QObject signal/slot not working

[Msnforum]

I have a class A that inherits QWidget and class B that inherits QObject.

When a button is clicked, class A creates an object of Class B. Class B is supposed to perform a http request and emit a done signal to perform the slot function.

The problem is that class B can initialize properly but it cannot execute the slot function when the done signal is emitted. As far as I know, I don't see debug errors and my actual code is a bit too long.

Example:

class A : public QWidget
{
    Q_OBJECT
    public:
        A();
    private slots;
        void buttonClicked();
    private:
        QPushButton *button;
};

class A : public QWidget
{
    Q_OBJECT
    public:
        A();
    private slots;
        void buttonClicked();
    private:
        QPushButton *button;
};

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class B : public QObject
{
     Q_OBJECT
     public:
         B();
     private slots;
         void performFunction();
};

class B : public QObject
{
     Q_OBJECT
     public:
         B();
     private slots;
         void performFunction();
};

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A::A()
{
     ...
     connect(button,SIGNAL(clicked()),this,SLOT(buttonClicked()));
 
void A::buttonClicked()
{
   B objectB;
}

A::A()
{
     ...
     connect(button,SIGNAL(clicked()),this,SLOT(buttonClicked()));

void A::buttonClicked()
{
   B objectB;
}

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B::B()
{
     ...
     connect(http,SIGNAL(done(bool)),this,SLOT(performFunction()));
}

B::B()
{
     ...
     connect(http,SIGNAL(done(bool)),this,SLOT(performFunction()));
}

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Could anyone point out what I have done wrong.

[boudie]

Wild guess...
Does the http object already exist when this is executed:
connect(http,SIGNAL(done(bool)),this,SLOT(performF unction()));

[Msnforum]

Yes, I have created the object.

QHttp *http = new QHttp(this);

QHttp *http = new QHttp(this);

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Oddly enough, when I try to create a class B object manually on the main function, the performFunction slot does execute normally.

[jpn]

void A::buttonClicked()
{
   B objectB;
}

void A::buttonClicked()
{
   B objectB;
}

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Notice that "objectB" goes out of scope according to normal C++ rules and gets destructed immediately after its constructor has been executed.

[Msnforum]

Thanks, got that out of the way and the function does execute now.

B *objectB;
objectB = new B;

B *objectB;
objectB = new B;

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I've got another question, how would i proceed if i want to change the text of the button in class A.

If I inherit QObject and class A to access the button, it says QObject is already a base class of class A.


Edit: Compile just fine after removing QObject from inheritance leaving behind single inheritance to class A. The QPushButton text doesn't refresh though. Am I doing it right?