Subclassed QSortFilterProxyModel doesn't forward dataChanged signal
-
Hi,
I've got my (QAbstractTableModel) model that occasionally emits the dataChanged signal. Then I've got a (QTableView) view which has a reimplemented dataChanged slot containing
@qDebug() << "Yay!";@If I directly set the model to the view, "Yay!" is printed as expected, so that seems to work fine.
Between model and view, I actually place a QSortFilterProxyModel subclass. The only thing this subclass reimplements is:
@::headerData(int section, Qt::Orientation orientation, int role) const
::columnCount(const QModelIndex &parent) const
::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const@And these three (apart from being very simple) seem to work fine, since column removing/adding/sorting etc. works as expected.
But "Yay!" never happens.
I've checked the QSortFilterProxyModel source code and it seems to me, the dataChanged is handled, at least they connect it to "_q_sourceDataChanged" which does some fancy source-proxy-mapping.Any hints what I'm doing wrong would be nice.
-
Ha!
It's always the things that "are correct for sure" that bite you!
Turns out just printing "Yey!" wasn't so smart, the parameters I passed to dataChanged were wrong and so the filter proxy didn't let the signal through.I emitted like this:
@emit dataChanged(index(id, 0), index(id, columnCount()));@
When I should have emitted
@emit dataChanged(index(id, 0), index(id, columnCount()-1));@
Obviously ;)
Sadly this "column out of bounds" situation doesn't produce any qDebug output in the model or view, but is silently turned into column id -1 and row id 0 (!). Sneaky.