src/client/selectionmodelsynchronizer.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2018 by the Quassel Project                        *
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  20
  21 #pragma once
  22
  23 #include "client-export.h"
  24
  25 #include <QObject>
  26 #include <QItemSelectionModel>
  27
  28 class QAbstractItemModel;
  29
  30 class CLIENT_EXPORT SelectionModelSynchronizer : public QObject
  31 {
  32     Q_OBJECT
  33
  34 public:
  35     SelectionModelSynchronizer(QAbstractItemModel *parent = 0);
  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;
  61     bool _changeSelectionEnabled;
  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 };