Long live Qt 4.5!

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diff --git a/src/gui/itemviews/qlistview_p.h b/src/gui/itemviews/qlistview_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QLISTVIEW_P_H
+#define QLISTVIEW_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "private/qabstractitemview_p.h"
+#include "qrubberband.h"
+#include "qbitarray.h"
+#include "qbsptree_p.h"
+#include <limits.h>
+#include <qscrollbar.h>
+
+#ifndef QT_NO_LISTVIEW
+
+QT_BEGIN_NAMESPACE
+
+class QListViewItem
+{
+    friend class QListViewPrivate;
+    friend class QStaticListViewBase;
+    friend class QDynamicListViewBase;
+public:
+    inline QListViewItem()
+        : x(-1), y(-1), w(0), h(0), indexHint(-1), visited(0xffff) {}
+    inline QListViewItem(const QListViewItem &other)
+        : x(other.x), y(other.y), w(other.w), h(other.h),
+          indexHint(other.indexHint), visited(other.visited) {}
+    inline QListViewItem(QRect r, int i)
+        : x(r.x()), y(r.y()), w(qMin(r.width(), SHRT_MAX)), h(qMin(r.height(), SHRT_MAX)),
+          indexHint(i), visited(0xffff) {}
+    inline bool operator==(const QListViewItem &other) const {
+        return (x == other.x && y == other.y && w == other.w && h == other.h &&
+                indexHint == other.indexHint); }
+    inline bool operator!=(const QListViewItem &other) const
+        { return !(*this == other); }
+    inline bool isValid() const
+        { return (x > -1) && (y > -1) && (w > 0) && (h > 0) && (indexHint > -1); }
+    inline void invalidate()
+        { x = -1; y = -1; w = 0; h = 0; }
+    inline void resize(const QSize &size)
+        { w = qMin(size.width(), SHRT_MAX); h = qMin(size.height(), SHRT_MAX); }
+    inline void move(const QPoint &position)
+        { x = position.x(); y = position.y(); }
+    inline int width() const { return w; }
+    inline int height() const { return h; }
+private:
+    inline QRect rect() const
+        { return QRect(x, y, w, h); }
+    int x, y;
+    short w, h;
+    mutable int indexHint;
+    uint visited;
+};
+
+struct QListViewLayoutInfo
+{
+    QRect bounds;
+    QSize grid;
+    int spacing;
+    int first;
+    int last;
+    bool wrap;
+    QListView::Flow flow;
+    int max;
+};
+
+class QListView;
+class QListViewPrivate;
+
+class QCommonListViewBase
+{
+public:
+    inline QCommonListViewBase(QListView *q, QListViewPrivate *d) : dd(d), qq(q) {}
+
+    inline int spacing() const;
+    inline bool isWrapping() const;
+    inline QSize gridSize() const;
+    inline QListView::Flow flow() const;
+    inline QListView::Movement movement() const;
+
+    inline QPoint offset() const;
+    inline QPoint pressedPosition() const;
+    inline bool uniformItemSizes() const;
+    inline int column() const;
+
+    inline int verticalScrollBarValue() const;
+    inline int horizontalScrollBarValue() const;
+    inline QListView::ScrollMode verticalScrollMode() const;
+    inline QListView::ScrollMode horizontalScrollMode() const;
+
+    inline QModelIndex modelIndex(int row) const;
+    inline int rowCount() const;
+
+    inline QStyleOptionViewItemV4 viewOptions() const;
+    inline QWidget *viewport() const;
+    inline QRect clipRect() const;
+
+    inline QSize cachedItemSize() const;
+    inline QRect viewItemRect(const QListViewItem &item) const;
+    inline QSize itemSize(const QStyleOptionViewItemV2 &opt, const QModelIndex &idx) const;
+    inline QAbstractItemDelegate *delegate(const QModelIndex &idx) const;
+
+    inline bool isHidden(int row) const;
+    inline int hiddenCount() const;
+
+    inline void clearIntersections() const;
+    inline void appendToIntersections(const QModelIndex &idx) const;
+
+    inline bool isRightToLeft() const;
+
+    QListViewPrivate *dd;
+    QListView *qq;
+};
+
+// ### rename to QListModeViewBase
+class QStaticListViewBase : public QCommonListViewBase
+{
+    friend class QListViewPrivate;
+public:
+    QStaticListViewBase(QListView *q, QListViewPrivate *d) : QCommonListViewBase(q, d),
+        batchStartRow(0), batchSavedDeltaSeg(0), batchSavedPosition(0) {}
+
+    QVector<int> flowPositions;
+    QVector<int> segmentPositions;
+    QVector<int> segmentStartRows;
+    QVector<int> segmentExtents;
+
+    QSize contentsSize;
+
+    // used when laying out in batches
+    int batchStartRow;
+    int batchSavedDeltaSeg;
+    int batchSavedPosition;
+
+    bool doBatchedItemLayout(const QListViewLayoutInfo &info, int max);
+
+    QPoint initStaticLayout(const QListViewLayoutInfo &info);
+    void doStaticLayout(const QListViewLayoutInfo &info);
+    void intersectingStaticSet(const QRect &area) const;
+
+    int itemIndex(const QListViewItem &item) const;
+
+    int perItemScrollingPageSteps(int length, int bounds, bool wrap) const;
+
+    int perItemScrollToValue(int index, int value, int height,
+                             QAbstractItemView::ScrollHint hint,
+                             Qt::Orientation orientation, bool wrap, int extent) const;
+
+    QRect mapToViewport(const QRect &rect) const;
+
+    QListViewItem indexToListViewItem(const QModelIndex &index) const;
+
+    void scrollContentsBy(int &dx, int &dy);
+
+    int verticalPerItemValue(int itemIndex, int verticalValue, int areaHeight,
+                       bool above, bool below, bool wrap, QListView::ScrollHint hint, int itemHeight) const;
+    int horizontalPerItemValue(int itemIndex, int horizontalValue, int areaWidth,
+                       bool leftOf, bool rightOf, bool wrap, QListView::ScrollHint hint, int itemWidth) const;
+
+    void clear();
+};
+
+// ### rename to QIconModeViewBase
+class QDynamicListViewBase : public QCommonListViewBase
+{
+    friend class QListViewPrivate;
+public:
+    QDynamicListViewBase(QListView *q, QListViewPrivate *d) : QCommonListViewBase(q, d),
+        batchStartRow(0), batchSavedDeltaSeg(0) {}
+
+    QBspTree tree;
+    QVector<QListViewItem> items;
+    QBitArray moved;
+
+    QSize contentsSize;
+
+    QVector<QModelIndex> draggedItems; // indices to the tree.itemVector
+    mutable QPoint draggedItemsPos;
+
+    // used when laying out in batches
+    int batchStartRow;
+    int batchSavedDeltaSeg;
+
+    void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
+    bool doBatchedItemLayout(const QListViewLayoutInfo &info, int max);
+
+    void initBspTree(const QSize &contents);
+    QPoint initDynamicLayout(const QListViewLayoutInfo &info);
+    void doDynamicLayout(const QListViewLayoutInfo &info);
+    void intersectingDynamicSet(const QRect &area) const;
+
+    static void addLeaf(QVector<int> &leaf, const QRect &area,
+                        uint visited, QBspTree::Data data);
+
+    void insertItem(int index);
+    void removeItem(int index);
+    void moveItem(int index, const QPoint &dest);
+
+    int itemIndex(const QListViewItem &item) const;
+
+    void createItems(int to);
+    void drawItems(QPainter *painter, const QVector<QModelIndex> &indexes) const;
+    QRect itemsRect(const QVector<QModelIndex> &indexes) const;
+
+    QPoint draggedItemsDelta() const;
+    QRect draggedItemsRect() const;
+
+    QPoint snapToGrid(const QPoint &pos) const;
+
+    void scrollElasticBandBy(int dx, int dy);
+
+    QListViewItem indexToListViewItem(const QModelIndex &index) const;
+
+    void clear();
+    void updateContentsSize();
+};
+
+class QListViewPrivate: public QAbstractItemViewPrivate
+{
+    Q_DECLARE_PUBLIC(QListView)
+public:
+    QListViewPrivate();
+    ~QListViewPrivate();
+
+    void clear();
+    void prepareItemsLayout();
+
+    bool doItemsLayout(int num);
+
+    inline void intersectingSet(const QRect &area, bool doLayout = true) const {
+        if (doLayout) executePostedLayout();
+        QRect a = (q_func()->isRightToLeft() ? flipX(area.normalized()) : area.normalized());
+        if (viewMode == QListView::ListMode) staticListView->intersectingStaticSet(a);
+        else dynamicListView->intersectingDynamicSet(a);
+    }
+
+    // ### FIXME:
+    inline void resetBatchStartRow()
+        { if (viewMode == QListView::ListMode) staticListView->batchStartRow = 0;
+              else dynamicListView->batchStartRow = 0; }
+    inline int batchStartRow() const
+        { return (viewMode == QListView::ListMode
+          ? staticListView->batchStartRow : dynamicListView->batchStartRow); }
+    inline QSize contentsSize() const
+        { return (viewMode == QListView::ListMode
+          ? staticListView->contentsSize : dynamicListView->contentsSize); }
+    inline void setContentsSize(int w, int h)
+        { if (viewMode == QListView::ListMode) staticListView->contentsSize = QSize(w, h);
+          else dynamicListView->contentsSize = QSize(w, h); }
+
+    inline int flipX(int x) const
+        { return qMax(viewport->width(), contentsSize().width()) - x; }
+    inline QPoint flipX(const QPoint &p) const
+        { return QPoint(flipX(p.x()), p.y()); }
+    inline QRect flipX(const QRect &r) const
+        { return QRect(flipX(r.x()) - r.width(), r.y(), r.width(), r.height()); }
+    inline QRect viewItemRect(const QListViewItem &item) const
+        { if (q_func()->isRightToLeft()) return flipX(item.rect()); return item.rect(); }
+
+    int itemIndex(const QListViewItem &item) const;
+    QListViewItem indexToListViewItem(const QModelIndex &index) const;
+    inline QModelIndex listViewItemToIndex(const QListViewItem &item) const
+        { return model->index(itemIndex(item), column, root); }
+
+    QRect mapToViewport(const QRect &rect, bool greedy = false) const;
+
+    QModelIndex closestIndex(const QRect &target, const QVector<QModelIndex> &candidates) const;
+    QSize itemSize(const QStyleOptionViewItem &option, const QModelIndex &index) const;
+
+    bool selectionAllowed(const QModelIndex &index) const
+        { if (viewMode == QListView::ListMode && !showElasticBand) return index.isValid(); return true; }
+
+    int horizontalScrollToValue(const QModelIndex &index, const QRect &rect, QListView::ScrollHint hint) const;
+    int verticalScrollToValue(const QModelIndex &index, const QRect &rect, QListView::ScrollHint hint) const;
+
+    QItemSelection selection(const QRect &rect) const;
+    void selectAll(QItemSelectionModel::SelectionFlags command);
+
+    inline void setGridSize(const QSize &size) { grid = size; }
+    inline QSize gridSize() const { return grid; }
+    inline void setWrapping(bool b) { wrap = b; }
+    inline bool isWrapping() const { return wrap; }
+    inline void setSpacing(int s) { space = s; }
+    inline int spacing() const { return space; }
+    inline void setSelectionRectVisible(bool visible) { showElasticBand = visible; }
+    inline bool isSelectionRectVisible() const { return showElasticBand; }
+
+    inline QModelIndex modelIndex(int row) const { return model->index(row, column, root); }
+    inline bool isHidden(int row) const { return hiddenRows.contains(model->index(row, 0, root)); }
+    inline bool isHiddenOrDisabled(int row) const { return isHidden(row) || !isIndexEnabled(modelIndex(row)); }
+
+    inline void removeCurrentAndDisabled(QVector<QModelIndex> *indexes, const QModelIndex &current) const {
+        QVector<QModelIndex>::iterator it = indexes->begin();
+        while (it != indexes->end()) {
+            if (!isIndexEnabled(*it) || (*it) == current)
+                indexes->erase(it);
+            else
+                ++it;
+        }
+    }
+
+    void scrollElasticBandBy(int dx, int dy);
+
+    // ### FIXME: we only need one at a time
+    QDynamicListViewBase *dynamicListView;
+    QStaticListViewBase *staticListView;
+
+    // ### FIXME: see if we can move the members into the dynamic/static classes
+
+    bool wrap;
+    int space;
+    QSize grid;
+
+    QListView::Flow flow;
+    QListView::Movement movement;
+    QListView::ResizeMode resizeMode;
+    QListView::LayoutMode layoutMode;
+    QListView::ViewMode viewMode;
+
+    // the properties controlling the
+    // icon- or list-view modes
+    enum ModeProperties {
+        Wrap = 1,
+        Spacing = 2,
+        GridSize = 4,
+        Flow = 8,
+        Movement = 16,
+        ResizeMode = 32,
+        SelectionRectVisible = 64
+    };
+
+    uint modeProperties : 8;
+
+    QRect layoutBounds;
+
+    // used for intersecting set
+    mutable QVector<QModelIndex> intersectVector;
+
+    // timers
+    QBasicTimer batchLayoutTimer;
+
+    // used for hidden items
+    QVector<QPersistentModelIndex> hiddenRows;
+
+    int column;
+    bool uniformItemSizes;
+    mutable QSize cachedItemSize;
+    int batchSize;
+
+    QRect elasticBand;
+    bool showElasticBand;
+};
+
+// inline implementations
+
+inline int QCommonListViewBase::spacing() const { return dd->spacing(); }
+inline bool QCommonListViewBase::isWrapping() const { return dd->isWrapping(); }
+inline QSize QCommonListViewBase::gridSize() const { return dd->gridSize(); }
+inline QListView::Flow QCommonListViewBase::flow() const { return dd->flow; }
+inline QListView::Movement QCommonListViewBase::movement() const { return dd->movement; }
+
+inline QPoint QCommonListViewBase::offset() const { return dd->offset(); }
+inline QPoint QCommonListViewBase::pressedPosition() const { return dd->pressedPosition; }
+inline bool QCommonListViewBase::uniformItemSizes() const { return dd->uniformItemSizes; }
+inline int QCommonListViewBase::column() const { return dd->column; }
+
+inline int QCommonListViewBase::verticalScrollBarValue() const { return qq->verticalScrollBar()->value(); }
+inline int QCommonListViewBase::horizontalScrollBarValue() const { return qq->horizontalScrollBar()->value(); }
+inline QListView::ScrollMode QCommonListViewBase::verticalScrollMode() const { return qq->verticalScrollMode(); }
+inline QListView::ScrollMode QCommonListViewBase::horizontalScrollMode() const { return qq->horizontalScrollMode(); }
+
+inline QModelIndex QCommonListViewBase::modelIndex(int row) const
+    { return dd->model->index(row, dd->column, dd->root); }
+inline int QCommonListViewBase::rowCount() const { return dd->model->rowCount(dd->root); }
+
+inline QStyleOptionViewItemV4 QCommonListViewBase::viewOptions() const { return dd->viewOptionsV4(); }
+inline QWidget *QCommonListViewBase::viewport() const { return dd->viewport; }
+inline QRect QCommonListViewBase::clipRect() const { return dd->clipRect(); }
+
+inline QSize QCommonListViewBase::cachedItemSize() const { return dd->cachedItemSize; }
+inline QRect QCommonListViewBase::viewItemRect(const QListViewItem &item) const { return dd->viewItemRect(item); }
+inline QSize QCommonListViewBase::itemSize(const QStyleOptionViewItemV2 &opt, const QModelIndex &idx) const
+    { return dd->itemSize(opt, idx); }
+
+inline QAbstractItemDelegate *QCommonListViewBase::delegate(const QModelIndex &idx) const
+    { return dd->delegateForIndex(idx); }
+
+inline bool QCommonListViewBase::isHidden(int row) const { return dd->isHidden(row); }
+inline int QCommonListViewBase::hiddenCount() const { return dd->hiddenRows.count(); }
+
+inline void QCommonListViewBase::clearIntersections() const { dd->intersectVector.clear(); }
+inline void QCommonListViewBase::appendToIntersections(const QModelIndex &idx) const { dd->intersectVector.append(idx); }
+
+inline bool QCommonListViewBase::isRightToLeft() const { return qq->isRightToLeft(); }
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_LISTVIEW
+
+#endif // QLISTVIEW_P_H