/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef QHEADERVIEW_P_H+
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#define QHEADERVIEW_P_H+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API.  It exists purely as an+
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// implementation detail.  This header file may change from version to+
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// version without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#include "private/qabstractitemview_p.h"+
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+
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#ifndef QT_NO_ITEMVIEWS+
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+
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#include "QtCore/qbitarray.h"+
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#include "QtGui/qapplication.h"+
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#include "QtGui/qlabel.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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class QHeaderViewPrivate: public QAbstractItemViewPrivate+
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{+
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    Q_DECLARE_PUBLIC(QHeaderView)+
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+
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public:+
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    enum StateVersion { VersionMarker = 0xff };+
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+
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    QHeaderViewPrivate()+
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        : state(NoState),+
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          offset(0),+
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          sortIndicatorOrder(Qt::DescendingOrder),+
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          sortIndicatorSection(0),+
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          sortIndicatorShown(false),+
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          lastPos(-1),+
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          firstPos(-1),+
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          originalSize(-1),+
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          section(-1),+
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          target(-1),+
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          pressed(-1),+
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          hover(-1),+
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          length(0),+
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          sectionCount(0),+
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          movableSections(false),+
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          clickableSections(false),+
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          highlightSelected(false),+
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          stretchLastSection(false),+
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          cascadingResizing(false),+
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          resizeRecursionBlock(false),+
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          stretchSections(0),+
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          contentsSections(0),+
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          minimumSectionSize(-1),+
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          lastSectionSize(0),+
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          sectionIndicatorOffset(0),+
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          sectionIndicator(0),+
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          globalResizeMode(QHeaderView::Interactive)+
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    {}+
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+
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+
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    int lastVisibleVisualIndex() const;+
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    int sectionHandleAt(int position);+
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    void setupSectionIndicator(int section, int position);+
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    void updateSectionIndicator(int section, int position);+
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    void updateHiddenSections(int logicalFirst, int logicalLast);+
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    void resizeSections(QHeaderView::ResizeMode globalMode, bool useGlobalMode = false);+
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    void _q_sectionsRemoved(const QModelIndex &,int,int);+
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    void _q_layoutAboutToBeChanged();+
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    void _q_layoutChanged();+
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+
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    bool isSectionSelected(int section) const;+
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+
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    inline bool rowIntersectsSelection(int row) const {+
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        return (selectionModel ? selectionModel->rowIntersectsSelection(row, root) : false);+
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    }+
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+
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    inline bool columnIntersectsSelection(int column) const {+
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        return (selectionModel ? selectionModel->columnIntersectsSelection(column, root) : false);+
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    }+
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+
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    inline bool sectionIntersectsSelection(int logical) const {+
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        return (orientation == Qt::Horizontal ? columnIntersectsSelection(logical) : rowIntersectsSelection(logical));+
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    }+
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+
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    inline bool isRowSelected(int row) const {+
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        return (selectionModel ? selectionModel->isRowSelected(row, root) : false);+
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    }+
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+
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    inline bool isColumnSelected(int column) const {+
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        return (selectionModel ? selectionModel->isColumnSelected(column, root) : false);+
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    }+
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+
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    inline void prepareSectionSelected() {+
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        if (!selectionModel || !selectionModel->hasSelection())+
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            sectionSelected.clear();+
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        else if (sectionSelected.count() != sectionCount * 2)+
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            sectionSelected.fill(false, sectionCount * 2);+
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        else sectionSelected.fill(false);+
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    }+
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+
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    inline bool reverse() const {+
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        return orientation == Qt::Horizontal && q_func()->isRightToLeft();+
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    }+
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+
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    inline int logicalIndex(int visualIndex) const {+
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        return logicalIndices.isEmpty() ? visualIndex : logicalIndices.at(visualIndex);+
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    }+
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+
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    inline int visualIndex(int logicalIndex) const {+
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        return visualIndices.isEmpty() ? logicalIndex : visualIndices.at(logicalIndex);+
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    }+
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+
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    inline void setDefaultValues(Qt::Orientation o) {+
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        orientation = o;+
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        defaultSectionSize = (o == Qt::Horizontal ? 100+
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                              : qMax(q_func()->minimumSectionSize(), 30));+
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        defaultAlignment = (o == Qt::Horizontal+
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                            ? Qt::Alignment(Qt::AlignCenter)+
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                            : Qt::AlignLeft|Qt::AlignVCenter);+
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    }+
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+
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    inline bool isVisualIndexHidden(int visual) const {+
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        return !sectionHidden.isEmpty() && sectionHidden.at(visual);+
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    }+
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+
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    inline void setVisualIndexHidden(int visual, bool hidden) {+
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        if (!sectionHidden.isEmpty()) sectionHidden.setBit(visual, hidden);+
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    }+
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+
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    inline bool hasAutoResizeSections() const {+
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        return stretchSections || stretchLastSection || contentsSections;+
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    }+
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+
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    QStyleOptionHeader getStyleOption() const;+
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+
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    inline void invalidateCachedSizeHint() const {+
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        cachedSizeHint = QSize();+
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    }+
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+
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    inline void initializeIndexMapping() const {+
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        if (visualIndices.count() != sectionCount+
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            || logicalIndices.count() != sectionCount) {+
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            visualIndices.resize(sectionCount);+
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            logicalIndices.resize(sectionCount);+
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            for (int s = 0; s < sectionCount; ++s) {+
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                visualIndices[s] = s;+
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                logicalIndices[s] = s;+
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            }+
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        }+
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    }+
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+
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    inline void clearCascadingSections() {+
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        firstCascadingSection = sectionCount;+
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        lastCascadingSection = 0;+
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        cascadingSectionSize.clear();+
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    }+
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+
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    inline void saveCascadingSectionSize(int visual, int size) {+
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        if (!cascadingSectionSize.contains(visual)) {+
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            cascadingSectionSize.insert(visual, size);+
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            firstCascadingSection = qMin(firstCascadingSection, visual);+
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            lastCascadingSection = qMax(lastCascadingSection, visual);+
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        }+
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    }+
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+
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    inline bool sectionIsCascadable(int visual) const {+
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        return headerSectionResizeMode(visual) == QHeaderView::Interactive;+
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    }+
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+
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    inline int modelSectionCount() const {+
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        return (orientation == Qt::Horizontal+
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                ? model->columnCount(root)+
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                : model->rowCount(root));+
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    }+
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+
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    inline bool modelIsEmpty() const {+
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        return (model->rowCount(root) == 0 || model->columnCount(root) == 0);+
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    }+
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+
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    inline void doDelayedResizeSections() {+
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        if (!delayedResize.isActive())+
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            delayedResize.start(0, q_func());+
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    }+
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+
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    inline void executePostedResize() const {+
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        if (delayedResize.isActive() && state == NoState) {+
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            const_cast<QHeaderView*>(q_func())->resizeSections();+
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        }+
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    }+
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+
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    void clear();+
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    void flipSortIndicator(int section);+
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    void cascadingResize(int visual, int newSize);+
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+
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    enum State { NoState, ResizeSection, MoveSection, SelectSections, NoClear } state;+
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+
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    int offset;+
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    Qt::Orientation orientation;+
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    Qt::SortOrder sortIndicatorOrder;+
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    int sortIndicatorSection;+
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    bool sortIndicatorShown;+
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+
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    mutable QVector<int> visualIndices; // visualIndex = visualIndices.at(logicalIndex)+
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    mutable QVector<int> logicalIndices; // logicalIndex = row or column in the model+
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    mutable QBitArray sectionSelected; // from logical index to bit+
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    mutable QBitArray sectionHidden; // from visual index to bit+
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    mutable QHash<int, int> hiddenSectionSize; // from logical index to section size+
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    mutable QHash<int, int> cascadingSectionSize; // from visual index to section size+
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    mutable QSize cachedSizeHint;+
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    mutable QBasicTimer delayedResize;+
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+
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    int firstCascadingSection;+
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    int lastCascadingSection;+
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+
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    int lastPos;+
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    int firstPos;+
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    int originalSize;+
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    int section; // used for resizing and moving sections+
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    int target;+
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    int pressed;+
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    int hover;+
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+
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    int length;+
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    int sectionCount;+
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    bool movableSections;+
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    bool clickableSections;+
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    bool highlightSelected;+
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    bool stretchLastSection;+
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    bool cascadingResizing;+
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    bool resizeRecursionBlock;+
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    int stretchSections;+
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    int contentsSections;+
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    int defaultSectionSize;+
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    int minimumSectionSize;+
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    int lastSectionSize; // $$$+
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    int sectionIndicatorOffset;+
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    Qt::Alignment defaultAlignment;+
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    QLabel *sectionIndicator;+
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    QHeaderView::ResizeMode globalResizeMode;+
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    QList<QPersistentModelIndex> persistentHiddenSections;+
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+
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    // header section spans+
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+
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    struct SectionSpan {+
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        int size;+
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        int count;+
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        QHeaderView::ResizeMode resizeMode;+
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        inline SectionSpan() : size(0), count(0), resizeMode(QHeaderView::Interactive) {}+
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        inline SectionSpan(int length, int sections, QHeaderView::ResizeMode mode)+
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            : size(length), count(sections), resizeMode(mode) {}+
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        inline int sectionSize() const { return (count > 0 ? size / count : 0); }+
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#ifndef QT_NO_DATASTREAM+
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        inline void write(QDataStream &out) const+
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        { out << size; out << count; out << (int)resizeMode; }+
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        inline void read(QDataStream &in)+
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        { in >> size; in >> count; int m; in >> m; resizeMode = (QHeaderView::ResizeMode)m; }+
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#endif+
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    };+
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+
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    QVector<SectionSpan> sectionSpans;+
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+
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    void createSectionSpan(int start, int end, int size, QHeaderView::ResizeMode mode);+
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    void removeSectionsFromSpans(int start, int end);+
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    void resizeSectionSpan(int visualIndex, int oldSize, int newSize);+
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    void setDefaultSectionSize(int size);+
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+
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    inline int headerSectionCount() const { // for debugging+
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        int count = 0;+
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        for (int i = 0; i < sectionSpans.count(); ++i)+
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            count += sectionSpans.at(i).count;+
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        return count;+
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    }+
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+
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    inline int headerLength() const { // for debugging+
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        int len = 0;+
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        for (int i = 0; i < sectionSpans.count(); ++i)+
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            len += sectionSpans.at(i).size;+
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        return len;+
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    }+
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+
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    inline void removeSpans(const QList<int> &spans) {+
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        for (int i = spans.count() - 1; i >= 0; --i) {+
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            length -= sectionSpans.at(spans.at(i)).size;+
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            sectionSpans.remove(spans.at(i));+
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        }+
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    }+
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+
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    inline int sectionSpanIndex(int visual) const {+
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        int section_start = 0;+
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        for (int i = 0; i < sectionSpans.count(); ++i) {+
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            int section_end = section_start + sectionSpans.at(i).count - 1;+
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            if (visual >= section_start && visual <= section_end)+
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                return i;+
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            section_start = section_end + 1;+
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        }+
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        return -1;+
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    }+
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+
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    int headerSectionSize(int visual) const;+
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    int headerSectionPosition(int visual) const;+
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    int headerVisualIndexAt(int position) const;+
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+
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    // resize mode+
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    void setHeaderSectionResizeMode(int visual, QHeaderView::ResizeMode mode);+
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    QHeaderView::ResizeMode headerSectionResizeMode(int visual) const;+
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    void setGlobalHeaderResizeMode(QHeaderView::ResizeMode mode);+
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+
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    // other+
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    int viewSectionSizeHint(int logical) const;+
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    int adjustedVisualIndex(int visualIndex) const;+
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+
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#ifndef QT_NO_DATASTREAM+
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    void write(QDataStream &out) const;+
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    bool read(QDataStream &in);+
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#endif+
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+
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};+
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+
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QT_END_NAMESPACE+
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+
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#endif // QT_NO_ITEMVIEWS+
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+
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#endif // QHEADERVIEW_P_H+
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