Install headers in corresponding directories - header-files

Question

I am trying to install headers of my library using QMake. These headers gave a hierarchical order that must be applied on installation target as well. My current solution for this is to add many targets (each for one subdirectory):
...
headers.path = /usr/include/foo/widgets
headers_base.path = /usr/include/foo/widgets
headers_data.path = /usr/include/foo/widgets/data
headers_editors.path = /usr/include/foo/widgets/editors
...
HEADERS_BASE += \
foo.hpp \
bar.hpp
HEADERS_DATA += \
data/foo.hpp \
data/bar.hpp
HEADERS_EDITORS += \
editors/foo.hpp \
editors/bar.hpp
...
HEADERS += $$HEADERS_BASE \
$$HEADERS_DATA \
$$HEADERS_EDITORS
This is tedius and error-prune. I would like to use something simple and straightforward like nobase in autotools. Something like this:
magic_HEADERS += \
foo.hpp \
bar.hpp
data/foo.hpp \
data/bar.hpp
editors/foo.hpp \
editors/bar.hpp
Note
Having
HEADERS += \
foo.hpp \
bar.hpp
data/foo.hpp \
data/bar.hpp
editors/foo.hpp \
editors/bar.hpp
Installs all headers in a single directory.

Answer 1

Headers will be installed if you change .pro file with example:
HEADERS += \
include/widgets/foo.hpp \
include/widgets/bar.hpp \
include/widgets/data/foo.hpp \
include/widgets/data/bar.hpp \
include/widgets/editors/foo.hpp \
include/widgets/editors/bar.hpp
unix {
headers.path = /usr/local/include
headers.files = $$PWD/include/*
target.path = /usr/local/lib
INSTALLS += target headers
}