Something in Qt broke and I can't compile anymore. QVBoxLayout doesn't name a type. [solved]



  • The problem is - everything was working fine, then I changed QVBoxLayout to QGridLayout after that if I include <QGridLayout> or any other Layout related stuff I get this kind of errors (they appear in projects that were builing just fine before)
    @In file included from ....\Qt\5.2.1\mingw48_32\include/QtGui/qwindowdefs.h:45:0,
    from ....\Qt\5.2.1\mingw48_32\include\QtWidgets/qwidget.h:45,
    from ....\Qt\5.2.1\mingw48_32\include\QtWidgets/QWidget:1,
    from ..\DZ\HW14_7\TicTacToe\tictactoe.h:4,
    from ..\DZ\HW14_7\TicTacToe\tictactoe.cpp:1:
    ....\Qt\5.2.1\mingw48_32\include/QtWidgets/qboxlayout.h:137:20: error: 'QVBoxLayout' does not name a type
    Q_DISABLE_COPY(QVBoxLayout)
    ^
    ....\Qt\5.2.1\mingw48_32\include/QtCore/qglobal.h:978:17: note: in definition of macro 'Q_DISABLE_COPY'
    Class(const Class &) Q_DECL_EQ_DELETE;
    ^
    ....\Qt\5.2.1\mingw48_32\include/QtCore/qglobal.h:978:23: error: ISO C++ forbids declaration of 'parameter' with no type [-fpermissive]
    Class(const Class &) Q_DECL_EQ_DELETE;
    ^
    ....\Qt\5.2.1\mingw48_32\include/QtWidgets/qboxlayout.h:137:5: note: in expansion of macro 'Q_DISABLE_COPY'
    Q_DISABLE_COPY(QVBoxLayout)
    ^
    In file included from ....\Qt\5.2.1\mingw48_32\include/QtCore/qglobal.h:71:0,
    from ....\Qt\5.2.1\mingw48_32\include/QtGui/qwindowdefs.h:45,
    from ....\Qt\5.2.1\mingw48_32\include\QtWidgets/qwidget.h:45,
    from ....\Qt\5.2.1\mingw48_32\include\QtWidgets/QWidget:1,
    from ..\DZ\HW14_7\TicTacToe\tictactoe.h:4,
    from ..\DZ\HW14_7\TicTacToe\tictactoe.cpp:1:
    ....\Qt\5.2.1\mingw48_32\include/QtCore/qcompilerdetection.h:787:29: error: ISO C++ forbids declaration of 'QVBoxLayout' with no type [-fpermissive]

    define Q_DECL_EQ_DELETE = delete

                             ^
    

    ....\Qt\5.2.1\mingw48_32\include/QtCore/qglobal.h:978:26: note: in expansion of macro 'Q_DECL_EQ_DELETE'
    Class(const Class &) Q_DECL_EQ_DELETE;
    ^
    ....\Qt\5.2.1\mingw48_32\include/QtWidgets/qboxlayout.h:137:5: note: in expansion of macro 'Q_DISABLE_COPY'
    Q_DISABLE_COPY(QVBoxLayout)
    ^
    In file included from ....\Qt\5.2.1\mingw48_32\include/QtGui/qwindowdefs.h:45:0,
    from ....\Qt\5.2.1\mingw48_32\include\QtWidgets/qwidget.h:45,
    from ....\Qt\5.2.1\mingw48_32\include\QtWidgets/QWidget:1,
    from ..\DZ\HW14_7\TicTacToe\tictactoe.h:4,
    from ..\DZ\HW14_7\TicTacToe\tictactoe.cpp:1:
    ....\Qt\5.2.1\mingw48_32\include/QtWidgets/qboxlayout.h:137:20: error: 'QVBoxLayout' does not name a type
    Q_DISABLE_COPY(QVBoxLayout)
    ^
    ....\Qt\5.2.1\mingw48_32\include/QtCore/qglobal.h:979:5: note: in definition of macro 'Q_DISABLE_COPY'
    Class &operator=(const Class &) Q_DECL_EQ_DELETE;
    ^@


  • Lifetime Qt Champion

    Hi and welcome to devnet,

    You are probably just missing:

    @QT += widgets@

    in your pro file.

    In Qt 5, the Qt widgets have been moved in their own module



  • Thanks for response.

    [quote author="SGaist" date="1397848890"]
    You are probably just missing:

    @QT += widgets@

    in your pro file.
    [/quote]
    Nope, just checked to be sure. It's even appears on freshly created QtWidget program, as soon as you write #include <SomethingRelatedToLayout> somewhere. And it compiles on my notebook just fine. (and compiled before "something" happened to Qt/Creator).


  • Lifetime Qt Champion

    Can you check that the header hasn't been modified accidentally ?



  • [quote author="SGaist" date="1397861077"]Can you check that the header hasn't been modified accidentally ?[/quote]
    In mingw48_32\include\QtWidgets all headers haven't been modified since installation. I guess I'll have to reinstall my Qt. I want to know what caused this sort of behavior, though.


  • Lifetime Qt Champion

    Search/Replace on the wrong set of files, gremlins… There's a lot of possibilities



  • [quote author="SGaist" date="1397938167"]Search/Replace on the wrong set of files, gremlins… There's a lot of possibilities[/quote]
    Probably gremlins. Haven't touched any of qt files.
    Was just playing around in simple test widget project. Decided to change VBox to Grid and that happened.


  • Lifetime Qt Champion

    You might have had one or more of Qt's header file opened and did a search/replace on all opened documents and bam, there's your gremlins playing hell on your setup



  • [quote author="SGaist" date="1397940269"]You might have had one or more of Qt's header file opened and did a search/replace on all opened documents and bam, there's your gremlins playing hell on your setup[/quote]

    Is where a way to fix it without re-downloading all of the Qt?


  • Lifetime Qt Champion

    You can try downloading only the sources, and replace the headers with those from the sources



  • [quote author="SGaist" date="1397944104"]You can try downloading only the sources, and replace the headers with those from the sources[/quote]
    Thanks. That helped.


  • Lifetime Qt Champion

    You're welcome !

    If you have everything working now, please update the thread title prepending [solved] so other forum users may know a solution has been found :)


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