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#ifndef QMDIAREA_P_H

#define QMDIAREA_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 "qmdiarea.h"

#include "qmdisubwindow.h"

#ifndef QT_NO_MDIAREA

#include <QList>

#include <QRect>

#include <QPoint>

#include <QtGui/qapplication.h>

#include <private/qmdisubwindow_p.h>

#include <private/qabstractscrollarea_p.h>

QT_BEGIN_NAMESPACE

namespace QMdi {

class Rearranger

{

public:

    enum Type {

        RegularTiler,

        SimpleCascader,

        IconTiler

    };

    // Rearranges widgets relative to domain.

    virtual void rearrange(QList<QWidget *> &widgets, const QRect &domain) const = 0;

    virtual Type type() const = 0;

    virtual ~Rearranger() {}

};

class RegularTiler : public Rearranger

{

    // Rearranges widgets according to a regular tiling pattern

    // covering the entire domain.

    // Both positions and sizes may change.

    void rearrange(QList<QWidget *> &widgets, const QRect &domain) const;

    inline Type type() const { return Rearranger::RegularTiler; }

};

class SimpleCascader : public Rearranger

{

    // Rearranges widgets according to a simple, regular cascading pattern.

    // Widgets are resized to minimumSize.

    // Both positions and sizes may change.

    void rearrange(QList<QWidget *> &widgets, const QRect &domain) const;

    inline Type type() const { return Rearranger::SimpleCascader; }

};

class IconTiler : public Rearranger

{

    // Rearranges icons (assumed to be the same size) according to a regular

    // tiling pattern filling up the domain from the bottom.

    // Only positions may change.

    void rearrange(QList<QWidget *> &widgets, const QRect &domain) const;

    inline Type type() const { return Rearranger::IconTiler; }

};

class Placer

{

public:

    // Places the rectangle defined by 'size' relative to 'rects' and 'domain'.

    // Returns the position of the resulting rectangle.

    virtual QPoint place(

        const QSize &size, const QList<QRect> &rects, const QRect &domain) const = 0;

    virtual ~Placer() {}

};

class MinOverlapPlacer : public Placer

{

    QPoint place(const QSize &size, const QList<QRect> &rects, const QRect &domain) const;

    static int accumulatedOverlap(const QRect &source, const QList<QRect> &rects);

    static QRect findMinOverlapRect(const QList<QRect> &source, const QList<QRect> &rects);

    static void getCandidatePlacements(

        const QSize &size, const QList<QRect> &rects, const QRect &domain,

        QList<QRect> &candidates);

    static QPoint findBestPlacement(

        const QRect &domain, const QList<QRect> &rects, QList<QRect> &source);

    static void findNonInsiders(

        const QRect &domain, QList<QRect> &source, QList<QRect> &result);

    static void findMaxOverlappers(

        const QRect &domain, const QList<QRect> &source, QList<QRect> &result);

};

} // namespace QMdi

class QMdiAreaTabBar;

class QMdiAreaPrivate : public QAbstractScrollAreaPrivate

{

    Q_DECLARE_PUBLIC(QMdiArea)

public:

    QMdiAreaPrivate();

    // Variables.

    QMdi::Rearranger *cascader;

    QMdi::Rearranger *regularTiler;

    QMdi::Rearranger *iconTiler;

    QMdi::Placer *placer;

#ifndef QT_NO_RUBBERBAND

    QRubberBand *rubberBand;

#endif

    QMdiAreaTabBar *tabBar;

    QList<QMdi::Rearranger *> pendingRearrangements;

    QList< QPointer<QMdiSubWindow> > pendingPlacements;

    QList< QPointer<QMdiSubWindow> > childWindows;

    QList<int> indicesToActivatedChildren;

    QPointer<QMdiSubWindow> active;

    QPointer<QMdiSubWindow> aboutToBecomeActive;

    QBrush background;

    QMdiArea::WindowOrder activationOrder;

    QMdiArea::AreaOptions options;

    QMdiArea::ViewMode viewMode;

#ifndef QT_NO_TABBAR

    bool documentMode;

#endif

#ifndef QT_NO_TABWIDGET

    QTabWidget::TabShape tabShape;

    QTabWidget::TabPosition tabPosition;

#endif

    bool ignoreGeometryChange;

    bool ignoreWindowStateChange;

    bool isActivated;

    bool isSubWindowsTiled;

    bool showActiveWindowMaximized;

    bool tileCalledFromResizeEvent;

    bool updatesDisabledByUs;

    bool inViewModeChange;

    int indexToNextWindow;

    int indexToPreviousWindow;

    int indexToHighlighted;

    int indexToLastActiveTab;

    int resizeTimerId;

    int tabToPreviousTimerId;

    // Slots.

    void _q_deactivateAllWindows(QMdiSubWindow *aboutToActivate = 0);

    void _q_processWindowStateChanged(Qt::WindowStates oldState, Qt::WindowStates newState);

    void _q_currentTabChanged(int index);

    // Functions.

    void appendChild(QMdiSubWindow *child);

    void place(QMdi::Placer *placer, QMdiSubWindow *child);

    void rearrange(QMdi::Rearranger *rearranger);

    void arrangeMinimizedSubWindows();

    void activateWindow(QMdiSubWindow *child);

    void activateCurrentWindow();

    void activateHighlightedWindow();

    void emitWindowActivated(QMdiSubWindow *child);

    void resetActiveWindow(QMdiSubWindow *child = 0);

    void updateActiveWindow(int removedIndex, bool activeRemoved);

    void updateScrollBars();

    void internalRaise(QMdiSubWindow *child) const;

    bool scrollBarsEnabled() const;

    bool lastWindowAboutToBeDestroyed() const;

    void setChildActivationEnabled(bool enable = true, bool onlyNextActivationEvent = false) const;

    QRect resizeToMinimumTileSize(const QSize &minSubWindowSize, int subWindowCount);

    void scrollBarPolicyChanged(Qt::Orientation, Qt::ScrollBarPolicy); // reimp

    QMdiSubWindow *nextVisibleSubWindow(int increaseFactor, QMdiArea::WindowOrder,

                                        int removed = -1, int fromIndex = -1) const;

    void highlightNextSubWindow(int increaseFactor);

    QList<QMdiSubWindow *> subWindowList(QMdiArea::WindowOrder, bool reversed = false) const;

    void disconnectSubWindow(QObject *subWindow);

    void setViewMode(QMdiArea::ViewMode mode);

#ifndef QT_NO_TABBAR

    void updateTabBarGeometry();

    void refreshTabBar();

#endif

    inline void startResizeTimer()

    {

        Q_Q(QMdiArea);

        if (resizeTimerId > 0)

            q->killTimer(resizeTimerId);

        resizeTimerId = q->startTimer(200);

    }

    inline void startTabToPreviousTimer()

    {

        Q_Q(QMdiArea);

        if (tabToPreviousTimerId > 0)

            q->killTimer(tabToPreviousTimerId);

        tabToPreviousTimerId = q->startTimer(QApplication::keyboardInputInterval());

    }

    inline bool windowStaysOnTop(QMdiSubWindow *subWindow) const

    {

        if (!subWindow)

            return false;

        return subWindow->windowFlags() & Qt::WindowStaysOnTopHint;

    }

    inline bool isExplicitlyDeactivated(QMdiSubWindow *subWindow) const

    {

        if (!subWindow)

            return true;

        return subWindow->d_func()->isExplicitlyDeactivated;

    }

    inline void setActive(QMdiSubWindow *subWindow, bool active = true, bool changeFocus = true) const

    {

        if (subWindow)

            subWindow->d_func()->setActive(active, changeFocus);

    }

#ifndef QT_NO_RUBBERBAND

    inline void showRubberBandFor(QMdiSubWindow *subWindow)

    {

        if (!subWindow || !rubberBand)

            return;

        rubberBand->setGeometry(subWindow->geometry());

        rubberBand->raise();

        rubberBand->show();

    }

    inline void hideRubberBand()

    {

        if (rubberBand && rubberBand->isVisible())

            rubberBand->hide();

        indexToHighlighted = -1;

    }

#endif // QT_NO_RUBBERBAND

};

#endif // QT_NO_MDIAREA

QT_END_NAMESPACE

#endif // QMDIAREA_P_H