src/client/selectionmodelsynchronizer.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2022 by the Quassel Project                        *
   3  *   devel@quassel-irc.org                                                 *
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  20
  21 #pragma once
  22
  23 #include "client-export.h"
  24
  25 #include <QItemSelectionModel>
  26 #include <QObject>
  27
  28 class QAbstractItemModel;
  29
  30 class CLIENT_EXPORT SelectionModelSynchronizer : public QObject
  31 {
  32     Q_OBJECT
  33
  34 public:
  35     SelectionModelSynchronizer(QAbstractItemModel* parent = nullptr);
  36
  37     void synchronizeSelectionModel(QItemSelectionModel* selectionModel);
  38     void removeSelectionModel(QItemSelectionModel* selectionModel);
  39
  40     inline QAbstractItemModel* model() { return _model; }
  41     inline QItemSelectionModel* selectionModel() const { return const_cast<QItemSelectionModel*>(&_selectionModel); }
  42     inline QModelIndex currentIndex() const { return _selectionModel.currentIndex(); }
  43     inline QItemSelection currentSelection() const { return _selectionModel.selection(); }
  44
  45 private slots:
  46     void syncedCurrentChanged(const QModelIndex& current, const QModelIndex& previous);
  47     void syncedSelectionChanged(const QItemSelection& selected, const QItemSelection& previous);
  48
  49     void setCurrentIndex(const QModelIndex& index);
  50     void setCurrentSelection(const QItemSelection& selection);
  51
  52     void currentChanged(const QModelIndex& current, const QModelIndex& previous);
  53     void selectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
  54
  55     void selectionModelDestroyed(QObject* object);
  56
  57 private:
  58     QAbstractItemModel* _model;
  59     QItemSelectionModel _selectionModel;
  60     bool _changeCurrentEnabled{true};
  61     bool _changeSelectionEnabled{true};
  62
  63     bool checkBaseModel(QItemSelectionModel* model);
  64     QModelIndex mapFromSource(const QModelIndex& sourceIndex, const QItemSelectionModel* selectionModel);
  65     QItemSelection mapSelectionFromSource(const QItemSelection& sourceSelection, const QItemSelectionModel* selectionModel);
  66     QModelIndex mapToSource(const QModelIndex& index, QItemSelectionModel* selectionModel);
  67     QItemSelection mapSelectionToSource(const QItemSelection& selection, QItemSelectionModel* selectionModel);
  68
  69     QSet<QItemSelectionModel*> _selectionModels;
  70 };