How to get the correct sender from a custom widget

Rattata1234

Hello guys! This is my first post, hopefully i won't make too many mistakes.
Soo i have a problem using the QTableWidget and a custom widget. I created a custom widget containing a QPushButton and QComboBox. To goal is get the currentIndex from the combobox of the row, where the button was pressed. I forgot to mention that the combobox and the button are in the same row. Here is the code:

//for loop to fill all rows:
            PushButton *sendButton = new QPushButton();
            sendButton->setText("Send");

            QComboBox *myComboBox= new QComboBox();
            myComboBox->addItem("Test");

            QHBoxLayout *customLayout = new QHBoxLayout();
            customLayout->addWidget(myComboBox);
            customLayout->addWidget(sendButton);

            QWidget *customWidget = new QWidget();
            customWidget->setLayout(customLayout);

            ui->tableWidget->setCellWidget(row, 5, customWidget);
            commandComboBox->setProperty("row", row);
            sendButton->setProperty("row", row);

            connect(sendButton, SIGNAL(clicked()), this, SLOT(sendButtonClicked()));

void Test::sendButtonClicked()
{
    int row;

    QPushButton *myButton = qobject_cast<QPushButton *>(sender());
    row = myButton->property("row").toInt();//THIS seems to work

    QComboBox *myCombo = qobject_cast<QComboBox *>(sender());
    int index= myCombo->currentIndex();//<--------HERE is the problem

}

Can anyone tell me how i can get the current index from the "sender" comboBox?

Thank you!

mrjj

Hi and welcome :)

It seems you only hook up the button and its clicked() ?

so,
QComboBox *myCombo = qobject_cast<QComboBox *>(sender());
int index= myCombo->currentIndex();//<--------HERE is the problem

should crash as myCombo is NULL since its not a QComboBox but a QPushButton..
(so the cast fails)

If you hook up the combobox signal
currentIndexChanged(int index)
to a slot u can get it directly when user click in it.

Rattata1234

@mrjj Thank you!
Sooo i kind of did what you said and used the currentIndexChanged signal. I made a Qbytearray where i store the currentindex and replace the index when an index changed. Then i can use this array to get the currentIndex from the row where the button was pressed. I know that there is probably a better solution but it works^^
I will mark this post as answered i guess.