Question

I have my own class based in QWidget. I put this widget in QMainWindow and I need catch mouse click on this widget.

I tried:

connect(my_widget, SIGNAL(clicked()), this, SLOT(exit(0)));

But nothing is happening. How can I do it?

Answer 1

QWidget does not have a clicked() signal, and QMainWindow does not have an exit() slot. It is impossible to connect to an unexisting signal and unexisting slot. The return value of the connect must be true if the connect is successful. Check this value when you make connections to be sure that your code will work correctly.

To exit your application, you must call qApp->quit()

Also, as it has been mentioned by others, you will have to install an eventFilter or reimplement the

void QWidget::mousePressEvent ( QMouseEvent * event )   [virtual protected]

or

void QWidget::mouseReleaseEvent ( QMouseEvent * event )   [virtual protected]

methods.

There are plenty of examples in the official doc of Qt, this for example reimplements the mousePressEvent(QMouseEvent *event) method.

For the eventFilter option, see this small example.

Hope this helps.