undo.pro Example File

tools/undo/undo.pro
 QT += widgets
 requires(qtConfig(undoview))

 SOURCES += main.cpp mainwindow.cpp commands.cpp document.cpp
 HEADERS += mainwindow.h commands.h document.h
 FORMS += mainwindow.ui

 build_all:!build_pass {
     CONFIG -= build_all
     CONFIG += release
 }

 RESOURCES += undo.qrc

 # install
 target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tools/undo
 INSTALLS += target