Hey
I don't understand exactly. But when i put the Q_Object macro in VideoPlayer, I
ghet the errors:
...Debug/moc_videoplayer.cpp:70: Fehler:'QObject' is an ambiguous base of
'VideoPlayer'
Shouldn't VideoPlayer inherit this macro from PlayerBase since it is a derived
class?
class VideoPlayer : public PlayerBase, public IControllable, public IPlaceable
{
Q_INTERFACES(PlayerBase IControllable IPlaceable)
...
}
class PlayerBase : public QObject
{
Q_OBJECT
...
}
Freundliche Grüsse / Best Regards / Meilleures salutations
Adrian Stern
______________
-----Original Message-----
From: Giuseppe D'Angelo [mailto:dange...@gmail.com]
Sent: 07 May 2013 14:46
To: Adrian Stern; interest@qt-project.org
Subject: Re: [Interest] error connecting signals
Hi, please keep the discussion on the list.
On 7 May 2013 14:08, Adrian Stern <adrian.st...@screenfood.com> wrote:
> It was in the VideoPlayer whil it wasn't working. Now that it is in
> PlayerBase it is working.
> Why?
Because, as you said, VideoPlayer was lacking the Q_OBJECT macro.
Rule of thumb: put Q_OBJECT in each and every QObject subclass.
> And why can I cast a VideoPlayer to a PlayerBase but not in the other
> direction?
What do you mean? You can always cast "for free" to a base*, but you need an
explicit cast to go towards a derived class.
--
Giuseppe D'Angelo
*unless you're inheriting from it multiple times and stuff like this
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