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