src/kitemviews/private/kitemlistsizehintresolver.h

   1 /*
   2  * SPDX-FileCopyrightText: 2011 Peter Penz <peter.penz19@gmail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #ifndef KITEMLISTSIZEHINTRESOLVER_H
   8 #define KITEMLISTSIZEHINTRESOLVER_H
   9
  10 #include "dolphin_export.h"
  11 #include "kitemviews/kitemmodelbase.h"
  12
  13 #include <QSizeF>
  14 #include <QVector>
  15
  16 class KItemListView;
  17
  18 /**
  19  * @brief Calculates and caches the sizehints of items in KItemListView.
  20  */
  21 class DOLPHIN_EXPORT KItemListSizeHintResolver
  22 {
  23 public:
  24     explicit KItemListSizeHintResolver(const KItemListView* itemListView);
  25     virtual ~KItemListSizeHintResolver();
  26     QSizeF minSizeHint();
  27     QSizeF sizeHint(int index);
  28
  29     void itemsInserted(const KItemRangeList& itemRanges);
  30     void itemsRemoved(const KItemRangeList& itemRanges);
  31     void itemsMoved(const KItemRange& range, const QList<int>& movedToIndexes);
  32     void itemsChanged(int index, int count, const QSet<QByteArray>& roles);
  33
  34     void clearCache();
  35     void updateCache();
  36
  37 private:
  38     const KItemListView* m_itemListView;
  39     mutable QVector<qreal> m_logicalHeightHintCache;
  40     mutable qreal m_logicalWidthHint;
  41     mutable qreal m_minHeightHint;
  42     bool m_needsResolving;
  43 };
  44
  45 #endif