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x11: make last mouse coords sane upon window entry (thanks, Cengiz!).

(and thanks to Cengiz for many of the previous Unreal-related
patches! They were generically credited to Epic Games, but a large
amount of that work was his contribution.)

Fixes Bugzilla #3067.
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icculus committed Jan 8, 2016
1 parent 757e994 commit ed620333667845ff179d95d0adb778881b043e7f
Showing with 5 additions and 1 deletion.
  1. +5 −1 src/video/x11/SDL_x11events.c
@@ -636,6 +636,7 @@ X11_DispatchEvent(_THIS)

/* Gaining mouse coverage? */
case EnterNotify:{
SDL_Mouse *mouse = SDL_GetMouse();
#ifdef DEBUG_XEVENTS
printf("window %p: EnterNotify! (%d,%d,%d)\n", data,
xevent.xcrossing.x,
@@ -648,7 +649,10 @@ X11_DispatchEvent(_THIS)
#endif
SDL_SetMouseFocus(data->window);

if (!SDL_GetMouse()->relative_mode) {
mouse->last_x = xevent.xcrossing.x;
mouse->last_y = xevent.xcrossing.y;

if (!mouse->relative_mode) {
SDL_SendMouseMotion(data->window, 0, 0, xevent.xcrossing.x, xevent.xcrossing.y);
}
}

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