Qt signal slot get sender

I STRONGLY NEED to know slot where signal is connected to.

Signals & Slots | Qt 4.8 Signals and Slots. In Qt, we have an alternative to the callback technique: We use signals and slots. A signal is emitted when a particular event occurs. Qt's widgets have many predefined signals, but we can always subclass widgets to add our own signals to them. A slot is a function that is called in response to a particular signal. 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. Signals & Slots | Qt Core 5.10 Signals and Slots. In Qt, we have an alternative to the callback technique: We use signals and slots. A signal is emitted when a particular event occurs. Qt's widgets have many predefined signals, but we can always subclass widgets to add our own signals to them. A slot is a function that is called in response to a particular signal.

1] Signal and Slot Example in PyQt5 - Manash’s blog

QRunnable is destroyed by QThreadPool after it finishes. When I emit a signal from it and try to get the QRunnable object from slot using sender() it's NULL. Minimal example: // class MyRunnable : c++ - Qt: Signal main thread - Stack Overflow I can emit from this thread, but only if I connect the slot using Qt::DirectConnection. The upshot is that QObject::sender() in the SLOT will always return NULL. I wish to call deleteLater() for instance, but that can only be scheduled in a QThread. I think I need to get back to the main thread, but how can I signal the object on the main thread?

What do I do if a slot is not invoked? - KDAB

Signals and Slots. In Qt, we have an alternative to the callback technique: We use signals and slots. A signal is emitted when a particular event occurs. Qt's widgets have many predefined signals, but we can always subclass widgets to add our own signals to them. A slot is a function that is called in response to a particular signal. QObject Class | Qt Core 5.12.3 Detailed Description. The QObject class is the base class of all Qt objects.. QObject is the heart of the Qt Object Model.The central feature in this model is a very powerful mechanism for seamless object communication called signals and slots.

Qt has had thread support for many years (Qt 2.2, released on 22 Sept 2000, introduced the QThread class.), and with the 4.0 release thread support is enabled by default on all supported platforms (although it can be turned off, see here for more details). Qt now offers several classes for dealing with threads; let's start with an overview. QThread

qt4 - How to get sender widget with a signal/slot... -… It's possible to bind more than one signal to one slot (isn't?). So, is there a way to understand which widget sends the signal? I'm looking for something like sender argument of events in .NET … [SOLVED] How to get emitter of a signal in the slot? | … I need to connect their editingFinished() signal to a shared slot, but they have to be distinguished inside the slot. I guess it's impossible to get emitter of a signal in Qt, but writing five clue[quote author="Anticross" date="1325161551"]QObject::sender() will return you a pointer to signal sender... Сигналы и слоты в Qt / Хабр Механизм сигналов и слотов главная особенность Qt и вероятно та часть, которая отличаетcя от особенностей, предоставляемых другими фреймворками.В Qt используется другая техника — сигналы и слоты. Сигнал вырабатывается когда происходит определенное событие.

QObject Class | Qt Core 5.12.3

Qt 4.8: Signals & Slots Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt and probably the part thatA slot is a receiving function used to get information about state changes in other widgets. LcdNumber uses it, as the code above indicates, to set the... Как соединить сигнал с "неизвестными" аргументами со … connect(sender, signal, this, &phpslot); как правильно создать связь сигнал-слот для такого случая? =) P.s. Еще была идея просто получить список переданных аргументов из сигнала, и вызвать нужный слот с этими аргументами, но я не нагуглил как можно такое провернуть. Особенности Qt: слоты и сигналы, описание QObject... Вводная часть: Qt – это не только элементы графического интерфейса. Этот фреймворк представляет собой взаимосвязанную систему. Родственность Qt-объектов осуществляется через наследование класса... New Signal Slot Syntax/ru - Qt Wiki