Top "Qt-signals" questions

Signals and slots are used for communication between objects.

How to emit cross-thread signal in Qt?

Qt documentation states that signals and slots can be direct, queued and auto. It also stated that if object that …

c++ qt signals-slots qt-signals
Qt signals (QueuedConnection and DirectConnection)

I'm having trouble with Qt signals. I don't understand how DirectConnection and QueuedConnection works? I'd be thankful if someone will …

c++ qt qthread qt-signals
How delete and deleteLater works with regards to signals and slots in Qt?

There is an object of class QNetworkReply. There is a slot (in some other object) connected to its finished() signal. …

qt qt-signals slot
private/public qt signals

Can Qt signals be public or private? Can I create internal signals, which are seen only inside the class? Update: …

qt qt-signals
QObject connection function

I checked other similar questions and tried their solutions but they don't work for me. I'm basically trying to make …

c++ qt qt5 qt-signals
No matching function for QObject::connect

I'm writing a program that send an UDP frame every 10 mS. Here's how my program is supposed to work : I've …

c++ qt qtcore qobject qt-signals
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
Declare abstract signal in interface class

How to declare a Qt signal in an abstract class / interface when the implementing class is already derrived from QObject/…

c++ qt qt-signals
PyQt5 Signals and Slots 'QObject has no attribute' error

I have been trying to find a way to update the GUI thread from a Python thread outside of main. …

user-interface pyqt qt-signals pyqt5
How to use SIGNAL and SLOT without deriving from QObject?

OR other way to formulate my question (though it didn't solve my problem): 'QObject::QObject' cannot access private member declared …

c++ qt qt-signals qobject slot