source: trunk/src/gui/widgets/qtabbar_p.h@ 792

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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);