doc/src/snippets/modelview-subclasses/view.h
author eckhart.koppen@nokia.com
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/****************************************************************************
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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 documentation 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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#ifndef VIEW_H
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#define VIEW_H
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#include <QAbstractItemView>
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#include <QItemSelection>
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#include <QItemSelectionModel>
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#include <QModelIndex>
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#include <QRect>
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#include <QSize>
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#include <QWidget>
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class LinearView : public QAbstractItemView
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{
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    Q_OBJECT
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public:
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    LinearView(QWidget *parent = 0);
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    QRect itemViewportRect(const QModelIndex &index) const;
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    void ensureVisible(const QModelIndex &index);
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    QModelIndex itemAt(int x, int y) const;
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protected slots:
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    /*void dataChanged(const QModelIndex &topLeft, const QModelIndex
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    &bottomRight);*/
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    void rowsInserted(const QModelIndex &parent, int start, int end);
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    void rowsRemoved(const QModelIndex &parent, int start, int end);
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    /*void selectionChanged(const QItemSelection &deselected, const QItemSelection &selected);
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    void verticalScrollbarAction(int action);
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    void horizontalScrollbarAction(int action);*/
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protected:
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    void setSelection(const QRect&, QItemSelectionModel::SelectionFlags command);
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    QRect selectionViewportRect(const QItemSelection &selection) const;
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    QRect itemRect(const QModelIndex &item) const;
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    bool isIndexHidden(const QModelIndex &index) const;
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    int horizontalOffset() const;
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    int verticalOffset() const;
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    QModelIndex moveCursor(QAbstractItemView::CursorAction cursorAction,
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                           Qt::KeyboardModifiers modifiers);
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    void paintEvent(QPaintEvent *event);
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    void resizeEvent(QResizeEvent *event);
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    QSize sizeHint() const;
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private:
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    int rows(const QModelIndex &index = QModelIndex()) const;
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    void updateGeometries();
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};
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#endif