@bibasmall
I'm not understanding what is going on with your const or not. The slot CommitData() must not be const. Is it??

Hmm, you mean you call it from CEditorDelegate::createEditor(), that is const, so its this is const, and you can't then use that for the slot object? Then I really don't know why it's OK for the connect() to actual slot but not to lambda (I suspect it's this issue, not because the new CommitData(QPushButton *btn) parameter....

Is your CommitData() const? Doesn't look like it. If you made it const does that allow the connect()?

UPDATE
I think this has crossed with your latest. I believe you show there you have found a way. I prefer the second one.

Basically you have raised a "gotcha": createEditor() is const, and that prevents you from connecting a slot to this inside it, which is something one might well want to do. It (apparently) works when &CEditorDelegate::CommitData is passed on its own as a standalone argument, but not if you try a lambda with this->CommitData(). If the C++ super-experts here see this they might comment....

@jsulm Thank you

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()));