Mercurial > sdl-ios-xcode
annotate test/checkkeys.c @ 816:428f688f2ad2
Date: Fri, 13 Feb 2004 17:03:16 +0100
From: Max Horn
Subject: Modifier key fix
The internal modifier state can get out of sync with reality. To
trigger this, do for example this:
1) Launch an SDL app
2) Alt-click on the desktop (this will hide the SDL app).
3) Bring the SDL app back to the front
4) SDL will still think alt is pressed (and as such will treat left
clicks like middle clicks). If you press and release alt, it'll be fine
again.
The attached patch cures this by rechecking the modifier state whenever
we process an event.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 13 Feb 2004 17:57:16 +0000 |
| parents | 806fcbde0af3 |
| children | be9c9c8f6d53 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* Simple program: Loop, watching keystrokes | |
| 3 Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to | |
| 4 pump the event loop and catch keystrokes. | |
| 5 */ | |
| 6 | |
| 7 #include <stdio.h> | |
| 8 #include <stdlib.h> | |
| 9 #include <string.h> | |
| 10 | |
| 11 #include "SDL.h" | |
| 12 | |
| 13 static void print_modifiers(void) | |
| 14 { | |
| 15 int mod; | |
| 16 printf(" modifiers:"); | |
| 17 mod = SDL_GetModState(); | |
| 18 if(!mod) { | |
| 19 printf(" (none)"); | |
| 20 return; | |
| 21 } | |
| 22 if(mod & KMOD_LSHIFT) | |
| 23 printf(" LSHIFT"); | |
| 24 if(mod & KMOD_RSHIFT) | |
| 25 printf(" RSHIFT"); | |
| 26 if(mod & KMOD_LCTRL) | |
| 27 printf(" LCTRL"); | |
| 28 if(mod & KMOD_RCTRL) | |
| 29 printf(" RCTRL"); | |
| 30 if(mod & KMOD_LALT) | |
| 31 printf(" LALT"); | |
| 32 if(mod & KMOD_RALT) | |
| 33 printf(" RALT"); | |
| 34 if(mod & KMOD_LMETA) | |
| 35 printf(" LMETA"); | |
| 36 if(mod & KMOD_RMETA) | |
| 37 printf(" RMETA"); | |
| 38 if(mod & KMOD_NUM) | |
| 39 printf(" NUM"); | |
| 40 if(mod & KMOD_CAPS) | |
| 41 printf(" CAPS"); | |
| 42 if(mod & KMOD_MODE) | |
| 43 printf(" MODE"); | |
| 44 } | |
| 45 | |
| 46 static void PrintKey(SDL_keysym *sym, int pressed) | |
| 47 { | |
| 48 /* Print the keycode, name and state */ | |
| 49 if ( sym->sym ) { | |
| 50 printf("Key %s: %d-%s ", pressed ? "pressed" : "released", | |
| 51 sym->sym, SDL_GetKeyName(sym->sym)); | |
| 52 } else { | |
| 53 printf("Unknown Key (scancode = %d) %s ", sym->scancode, | |
| 54 pressed ? "pressed" : "released"); | |
| 55 } | |
| 56 | |
| 57 /* Print the translated character, if one exists */ | |
| 58 if ( sym->unicode ) { | |
| 59 /* Is it a control-character? */ | |
| 60 if ( sym->unicode < ' ' ) { | |
| 61 printf(" (^%c)", sym->unicode+'@'); | |
| 62 } else { | |
| 63 #ifdef UNICODE | |
| 64 printf(" (%c)", sym->unicode); | |
| 65 #else | |
| 66 /* This is a Latin-1 program, so only show 8-bits */ | |
| 67 if ( !(sym->unicode & 0xFF00) ) | |
| 68 printf(" (%c)", sym->unicode); | |
| 69 #endif | |
| 70 } | |
| 71 } | |
| 72 print_modifiers(); | |
| 73 printf("\n"); | |
| 74 } | |
| 75 | |
| 76 int main(int argc, char *argv[]) | |
| 77 { | |
| 78 SDL_Event event; | |
| 79 int done; | |
| 473 | 80 Uint32 videoflags; |
| 0 | 81 |
| 82 /* Initialize SDL */ | |
| 83 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 84 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
| 85 exit(1); | |
| 86 } | |
| 87 atexit(SDL_Quit); | |
| 88 | |
| 473 | 89 videoflags = SDL_SWSURFACE; |
|
493
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
90 while( argc > 1 ) { |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
91 --argc; |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
92 if ( argv[argc] && !strcmp(argv[argc], "-fullscreen") ) { |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
93 videoflags |= SDL_FULLSCREEN; |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
94 } else { |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
95 fprintf(stderr, "Usage: %s [-fullscreen]\n", argv[0]); |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
96 exit(1); |
|
806fcbde0af3
Fixed a crash bug in checkkeys.c (thanks John!)
Sam Lantinga <slouken@libsdl.org>
parents:
473
diff
changeset
|
97 } |
| 473 | 98 } |
| 99 | |
| 0 | 100 /* Set 640x480 video mode */ |
| 473 | 101 if ( SDL_SetVideoMode(640, 480, 0, videoflags) == NULL ) { |
| 0 | 102 fprintf(stderr, "Couldn't set 640x480 video mode: %s\n", |
| 103 SDL_GetError()); | |
| 104 exit(2); | |
| 105 } | |
| 106 | |
| 107 /* Enable UNICODE translation for keyboard input */ | |
| 108 SDL_EnableUNICODE(1); | |
| 109 | |
| 110 /* Enable auto repeat for keyboard input */ | |
| 111 SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, | |
| 112 SDL_DEFAULT_REPEAT_INTERVAL); | |
| 113 | |
| 114 /* Watch keystrokes */ | |
| 115 done = 0; | |
| 116 while ( !done ) { | |
| 117 /* Check for events */ | |
| 118 SDL_WaitEvent(&event); | |
| 119 switch (event.type) { | |
| 120 case SDL_KEYDOWN: | |
| 121 PrintKey(&event.key.keysym, 1); | |
| 122 break; | |
| 123 case SDL_KEYUP: | |
| 124 PrintKey(&event.key.keysym, 0); | |
| 125 break; | |
| 126 case SDL_MOUSEBUTTONDOWN: | |
| 127 /* Any button press quits the app... */ | |
| 128 case SDL_QUIT: | |
| 129 done = 1; | |
| 130 break; | |
| 131 default: | |
| 132 break; | |
| 133 } | |
| 134 } | |
| 135 return(0); | |
| 136 } |