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Qt-interest Archive, November 2006
pass-through proxy models don't work with QDirModel?

Message 1 in thread

It seems as thought a simple QAbstractProxyModel will not work on a
QDirModel using a QListView. the attached example shows this. Is there
somthing I'm doing wrong?



#include <QApplication>
#include <QAbstractProxyModel>
#include <QDirModel>
#include <QListView>

class ToggleProxyModel : public QAbstractProxyModel
{
  bool m_cleared;

public:

  ToggleProxyModel(QAbstractItemModel *parent)
    : QAbstractProxyModel(parent)
  {
    setSourceModel(parent);
  }

  QModelIndex index(int row, int column, const QModelIndex
&parent=QModelIndex()) const
  {
    return mapFromSource(sourceModel()->index(row, column, parent));
  }

  QModelIndex parent(const QModelIndex &index) const
  {
    return sourceModel()->parent(index);
  }

  QModelIndex mapToSource(const QModelIndex &proxyIndex) const
  {
    return sourceModel()->index(proxyIndex.row(), proxyIndex.column(),
proxyIndex.parent());
  }

  QModelIndex mapFromSource(const QModelIndex &sourceIndex) const
  {
    return createIndex(sourceIndex.row(), sourceIndex.column(),
sourceIndex.internalPointer());
  }

  int rowCount(const QModelIndex &index=QModelIndex()) const
  {
    return sourceModel()->rowCount(index);
  }

  int columnCount(const QModelIndex &index=QModelIndex()) const
  {
    return sourceModel()->columnCount(index);
  }

};


int main(int argc, char **argv)
{
  QApplication app(argc, argv);
  QListView lw;
  QDirModel *source = new QDirModel(&lw);
  ToggleProxyModel *proxy = new ToggleProxyModel(source);
  lw.setModel(proxy);
  QModelIndex index = proxy->mapFromSource(source->index("/"));
  lw.setRootIndex(index);
  lw.show();
  app.exec();
}



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