TEMPLATE = app QT += widgets requires(qtConfig(combobox)) HEADERS += colorswatch.h mainwindow.h toolbar.h SOURCES += colorswatch.cpp mainwindow.cpp toolbar.cpp main.cpp build_all:!build_pass { CONFIG -= build_all CONFIG += release } RESOURCES += mainwindow.qrc # install target.path = $$[QT_INSTALL_EXAMPLES]/widgets/mainwindows/mainwindow INSTALLS += target