General and Desktop

[quote author="AcerExtensa" date="1329207608"]@test.waitForFinished(); qDebug() << "gelen :"<<test.readAllStandardOutput ();@ or use singal/slots: @void error ( QProcess::ProcessError error ) void finished ( int exitCode, QProcess::ExitStatus exitStatus ) void readyReadStandardError () void readyReadStandardOutput () void started () void stateChanged ( QProcess::ProcessState newState )@[/quote] i've solved it thanks =) appearantly i have to put the "waitForFinished()" method.

You cannot rely on the fact that headerData is only called once. If you have pagination, I would add an attribute to the model, holding the current start index (= offset from the start) of the result set (as passed to limit/offset in the query) and in headerData just add that offset to the section number. This way your return value is always the same.

Thx, big thx for advise))) !!!

Please, mark your thread as SOLVED in the name of thread.

I think you need use something like OpenGL. Cause you need to handle all operations with your videocard.

thanx batosai i will try that...

It is a 16bit unsigned int IIRC, so no.

thank you very much!!

I pointed you to the documentation that allows you to get back the headers, and then you can call setVisible on them.

Yes. But I can't override the paintEvent of each child widget, because they were created in Designer (with UI). So maximum I can do - is try to install eventFilter on every widget like this: @MyWidget::MyWIdget(QWidget parent) : QWidget(parent) { QList<QWidget > widgets = findChildren<QWidget>(); foreach(QWidget widget, widgets) { widget->installEventFilter(this); } } MyWidget::eventFilter(QObject* object, QEvent* event) { if(event->type() == QEvent::Paint) { QPaintEvent* paintEvent = static_cast<QPaintEvent*>(event); if(_rowCount == 0) paintEmptyWidget(widget, /// Function like I describe above paintEvent->rect(), "Emty text", "Note text"); return true; } return QWidget::eventFilter(object,event); } @ But it doesn't work as I need. [quote author="shoyeb" date="1329193466"]then u need to override the paint event of each child widget... i am not sure that this will work but atleast u can try..[/quote]

"case 4" does not have a statement. You must add a regular statement/return statement or just break.

QGraphicsScene::selectionChanged is the signal you might be looking for.

operator<< of QDBusMessage takes a QVariant as argument. There's no implicit conversion between an array of uchar and QVariant, that's why the compiler bails out. You will have to create a QVariant with the contents of your array.

@QImage image(800, 600, QImage::Format_ARGB32); QPainter painter(&image); // make a dark qimage for(int i=1;i<800;i++){ for(int j=1;j<600;j++){ painter.setPen(QColor(0, 0, 0)); painter.drawPoint(i,j); } } scene->addPixmap(QPixmap::fromImage(image)); view->setScene(scene); layout->addWidget(view); w.setLayout(layout); w.show(); for(int i=1;i<8000;i++){ for(int j=1;j<600;j++){ painter.setPen(QColor(i%5, i%5, j%5)); painter.drawPoint(i,j); } } scene->addPixmap(QPixmap::fromImage(image)); view->setScene(scene);@ it takes some time to draw the form but i want to see the result after each iteration. is it possible?

I went through couple of demo calculator apps and all of them seem to have a single line edit handling all the operations. In addition to that, the line edit seems divided in half since while the different operations take place you can merely see the result at a specific time, unless you hit the "=" key which somehow terminates the calculations and displays the final result. Similar to Windows default calculator... Can someone please explain how can I possibly add that to my calculator app as well? Thank you in advance.

I need to solve similar issue, some one know how to check is multicast group exists?

[quote author="Ashish Mittal" date="1329131286"]Thanks a lot Volker!!!!, I am able to solve the problem by moving my entire code from custom thread class to a class derived from Qobject and I simply called MoveToThread() on this object. [/quote] Correct. That's the way QThread is supposed to use now.