def keyPressEvent(self, event):
if event.key() == Qt.Key_Left:
r = Rotation().set_from_angle_about_unit_vector(-0.05, [0, 0, -1])
self.trackball.rotation_incremented.emit(r)
elif event.key() == Qt.Key_Right:
r = Rotation().set_from_angle_about_unit_vector( 0.05, [0, 0, -1])
self.trackball.rotation_incremented.emit(r)
elif event.key() == Qt.Key_Up:
self.trackball.pixel_translated.emit(0, 0, 50);
elif event.key() == Qt.Key_Down:
self.trackball.pixel_translated.emit(0, 0, -50);
QGLWidget.keyPressEvent(self, event) # not my event
