How to debug into Qt libraries why derived dropMimeData is not being invoked?

[JohnGa]

Hello,
To solve a problem I need to have my derived dropMimeData be called by the underlying Qt framework. My situation: I have QTableView that is using a custom model derived from QAbstractTableModel.

I have set all the necessary properties on the QTableView for drag/drop. When I move a row within the table, I want to invoke the code in my derived dropMimeData.

After having poured through the various issues on the net, and also trying for hours, I cannot figure out why my derived dropMimeData is not being called when a row is moved within the table. If I could set breakpoints in the QAbstractTableModel methods, this problem would be so easy to solve.

How can I pull all the Qt classes into the project, in such a way that I can set breakpoints in them?

Thanks.

[SGaist]

Hi,

Might be a silly question but did you also setup your views correctly for drag and drop ?
If so, did you use the override keyword in your subclass ? It will make the compiler scream if you have the signature wrong because you'll be overriding a non-existing method.

[JohnGa]

SGaist, a huge thanks for your tip.

I combed through my code, and through all the samples. Finally found a difference that resolved the issue:

I was doing:

qTableView->verticalHeader()->setDragEnabled(true);

After adding the following line, now my derived dropMimeData is getting invoked.

qTableView->setDragEnabled(true);

Even though this resolves my issue, I still would like to figure out how to attach all the Qt framework source code. Debugging/stepping is a great way to learn frameworks. In the hopes of getting some guidance on how to attach the Qt framework source, I will leave this request open for a little bit. I am searching too. If I find a way, I will definitely post it here.

[aha_1980]

@JohnGa have you installed the Qt sources with MaintenanceTool?