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
