Hi,

during my KDE4 porting for KFileWidget and KDirOperator I faced some 
interfaces which should be fixed, but I initially thought to postpone this 
for KDE5 as we somewhen have to stop changing interfaces...

Anyway after commiting a comment for KDE 5 Oswald replied:
> > SVN commit 708602 by ppenz:
> >
> > added comment for KDE5 (no typo ;-))
> >
> > --- trunk/KDE/kdelibs/kfile/kfilewidget.h #708601:708602
> > @@ -257,7 +257,8 @@
> > -   virtual void setPreviewWidget(const KPreviewWidgetBase *w);
> > +    // ### KDE5: remove 'const', as the widget must get layouted and
> > will be deleted +    virtual void setPreviewWidget(const
> > KPreviewWidgetBase *w);
>
> that's silly. there is no reason not to make such an unobtrusive change
> next monday.

I'm not aware about any application using a custom preview widget in the file 
dialog, so I agree to Oswald that the interface change would be unobtrusive.

Changing the interface would imply to change:
  - void KDirOperator::setPreviewWidget(const QWidget *w)
  + void KDirOperator::setPreviewWidget(KPreviewWidgetBase *w)
to prevent nasty casts...

Is it OK doing this change next Monday? I fully understand if the answer 
is 'no'...

Thanks!
Peter