Qt signal slot no matching function call connect

I'm trying to understand why QObject::connect sometimes does the job and why sometimes it does not. i would be really happy about anykind of help, i already did a lot of google/Documentation reading/ and looking for possible dublicates of the question, the duplicates cases did not solve my problem

[SOLVED]Can't connect signal to slot with QVector arguments | Qt... connect(protocolb, SIGNAL(RequestUpdatePlot(QVector, QVector)), plotb, SLOT(UpdatePlot(QVector, QVector))); I've tried looking up elsewhere on line how to connect signals to slots when there are arguments in the calls. I tried changing the connect call to the new style offered in Qt 5.4: Error: no matching function for call to 'QObject::connect | Qt... No the example shows what I suggested: create a separated widget that encapsulates the functionality of interest and use that one in the MainWindow. Signals & Slots | Qt 4.8 Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal. Qt's signals and slots mechanism ensures that if you connect a signal to a slot, the slot will be called with the signal's parameters at the right time. Signals and slots can take any number of arguments of any type. Signals & Slots | Qt Core 5.12.3

Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal. Qt's signals and slots mechanism ensures that if you connect a signal to a slot, the slot will be called with the signal's parameters at the right time. Signals and slots can take any number of arguments of any type.

How Qt Signals and Slots Work - Woboq signals, slots, Q_OBJECT, emit, SIGNAL, SLOT. Those are known as the Qt extension to C++. They are in fact simple macros, defined in qobjectdefs.h. #define signals public #define slots /* nothing */ That is right, signals and slots are simple functions: the compiler will handle them them like any other functions. QObject::connect is impossible with overloaded signal - Qt Kubuntu Linux 12.10 with Qt 5.0.1 from Qt Project Description It's impossible to invoke QObject::connect (new connection syntax) if the signal has more than one implementation.

The clicked() signal do not have a label and lineEdit as parameters so you cannot connect like thatEven if I delete the parameters label and lineEdit from the slot, its function implementation and inI forgot to subclass QObject! Now the program compiles but the slot is never called. here is how the...

Connect signal to signal | Qt Forum

nd the index of the signal and of the slot Keep in an internal map which signal is connected to what slots When emitting a signal, QMetaObject::activate is called. It calls qt metacall (generated by moc) with the slot index which call the actual slot

qt4 - Qt 4.5 - Is emitting signal a function call, or a ... I am not sure about the nature of the signal/slot mechanism in Qt 4.5. When a signal is emitted, is it a blocking function call or a thread? Say this emit GrabLatestData(); // proceed with latest... QT : CONNECT - C++ Forum in entrancePage() function i wanna show another page instead of writing a message in the console..but i have no idea how to do this.. should my classes inherit from QObject or QWidget?? should i create a new QMainWindow ?? i am using Qt designer for creating my pages.. Mapping Many Signals to One - Qt Documentation Qt allows us to connect multiple signals to the same signal or slot. This can be useful when we provide the user with many ways of performing the same operation. Sometimes, however, we would like the slot to behave slightly differently depending on which widget invoked it. New Signal Slot Syntax - Qt Wiki

@mandruk1331. First you make sure that both the source and destination objects are derived from QObject and as @ambershark said, add Q_OBJECT macro and in connect statement QObject:: is not required because you are already in QObject context only. If you go through all the above cases, it …

Checking all Qt signal/slot connection - dskims.com Checking the Qt signal slot connect calls at runtime is a worry for me. I should be possible to run a static check of the connect statements.I want to use a signals/slots library in a project that doesn't use QT. I have pretty basic requirements: Connect two functions with any number of parameters. Qt: Connecting signals to … signals – Dave Smith's Blog I found out today that Qt’s slots/signals architecture is even better than I thought. Normally, developers connect widget signals to widget slots to beThis may seem weird, but consider this scenario. You have a custom widget, called MyWidget, that has a signal, somethingClicked(), which is emitted... Automatic Connections: using Qt signals and slots the easy… One key and distinctive feature of Qt framework is the use of signals and slots to connect widgets and related actions. But as powerful the feature is, it may look compelling to a lot of developers not used to such a model... Ошибка компиляции no matching function for call to