Top "Signals-slots" questions

Signals and slots is a mechanism for implementing the observer pattern.

QThread: Destroyed while thread is still running?

I would like to start my QThread when I push on button Run. But the compiler outputs following error: QThread: …

c++ qt signals-slots qthread qwt
How can I emit a signal from another class?

I have a problem with my Qt application. I'm trying to emit a signal from within another class (it is …

c++ qt qt4 signals-slots
Qt: Signals and slots Error: undefined reference to `vtable for

Following example from this link: http://developer.kde.org/documentation/books/kde-2.0-development/ch03lev1sec3.html #include <QObject&…

qt signals-slots vtable undefined-reference
PyQt Widget connect() and disconnect()

Depending on a conditions I would like to connect/re-connect a button to a different function. Let's say I have …

python pyqt click signals-slots disconnect
PyQt5: How can I connect a QPushButton to a slot?

Okay, so pretty much every tutorial/understandable-written-in-human-language-documentation is for PyQt4. But, PyQt5 changed how the whole 'connect button to a …

python qt signals-slots pyqt5
How to disconnect a signal with a slot temporarily in Qt?

I connect a slot with a signal. But now I want to disconnect them temporarily. Here is part of my …

qt signals-slots
Does Qt support virtual pure slots?

My GUI project in Qt has a lot of "configuration pages" classes which all inherit directly from QWidget. Recently, I …

c++ qt inheritance signals-slots
Determine signals connected to a given slot in Qt

I've injected myself into a Qt application, and I'm attempting to figure out what signals a given slot is connected …

qt signals-slots
How to connect the signal valueChanged from QLineEdit to a custom slot in Qt

I need to connect the valueChanged signal from QLineEdit to a custom slot programatically. I know how to do the …

c++ qt signals-slots qlineedit
qt signal undefined reference error

I have a class server for which I have created a signal joined(QString name). I call it in a …

c++ qt signals-slots qt-signals