KIdleTime
Reporting of idle time of user and system.
KIdleTime is a singleton reporting information on idle time. It is useful not only for finding out about the current idle time of the PC, but also for getting notified upon idle time events, such as custom timeouts, or user activity.
Using the Module
Using a KDE module's C++ API requires linking against the module library. The preferred way of consuming the library is through CMake.
Building with CMake
Use the find_package() command to locate the needed module component in the KF6 package:
find_package(KF6 REQUIRED COMPONENTS IdleTime)
target_link_libraries(mytarget PRIVATE KF6::IdleTime)
For more details, see the Build with CMake overview.