Top "Qt-signals" questions

Signals and slots are used for communication between objects.

Qt 5 : update QProgressBar during QThread work via signal

I'm trying to update a QProgressDialog (owned by a QMainWindow class) along the execution of a QThread who process some …

c++ multithreading qt qt5 qt-signals
Difference between QObject::connect vs connect methods

I am a newbie with Qt. Most of the times Qt developers need to use signals and slots for object …

c++ qt qobject qtcore qt-signals
Q_ENUMS are "undefined" in QML?

Enums are not working out for me. I have registered them with Q_ENUMS() I did not forget the Q_…

c++ qt qml qtquick2 qt-signals
How to Compress Slot Calls When Using Queued Connection in Qt?

After reading some articles like this about Qt Signal-Slot communications I still have a question concerning the queued connection. If …

c++ qt qthread qtcore qt-signals
Passing extra arguments through connect

Is it possible to pass variables through slots so I can print out certain text? Trying to pass variable 'DiffP' …

python python-3.x pyqt pyqt5 qt-signals
How to detect Windows shutdown or logoff in Qt

I am porting a Linux app to Windows written in Qt. The application needs to save some settings before closing. …

c++ windows qt qt-signals qtcore
Using Qt signals and slots with multiple inheritance

I have a class (MyClass) that inherits most of its functionality from a Qt built-in object (QGraphicsTextItem). QGraphicsTextItem inherits indirectly …

c++ qt multiple-inheritance qt-signals
PyQt - get list of all checked in QTreeWidget

I am building a simple application to open up a folder of data and plot that data. Importing the data …

python pyqt qtreewidget qt-signals
Qt multiple inheritance and signals

I'm having a problem with QT regarding multiple enheritance because of QObject. I know that a lot of others have …

c++ qt multiple-inheritance qt-signals
Trouble in reading from Serial port using QSerialPort

I have to develop a C++ program for an embedded FriendlyARM-based processor system. I use Qt Creator 3.0.0 (based on Qt 5.2.0) …

qt qtcore qt-signals qtserialport qiodevice