mouse moving don't produce mouse events

Below is the qt assistant description:

Quote:

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Mouse move events will occur only when a mouse button is pressed down, unless mouse tracking has been enabled with QWidget::setMouseTracking().

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Howerer, I can't receive any mouse event if I don't press down a mouse button.And I have
called QWidget::setMouseTracking(TRUE). What's wrong here?

Thanks you!

Is it anyhow possible that there would be a typo in the function declaration?
Make sure it matches this signature:

Code:

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virtual void mouseMoveEvent(QMouseEvent* e);

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Also, make sure that the base class marks it as virtual if it's overriding it too..