/****************************************************************************

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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** This file is part of the Qt3Support module of the Qt Toolkit.

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** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

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** GNU Lesser General Public License Usage

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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** If you have questions regarding the use of this file, please contact

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** $QT_END_LICENSE$

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****************************************************************************/

#ifndef Q3DOCKAREA_H

#define Q3DOCKAREA_H

#include <QtGui/qwidget.h>

#include <QtCore/qlist.h>

#include <Qt3Support/q3dockwindow.h>

#include <QtGui/qlayout.h>

#include <QtCore/qpointer.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Qt3SupportLight)

#ifndef QT_NO_MAINWINDOW

class QBoxLayout;

class Q3DockAreaLayout;

class QMouseEvent;

class Q3DockWindowResizeHandle;

class Q3DockAreaPrivate;

class QTextStream;

class Q_COMPAT_EXPORT Q3DockAreaLayout : public QLayout

{

    Q_OBJECT

    friend class Q3DockArea;

public:

    Q3DockAreaLayout(QWidget* parent, Qt::Orientation o, QList<Q3DockWindow *> *wl, int space = -1, int margin = -1, const char *name = 0)

        : QLayout(parent), orient(o), dirty(true), dockWindows(wl), parentWidget(parent)

    {

        if (space != -1)

            setSpacing(space);

        if (margin != -1)

            setMargin(margin);

        setObjectName(QString::fromAscii(name));

        init();

    }

    ~Q3DockAreaLayout() {}

    void addItem(QLayoutItem *) {}

    bool hasHeightForWidth() const;

    int heightForWidth(int) const;

    int widthForHeight(int) const;

    QSize sizeHint() const;

    QSize minimumSize() const;

    QLayoutItem *itemAt(int) const;

    QLayoutItem *takeAt(int);

    int count() const;

    Qt::Orientations expandingDirections() const { return Qt::Orientations(0); }

    void invalidate();

    Qt::Orientation orientation() const { return orient; }

    QList<QRect> lineList() const { return lines; }

    QList<Q3DockWindow *> lineStarts() const { return ls; }

protected:

    void setGeometry(const QRect&);

private:

    Q_DISABLE_COPY(Q3DockAreaLayout)

    void init();

    int layoutItems(const QRect&, bool testonly = false);

    Qt::Orientation orient;

    bool dirty;

    int cached_width, cached_height;

    int cached_hfw, cached_wfh;

    QList<Q3DockWindow *> *dockWindows;

    QWidget *parentWidget;

    QList<QRect> lines;

    QList<Q3DockWindow *> ls;

};

class Q_COMPAT_EXPORT Q3DockArea : public QWidget

{

    Q_OBJECT

    Q_ENUMS(HandlePosition)

    Q_PROPERTY(Qt::Orientation orientation READ orientation)

    Q_PROPERTY(int count READ count)

    Q_PROPERTY(bool empty READ isEmpty)

    Q_PROPERTY(HandlePosition handlePosition READ handlePosition)

    friend class Q3DockWindow;

    friend class Q3DockWindowResizeHandle;

    friend class Q3DockAreaLayout;

public:

    enum HandlePosition { Normal, Reverse };

    Q3DockArea(Qt::Orientation o, HandlePosition h = Normal, QWidget* parent=0, const char* name=0);

    ~Q3DockArea();

    void moveDockWindow(Q3DockWindow *w, const QPoint &globalPos, const QRect &rect, bool swap);

    void removeDockWindow(Q3DockWindow *w, bool makeFloating, bool swap, bool fixNewLines = true);

    void moveDockWindow(Q3DockWindow *w, int index = -1);

    bool hasDockWindow(Q3DockWindow *w, int *index = 0);

    void invalidNextOffset(Q3DockWindow *dw);

    Qt::Orientation orientation() const { return orient; }

    HandlePosition handlePosition() const { return hPos; }

    bool eventFilter(QObject *, QEvent *);

    bool isEmpty() const;

    int count() const;

    QList<Q3DockWindow *> dockWindowList() const;

    bool isDockWindowAccepted(Q3DockWindow *dw);

    void setAcceptDockWindow(Q3DockWindow *dw, bool accept);

public Q_SLOTS:

    void lineUp(bool keepNewLines);

private:

    struct DockWindowData

    {

        int index;

        int offset;

        int line;

        QSize fixedExtent;

        QPointer<Q3DockArea> area;

    };

    int findDockWindow(Q3DockWindow *w);

    int lineOf(int index);

    DockWindowData *dockWindowData(Q3DockWindow *w);

    void dockWindow(Q3DockWindow *dockWindow, DockWindowData *data);

    void updateLayout();

    void invalidateFixedSizes();

    int maxSpace(int hint, Q3DockWindow *dw);

    void setFixedExtent(int d, Q3DockWindow *dw);

    bool isLastDockWindow(Q3DockWindow *dw);

private:

    Q_DISABLE_COPY(Q3DockArea)

    Qt::Orientation orient;

    QList<Q3DockWindow *> dockWindows;

    Q3DockAreaLayout *layout;

    HandlePosition hPos;

    QList<Q3DockWindow *> forbiddenWidgets;

    Q3DockAreaPrivate *d;

};

#ifndef QT_NO_TEXTSTREAM

Q_COMPAT_EXPORT QTextStream &operator<<(QTextStream &, const Q3DockArea &);

Q_COMPAT_EXPORT QTextStream &operator>>(QTextStream &, Q3DockArea &);

#endif

#endif // QT_NO_MAINWINDOW

QT_END_NAMESPACE

QT_END_HEADER

#endif // Q3DOCKAREA_H