Qt Widget包含空白布局时会自动调整大小

Question

I have been given a qt widget containing some elements and layouts. I am trying to add an empty layout to this main widget (My plan is to populate it with a widget in the future). I am expecting the main widget to resize automatically if the layout is empty. How can I do that? I tried to play on the size policies of the widget but I did not get much results so far .

In the end the idea is to get the main widget (which is not contained in a layout by the way) to resize automatically if it contains an empty layout in itself

Answer 1

I think, you can look for adjustSize method of QWidget . When you add or remove any internal widget in layout, you can make something like this:

QTimer::singleShot(0, this, SLOT(slotAdjustSize()));

...

void YourWidget::slotAdjustSize()
{
    adjustSize();
}

Size of your widget will be fit to its contents.