Select pixel from image

[high_flyer]

Your English is just fine, I have seen much worse here, believe me!

I read that the QLabel class could not get a mouseClicked.

Where did you read that?

Do I have to use another class?

In your code you are setting a QPixmap in your QLabel.
The QPixmap is the object that is representing your Image.
You can either:
1. install an event filter on the QPixmap to extract the mouse position during a mousePressEvent()
2. Subclass QPixmap and override the mousePressEvent().