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 !!

Qt Code: 
  1. class QFileBrowser : public QTreeWidget
  2. {
  3. ..
  4. public slots:
  5.     void onFilesFoldersSelected();
  6. };
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The main window has a signal defined as follows !!
Qt Code: 
  1. signals:
  2.     void filesFoldersSelected();
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the signals and slot are connected as here !!
Qt Code: 
  1. 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.
Qt Code: 
  1. if (!sender->d_func()->isSignalConnected(signal_index))
  2.         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