source: trunk/src/gui/widgets/qtabbar_p.h@ 117

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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 <qtimeline.h>
#include <qhash.h>
#include <qdebug.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), expanding(true), closeButtonOnTabs(false), selectionBehaviorOnRemove(QTabBar::SelectRightTab), paintWithOffsets(true), movable(false), dragInProgress(false), documentMode(false) {}

    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)
            , timeLine(0)
            , dragOffset(0)
            , hidLeft(false)
            , hidRight(false)
        {}
        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;

        QTimeLine *timeLine;
        int dragOffset;
        QPixmap animatingCache;
        bool hidLeft;
        bool hidRight;

        void makeTimeLine(QWidget *q) {
            if (timeLine)
                return;
            timeLine = new QTimeLine(ANIMATION_DURATION, q);
            q->connect(timeLine, SIGNAL(frameChanged(int)), q, SLOT(_q_moveTab(int)));
            q->connect(timeLine, SIGNAL(finished()), q, SLOT(_q_moveTabFinished()));
        }

        void hideWidgets() {
            if (!hidRight && rightWidget) {
                hidRight = rightWidget->isVisible();
                rightWidget->hide();
            }

            if (!hidLeft && leftWidget) {
                hidLeft = leftWidget->isVisible();
                leftWidget->hide();
            }
        }

        void unHideWidgets() {
            if (leftWidget && hidLeft)
                leftWidget->show();
            hidLeft = false;
            if (rightWidget && hidRight)
                rightWidget->show();
            hidRight = false;
        }

    };
    QList<Tab> tabList;
    QHash<QTimeLine*, int> animations;

    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(); }

    QSize minimumTabSizeHint(int index);

    QToolButton* rightB; // right or bottom
    QToolButton* leftB; // left or top

    void _q_scrollTabs();
    void _q_closeTab();
    void _q_moveTab(int);
    void _q_moveTabFinished();
    void _q_moveTabFinished(int offset);
    QRect hoverRect;

    void grabCache(int start, int end, bool unhide);
    void refresh();
    void layoutTabs();
    void layoutWidgets(int index = -1);
    void layoutTab(int index);
    void updateMacBorderMetrics();

    void makeVisible(int index);
    QSize iconSize;
    Qt::TextElideMode elideMode;
    bool useScrollButtons;

    bool expanding;
    bool closeButtonOnTabs;
    QTabBar::SelectionBehavior selectionBehaviorOnRemove;

    QPoint dragStartPosition;
    bool paintWithOffsets;
    bool movable;
    bool dragInProgress;
    bool documentMode;

    // 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