// We should let GTK+ IM filter key event first. According to GTK+ 2.0 API
// docs, if IM filter returns true, no further processing should be done.
// we should send the key_down event anyway.
// We should let GTK+ IM filter key event first. According to GTK+ 2.0 API
// docs, if IM filter returns true, no further processing should be done.
// we should send the key_down event anyway.