99.9999% probability you are trying to use the object you just deleted. If you call deleteLater on an object you then have to recreate it (e.g. with new) before using it or trying to delete it again

Hi, What is that ??? Ui_MainWindow *form = new Ui_MainWindow(); try: connect(ui->startButton, SIGNAL (pressed()), SLOT (handleExecutionButton()));

For future reference, this approach only works if you know in advance all the roles you will use. You can use KSelectionProxyModel instead if you need a proper general implementation

Thank you @mrjj I will go ahead and mark this as solved then. I know my IP Editor isn't exactly elegant, but with the requirements I'm given and the restrictions, I've done the best I can.

You could use a QRubberBand to setup the line and once you release it add the QGraphicsLineItem to your scene.

Hi look at this sample http://www.java2s.com/Code/Cpp/Qt/Calculatorwithpushbuttons.htm Shows how to hook up buttons etc. (its numeric keypad) you can change it to use QApplication::focusWidget () const to input to whatever LineEdit that is selected.

@Jeroen3 Thanks for the reply. I tried using setCurrentIndex which helped me out . ui->tabWidget->setCurrentWidget(ui->tab);

@joeQ Thanks man.

AFAIK, you can't, however you can still re-use it by using something like: QString styleSheet("%1:checked {background-color: lightgreen; border: 1px solid;} " "%1 {background-color: red; border: 1px solid; padding: 6px}"); myWidget->setStyleSheet(styleSheet.arg(myWidget->metaObject()->className()));