Receiving GStat messages in GladeVCPs

    GSTAT.connect("file-loaded", self.file_loaded)

    def file_loaded(self, obj, data):
        print("FILE LOADED:", data)

        # file changed
        file_old = old.get('file', None)
        file_new = self.old['file']
        if file_new != file_old:
            # if interpreter is reading or waiting, the new file
            # is a remap procedure, with the following test we
            # partly avoid emitting a signal in that case, which would cause
            # a reload of the preview and sourceview widgets.  A signal could
            # still be emitted if aborting a program shortly after it ran an
            # external file subroutine, but that is fixed by not updating the
            # file name if call level != 0 in the merge() function above.
            # do avoid that a signal is emitted in that case, causing
            # a reload of the preview and sourceview widgets
            if self.stat.interp_state == linuxcnc.INTERP_IDLE:
                self.emit('file-loaded', file_new)