How to recent signal from proxyModel to model?

[zloi_templar]

Hello, i have next problem "QObject::connect(QItemSelectionModel, mainForm): invalid null parameter"

I just tried to connect signal, want to make some manipulations with form on selection, my code:

connect(tbSC->selectionModel(), &QItemSelectionModel::selectionChanged, this, &mainForm::enableButtons);

void mainForm::enableButtons(const QItemSelection &selected, const QItemSelection &)
{
    foreach(QModelIndex index, selected.indexes())
    {
        if(mdlSC->Columns[index.row()][0].toString()=="")
            continue;
        else
        {
            ui->btnMS->setEnabled(true);
            break;
        }
    }
}

slot is not called

I have next structure:

    tbSC = new tableSM(this);
    proxySM = new ProxyModelSM(tbSC);
    mdlSC = new modelSM(proxySM);

...

   proxySM->setSourceModel(mdlSC);
   tbSC->setModel(proxySM);

class tableSM : public QTableView
class modelSM : public QAbstractTableModel
class ProxyModelSM : public QSortFilterProxyModel

I think i must make smth like mapToSource, but idk how it make with signals, please help

[VRonin]

Your connect(tbSC->selectionModel() should be after tbSC->setModel(proxySM);

[jsulm]

@zloi_templar said in How to recent signal from proxyModel to model?:

connect(tbSC->selectionModel(), &QItemSelectionModel::selectionChanged, this, &mainForm::enableButtons);

Sounds like tbSC->selectionModel() returns a null pointer

[VRonin]

Your connect(tbSC->selectionModel() should be after tbSC->setModel(proxySM);

[zloi_templar]

@VRonin yea, ty, already fix it