Slicer  4.8
Slicer is a multi-platform, free and open source software package for visualization and medical image computing

Measurements → Base Relation

File in Modules/Loadable/MeasurementsIncludes file in Base
qSlicerMeasurementsModule.hQTGUI / qSlicerLoadableModule.h
qSlicerMeasurementsModuleWidget.hQTGUI / qSlicerAbstractModuleWidget.h
Widgets / qSlicerMeasurementsAngleWidget.hQTGUI / qSlicerWidget.h
Widgets / qSlicerMeasurementsRulerWidget.hQTGUI / qSlicerWidget.h