MyClass::MyClass(QObject *parent) : QObject(parent) { // Connect the timer's timeout to our TimerHandlerFunction() connect(&m_timer, SIGNAL(timeout()), this, SLOT(TimerHandlerFunction())); } void MyClass::SomeMethod(int a) { m_a = a; // Store the value to pass later m_time...
FromQTimer'sman page: In multithreaded applications, you can use QTimer in any thread that has an event loop. To start an event loop from a non-GUI thread, use QThread::exec(). Qt uses the timer's thread affinity to determine which thread will emit the timeout() signal. Because of...
Introduction Someone ucancode.neted in the VC++ forum how they can add a status bar to a dialog and I foolishly replied saying that all they had to do was to ha... 查看原文 QTreeView和QStandardItemModel的简单使用 Dialog.h Dialog.cpp Qt——屏保小球 dialog.h: dialog.cpp: Qt——Q...
QTimer::singleShot(1000, QCoreApplication::instance(), SLOT(quit())); //if you need quit() only Also you can use Ctrl+C to exit. If user send Ctrl+C signal QCoreApplication_quit_example will use non-Qt function SigInt_Handler(). It tested on Ubuntu. QCoreApplication_quit_SIGINT_...
Instead, we need to use a timer. I got the workaround from the StackOverflow Q&A:def __init__(self): # Create a timer. self.timer = QTimer() self.timer.timeout.connect(self.nextFrameSlot) def nextFrameSlot(self): rval, frame = self.vc.read() frame = cv2.cvtColor(frame, cv2...
().To be able to use one of the QThreadPool threads, we have to subclass QRunnable and implement the run() method. After that, we have to create an instance of the QRunnable subclass and pass it to QThreadPool::start(). This is shown in the code snippet below. The figure explains...
from qgis.gui import QgsHighlight from PyQt4.QtCore import QTimer from PyQt4.QtGui import QColor timer = QTimer( iface.mapCanvas() ) lstHighlights = [] def flashFeatures( featureIds ): global lstHighlights for f in iface.activeLayer().getFeatures( QgsFeatureRequest().setFilterFids(feature...
Type 'o' if you want to use the Open Source Edition. Which edition of Qt do you want to use? Simply, type “o” (for Open Source Edition) and press Enter. After a few moments, you should be getting the following prompt: You are licensed to use this software under the terms of ...
Central -This is a device that is dual purpose and can scan for data as well as can connect to them When BLE was introduced, first two modes were utilized by sensors and other industrial equipment and last two were used by mobile phones computers. However, with the evolution of technology...
I often forget how to do this so I'm documenting it here for future reference. If I want to emit a signal and also pass an argument with that signal, I can use the formself.emit(SIGNAL("mySignalName"), myarg). I connect the signal to a method in the usual way. To use the ar...