how to display background when all QTabWidgets are closed

[Blackzero]

How to display a background image when all tabs from QTabwidget are closed, for example like Visual studio code when all tabs are closed there is a background, is that possible?

for example like this image when all tabs are closed there is a background image

[JonB]

@Blackzero
Did you try

QTabWidget
{
background-image: url(:/img/background.png);
}

?

If that does not work (because QTabWidget is empty/has no tabs, or you don't want it when there are some tabs) more advanced discussion in https://forum.qt.io/topic/145432/how-to-set-the-qtabwidget-background-image-when-there-is-not-any-widget-page.

[Blackzero]

@JonB I modeled the code of Abderrahmene_Rayenein my own way, so every time I add a new tab I have to clear the setStyleSheet I don't know if this is efficient.

void MainWindow::on_tabWidget_tabCloseRequested(int index)
{
    ui->tabWidget->removeTab(index);
    if (ui->tabWidget->count() == 0)
    {
        ui->tabWidget->setStyleSheet("image: url(:/img/default.png);");
    }
    else
    {
        ui->tabWidget->setStyleSheet("");
    }
}

[JonB]

@Blackzero
Seems reasonable to me. I don't know why you changed it to do it on QTabWidget::tabCloseRequested rather than QTabWidget::currentChanged or why you use image: rather than background-image: but doubtless these work for you.