How to use the corner button of QTableView?

[tovax]

Hi, all
Click the button in the upper left corner of QTableView, the default function is to select the entire table. I want to display the "reset" text on this corner button and trigger a custom function after clicking it, such as clearing the QTableView. I did not find the signal of the corner button, and "setCornerWidget " cannot set another QPushButton correctly. Could you give me some suggestion please?
Best regards!

[Bonnie]

Qt doesn't have API for that. But I think it may be done by cheating ways. :)
And "setCornerWidget“ is a member function of QAbstractScrollArea, so it means the bottom right corner of the scroll bars.

[tovax]

@Bonnie When you said that, I found a small button in the bottom right corner. Thank you!
"by cheating ways", is it to create a new QPushbutton covering the upper left corner please?

[Bonnie]

I mean using QObject::findChild / QObject::findChildren like

//the top left corner button should be the only button that is the tableview's direct child
//If there are multiple, you should look for whose class name is "QTableCornerButton"
if(auto button = ui->tableWidget->findChild<QAbstractButton*>(QString(), Qt::FindDirectChildrenOnly)) {
    //this button is not a normal button, it doesn't paint text or icon
    //so it is not easy to show text on it, the simplest way is tooltip
    button->setToolTip("Reset");
    //disconnect the connected slots to the tableview (the "selectAll" slot)
    disconnect(button, Q_NULLPTR, ui->tableWidget, Q_NULLPTR);
    //connect "clear" slot to it, here I use QTableWidget's clear, you can connect your own
    connect(button, &QAbstractButton::clicked, ui->tableWidget, &QTableWidget::clear);
}

But covering it with another button also seems to be a workable approach, you can try that

[tovax]

@Bonnie Hi, Bonnie
Your reply solved my question, thank you very much!
I'm sorry I didn't get back to you in time.
Best Regards!

[Juri Sedov]

with Icon

ui->tableWidget->setStyleSheet( "QTableView QTableCornerButton::section{ background: red; border: 1px solid red; border-radius: 3px; image: url(:/bilder/ABC.ico); }");