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| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
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| ** This file is part of the QtWidgets module of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #ifndef QTREEVIEW_P_H |
| #define QTREEVIEW_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" |
| #include <QtCore/qvariantanimation.h> |
| #include <QtCore/qabstractitemmodel.h> |
| |
| #ifndef QT_NO_TREEVIEW |
| |
| QT_BEGIN_NAMESPACE |
| |
| struct QTreeViewItem |
| { |
| QTreeViewItem() : parentItem(-1), expanded(false), spanning(false), hasChildren(false), |
| hasMoreSiblings(false), total(0), level(0), height(0) {} |
| QModelIndex index; // we remove items whenever the indexes are invalidated |
| int parentItem; // parent item index in viewItems |
| uint expanded : 1; |
| uint spanning : 1; |
| uint hasChildren : 1; // if the item has visible children (even if collapsed) |
| uint hasMoreSiblings : 1; |
| uint total : 28; // total number of children visible |
| uint level : 16; // indentation |
| int height : 16; // row height |
| }; |
| |
| Q_DECLARE_TYPEINFO(QTreeViewItem, Q_MOVABLE_TYPE); |
| |
| class Q_WIDGETS_EXPORT QTreeViewPrivate : public QAbstractItemViewPrivate |
| { |
| Q_DECLARE_PUBLIC(QTreeView) |
| public: |
| |
| QTreeViewPrivate() |
| : QAbstractItemViewPrivate(), |
| header(0), indent(20), lastViewedItem(0), defaultItemHeight(-1), |
| uniformRowHeights(false), rootDecoration(true), |
| itemsExpandable(true), sortingEnabled(false), |
| expandsOnDoubleClick(true), |
| allColumnsShowFocus(false), customIndent(false), current(0), spanning(false), |
| animationsEnabled(false), columnResizeTimerID(0), |
| autoExpandDelay(-1), hoverBranch(-1), geometryRecursionBlock(false), hasRemovedItems(false), |
| treePosition(0) {} |
| |
| ~QTreeViewPrivate() {} |
| void initialize(); |
| int logicalIndexForTree() const; |
| inline bool isTreePosition(int logicalIndex) const |
| { |
| return logicalIndex == logicalIndexForTree(); |
| } |
| |
| QItemViewPaintPairs draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const; |
| void adjustViewOptionsForIndex(QStyleOptionViewItem *option, const QModelIndex ¤t) const; |
| |
| #ifndef QT_NO_ANIMATION |
| struct AnimatedOperation : public QVariantAnimation |
| { |
| int item; |
| QPixmap before; |
| QPixmap after; |
| QWidget *viewport; |
| AnimatedOperation() : item(0) { setEasingCurve(QEasingCurve::InOutQuad); } |
| int top() const { return startValue().toInt(); } |
| QRect rect() const { QRect rect = viewport->rect(); rect.moveTop(top()); return rect; } |
| void updateCurrentValue(const QVariant &) { viewport->update(rect()); } |
| void updateState(State state, State) { if (state == Stopped) before = after = QPixmap(); } |
| } animatedOperation; |
| void prepareAnimatedOperation(int item, QVariantAnimation::Direction d); |
| void beginAnimatedOperation(); |
| void drawAnimatedOperation(QPainter *painter) const; |
| QPixmap renderTreeToPixmapForAnimation(const QRect &rect) const; |
| void _q_endAnimatedOperation(); |
| #endif //QT_NO_ANIMATION |
| |
| void expand(int item, bool emitSignal); |
| void collapse(int item, bool emitSignal); |
| |
| void _q_columnsAboutToBeRemoved(const QModelIndex &, int, int); |
| void _q_columnsRemoved(const QModelIndex &, int, int); |
| void _q_modelAboutToBeReset(); |
| void _q_sortIndicatorChanged(int column, Qt::SortOrder order); |
| void _q_modelDestroyed(); |
| |
| void layout(int item, bool recusiveExpanding = false, bool afterIsUninitialized = false); |
| |
| int pageUp(int item) const; |
| int pageDown(int item) const; |
| |
| int itemHeight(int item) const; |
| int indentationForItem(int item) const; |
| int coordinateForItem(int item) const; |
| int itemAtCoordinate(int coordinate) const; |
| |
| int viewIndex(const QModelIndex &index) const; |
| QModelIndex modelIndex(int i, int column = 0) const; |
| |
| void insertViewItems(int pos, int count, const QTreeViewItem &viewItem); |
| void removeViewItems(int pos, int count); |
| #if 0 |
| bool checkViewItems() const; |
| #endif |
| |
| int firstVisibleItem(int *offset = 0) const; |
| int lastVisibleItem(int firstVisual = -1, int offset = -1) const; |
| int columnAt(int x) const; |
| bool hasVisibleChildren( const QModelIndex& parent) const; |
| |
| bool expandOrCollapseItemAtPos(const QPoint &pos); |
| |
| void updateScrollBars(); |
| |
| int itemDecorationAt(const QPoint &pos) const; |
| QRect itemDecorationRect(const QModelIndex &index) const; |
| |
| |
| QList<QPair<int, int> > columnRanges(const QModelIndex &topIndex, const QModelIndex &bottomIndex) const; |
| void select(const QModelIndex &start, const QModelIndex &stop, QItemSelectionModel::SelectionFlags command); |
| |
| QPair<int,int> startAndEndColumns(const QRect &rect) const; |
| |
| void updateChildCount(const int parentItem, const int delta); |
| |
| void paintAlternatingRowColors(QPainter *painter, QStyleOptionViewItem *option, int y, int bottom) const; |
| |
| // logicalIndices: vector of currently visibly logical indices |
| // itemPositions: vector of view item positions (beginning/middle/end/onlyone) |
| void calcLogicalIndices(QVector<int> *logicalIndices, QVector<QStyleOptionViewItem::ViewItemPosition> *itemPositions, int left, int right) const; |
| int widthHintForIndex(const QModelIndex &index, int hint, const QStyleOptionViewItem &option, int i) const; |
| QHeaderView *header; |
| int indent; |
| |
| mutable QVector<QTreeViewItem> viewItems; |
| mutable int lastViewedItem; |
| int defaultItemHeight; // this is just a number; contentsHeight() / numItems |
| bool uniformRowHeights; // used when all rows have the same height |
| bool rootDecoration; |
| bool itemsExpandable; |
| bool sortingEnabled; |
| bool expandsOnDoubleClick; |
| bool allColumnsShowFocus; |
| bool customIndent; |
| |
| // used for drawing |
| mutable QPair<int,int> leftAndRight; |
| mutable int current; |
| mutable bool spanning; |
| |
| // used when expanding and collapsing items |
| QSet<QPersistentModelIndex> expandedIndexes; |
| bool animationsEnabled; |
| |
| inline bool storeExpanded(const QPersistentModelIndex &idx) { |
| if (expandedIndexes.contains(idx)) |
| return false; |
| expandedIndexes.insert(idx); |
| return true; |
| } |
| |
| inline bool isIndexExpanded(const QModelIndex &idx) const { |
| //We first check if the idx is a QPersistentModelIndex, because creating QPersistentModelIndex is slow |
| return !(idx.flags() & Qt::ItemNeverHasChildren) && isPersistent(idx) && expandedIndexes.contains(idx); |
| } |
| |
| // used when hiding and showing items |
| QSet<QPersistentModelIndex> hiddenIndexes; |
| |
| inline bool isRowHidden(const QModelIndex &idx) const { |
| if (hiddenIndexes.isEmpty()) |
| return false; |
| //We first check if the idx is a QPersistentModelIndex, because creating QPersistentModelIndex is slow |
| return isPersistent(idx) && hiddenIndexes.contains(idx); |
| } |
| |
| inline bool isItemHiddenOrDisabled(int i) const { |
| if (i < 0 || i >= viewItems.count()) |
| return false; |
| const QModelIndex index = viewItems.at(i).index; |
| return isRowHidden(index) || !isIndexEnabled(index); |
| } |
| |
| inline int above(int item) const |
| { int i = item; while (isItemHiddenOrDisabled(--item)){} return item < 0 ? i : item; } |
| inline int below(int item) const |
| { int i = item; while (isItemHiddenOrDisabled(++item)){} return item >= viewItems.count() ? i : item; } |
| inline void invalidateHeightCache(int item) const |
| { viewItems[item].height = 0; } |
| |
| inline int accessibleTable2Index(const QModelIndex &index) const { |
| return (viewIndex(index) + (header ? 1 : 0)) * model->columnCount()+index.column(); |
| } |
| |
| int accessibleTree2Index(const QModelIndex &index) const; |
| |
| void updateIndentationFromStyle(); |
| |
| // used for spanning rows |
| QVector<QPersistentModelIndex> spanningIndexes; |
| |
| // used for updating resized columns |
| int columnResizeTimerID; |
| QList<int> columnsToUpdate; |
| |
| // used for the automatic opening of nodes during DND |
| int autoExpandDelay; |
| QBasicTimer openTimer; |
| |
| // used for drawing hilighted expand/collapse indicators |
| mutable int hoverBranch; |
| |
| // used for blocking recursion when calling setViewportMargins from updateGeometries |
| bool geometryRecursionBlock; |
| |
| // If we should clean the set |
| bool hasRemovedItems; |
| |
| // tree position |
| int treePosition; |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QT_NO_TREEVIEW |
| |
| #endif // QTREEVIEW_P_H |