Slot on main thread not called when signal is emitted from ... Slot on main thread not called when signal is emitted from another thread Slot on main thread not called when signal is emitted from another thread. This topic has been deleted. Only users with topic management privileges can see it. ... You are doing the signal and slot across thread. Signal is sent from MyThread and Slot is main thread. 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 for Python 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.
'''Warning:''' Take care of not calling any function that can raise an assertion ... This would be the ideal solution, but not all classes could be mapped 1:1 and ... QObject members or simple functions (thanks to Qt5 new signal slot syntax) ... ''' wxQtSignalHandler< wxWindow >:''' allows emitting wx events for Qt events & signals.
Yes it means nothing wrong inside Qt/the setup. ScriptEngine in my case is a singleton meaning its static ? But I agree if other signals can get be emitted (from same nesting level) then it seems unlikely its that. Navigation. Qt Forum. Login; ... Have you checked you can emit a signal and have a slot called in the class ? c++ - Using emit vs calling a signal as if it's a regular ... Using emit vs calling a signal as if it's a regular function in Qt. Ask Question 88. 10. ... (a signal). You dial 911 (connect the fire signal with the 911 response slot). The signal was only emitted, whereas the slot was implemented by the fire department. May be imprecise, but you get the idea. ... If it is possible to use/call a signal ... What do I do if a slot is not invoked? - KDAB
QTcpServer newConnection slot not being called | Qt Forum
QtCore.QObject.connect(widget, QtCore.SIGNAL(‘signalname’), slot_function) A more convenient way to call a slot_function, when a signal is emitted by a widget is as follows − widget.signal.connect(slot_function) Suppose if a function is to be called when a button is clicked. Here, the clicked signal is to be connected to a callable function. Qt in Education The Qt object model and the signal slot concept A signal always returns void A signal must not be implemented The moc provides an implementation A signal can be connected to any number of slots Usually results in a direct call, but can be passed as events between threads, or even over sockets (using 3 rd party classes) The slots are activated in arbitrary order A signal is emitted using the ... Slot on main thread not called when signal is emitted from ... Slot on main thread not called when signal is emitted from another thread Paul Offord (Dec 15) Re: Slot on main thread not called when signal is emitted from another thread Gerald Combs (Dec 15) Re: Slot on main thread not called when signal is emitted from another thread Paul Offord (Dec 16) [QTBUG-59754] QLowEnergyController::connected not emitted on ... Using the QT Bluetooth BLE support in peripheral mode, I connect the QLowEnergyController::connected SIGNAL to a SLOT. Upon connecting to the peripheral, the connect SIGNAL is not emitted. However the disconnected SIGNAL is emitted upon disconnection of the connected device.
Qt 4.3: Signals and Slots
Slot on main thread not called when signal is emitted from ... You are doing the signal and slot across thread. Signal is sent from MyThread and Slot is main thread. ... Slot on main thread not called when signal is emitted from another thread Slot on main thread not called when signal is emitted from another thread. This topic has been deleted. Only users with topic management privileges can see it. c++ - Qt 4.8 Signals/Slots not called after moveToThread ... Qt 4.8 Signals/Slots not called after moveToThread() ... slot and wait for a call to the slot Uploader::finishWhenQueueIsEmpty() to finish its execution, through some synchronization mechanism ... There is not such signal or slot in the posted UploadWorker class. What am I missing? – TheDarkKnight Aug 12 '14 at 14:33. 1. Signals & Slots | Qt 4.8
Signals are not emitted if QAxControl is - Qt Bug Tracker
QTcpServer newConnection slot not being called | Qt Forum If I specified DirectConnection, the slot was called but of course it was called in the context of the thread running my TCP server and not the main thread. Whatever way I choose, I need to get a slot function to run in the context of the main thread which I understand means it must be serviced by an Event Loop in the main thread. Qt 4.3: Signals and Slots 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 to identify which signal called the slot? | Qt Forum The only way is to pass that info as a signal/slot parameter. It goes against the design of signals/slots to do so though. Receiver should not have to know anything about the sender, and, in particular, there might not be a sender at all if the slot was called directly. Signals are not emitted if QAxControl is ... - Qt Bug Tracker
These slots will be called whenever the specified signal is emitted by any object of the class. ... A slot does not know if it has any signal(s) connected to it. ... public methods to access the state, but in addition it has support for component programming using signals. ... The class which corresponds to Qt's QObject is TQObject. Qt 4.8: Signals & Slots A slot is a function that is called in response to a particular signal. ... Then b emits the same valueChanged() signal, but since no slot has been connected to b's ... Getting the most of signal/slot connections : Viking Software – Qt Experts