qt-signals

After reading some articles like this about Qt Signal-Slot communications I still have a question concerning the queued connection. If I have some threads sending signals all the time to each other and lets say one thread_slow is running a slow method in it's event loop and another thread_fast is running a fast one that sends multiple signals while the other thread is still running it's slow method.....when the slow method from thread_slow returns to the event loop, will it process all the signals that were sent before by thread_fast or just the last one (all the signals are the same type)? If

I'm having trouble with Qt signals. I don't understand how DirectConnection and QueuedConnection works? I'd be thankful if someone will explain when to use which of these (sample code would be appreciated). You won't see much of a difference unless you're working with objects having different thread affinities. Let's say you have QObjects A and B and they're both attached to different threads. A has a signal called somethingChanged() and B has a slot called handleChange() . If you use a direct connection connect( A, SIGNAL(somethingChanged()), B, SLOT(handleChange()), Qt::DirectConnection );

I am having difficulty in my Qt program with connecting button signals to my slots. My code is: Main.cpp #include <QtGui/QApplication> #include "MainWidget.h" int main(int argc, char *argv[]) { QApplication app(argc, argv); MainWidget mainWidget; mainWidget.show(); return app.exec(); } MainWidget.h #ifndef MAINWIDGET_H #define MAINWIDGET_H #include <QWidget> class MainWidget : public QWidget { public: MainWidget(); public slots: void bAdvice_clicked(); void bWeather_clicked(); void bNextMeeting_clicked(); void bQuit_clicked(); }; #endif // MAINWIDGET_H MainWidget.cpp #include "MainWidget.h"

Qt documentation states that signals and slots can be direct , queued and auto . It also stated that if object that owns slot 'lives' in a thread different from object that owns signal, emitting such signal will be like posting message - signal emit will return instantly and slot method will be called in target thread's event loop. Unfortunately, documentation do not specify that 'lives' stands for and no examples is available. I have tried the following code: main.h: class CThread1 : public QThread { Q_OBJECT public: void run( void ) { msleep( 200 ); std::cout << "thread 1 started" << std:

I have got a loop. I created a QCheckBox and put it in a QTableWidget cell, and everything is Ok. In each step of loop I have called a connect function, for myslot SLOT, but only the last QCheckBox instance is applied. I googled a lot and have found many people have my problem. I have applied their solutions, but my problem remains. for row in xrange(len(uniqueFields)): instance = QtGui.QCheckBox(uniqueFields[row], findInstance.tableWidget) print QtCore.QObject.connect(instance, QtCore.SIGNAL(_fromUtf8("stateChanged (int)")), lambda: findInstance.projectsInstance.myslot( "TWCH", findInstance,