src/client/mappedselectionmodel.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-08 by the Quassel Project                          *
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  20
  21 #include "mappedselectionmodel.h"
  22
  23 #include <QItemSelectionModel>
  24 #include <QAbstractItemModel>
  25 #include <QAbstractProxyModel>
  26 #include <QLinkedList>
  27 #include <QDebug>
  28
  29 MappedSelectionModel::MappedSelectionModel(QAbstractItemModel *model)
  30   : QItemSelectionModel(model)
  31 {
  32 }
  33
  34 QModelIndex MappedSelectionModel::mapFromSource(const QModelIndex &sourceIndex) {
  35   QModelIndex proxyIndex = sourceIndex;
  36   QLinkedList<const QAbstractProxyModel *> proxies;
  37   const QAbstractItemModel *baseModel = model();
  38   const QAbstractProxyModel *proxyModel = 0;
  39   while((proxyModel = qobject_cast<const QAbstractProxyModel *>(baseModel)) != 0) {
  40     proxies.push_back(proxyModel);
  41     baseModel = proxyModel->sourceModel();
  42     if(baseModel == sourceIndex.model())
  43       break;
  44   }
  45
  46   while(!proxies.isEmpty()) {
  47     proxyModel = proxies.takeLast();
  48     proxyIndex = proxyModel->mapFromSource(proxyIndex);
  49   }
  50   return proxyIndex;
  51 }
  52
  53 QItemSelection MappedSelectionModel::mapSelectionFromSource(const QItemSelection &sourceSelection) {
  54   if(sourceSelection.isEmpty())
  55     return sourceSelection;
  56
  57   QItemSelection proxySelection = sourceSelection;
  58   QLinkedList<const QAbstractProxyModel *> proxies;
  59   const QAbstractItemModel *baseModel = model();
  60   const QAbstractProxyModel *proxyModel = 0;
  61   while((proxyModel = qobject_cast<const QAbstractProxyModel *>(baseModel)) != 0) {
  62     proxies.push_back(proxyModel);
  63     baseModel = proxyModel->sourceModel();
  64     if(baseModel == sourceSelection.first().model())
  65       break;
  66   }
  67
  68   while(!proxies.isEmpty()) {
  69     proxyModel = proxies.takeLast();
  70     proxySelection = proxyModel->mapSelectionFromSource(proxySelection);
  71   }
  72   return proxySelection;
  73 }
  74
  75 void MappedSelectionModel::mappedSetCurrentIndex(const QModelIndex &index, QItemSelectionModel::SelectionFlags command) {
  76   setCurrentIndex(mapFromSource(index), command);
  77 }
  78
  79 void MappedSelectionModel::mappedSelect(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command) {
  80   select(mapSelectionFromSource(selection), command);
  81 }
  82