SDL_MouseMotionEvent - Mouse motion event structure

SDL_MouseMotionEvent is a member of the SDL_Event union and is used when an event of type SDL_MOUSEMOTION
       is reported.

       Simply put, a SDL_MOUSEMOTION type event occurs when a user moves the mouse within the application window
       or when SDL_WarpMouse is called. Both the absolute (x and y) and relative (xrel and yrel) coordinates are
       reported  along  with  the  current  button states (state). The button state can be interpreted using the
       SDL_BUTTON macro (see SDL_GetMouseState).

       If the cursor is hidden (SDL_ShowCursor(0)) and the  input  is  grabbed  (SDL_WM_GrabInput(SDL_GRAB_ON)),
       then the mouse will give relative motion events even when the cursor reaches the edge fo the screen. This
       is currently only implemented on Windows and Linux/Unix-a-likes.

       SDL_MouseMotionEvent - Mouse motion event structure

SDL_Event, SDL_MouseButtonEvent

SDL                                          Tue 11 Sep 2001, 22:59                      SDL_MouseMotionEvent(3)

typeSDL_MOUSEMOTIONstate               The current button state

       x, y                The X/Y coordinates of the mouse

       xrel, yrel          Relative motion in the X/Y direction

       typedef struct{
         Uint8 type;
         Uint8 state;
         Uint16 x, y;
         Sint16 xrel, yrel;
       } SDL_MouseMotionEvent;