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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QDECORATION_QWS_H
#define QDECORATION_QWS_H

#include <QtGui/qregion.h>
#include <QtGui/qwidget.h>
#include <QtGui/qaction.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QPopupMenu;
class QMenu;

#ifndef QT_NO_ACTION
class QDecorationAction : public QAction
{
public:
    QDecorationAction(const QString &text, QObject* parent, int region)
        : QAction(text, parent), reg(region) {}
    int reg;
};
#endif // QT_NO_ACTION

/*
 Implements decoration styles
*/
class Q_GUI_EXPORT QDecoration
{
public:
    QDecoration() {}
    virtual ~QDecoration() {}

    /* AABBBBBBBBBBCC   Items in DecorationRegion:
       AijjjjjjjklmnC
       A            C   A = TopLeft      B = Top        C = TopRight
       D            E   D = Left                        E = Right
       D            E   F = BottomLeft   H = Bottom     G = BottomRight
       F            G   i = Menu         j = Title      k = Help
       FFHHHHHHHHHHGG   l = Minimize     m = Maximize   n = Close

    */

    enum DecorationRegion {
        None        = 0x0000000000, All      = 0x7fffffff,
        TopLeft     = 0x0000000001, Top      = 0x0000000002, TopRight    = 0x0000000004,
        Left        = 0x0000000008,                          Right       = 0x0000000010,
        BottomLeft  = 0x0000000020, Bottom   = 0x0000000040, BottomRight = 0x0000000080,
        Borders     = 0x00000000ff,
        Menu        = 0x0000000100, Title    = 0x0000000200, Help        = 0x0000000400,
        Minimize    = 0x0000000800, Maximize = 0x0000001000, Normalize   = 0x0000002000,
        Close       = 0x0000004000, Move     = 0x0000008000, Resize      = 0x0000010000
    };

    enum DecorationState { Normal = 0x04, Disabled = 0x08, Hover = 0x01, Pressed = 0x02 };

    virtual QRegion region(const QWidget *w, const QRect &rect, int decorationRegion = All ) = 0;
    QRegion region(const QWidget *w, int decorationRegion = All )
    { return region(w, w->rect(), decorationRegion); }
    virtual int regionAt(const QWidget *w, const QPoint &point);

    virtual void regionClicked(QWidget *widget, int region);
    virtual void regionDoubleClicked(QWidget *widget, int region);
#ifndef QT_NO_MENU
    virtual void buildSysMenu(QWidget *widget, QMenu *menu);
    void menuTriggered(QWidget *widget, QAction *action);
#endif

    static void startMove(QWidget *widget);
    static void startResize(QWidget *widget);

    virtual bool paint(QPainter *p, const QWidget *w, int decorationRegion = All,
                       DecorationState state = Normal) = 0;

};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QDECORATION_QWS_H