General and Desktop

Hi, Do you mean link to these libraries in your project ?

Ok. I I made it work after making QThread object a member and moving each QFutureWatcher object to it. I guess something wrong was in creating watcher in thread of QtConcurrent::run and when one call of recurse with QtConcurrent::run is finished, all watchers created in it, even dynamically and without a parent, were lost, or their connections were lost. I don't understand why it is so but it works. If someone can explain me this situation and why it works this way, i would be very thankful for explainations, so i would use CONNECT mechanism right in future.

@Princein said in how copy the file which in my project directory to the .exe file directory in windows: replace slashes in destination path for Windows win32:dir ~= s,/,,g Could it be because you need two backslashes before the 'g' ? Edit: and dont forget to re-run qmake whenever changing the file.

I got it. The solution was to force a Qt::QueuedConnection in the connect call for the ::stateChanged signal. Since the replica and Client-model objects live in the same thread, with Qt::AutoConnection a direct connection is established. However, that skips returning to the main event loop in between the calls. When I instead called waitForSource(), an internal event loop in that function is created. Even though the state of the replica object is designated as being valid when the slot is called, it is necessary to call an event loop at some point for the replica state to really become working. I consider this a bug in Qt Remote Objects or at least a missing important point in the docs for the replica object.

Qtopcua Build process has changed, now Open62541 is included - see Building Qt OPC UA with open62541

Hi, @Mogli123 Thank you very much for the info

@Qt-Enthusiast said in how to pack a completely a widget in a cell of a QTableWidget: Is it possible to remove the space and pack the text + completely in the cell What do you mean? What should happen with the extra space if the cell is wider than the content of your widget?

Hi As far as i know, PS output is no longer directly available in Qt5.

It can be done with QScreenRayCaster: /* * You have to add the ray caster to the root entity as a component * Perform ray casting tests by specifying "touch" coordinates in screen space */ m_screenRayCaster = new Qt3DRender::QScreenRayCaster(m_rootEntity); m_screenRayCaster->setRunMode(Qt3DRender::QAbstractRayCaster::SingleShot); m_rootEntity->addComponent(m_screenRayCaster); /* * Handle ray casting results, e.g. by touch events */ QObject::connect(m_screenRayCaster, &Qt3DRender::QScreenRayCaster::hitsChanged, this, &MyClass::handleScreenRayCasterHits); Triggering QScreenRayCaster by touch events: void MyClass::HandleTouchEvent(QTouchEvent *event) { switch (event->type()) { case QEvent::TouchBegin: break; case QEvent::TouchEnd: if (event->touchPoints().count() == 1) { QPointF point = event->touchPoints().at(0).pos(); m_screenRayCaster->trigger(QPoint(static_cast<int>(point.x()), static_cast<int>(point.y()))); } break; default: break; } } Handling ray casting results in a slot: void MyClass::handleScreenRayCasterHits(const Qt3DRender::QAbstractRayCaster::Hits hits) { for (int i = 0; i < hits.length(); ++i) { qDebug() << __func__ << "Hit Type: " << hits.at(i).type(); } }

@Gmoney just add image to ur .qrc file in qt . and then right click on the image copy full path . then u get the correct path paste that to ur code .it works

@Andaharoo try it with mouseEvent->button() instead of buttons(), button() willö give you the button that caused the event, whereas buttons Returns the button state when the event was generated. The button state is a combination of Qt::LeftButton, Qt::RightButton, Qt::MidButton using the OR operator. For mouse move events, this is all buttons that are pressed down. For mouse press and double click events this includes the button that caused the event. For mouse release events this excludes the button that caused the event. Pay attention to the last part For mouse release events this excludes the button that caused the event. You're filtering only for Release event -> you'll have to use button() function

@xXiXx if I see it correctly, your MyButton class is missing the Q_OBJECT macro. That is needed for signals&slots.

@Ovidiu_GCO As alternative you could use several list widgets: On the left is a list of drivers To the right side of the first list you have a second one: when you select a driver you put the cars of that driver into this list More lists if needed...

@psigil Hi Using an UI file is 100% the same as using plain code. The UI files is converted to C++ code which is run in setupUI() function so after that function you can just change it with setTabOrder all you wish.

@ConfusedProgrammer Hi That is good to hear. Overall, it should work much better for a map annotation or what your app does, than using PushButtons.

Hi, Do you have something like shown here in mind ?

Thank You very much for Your advise. I'll remeber it. This is very helpful.

In that case start by reading the Signals & Slots chapter in Qt's documentation. And the QThread documentation.