QT += opengl widgets requires(qtConfig(combobox)) qtConfig(opengles.|angle|dynamicgl): error("This example requires Qt to be configured with -opengl desktop") HEADERS += 3rdparty/fbm.h \ glbuffers.h \ glextensions.h \ gltrianglemesh.h \ qtbox.h \ roundedbox.h \ scene.h \ trackball.h SOURCES += 3rdparty/fbm.c \ glbuffers.cpp \ glextensions.cpp \ main.cpp \ qtbox.cpp \ roundedbox.cpp \ scene.cpp \ trackball.cpp RESOURCES += boxes.qrc # install target.path = $$[QT_INSTALL_EXAMPLES]/widgets/graphicsview/boxes INSTALLS += target