    int sortRole;
};

#endif // QT_NO_STANDARDITEMMODEL

#endif // QSTANDARDITEMMODEL_P_H