QTableView - Not Getting Selection Changed Signal

daviddoria

(There indeed is no selectionChanged signal of a QTableView, sorry)
-Do you really need the QItemSelectionModel? It doesn't sound like you are doing anything that complex. I think you want to connect the selectionChanged model of the VIEW to a slot.-

-connect(materialsTable,-
-SIGNAL(selectionChanged(const QItemSelection &, const QItemSelection &)),-
-dataModel,-
-SLOT(selectionChangedSlot(const QItemSelection &, const QItemSelection &)));-

I would also name your materialsTable materialsTableView or something like that - as to not confuse if the 'table' is a 'tableModel' or a 'tableView'.

jwomble

Does QTableView have a selectionChanged signal? I can't find it in the class reference.

daviddoria

Yep, it's in the superclass: http://developer.qt.nokia.com/doc/qt-4.8/qabstractitemview.html#signalSection

I was just complaining about that here :) : http://developer.qt.nokia.com/forums/viewthread/12604/

jwomble

I see a slot for selectionChanged() in QAbstractItemView, but not a signal.

daviddoria

Yikes - please ignore everything I've said so far - I was a bit confused (clearly).

Can you do this - handle the clicked() signal of the view (or the mouseRelease event if you're making bigger selections) and then use the view's selectedIndexes function to get the selection?

daviddoria

Gah - it is listed under public functions (http://developer.qt.nokia.com/doc/qt-4.8/qlistview.html#memberSection) even though it is protected (it even says protected right in the declaration in the doc!). Sorry, without subclassing the view this method won't do it for you.

jwomble

As far as I can tell, using the selectionModel is the correct way to do this, I just can't figure out what I'm doing wrong.

jwomble

What's the first thing you should check in QT when signals/slots don't seem to be working correctly? That your class has the Q_OBJECT macro in it. Added this to the APartsTable class definition, and now I'm hitting the breakpoint.

When does Friday get here?

daviddoria

Here is a compilable example:

http://programmingexamples.net/wiki/Qt/ModelView/ItemSelectionModel

goetz

The table implicitly has a selction model, get with <code>tableView->selectionModel()</code>, you don't need to create a new one.