I have a QWebView that opens a local web page on my computer, and everything works perfectly in Qt4.8. (It also works with a browser). But after porting the software to Qt5.0.2 (and making the change from QWebView to QtWebKitWidgets/QWebView, the program appears to hang, then crashes with the following output: Worker thread stops processing events during infinite loop ... I've created a Worker object in Qt to process video input indefinitely, and then move it into a QThread to keep the UI thread going. The problem is, I designed it such that the video capture function runs in an infinite loop until interrupted by a flag, and the flag was supposed to be set by a slot in the Worker object, but since the Worker object is inside the infinite loop, it never ... Signals and slots between objects in different threads in Qt Signals and slots between objects in different threads in Qt. Ask Question 0. ... I understand of your messages that I must change myprocess method because with this infinite loop the system can't process the events loop. Correct? I read the Qt documentation, but sometimes I don't know how to do it. ... Qt: Signal/Slot not working after QObject ... Signal and Slot Two Threads | Qt Forum I have a Problem. I am using 2 Threads, so that my GUI cannot lock up. I start both threads and htop is showing me two threads. For now, I force my working thread to enter an infinite loop once a slot is triggered. In my GUI Thread I emit the correspondin...
Signal Slot problem in a thread [EDIT-UPDATE] | Qt Forum
Event loops and signal-slot processing when using… Signals and slots are not the same as events and event handlers in Qt terminology. But slots are handled by event loops somewhat similarily.The largest problem in your code is usleep and infinite loops. You should almost never use those when working with Qt. I understand that a sleep in Worker... Сигналы и слоты в Qt: установка, особенности работы,… Qt сигналы и слоты помогают включить ориентированную на событие функцию в графические пользовательские интерфейсы приложений.Так как многие классы инфраструктуры предоставляют к ним различный доступ к предопределенным Qt сигналам и слотам.
Qt in Education The Qt object model and the signal slot ...
Сигналы и слоты. Сигналы и слоты являются одним из фундаментальных механизмов в Qt. Он позволяет наладить обмен информацией между объектами, которые ничего не знают друг о друге.Макросы SIGNAL() и SLOT() по сути преобразуют свои аргументы в строки. 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... qt-signals сигналы - C++Qt сигнал и слот не срабатывают Способ подключения сигнала и слота Qt работает во время работы, заключается в том, что он будет подключать только сигнал и слот, если они имеют одинаковые подписи. Если они не соответствуют точно, никакого соединения. поэтому в MainWidget.h.
QThread loop and QTimer | Qt Forum
Qt 4.3: Signals and Slots 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. Displaying data in QTable Widget using Infinite loop | Qt ... If you get a signal for each packet (e.g. by the QNetwork* classes), then you could just forget about the loop. Just connect some handler to the signal, and have it update the QTableWidget whenever it gets the signal. The "infinite looping" is then handled by the event loop inside QApplication.
Qt in Education The Qt object model and the signal slot concept
An overview of Qt’s signals and slots inter-object communication mechanism. Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt and probably the part that differs most from the features provided by other frameworks.
QWebView works in QT4.8, Appears to hang or infinite loop ... I have a QWebView that opens a local web page on my computer, and everything works perfectly in Qt4.8. (It also works with a browser). But after porting the software to Qt5.0.2 (and making the change from QWebView to QtWebKitWidgets/QWebView, the program appears to hang, then crashes with the following output: Worker thread stops processing events during infinite loop ... I've created a Worker object in Qt to process video input indefinitely, and then move it into a QThread to keep the UI thread going. The problem is, I designed it such that the video capture function runs in an infinite loop until interrupted by a flag, and the flag was supposed to be set by a slot in the Worker object, but since the Worker object is inside the infinite loop, it never ... Signals and slots between objects in different threads in Qt