Signal and Slot connection not working !!

[prakash437]

Dear All,
I am pretty new to Qt and I accept this could well be a dumb question.

I dont understand why the slot connection is not working here !!

I have a simple form, with a button, and a tree widget. I have created a custom class for the tree widget, as in here and promoted it in the Qt designer !!

class QFileBrowser : public QTreeWidget
{
..
public slots:
    void onFilesFoldersSelected();
};

class QFileBrowser : public QTreeWidget
{
..
public slots:
    void onFilesFoldersSelected();
};

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The main window has a signal defined as follows !!

signals:
    void filesFoldersSelected();

signals:
    void filesFoldersSelected();

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the signals and slot are connected as here !!

QObject::connect(this, SIGNAL(filesFoldersSelected()), ui->twFileBrowser, SLOT(onFilesFoldersSelected()));

QObject::connect(this, SIGNAL(filesFoldersSelected()), ui->twFileBrowser, SLOT(onFilesFoldersSelected()));

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But i see that i never land in the slot function. I have debugged and at the emitting part of the signal, it is assumed that nothing is connected.

if (!sender->d_func()->isSignalConnected(signal_index))
        return; // nothing connected to these signals, and no spy .... returns here !! slot is not called !!

if (!sender->d_func()->isSignalConnected(signal_index))
        return; // nothing connected to these signals, and no spy .... returns here !! slot is not called !!

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Could anyone please explain what I am doing wrong ??

Thanks for your time,
Prakash

[high_flyer]

are you sure you are emitting the signal?
Also, look at the debug output, if there is a problem with the signal slot connection a warning will be plotted to std output.

[Lykurg]

...and did you use the Q_OBJECT macro?

P.s.:

I am pretty new to Qt and I accept this could well be a dumb question.

therefore we have Newbie section where we also help

[prakash437]

Thank you guys for your answers !! I'm at work and I don't have the source code right now .. So I cannot confirm .. But i am sure, I missed out the Q_OBJECT macro definition !!!

Thanks again