Mercurial > sdl-ios-xcode
view test/checkkeys.c @ 3958:85b6fb6a5e3c SDL-1.2
Actually, this is a better fix...clear the error state once if everything we
need loaded; it's more efficient, and works even if the last unnecessary
xrandr symbol failed to load. Otherwise, leave the original loadso error, so
the end user can find out what symbol failed.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Wed, 13 Jun 2007 08:00:10 +0000 |
parents | 7c7ddaf195bf |
children | 782fd950bd46 c121d94672cb |
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/* Simple program: Loop, watching keystrokes Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to pump the event loop and catch keystrokes. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include "SDL.h" /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ static void quit(int rc) { SDL_Quit(); exit(rc); } static void print_modifiers(void) { int mod; printf(" modifiers:"); mod = SDL_GetModState(); if(!mod) { printf(" (none)"); return; } if(mod & KMOD_LSHIFT) printf(" LSHIFT"); if(mod & KMOD_RSHIFT) printf(" RSHIFT"); if(mod & KMOD_LCTRL) printf(" LCTRL"); if(mod & KMOD_RCTRL) printf(" RCTRL"); if(mod & KMOD_LALT) printf(" LALT"); if(mod & KMOD_RALT) printf(" RALT"); if(mod & KMOD_LMETA) printf(" LMETA"); if(mod & KMOD_RMETA) printf(" RMETA"); if(mod & KMOD_NUM) printf(" NUM"); if(mod & KMOD_CAPS) printf(" CAPS"); if(mod & KMOD_MODE) printf(" MODE"); } static void PrintKey(SDL_keysym *sym, int pressed) { /* Print the keycode, name and state */ if ( sym->sym ) { printf("Key %s: %d-%s ", pressed ? "pressed" : "released", sym->sym, SDL_GetKeyName(sym->sym)); } else { printf("Unknown Key (scancode = %d) %s ", sym->scancode, pressed ? "pressed" : "released"); } /* Print the translated character, if one exists */ if ( sym->unicode ) { /* Is it a control-character? */ if ( sym->unicode < ' ' ) { printf(" (^%c)", sym->unicode+'@'); } else { #ifdef UNICODE printf(" (%c)", sym->unicode); #else /* This is a Latin-1 program, so only show 8-bits */ if ( !(sym->unicode & 0xFF00) ) printf(" (%c)", sym->unicode); else printf(" (0x%X)", sym->unicode); #endif } } print_modifiers(); printf("\n"); } int main(int argc, char *argv[]) { SDL_Event event; int done; Uint32 videoflags; /* Initialize SDL */ if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); return(1); } videoflags = SDL_SWSURFACE; while( argc > 1 ) { --argc; if ( argv[argc] && !strcmp(argv[argc], "-fullscreen") ) { videoflags |= SDL_FULLSCREEN; } else { fprintf(stderr, "Usage: %s [-fullscreen]\n", argv[0]); quit(1); } } /* Set 640x480 video mode */ if ( SDL_SetVideoMode(640, 480, 0, videoflags) == NULL ) { fprintf(stderr, "Couldn't set 640x480 video mode: %s\n", SDL_GetError()); quit(2); } /* Enable UNICODE translation for keyboard input */ SDL_EnableUNICODE(1); /* Enable auto repeat for keyboard input */ SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL); /* Watch keystrokes */ done = 0; while ( !done ) { /* Check for events */ SDL_WaitEvent(&event); switch (event.type) { case SDL_KEYDOWN: PrintKey(&event.key.keysym, 1); break; case SDL_KEYUP: PrintKey(&event.key.keysym, 0); break; case SDL_MOUSEBUTTONDOWN: /* Any button press quits the app... */ case SDL_QUIT: done = 1; break; default: break; } } SDL_Quit(); return(0); }