-Returns true if this was a motion event (whether some buttons are currently
-pressed or not, use \helpref{Dragging}{wxmouseeventdragging} if you need to
-distinguish between these situations).
+Returns true if this was a motion event and no mouse buttons were pressed.
+If any mouse button is held pressed, then this method returns \false and
+\helpref{Dragging}{wxmouseeventdragging} returns \true.
+