qt-everywhere-src-5.14.1/qtbase/examples/widgets/desktop/systray/systray.pro

HEADERS       = window.h
SOURCES       = main.cpp \
                window.cpp
RESOURCES     = systray.qrc

QT += widgets
requires(qtConfig(combobox))

# install
target.path = $$[QT_INSTALL_EXAMPLES]/widgets/desktop/systray
INSTALLS += target