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qabstractscrollarea_p.h

/****************************************************************************
**
** Copyright (C) 1992-2007 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 sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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****************************************************************************/

#ifndef QABSTRACTSCROLLAREA_P_H
#define QABSTRACTSCROLLAREA_P_H

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

#include "private/qframe_p.h"
#include "qabstractscrollarea.h"

#ifndef QT_NO_SCROLLAREA

class QScrollBar;
class QAbstractScrollAreaScrollBarContainer;
class Q_AUTOTEST_EXPORT QAbstractScrollAreaPrivate: public QFramePrivate
{
    Q_DECLARE_PUBLIC(QAbstractScrollArea)

public:
    QAbstractScrollAreaPrivate();

    void replaceScrollBar(QScrollBar *scrollBar, Qt::Orientation orientation);

    QAbstractScrollAreaScrollBarContainer *scrollBarContainers[Qt::Vertical + 1];
    QScrollBar *hbar, *vbar;
    Qt::ScrollBarPolicy vbarpolicy, hbarpolicy;

    QWidget *viewport;
    QWidget *cornerWidget;
    QRect cornerPaintingRect;
#ifdef Q_WS_MAC
    QRect reverseCornerPaintingRect;
#endif
    int left, top, right, bottom; // viewport margin

    int xoffset, yoffset;

    void init();
    void layoutChildren();

    void _q_hslide(int);
    void _q_vslide(int);
    void _q_showOrHideScrollBars();

    virtual QPoint contentsOffset() const;

    inline bool viewportEvent(QEvent *event)
    { return q_func()->viewportEvent(event); }
    QObject *viewportFilter;
};

class QAbstractScrollAreaFilter : public QObject
{
    Q_OBJECT
public:
    QAbstractScrollAreaFilter(QAbstractScrollAreaPrivate *p) : d(p)
    { setObjectName(QLatin1String("qt_abstractscrollarea_filter")); }
    bool eventFilter(QObject *o, QEvent *e)
    { return (o == d->viewport ? d->viewportEvent(e) : false); }
private:
    QAbstractScrollAreaPrivate *d;
};

class QBoxLayout;
class QAbstractScrollAreaScrollBarContainer : public QWidget
{
public:
    enum LogicalPosition { LogicalLeft = 1, LogicalRight = 2 };

    QAbstractScrollAreaScrollBarContainer(Qt::Orientation orientation, QWidget *parent);
    void addWidget(QWidget *widget, LogicalPosition position);
    QWidgetList widgets(LogicalPosition position);
    void removeWidget(QWidget *widget);

    QScrollBar *scrollBar;
    QBoxLayout *layout;
private:
    int scrollBarLayoutIndex() const;

    Qt::Orientation orientation;
};

#endif // QT_NO_SCROLLAREA

#endif // QABSTRACTSCROLLAREA_P_H

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