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#ifndef QHEADERVIEW_P_H

#define QHEADERVIEW_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 "private/qabstractitemview_p.h"

#ifndef QT_NO_ITEMVIEWS

#include "QtCore/qbitarray.h"

#include "QtGui/qapplication.h"

#include "QtGui/qlabel.h"

QT_BEGIN_NAMESPACE

class QHeaderViewPrivate: public QAbstractItemViewPrivate

{

    Q_DECLARE_PUBLIC(QHeaderView)

public:

    enum StateVersion { VersionMarker = 0xff };

    QHeaderViewPrivate()

        : state(NoState),

          offset(0),

          sortIndicatorOrder(Qt::DescendingOrder),

          sortIndicatorSection(0),

          sortIndicatorShown(false),

          lastPos(-1),

          firstPos(-1),

          originalSize(-1),

          section(-1),

          target(-1),

          pressed(-1),

          hover(-1),

          length(0),

          sectionCount(0),

          movableSections(false),

          clickableSections(false),

          highlightSelected(false),

          stretchLastSection(false),

          cascadingResizing(false),

          resizeRecursionBlock(false),

          stretchSections(0),

          contentsSections(0),

          minimumSectionSize(-1),

          lastSectionSize(0),

          sectionIndicatorOffset(0),

          sectionIndicator(0),

          globalResizeMode(QHeaderView::Interactive)

    {}

    int lastVisibleVisualIndex() const;

    int sectionHandleAt(int position);

    void setupSectionIndicator(int section, int position);

    void updateSectionIndicator(int section, int position);

    void updateHiddenSections(int logicalFirst, int logicalLast);

    void resizeSections(QHeaderView::ResizeMode globalMode, bool useGlobalMode = false);

    void _q_sectionsRemoved(const QModelIndex &,int,int);

    void _q_layoutAboutToBeChanged();

    void _q_layoutChanged();

    bool isSectionSelected(int section) const;

    inline bool rowIntersectsSelection(int row) const {

        return (selectionModel ? selectionModel->rowIntersectsSelection(row, root) : false);

    }

    inline bool columnIntersectsSelection(int column) const {

        return (selectionModel ? selectionModel->columnIntersectsSelection(column, root) : false);

    }

    inline bool sectionIntersectsSelection(int logical) const {

        return (orientation == Qt::Horizontal ? columnIntersectsSelection(logical) : rowIntersectsSelection(logical));

    }

    inline bool isRowSelected(int row) const {

        return (selectionModel ? selectionModel->isRowSelected(row, root) : false);

    }

    inline bool isColumnSelected(int column) const {

        return (selectionModel ? selectionModel->isColumnSelected(column, root) : false);

    }

    inline void prepareSectionSelected() {

        if (!selectionModel || !selectionModel->hasSelection())

            sectionSelected.clear();

        else if (sectionSelected.count() != sectionCount * 2)

            sectionSelected.fill(false, sectionCount * 2);

        else sectionSelected.fill(false);

    }

    inline bool reverse() const {

        return orientation == Qt::Horizontal && q_func()->isRightToLeft();

    }

    inline int logicalIndex(int visualIndex) const {

        return logicalIndices.isEmpty() ? visualIndex : logicalIndices.at(visualIndex);

    }

    inline int visualIndex(int logicalIndex) const {

        return visualIndices.isEmpty() ? logicalIndex : visualIndices.at(logicalIndex);

    }

    inline void setDefaultValues(Qt::Orientation o) {

        orientation = o;

        defaultSectionSize = (o == Qt::Horizontal ? 100

                              : qMax(q_func()->minimumSectionSize(), 30));

        defaultAlignment = (o == Qt::Horizontal

                            ? Qt::Alignment(Qt::AlignCenter)

                            : Qt::AlignLeft|Qt::AlignVCenter);

    }

    inline bool isVisualIndexHidden(int visual) const {

        return !sectionHidden.isEmpty() && sectionHidden.at(visual);

    }

    inline void setVisualIndexHidden(int visual, bool hidden) {

        if (!sectionHidden.isEmpty()) sectionHidden.setBit(visual, hidden);

    }

    inline bool hasAutoResizeSections() const {

        return stretchSections || stretchLastSection || contentsSections;

    }

    QStyleOptionHeader getStyleOption() const;

    inline void invalidateCachedSizeHint() const {

        cachedSizeHint = QSize();

    }

    inline void initializeIndexMapping() const {

        if (visualIndices.count() != sectionCount

            || logicalIndices.count() != sectionCount) {

            visualIndices.resize(sectionCount);

            logicalIndices.resize(sectionCount);

            for (int s = 0; s < sectionCount; ++s) {

                visualIndices[s] = s;

                logicalIndices[s] = s;

            }

        }

    }

    inline void clearCascadingSections() {

        firstCascadingSection = sectionCount;

        lastCascadingSection = 0;

        cascadingSectionSize.clear();

    }

    inline void saveCascadingSectionSize(int visual, int size) {

        if (!cascadingSectionSize.contains(visual)) {

            cascadingSectionSize.insert(visual, size);

            firstCascadingSection = qMin(firstCascadingSection, visual);

            lastCascadingSection = qMax(lastCascadingSection, visual);

        }

    }

    inline bool sectionIsCascadable(int visual) const {

        return headerSectionResizeMode(visual) == QHeaderView::Interactive;

    }

    inline int modelSectionCount() const {

        return (orientation == Qt::Horizontal

                ? model->columnCount(root)

                : model->rowCount(root));

    }

    inline bool modelIsEmpty() const {

        return (model->rowCount(root) == 0 || model->columnCount(root) == 0);

    }

    inline void doDelayedResizeSections() {

        if (!delayedResize.isActive())

            delayedResize.start(0, q_func());

    }

    inline void executePostedResize() const {

        if (delayedResize.isActive() && state == NoState) {

            const_cast<QHeaderView*>(q_func())->resizeSections();

        }

    }

    void clear();

    void flipSortIndicator(int section);

    void cascadingResize(int visual, int newSize);

    enum State { NoState, ResizeSection, MoveSection, SelectSections, NoClear } state;

    int offset;

    Qt::Orientation orientation;

    Qt::SortOrder sortIndicatorOrder;

    int sortIndicatorSection;

    bool sortIndicatorShown;

    mutable QVector<int> visualIndices; // visualIndex = visualIndices.at(logicalIndex)

    mutable QVector<int> logicalIndices; // logicalIndex = row or column in the model

    mutable QBitArray sectionSelected; // from logical index to bit

    mutable QBitArray sectionHidden; // from visual index to bit

    mutable QHash<int, int> hiddenSectionSize; // from logical index to section size

    mutable QHash<int, int> cascadingSectionSize; // from visual index to section size

    mutable QSize cachedSizeHint;

    mutable QBasicTimer delayedResize;

    int firstCascadingSection;

    int lastCascadingSection;

    int lastPos;

    int firstPos;

    int originalSize;

    int section; // used for resizing and moving sections

    int target;

    int pressed;

    int hover;

    int length;

    int sectionCount;

    bool movableSections;

    bool clickableSections;

    bool highlightSelected;

    bool stretchLastSection;

    bool cascadingResizing;

    bool resizeRecursionBlock;

    int stretchSections;

    int contentsSections;

    int defaultSectionSize;

    int minimumSectionSize;

    int lastSectionSize; // $$$

    int sectionIndicatorOffset;

    Qt::Alignment defaultAlignment;

    QLabel *sectionIndicator;

    QHeaderView::ResizeMode globalResizeMode;

    QList<QPersistentModelIndex> persistentHiddenSections;

    // header section spans

    struct SectionSpan {

        int size;

        int count;

        QHeaderView::ResizeMode resizeMode;

        inline SectionSpan() : size(0), count(0), resizeMode(QHeaderView::Interactive) {}

        inline SectionSpan(int length, int sections, QHeaderView::ResizeMode mode)

            : size(length), count(sections), resizeMode(mode) {}

        inline int sectionSize() const { return (count > 0 ? size / count : 0); }

#ifndef QT_NO_DATASTREAM

        inline void write(QDataStream &out) const

        { out << size; out << count; out << (int)resizeMode; }

        inline void read(QDataStream &in)

        { in >> size; in >> count; int m; in >> m; resizeMode = (QHeaderView::ResizeMode)m; }

#endif

    };

    QVector<SectionSpan> sectionSpans;

    void createSectionSpan(int start, int end, int size, QHeaderView::ResizeMode mode);

    void removeSectionsFromSpans(int start, int end);

    void resizeSectionSpan(int visualIndex, int oldSize, int newSize);

    void setDefaultSectionSize(int size);

    inline int headerSectionCount() const { // for debugging

        int count = 0;

        for (int i = 0; i < sectionSpans.count(); ++i)

            count += sectionSpans.at(i).count;

        return count;

    }

    inline int headerLength() const { // for debugging

        int len = 0;

        for (int i = 0; i < sectionSpans.count(); ++i)

            len += sectionSpans.at(i).size;

        return len;

    }

    inline void removeSpans(const QList<int> &spans) {

        for (int i = spans.count() - 1; i >= 0; --i) {

            length -= sectionSpans.at(spans.at(i)).size;

            sectionSpans.remove(spans.at(i));

        }

    }

    inline int sectionSpanIndex(int visual) const {

        int section_start = 0;

        for (int i = 0; i < sectionSpans.count(); ++i) {

            int section_end = section_start + sectionSpans.at(i).count - 1;

            if (visual >= section_start && visual <= section_end)

                return i;

            section_start = section_end + 1;

        }

        return -1;

    }

    int headerSectionSize(int visual) const;

    int headerSectionPosition(int visual) const;

    int headerVisualIndexAt(int position) const;

    // resize mode

    void setHeaderSectionResizeMode(int visual, QHeaderView::ResizeMode mode);

    QHeaderView::ResizeMode headerSectionResizeMode(int visual) const;

    void setGlobalHeaderResizeMode(QHeaderView::ResizeMode mode);

    // other

    int viewSectionSizeHint(int logical) const;

    int adjustedVisualIndex(int visualIndex) const;

#ifndef QT_NO_DATASTREAM

    void write(QDataStream &out) const;

    bool read(QDataStream &in);

#endif

};

QT_END_NAMESPACE

#endif // QT_NO_ITEMVIEWS

#endif // QHEADERVIEW_P_H