emit aSignal(); } }; /* ... */ Thread thread; Object obj; QObject::connect(&thread, SIGNAL(aSignal()), &obj, SLOT(aSlot())); thread.start(); 如上述代码,信号aSignal() 将在一个新的线程里被发射(由线程对象所代表);因为它并不是Object 对象驻足的线程,所以尽管Thread对象thread与Object...
Qt - Emit signal from callback Ask Question Asked7 years, 7 months ago Modified6 years, 9 months ago Viewed4k times I am using theBGLibin myQtapplication to communicate over BLE. In the main thread the GUI is running (sensornode_gui.cpp). By clicking on a pushButton a different ...
...voidemitBunchOfSignals(){emitsignal1();emitsignal2(); ... } ... } the "run" method of my pthread which has a pointer to a MyObject instance (instance that was created within the main Qt GUI thread context NOT the pthread) calls theemitBunchOfSignals()methods. Be...
data->eventDispatcher.load()->startingUp(); else createEventDispatcher(data); ...//省略 emit thr->started(QThread::QPrivateSignal()); // 发射线程启动信号 QThread::setTerminationEnabled(true); thr->run(); // 调用QThread::run()函数 -- 线程函数 finish(arg); //结束线程 return 0; } ...
Qt对线程的支持已经有很多年了(发布于2000年九月22日的Qt2.2引入了QThread类),Qt 4.0版本的release则对其所有所支持平台默认地是对多线程支持的。(当然你也可以关掉对线程的支持,参见这里)。现在Qt提供了不少类用于处理线程,让你我们首先预览一下:
emit valueChanged(v); } } 这段程序表明当setValue执行时它将释放出valueChanged这个信号。 以下程序示范了不同对象间信号与反应槽的连接。 Demo a, b; connect(&a, SIGNAL(valueChanged(int)), &b, SLOT(setValue(int))); b.setValue(11); ...
当QObject接收队列信号(queued signal)或者传来的事件(posted event),槽函数或事件处理器将在对象所处的线程中执行。 根据以上的原理,Qt使用计时器的线程关系(thread affinity)来决定由哪个线程发出timeout()信号。正因如此,你必须在它所处的线程中start或stop该定时器,在其它线程中启动定时器是不可能的。
一:继承QThread方式创建线程 新建一个类 WorkThread,基类为QThread. 重写WorkThread的虚函数 void run(),然后调用函数WorkThread::start()后,则开启一条线程,自动运行函数run() 当停止线程时,添加一个bool变量,通过主线程修改这个bool变量来进行终止,但是需要对这个bool变量进行加锁处理(亲测, 主线程中调用wait(...
this -> m_thread = new QThread(); this -> m_worker = new MyWorker(); this -> m_worker-> moveToThread(this -> m_thread); connect(m_thread, SIGNAL(started()), m_worker, SLOT(doWork())); connect(m_worker, SIGNAL(finished()), m_thread, SLOT(quit())); this -> m_thread...
void QMetaObject::activate(QObject *sender, int from_signal_index, int to_signal_index, void **argv) { // [... other code ...] // emit signals in the following order: from_signal_index // <= signals <= to_signal_index, signal < 0 for (int signal = from_signal_index; (signa...