Mercurial > sdl-ios-xcode
view docs/man3/SDL_WM_GrabInput.3 @ 4392:2b8c1aea633b SDL-1.2
Fixed bug #898
Jeremiah Morris 2009-12-09 16:07:17 PST
No-op GlobalToLocal translations in fullscreen mode
On my MacBook Pro running 10.6, I noticed a small upward bias on mouse movement
in a fullscreen SDL application. The app uses WarpCursor and GetMouseState in a
loop to measure relative movement. I tracked it down to NSWindow's
convertBaseToScreen: routine, which added a 2-pixel offset on the Y coordinate
instead of the expected (+0,+0) translation.
In fullscreen mode, QZ_PrivateWarpCursor() does not translate the desired
position through QZ_PrivateGlobalToLocal() before passing it to the Core
Graphics system. However, QZ_GetMouseLocation() does call the reverse
QZ_PrivateLocalToGlobal() even in fullscreen mode. This asymmetry caused
problems each time the mouse was moved.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 11 Dec 2009 15:31:37 +0000 |
| parents | 1238da4a7112 |
| children |
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.TH "SDL_WM_GrabInput" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME" SDL_WM_GrabInput \- Grabs mouse and keyboard input\&. .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBSDL_GrabMode \fBSDL_WM_GrabInput\fP\fR(\fBSDL_GrabMode mode\fR); .SH "DESCRIPTION" .PP Grabbing means that the mouse is confined to the application window, and nearly all keyboard input is passed directly to the application, and not interpreted by a window manager, if any\&. .PP When \fBmode\fR is \fBSDL_GRAB_QUERY\fP the grab mode is not changed, but the current grab mode is returned\&. .PP .PP .nf \f(CWtypedef enum { SDL_GRAB_QUERY, SDL_GRAB_OFF, SDL_GRAB_ON } SDL_GrabMode;\fR .fi .PP .SH "RETURN VALUE" .PP The current/new \fBSDL_GrabMode\fR\&. .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01