Hi I used the new (your) signals with QVector and rewrote the audiosignal.cpp (commited to svn)
regards marco Am 24.11.2010 um 11:10 schrieb Simon Eugster: > Well, the ?old? signal (using volume) _does_ work, but I cannot explain why. > When I try to do the same with my new signal, it does not work. > > Simon > > 2010/11/24 Marco Gittler <marco at gitma.de>: >> Hi >> >> I'll change this, to get it working (first on the "old" audiosignal) >> You can use this then for your audiospectrum. >> >> >> regards marco >> >> Am 24.11.2010 um 09:42 schrieb Simon Eugster: >> >>> Good Morning, >>> >>> I'm battling around with Qt's signals and slots. In r5116, >>> mainwindow.cpp:296 I want to connect my audiospectrum object to >>> Render::audioSamplesSignal. But whatever I do, my method never >>> receives the signal, although connecting works according to the return >>> value, Q_ASSERT etc. >>> >>> On line 298 I tried to find a reason for it and used the audio volume >>> signal. It is defined as: >>> void showAudioSignal(const QByteArray); >>> According to the Qt documentation and some people in #qt, Qt uses >>> normalizedSignature[1] for signal/slot connections. Meaning that I >>> should be able to just use >>> SIGNAL(showAudioSignal(QByteArray)) >>> to connect the signal. But then connecting fails, telling me that >>> there is no such signal. >>> >>> I do not get an error though when using >>> SIGNAL(showAudioSignal(const QByteArray) >>> i.e. the connection is set up correctly. Nevertheless the connected >>> slot is never called. Only if I use >>> SIGNAL(showAudioSignal(const QByteArray&) >>> connecting works AND the slot gets called. Although the & is not in >>> showAudioSignal's signature. >>> >>> So I tried to use the & for my signal (audioSamplesSignal) as well: >>> audioSamplesSignal(const QVector<int16_t>&,int,int,int) >>> with >>> void audioSamplesSignal(const QVector<int16_t>,int,int,int) >>> but this fails with ?no such signal?. Why should I have to add a & for >>> a QByteArray, but I'm forbidden to do so for the QVector? >>> >>> I then tried to change everything (including the signal's signature) >>> to const type& (whether making sense or not ? what I noticed above >>> does not make sense to me anyway). But still, no signal received. >>> >>> Can anyone help me? Why is qt behaving that way? What is the problem? >>> >>> thanks >>> Simon >>> >>> [1] http://doc.qt.nokia.com/4.7/qmetaobject.html#normalizedSignature >>> >>> ------------------------------------------------------------------------------ >>> Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! >>> Tap into the largest installed PC base & get more eyes on your game by >>> optimizing for Intel(R) Graphics Technology. Get started today with the >>> Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. >>> http://p.sf.net/sfu/intelisp-dev2dev >>> _______________________________________________ >>> Kdenlive-devel mailing list >>> Kdenlive-devel at lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/kdenlive-devel >> >> >> ------------------------------------------------------------------------------ >> Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! >> Tap into the largest installed PC base & get more eyes on your game by >> optimizing for Intel(R) Graphics Technology. Get started today with the >> Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. >> http://p.sf.net/sfu/intelisp-dev2dev >> _______________________________________________ >> Kdenlive-devel mailing list >> Kdenlive-devel at lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/kdenlive-devel >> >> > > ------------------------------------------------------------------------------ > Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! > Tap into the largest installed PC base & get more eyes on your game by > optimizing for Intel(R) Graphics Technology. Get started today with the > Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. > http://p.sf.net/sfu/intelisp-dev2dev > _______________________________________________ > Kdenlive-devel mailing list > Kdenlive-devel at lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/kdenlive-devel -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 3910 bytes Desc: not available URL: <http://mail.kde.org/pipermail/kdenlive/attachments/20101124/57692673/attachment.p7s>