Currently the tools still use qt4, which has been deprecated and gone out from some distro's main repositories, so an update or new toolkit should be in order, much like WED is getting.
Switch to FLTK is already on the way. See branch lin_fltk_dev .All GUI dependent xptools linked with Qt like XGrinder and ObjView are already changend but need a beta phase.
Currently the tools still use qt4, which has been deprecated and gone out from some distro's main repositories, so an update or new toolkit should be in order, much like WED is getting.