diff options
| -rw-r--r-- | src/video/sdl_v.cpp | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/src/video/sdl_v.cpp b/src/video/sdl_v.cpp index 477314e0d..984556237 100644 --- a/src/video/sdl_v.cpp +++ b/src/video/sdl_v.cpp @@ -29,6 +29,8 @@ static FVideoDriver_SDL iFVideoDriver_SDL; static SDL_Surface *_sdl_screen; static bool _all_modes; +/** Flag used to determine if _cursor.fix_at has changed. */ +static bool _last_fix_at; /** Whether the drawing is/may be done in a separate thread. */ static bool _draw_threaded; @@ -363,17 +365,29 @@ static int PollEvent() { SDL_Event ev; + if (_cursor.fix_at != _last_fix_at) { + _last_fix_at = _cursor.fix_at; + if (_last_fix_at) { + /* Move to centre of window */ + SDL_CALL SDL_WarpMouse(_screen.width / 2, _screen.height / 2); + + } else { + /* Restore position */ + SDL_CALL SDL_WarpMouse(_cursor.pos.x, _cursor.pos.y); + } + } + if (!SDL_CALL SDL_PollEvent(&ev)) return -2; switch (ev.type) { case SDL_MOUSEMOTION: if (_cursor.fix_at) { - int dx = ev.motion.x - _cursor.pos.x; - int dy = ev.motion.y - _cursor.pos.y; + int dx = ev.motion.x - _screen.width / 2; + int dy = ev.motion.y - _screen.height / 2; if (dx != 0 || dy != 0) { _cursor.delta.x += dx; _cursor.delta.y += dy; - SDL_CALL SDL_WarpMouse(_cursor.pos.x, _cursor.pos.y); + SDL_CALL SDL_WarpMouse(_screen.width / 2, _screen.height / 2); } } else { _cursor.delta.x = ev.motion.x - _cursor.pos.x; |