creating signals with button slots

shravan_121

I have a Button : Button *plus = createButton(tr("+"), SLOT(additiveOperatorClicked())); in which the additiveoperatorclicked is a function I have to create signal slot connection can it be made.

Chris Kawa

Yes, but you'll need to add a pointer to the object that has the slot as additional parameter to the createButton function, because that's needed for the connect call.

shravan_121

@Chris-Kawa can you please explain me how to do that because i am in the learning phase.

shravan_121

can you please explain me how to do that because i am in the learning phase.

Pl45m4

@shravan_121

If you want to connect your plus button to your additiveOperatorClicked function:

connect(plus, SIGNAL(clicked()), this, SLOT(additiveOperatorClicked()));

Chris Kawa

@shravan_121 Well, assuming your Button class has a clicked() signal you can do something like this:

Button* createButton(const QString& text, QObject* obj, const char* slot)
{
    Button* button = new Button(text);
    QObject::connect(button, SIGNAL(clicked()), obj, slot);
    return button;
}

and assuming you have some_object that has a additiveOperatorClicked() slot you can use it like this:

Button* plus = createButton("+", some_object, SLOT(additiveOperatorClicked()));