Install gammaray-probe-qt4 by entering the following commands in the terminal:
sudo apt update sudo apt install gammaray-probe-qt4
Description:
GammaRay support for inspecting Qt4 applications
This package contains GammaRay probe libraries that have to be loaded into the application being inspected in order to allow GammaRay to examine its internals. The gammaray package already includes the probe binaries compiled for Qt5. Install this package if you want to use GammaRay with Qt4 applications.
Homepage: http://www.kdab.com/gammaray
Version: 2.7.0-1ubuntu8
Section: universe/devel