Selective tracking of mouse in QMainWindow

1
votes

I'm relatively new to Qt.

I am writing an application where I am generating a pseudorandom numbers and keys and I would like to seed the generators with random mouse movements captured within a QMainWindow. Additionally, I would like to be able to turn this feature off and on when the user presses a QButton.

From what I understand I should be able to use connect() and disconnect() to a signal in QMainWindow that is emitted when the user moves the mouse. Is this the best approach?

My problem is I'm not sure what signal I should connect to. I have searched the Qt Documentation but can't find a signal that's generated when the mouse is moved over a QWidget.

1
c++qt

1 Answers

3
votes

You have to override void QWidget::mouseMoveEvent ( QMouseEvent * event ) in your QMainWindow to capture the mouse move events. see http://qt-project.org/doc/qt-4.8/qwidget.html#mouseMoveEvent

You probably want to do an event->ignore() in the override to allow propagation of the event.

You also have to enable mouse tracking with void setMouseTracking ( bool enable ) to receive mouse move event when no button is pressed. see http://qt-project.org/doc/qt-4.8/qwidget.html#mouseTracking-prop