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#ifndef QTABBAR_P_H

#define QTABBAR_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 "qtabbar.h"

#include "private/qwidget_p.h"

#include <qicon.h>

#include <qtoolbutton.h>

#include <qdebug.h>

#include <qvariantanimation.h>

#ifndef QT_NO_TABBAR

#define ANIMATION_DURATION 250

#include <qstyleoption.h>

QT_BEGIN_NAMESPACE

class QTabBarPrivate  : public QWidgetPrivate

{

    Q_DECLARE_PUBLIC(QTabBar)

public:

    QTabBarPrivate()

        :currentIndex(-1), pressedIndex(-1), shape(QTabBar::RoundedNorth), layoutDirty(false),

        drawBase(true), scrollOffset(0), useScrollButtonsSetByUser(false) , expanding(true), closeButtonOnTabs(false),

        selectionBehaviorOnRemove(QTabBar::SelectRightTab), paintWithOffsets(true), movable(false),

        dragInProgress(false), documentMode(false), movingTab(0)

#ifdef Q_WS_MAC

        , previousPressedIndex(-1)

#endif

        {}

    int currentIndex;

    int pressedIndex;

    QTabBar::Shape shape;

    bool layoutDirty;

    bool drawBase;

    int scrollOffset;

    struct Tab {

        inline Tab(const QIcon &ico, const QString &txt)

            : enabled(true) , shortcutId(0), text(txt), icon(ico),

            leftWidget(0), rightWidget(0), lastTab(-1), dragOffset(0)

#ifndef QT_NO_ANIMATION

            , animation(0)

#endif //QT_NO_ANIMATION

        {}

        bool operator==(const Tab &other) const { return &other == this; }

        bool enabled;

        int shortcutId;

        QString text;

#ifndef QT_NO_TOOLTIP

        QString toolTip;

#endif

#ifndef QT_NO_WHATSTHIS

        QString whatsThis;

#endif

        QIcon icon;

        QRect rect;

        QRect minRect;

        QRect maxRect;

        QColor textColor;

        QVariant data;

        QWidget *leftWidget;

        QWidget *rightWidget;

        int lastTab;

        int dragOffset;

#ifndef QT_NO_ANIMATION

        ~Tab() { delete animation; }

        struct TabBarAnimation : public QVariantAnimation {

            TabBarAnimation(Tab *t, QTabBarPrivate *_priv) : tab(t), priv(_priv)

            { setEasingCurve(QEasingCurve::InOutQuad); }

            void updateCurrentValue(const QVariant &current)

            { priv->moveTab(priv->tabList.indexOf(*tab), current.toInt()); }

            void updateState(State, State newState)

            { if (newState == Stopped) priv->moveTabFinished(priv->tabList.indexOf(*tab)); }

        private:

            //these are needed for the callbacks

            Tab *tab;

            QTabBarPrivate *priv;

        } *animation;

        void startAnimation(QTabBarPrivate *priv, int duration) {

            if (!animation)

                animation = new TabBarAnimation(this, priv);

            animation->setStartValue(dragOffset);

            animation->setEndValue(0);

            animation->setDuration(duration);

            animation->start();

        }

#else

        void startAnimation(QTabBarPrivate *priv, int duration)

        { Q_UNUSED(duration); priv->moveTabFinished(priv->tabList.indexOf(*this)); }

#endif //QT_NO_ANIMATION

    };

    QList<Tab> tabList;

    int calculateNewPosition(int from, int to, int index) const;

    void slide(int from, int to);

    void init();

    int extraWidth() const;

    Tab *at(int index);

    const Tab *at(int index) const;

    int indexAtPos(const QPoint &p) const;

    inline bool validIndex(int index) const { return index >= 0 && index < tabList.count(); }

    void setCurrentNextEnabledIndex(int offset);

    QSize minimumTabSizeHint(int index);

    QToolButton* rightB; // right or bottom

    QToolButton* leftB; // left or top

    void _q_scrollTabs();

    void _q_closeTab();

    void moveTab(int index, int offset);

    void moveTabFinished(int index);

    QRect hoverRect;

    void refresh();

    void layoutTabs();

    void layoutWidgets(int index = -1);

    void layoutTab(int index);

    void updateMacBorderMetrics();

    void setupMovableTab();

    void makeVisible(int index);

    QSize iconSize;

    Qt::TextElideMode elideMode;

    bool useScrollButtons;

    bool useScrollButtonsSetByUser;

    bool expanding;

    bool closeButtonOnTabs;

    QTabBar::SelectionBehavior selectionBehaviorOnRemove;

    QPoint dragStartPosition;

    bool paintWithOffsets;

    bool movable;

    bool dragInProgress;

    bool documentMode;

    QWidget *movingTab;

#ifdef Q_WS_MAC

    int previousPressedIndex;

#endif

    // shared by tabwidget and qtabbar

    static void initStyleBaseOption(QStyleOptionTabBarBaseV2 *optTabBase, QTabBar *tabbar, QSize size)

    {

        QStyleOptionTab tabOverlap;

        tabOverlap.shape = tabbar->shape();

        int overlap = tabbar->style()->pixelMetric(QStyle::PM_TabBarBaseOverlap, &tabOverlap, tabbar);

        QWidget *theParent = tabbar->parentWidget();

        optTabBase->init(tabbar);

        optTabBase->shape = tabbar->shape();

        optTabBase->documentMode = tabbar->documentMode();

        if (theParent && overlap > 0) {

            QRect rect;

            switch (tabOverlap.shape) {

            case QTabBar::RoundedNorth:

            case QTabBar::TriangularNorth:

                rect.setRect(0, size.height()-overlap, size.width(), overlap);

                break;

            case QTabBar::RoundedSouth:

            case QTabBar::TriangularSouth:

                rect.setRect(0, 0, size.width(), overlap);

                break;

            case QTabBar::RoundedEast:

            case QTabBar::TriangularEast:

                rect.setRect(0, 0, overlap, size.height());

                break;

            case QTabBar::RoundedWest:

            case QTabBar::TriangularWest:

                rect.setRect(size.width() - overlap, 0, overlap, size.height());

                break;

            }

            optTabBase->rect = rect;

        }

    }

};

class CloseButton : public QAbstractButton

{

    Q_OBJECT

public:

    CloseButton(QWidget *parent = 0);

    QSize sizeHint() const;

    inline QSize minimumSizeHint() const

        { return sizeHint(); }

    void enterEvent(QEvent *event);

    void leaveEvent(QEvent *event);

    void paintEvent(QPaintEvent *event);

};

QT_END_NAMESPACE

#endif

#endif