src/client/selectionmodelsynchronizer.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-08 by the Quassel Project                          *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
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  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
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  20
  21 #include "selectionmodelsynchronizer.h"
  22
  23
  24 #include <QAbstractItemModel>
  25 #include "mappedselectionmodel.h"
  26
  27 #include <QDebug>
  28
  29 SelectionModelSynchronizer::SelectionModelSynchronizer(QAbstractItemModel *parent)
  30   : QObject(parent),
  31     _model(parent)
  32 {
  33 }
  34
  35 SelectionModelSynchronizer::~SelectionModelSynchronizer() {
  36 }
  37
  38 void SelectionModelSynchronizer::addSelectionModel(MappedSelectionModel *selectionmodel) {
  39   if(selectionmodel->model() == model()) {
  40     addRegularSelectionModel(selectionmodel);
  41     return;
  42   }
  43
  44   if(selectionmodel->baseModel() != model()) {
  45     qWarning() << "cannot Syncronize SelectionModel" << selectionmodel << "which has a different baseModel()";
  46     return;
  47   }
  48
  49   connect(selectionmodel, SIGNAL(mappedCurrentChanged(QModelIndex)),
  50           this, SLOT(_mappedCurrentChanged(QModelIndex)));
  51   connect(selectionmodel, SIGNAL(mappedSelectionChanged(QItemSelection)),
  52           this, SLOT(_mappedSelectionChanged(QItemSelection)));
  53
  54   connect(this, SIGNAL(setCurrentIndex(QModelIndex, QItemSelectionModel::SelectionFlags)),
  55           selectionmodel, SLOT(mappedSetCurrentIndex(QModelIndex, QItemSelectionModel::SelectionFlags)));
  56   connect(this, SIGNAL(select(QItemSelection, QItemSelectionModel::SelectionFlags)),
  57           selectionmodel, SLOT(mappedSelect(QItemSelection, QItemSelectionModel::SelectionFlags)));
  58 }
  59
  60 void SelectionModelSynchronizer::addRegularSelectionModel(QItemSelectionModel *selectionmodel) {
  61   if(selectionmodel->model() != model()) {
  62     qWarning() << "cannot Syncronize QItemSelectionModel" << selectionmodel << "which has a different model()";
  63     return;
  64   }
  65   connect(selectionmodel, SIGNAL(currentChanged(QModelIndex, QModelIndex)),
  66           this, SLOT(_regularCurrentChanged(QModelIndex, QModelIndex)));
  67   connect(selectionmodel, SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
  68           this, SLOT(_regularSelectionChanged(QItemSelection, QItemSelection)));
  69
  70   connect(this, SIGNAL(setCurrentIndex(QModelIndex, QItemSelectionModel::SelectionFlags)),
  71           selectionmodel, SLOT(setCurrentIndex(QModelIndex, QItemSelectionModel::SelectionFlags)));
  72   connect(this, SIGNAL(select(QItemSelection, QItemSelectionModel::SelectionFlags)),
  73           selectionmodel, SLOT(select(QItemSelection, QItemSelectionModel::SelectionFlags)));
  74
  75 }
  76
  77 void SelectionModelSynchronizer::removeSelectionModel(MappedSelectionModel *model) {
  78   disconnect(model, 0, this, 0);
  79   disconnect(this, 0, model, 0);
  80 }
  81
  82 void SelectionModelSynchronizer::_mappedCurrentChanged(const QModelIndex &current) {
  83   emit setCurrentIndex(current, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
  84 }
  85
  86 void SelectionModelSynchronizer::_mappedSelectionChanged(const QItemSelection &selected) {
  87   emit select(selected, QItemSelectionModel::ClearAndSelect);
  88 }
  89
  90 void SelectionModelSynchronizer::_regularCurrentChanged(const QModelIndex &newCurrent, const QModelIndex &oldCurrent) {
  91   Q_UNUSED(oldCurrent)
  92   emit setCurrentIndex(newCurrent, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
  93 }
  94
  95 void SelectionModelSynchronizer::_regularSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected) {
  96   Q_UNUSED(selected)
  97   Q_UNUSED(deselected)
  98   QItemSelectionModel *selectionModel = qobject_cast<QItemSelectionModel *>(sender());
  99   emit select(selectionModel->selection(), QItemSelectionModel::ClearAndSelect);
 100 }