QAxBindable::createAggregate() reimplementation building with MS VS 2012 problem



  • Hi, all!

    I need to create COM server. I tried to use example from https://qt-project.org/books/view/c_gui_programming_with_qt_4_2nd_edition_the_official_c_qt_book

    chapter 23 AxBouncing.

    1. here authors creates safety sertificate to cheat IE. on my system the project is not built.
      I'm using Qt5.2.0 + add-on to MS VS 2012 + MS VS 2012 + update 4 + Win7 SP1 x64
      the errors are:
      QtCore/qobjectdefs.h(489): error C2027: use of undefined type 'QWidget'
      QtCore/qobjectdefs.h(489): error C2056: illegal expression
      QtCore/qobject.h(520): error C2338: qobject_cast requires the type to have a Q_OBJECT macro
      QtCore/qobject.h(522): error C2027: use of undefined type 'QWidget'
      QtCore/qmetatype.h(1264) : see declaration of 'QWidget'
      QtCore/qobject.h(522): error C2227: left of '->staticMetaObject' must point to class/struct/union/generic type
      QtCore/qobject.h(522): error C2228: left of '.cast' must have class/struct/union

    if I add #include <QWidget> in objectsafetyimpl.h I get only one error:
    qtwidgets\qwidget.h(741): error C2908: explicit specialization; 'T qobject_cast<QWidget*>(QObject *)' has already been instantiated

    but I can build the project if I throw away QAxBindable::createAggregate() and class ObjectSafetyImpl

    why is it so?

    1. even well compiled server doesn't work in IE - it's well registered with regsvr32.exe... but nothing happens. see3 demo.html from the book.

    How to make it work?

    the only modifications in project from my side are in .pro (I use axserver instead of qaxserver, 'cuase it's Qt5.2.0 not Qt4.5):
    @
    TEMPLATE = lib
    CONFIG += dll axserver

    greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
    QT += core gui axserver

    HEADERS = axbouncer.h objectsafetyimpl.h
    SOURCES = axbouncer.cpp
    main.cpp objectsafetyimpl.cpp

    RC_FILE = qaxserver.rc
    DEF_FILE = qaxserver.def
    @

    [edit: added coding tags @ SGaist ]


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