Hey Marco, Thanks! Working here. Why is the & required? Did you just use trial&error, or is there a rule that makes sense?
Simon 2010/11/24 Marco Gittler <ma...@gitma.de>: > 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 <ma...@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@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@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@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@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@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kdenlive-devel
