SDL_active.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:2k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL_active.c,v 1.4 2002/04/22 21:38:02 wmay Exp $";
- #endif
- /* Application focus/iconification handling code for SDL */
- #include <stdio.h>
- #include <string.h>
- #include "SDL_events.h"
- #include "SDL_events_c.h"
- /* These are static for our active event handling code */
- static Uint8 SDL_appstate = 0;
- /* Public functions */
- int SDL_AppActiveInit(void)
- {
- /* Start completely active */
- SDL_appstate = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);
- /* That's it! */
- return(0);
- }
- Uint8 SDL_GetAppState(void)
- {
- return(SDL_appstate);
- }
- /* This is global for SDL_eventloop.c */
- int SDL_PrivateAppActive(Uint8 gain, Uint8 state)
- {
- int posted;
- Uint8 new_state;
- /* Modify the current state with the given mask */
- if ( gain ) {
- new_state = (SDL_appstate | state);
- } else {
- new_state = (SDL_appstate & ~state);
- }
- /* Drop events that don't change state */
- if ( new_state == SDL_appstate ) {
- return(0);
- }
- /* Update internal active state */
- SDL_appstate = new_state;
- /* Post the event, if desired */
- posted = 0;
- if ( SDL_ProcessEvents[SDL_ACTIVEEVENT] == SDL_ENABLE ) {
- SDL_Event event;
- memset(&event, 0, sizeof(event));
- event.type = SDL_ACTIVEEVENT;
- event.active.gain = gain;
- event.active.state = state;
- if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
- posted = 1;
- SDL_PushEvent(&event);
- }
- }
- /* If we lost keyboard focus, post key-up events */
- if ( (state & SDL_APPINPUTFOCUS) && !gain ) {
- SDL_ResetKeyboard();
- }
- return(posted);
- }