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/*
* SPDX-FileCopyrightText: 2011 Peter Penz <[email protected]>
*
* Based on the Itemviews NG project from Trolltech Labs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef KITEMLISTSELECTIONMANAGER_H
#define KITEMLISTSELECTIONMANAGER_H
#include "dolphin_export.h"
#include "kitemviews/kitemmodelbase.h"
#include "kitemviews/kitemset.h"
#include <QObject>
class KItemModelBase;
/**
* @brief Allows to select and deselect items of a KItemListView.
*/
class DOLPHIN_EXPORT KItemListSelectionManager : public QObject
{
Q_OBJECT
enum RangesRemovingBehaviour {
DiscardRemovedIndex,
AdjustRemovedIndex
};
public:
enum SelectionMode {
Select,
Deselect,
Toggle
};
explicit KItemListSelectionManager(QObject* parent = nullptr);
~KItemListSelectionManager() override;
void setCurrentItem(int current);
int currentItem() const;
void setSelectedItems(const KItemSet& items);
KItemSet selectedItems() const;
bool isSelected(int index) const;
bool hasSelection() const;
void setSelected(int index, int count = 1, SelectionMode mode = Select);
/**
* Equivalent to:
* clearSelection();
* setSelected(index, count);
* but emitting once only selectionChanged signal
*/
void replaceSelection(int index, int count = 1);
void clearSelection();
void beginAnchoredSelection(int anchor);
void endAnchoredSelection();
bool isAnchoredSelectionActive() const;
KItemModelBase* model() const;
signals:
void currentChanged(int current, int previous);
void selectionChanged(const KItemSet& current, const KItemSet& previous);
private:
void setModel(KItemModelBase* model);
void itemsInserted(const KItemRangeList& itemRanges);
void itemsRemoved(const KItemRangeList& itemRanges);
void itemsMoved(const KItemRange& itemRange, const QList<int>& movedToIndexes);
/**
* Helper method for itemsRemoved. Returns the changed index after removing
* the given range. If the index is part of the range, -1 will be returned.
*/
int indexAfterRangesRemoving(int index, const KItemRangeList& itemRanges, const RangesRemovingBehaviour behaviour) const;
private:
int m_currentItem;
int m_anchorItem;
KItemSet m_selectedItems;
bool m_isAnchoredSelectionActive;
KItemModelBase* m_model;
friend class KItemListController; // Calls setModel()
friend class KItemListView; // Calls itemsInserted(), itemsRemoved() and itemsMoved()
friend class KItemListSelectionManagerTest;
};
#endif
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