custom QLayout undeclared identifier 'margin()'

[ZeusFa]

I tried to copy the Qt code I wrote before, but I found that there is a definition missing

int heightForWidth(int width) const override
{
        int height = (width - 2 * margin()) / m_aspectRatio + 2 * margin();
        return height;
}

[JonB]

@ZeusFa
QLayout has a heightForWidth() (from QLayoutItem) which you can override, so I guess that is the method you are showing here.

It has no margin() method anywhere, hence the code above won't compile. Maybe you wrote another class. Maybe you added a method.

[SGaist]

Hi,

You are trying to use code that was done with an older version of Qt. The margin method was already obsoleted with Qt 5 and was removed with Qt 6.

You should use contentsMargins.