How to hide all widgets from a QVBoxLayout with spacer?

[A Former User]

Hey,

I have created this GUI in Qt Creator.

Now I want to make some kind of edit mode. For this I want to hide the left layout of the image completely. I have tried this:

void MainWindow::activateEditMode() const
{
    for (int widgetNumber = 0; widgetNumber < ui->modelLayout->count(); widgetNumber++) {
        ui->modelLayout->itemAt(widgetNumber)->widget()->hide();
    }
}

However, the program crashes with a segmentation fault if the spacer is to be "hidden". What I have also read that layouts can not be hidden. What is the best way to do something like this?

[SGaist]

Hi,

Check that the returned value of widget() is not null.

[mpergand]

The culprit is the spacer, because it's not a widget.

IMO, I will put all the left items in a single QWidget and hide/show it instead.

[A Former User]

@SGaist

After I checked the value it works! Thanks

@mpergand
I have also read that on the Internet. The "morph into" function in the QT creator does exactly what you write, doesn't it? There I can also convert the layout into a QWidget.

[mpergand]

@Gabber said in How to hide all widgets from a QVBoxLayout with spacer?:

The "morph into" function in the QT creator does exactly what you write, doesn't it? There I can also convert the layout into a QWidget.

I have hard time to figure out how to convert (morph?) a layout to a widget.