You've created a Glade project, have C++ files that you need to compile with the Glade C ones, but found Glademm doesn't seem to work for you. What to do? Create a regular Glade build, but complile everything as C++ files. My recipe:

1) do a fresh C-code build from your personally created Glade file
2) change all the src/*.c file to src/*.cpp files, and add your files
3) change all the *.c entries in src/Makefile.am to *.cpp files, and add names of your files
4) (if necessary) change all the *.c entries in po/POTFILES.in to *.cpp files (and maybe add names of your files?)
5) add the line AC_PROG_CXX to file configure.in
6) run ./autogen.sh

[NOTE: I guess the other option may have been just changing the default compiler to g++ in the makefile, but I don't like it because really I should indicate that the new files are now being treated like C++ files, in case I change something in them that requires C++ later.]

UPDATE: Glade allows you to name the extensions on your filenames, so it is even easier --  just default all of them to the above names. Furthermore, it allows you to work via glade right in the current directory (not edit elsewhere and then re-aquaint all the parts).
