[SOLVED] qSort() and iterator const-ness(?)

[zaphod.b]

Hi all,

to give you an idea of what I am trying to do:
My application loads a bunch of perspective plugins. Each perspective provides an action to activate itself. All actions are added to a QActionGroup that resides inside PerspectiveManager. Before the actions are presented in a toolbar, they need to be sorted.

I am not able to sort the list of actions as provided by QActionGroup::actions(). So far, I tend to relate my problem to the iterator's const-ness, but I may be mistaken. Please have a look:

QToolBar *PerspectiveManager::toolBar()
{
    //version 1 -- This doesn't sort:
    //QAlgorithmsPrivate::qSortHelper(..) returns immediately
    //due to RandomAccessIterator end < RandomAccessIterator start
    qSort(actionGroup_.actions().begin(),
          actionGroup_.actions().end(),
          sortOrder);
 
    //version 2 -- "Force non-const iterator" (?)
    //This enters sortOrder(..), but QAction *one and two
    //are not accessible there
    QList<QAction*>::iterator it1 = actionGroup_.actions().begin();
    QList<QAction*>::iterator it2 = actionGroup_.actions().end();
    qSort(it1,
          it2,
          sortOrder);
 
    toolBar_.clear();
    toolBar_.addActions(actionGroup_.actions());
    return &toolBar_;
}
 
//Not called when trying to sort as in version 1
bool PerspectiveManager::sortOrder(QAction *one, QAction *two)
{
    //demonstrate that one and two are not accessible in version 2
    //(running into SIGSEGV)
    QString s1(one->text());
    QString s2(two->text());
 
    //sorting shall be done via meta object system
    bool b = //one is somehow "less than" two
 
    return b;
}

QToolBar *PerspectiveManager::toolBar()
{
    //version 1 -- This doesn't sort:
    //QAlgorithmsPrivate::qSortHelper(..) returns immediately
    //due to RandomAccessIterator end < RandomAccessIterator start
    qSort(actionGroup_.actions().begin(),
          actionGroup_.actions().end(),
          sortOrder);

    //version 2 -- "Force non-const iterator" (?)
    //This enters sortOrder(..), but QAction *one and two
    //are not accessible there
    QList<QAction*>::iterator it1 = actionGroup_.actions().begin();
    QList<QAction*>::iterator it2 = actionGroup_.actions().end();
    qSort(it1,
          it2,
          sortOrder);

    toolBar_.clear();
    toolBar_.addActions(actionGroup_.actions());
    return &toolBar_;
}

//Not called when trying to sort as in version 1
bool PerspectiveManager::sortOrder(QAction *one, QAction *two)
{
    //demonstrate that one and two are not accessible in version 2
    //(running into SIGSEGV)
    QString s1(one->text());
    QString s2(two->text());

    //sorting shall be done via meta object system
    bool b = //one is somehow "less than" two

    return b;
}

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Bad thing is, I had it running in mock code, but am not getting there again...

Thanks for you consideration!