Is there any way in Qt to make the QPushButton object invalid but not grayed out?

This can be achieved by adding a disabled file when setting the icon. The specific demonstration code is as follows:

QIcon icon;

icon . addfile(qstring literal(":/resources/log in . SVG "))；

icon . addfile(qstring literal(":/resources/log in _ Disabled . SVG ")，QSize()，QIcon::Disabled)；

auto button = new q button(tr(" log in "))；

Button-> SetIcon (icon);

Button-> set enabled(false)；

The mode displayed at this time is the image of login_disabled.svg