[Solved] Get signal for internalMove in QListView.

[Socapex]

Hello,

I have been researching how to do this for the whole night now (4 hours approx.) and I am slowly going insane. I have a non-modified simple QListView, user can drag & drop to move items (it doesn't accept external drops etc.)

How can I register to a signal/event without reimplementing the QListView class? I simply want to update the backend with the new order when an item is reordered.

Thank you for helping me keep the last little bit of sanity I have.

[SGaist]

Hi,

I'd rather look on the model side with "rowsMoved":http://doc.qt.io/qt-5/qabstractitemmodel.html#rowsMoved and friends

Hope it helps

[Socapex]

Hi!I just figured that out, and came to answer my own question, and there is your post :). Thank you so much for the exactly 100% correct answer.

For future reference:

There may be more than 1 way to do this. It will work with an event filter. The problem is that from what I read, event filters are not as optimal as signals. They are called often etc. Quick example:

@// Setting it up
ui->myObject->installEventFilter(this);

// Implementation
bool Bla::eventFilter(QObject *object, QEvent *event) {
if (object == ui->myObject) {
if (event->type() == QEvent::ChildRemoved) {
qDebug() << "drop event!";
return true;
} else {
qDebug() << "Not a drop event";
return false;
}
}
}@

The better solution is the rowsMoved signal, more specifically:

@// Connect the signal like this
connect(ui->myObject->model(), SIGNAL(rowsMoved(QModelIndex, int, int, QModelIndex, int)), this, SLOT(test(QModelIndex, int, int, QModelIndex, int)));

// Implementation is the same as usual.@

BIG sigh of relief.