affine.pro Example File
painting/affine/affine.pro
  SOURCES += main.cpp xform.cpp
  HEADERS += xform.h
  qtHaveModule(opengl) {
          DEFINES += QT_OPENGL_SUPPORT
          QT += opengl
  }
  QT += widgets
  SHARED_FOLDER = ../shared
  include($$SHARED_FOLDER/shared.pri)
  RESOURCES += affine.qrc
  # install
  target.path = $$[QT_INSTALL_EXAMPLES]/widgets/painting/affine
  INSTALLS += target