File indexing completed on 2024-05-19 05:48:09 

0001 /*
0002  * SPDX-FileCopyrightText: 2011 Peter Penz <peter.penz19@gmail.com>
0003  *
0004  * SPDX-License-Identifier: GPL-2.0-or-later
0005  */
0006 
0007 #ifndef KITEMLISTSIZEHINTRESOLVER_H
0008 #define KITEMLISTSIZEHINTRESOLVER_H
0009 
0010 #include "dolphin_export.h"
0011 #include "kitemviews/kitemmodelbase.h"
0012 
0013 #include <QSizeF>
0014 #include <QVector>
0015 
0016 class KItemListView;
0017 
0018 /**
0019  * @brief Calculates and caches the sizehints of items in KItemListView.
0020  */
0021 class DOLPHIN_EXPORT KItemListSizeHintResolver
0022 {
0023 public:
0024     explicit KItemListSizeHintResolver(const KItemListView *itemListView);
0025     virtual ~KItemListSizeHintResolver();
0026     QSizeF minSizeHint();
0027     QSizeF sizeHint(int index);
0028     bool isElided(int index);
0029 
0030     void itemsInserted(const KItemRangeList &itemRanges);
0031     void itemsRemoved(const KItemRangeList &itemRanges);
0032     void itemsMoved(const KItemRange &range, const QList<int> &movedToIndexes);
0033     void itemsChanged(int index, int count, const QSet<QByteArray> &roles);
0034 
0035     void clearCache();
0036     void updateCache();
0037 
0038 private:
0039     const KItemListView *m_itemListView;
0040     mutable QVector<std::pair<qreal /* height */, bool /* isElided */>> m_logicalHeightHintCache;
0041     mutable qreal m_logicalWidthHint;
0042     mutable qreal m_minHeightHint;
0043     bool m_needsResolving;
0044 };
0045 
0046 #endif