QTableWidget cellwidget set invisible become visible after column resize

hbatalha

I have a QTableWidget where I have cells that contain a QPushButton and at some point I won't need those buttons anymore so instead of removing (removeCellWidget) I decided to just make them invisible. However, after I do it, if that cell size ever changes, during a window resize for example, the buttons recently setVisible(false) become visible again.

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    ui->table->setRowCount(1);

    QPushButton *p = new QPushButton("Test");

    ui->table->setCellWidget(0, 0, p);

    connect(p, &QPushButton::clicked, [p]()
    {
        p->setVisible(false);
    });

}

With this minimum working example, after clicking the button it becomes invisible but if you resize the column or row it becomes visible again.

Is it meant to behave like this?

SGaist

Hi,

Which version of Qt are you using ?
On which platform ?

hbatalha

@SGaist Qt 6.0.1
Both Linux and Windows.

SGaist

Can you check with Qt 5.15 ?

hbatalha

@SGaist Just tested, same results

SGaist

While it might seem surprising, I would say it's not unexpected. The goal of setWidget is to show static content so handling its visibility is likely not something that has been implemented.

hbatalha

@SGaist I would say it is not right though, it is very counter-intuitive and there is nothing about this in the doc that I could find. Thank you for the explanation.

So to solve my problem I had to remove the cellWidget.

SGaist

One thing you can do is to check the bug report system. If there's nothing there, you can consider opening a new ticket providing a minimal compilable example.

hbatalha

@hbatalha Done, https://bugreports.qt.io/browse/QTBUG-92573

Christian Ehrlicher

Dupe of https://bugreports.qt.io/browse/QTBUG-13522 - don't use widgets in itemviews. We really should have deprecate this widget inside item views stuff in Qt6...