e14743d1 |
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 | /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
14 | static void quit(int rc) |
15 | { |
16 | SDL_Quit(); |
17 | exit(rc); |
18 | } |
19 | |
20 | static void print_modifiers(void) |
21 | { |
22 | int mod; |
23 | printf(" modifiers:"); |
24 | mod = SDL_GetModState(); |
25 | if(!mod) { |
26 | printf(" (none)"); |
27 | return; |
28 | } |
29 | if(mod & KMOD_LSHIFT) |
30 | printf(" LSHIFT"); |
31 | if(mod & KMOD_RSHIFT) |
32 | printf(" RSHIFT"); |
33 | if(mod & KMOD_LCTRL) |
34 | printf(" LCTRL"); |
35 | if(mod & KMOD_RCTRL) |
36 | printf(" RCTRL"); |
37 | if(mod & KMOD_LALT) |
38 | printf(" LALT"); |
39 | if(mod & KMOD_RALT) |
40 | printf(" RALT"); |
41 | if(mod & KMOD_LMETA) |
42 | printf(" LMETA"); |
43 | if(mod & KMOD_RMETA) |
44 | printf(" RMETA"); |
45 | if(mod & KMOD_NUM) |
46 | printf(" NUM"); |
47 | if(mod & KMOD_CAPS) |
48 | printf(" CAPS"); |
49 | if(mod & KMOD_MODE) |
50 | printf(" MODE"); |
51 | } |
52 | |
53 | static void PrintKey(SDL_keysym *sym, int pressed) |
54 | { |
55 | /* Print the keycode, name and state */ |
56 | if ( sym->sym ) { |
57 | printf("Key %s: %d-%s ", pressed ? "pressed" : "released", |
58 | sym->sym, SDL_GetKeyName(sym->sym)); |
59 | } else { |
60 | printf("Unknown Key (scancode = %d) %s ", sym->scancode, |
61 | pressed ? "pressed" : "released"); |
62 | } |
63 | |
64 | /* Print the translated character, if one exists */ |
65 | if ( sym->unicode ) { |
66 | /* Is it a control-character? */ |
67 | if ( sym->unicode < ' ' ) { |
68 | printf(" (^%c)", sym->unicode+'@'); |
69 | } else { |
70 | #ifdef UNICODE |
71 | printf(" (%c)", sym->unicode); |
72 | #else |
73 | /* This is a Latin-1 program, so only show 8-bits */ |
74 | if ( !(sym->unicode & 0xFF00) ) |
75 | printf(" (%c)", sym->unicode); |
76 | else |
77 | printf(" (0x%X)", sym->unicode); |
78 | #endif |
79 | } |
80 | } |
81 | print_modifiers(); |
82 | printf("\n"); |
83 | } |
84 | |
85 | int main(int argc, char *argv[]) |
86 | { |
87 | SDL_Event event; |
88 | int done; |
89 | Uint32 videoflags; |
90 | |
91 | /* Initialize SDL */ |
92 | if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { |
93 | fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); |
94 | return(1); |
95 | } |
96 | |
97 | videoflags = SDL_SWSURFACE; |
98 | while( argc > 1 ) { |
99 | --argc; |
100 | if ( argv[argc] && !strcmp(argv[argc], "-fullscreen") ) { |
101 | videoflags |= SDL_FULLSCREEN; |
102 | } else { |
103 | fprintf(stderr, "Usage: %s [-fullscreen]\n", argv[0]); |
104 | quit(1); |
105 | } |
106 | } |
107 | |
108 | /* Set 640x480 video mode */ |
109 | if ( SDL_SetVideoMode(640, 480, 0, videoflags) == NULL ) { |
110 | fprintf(stderr, "Couldn't set 640x480 video mode: %s\n", |
111 | SDL_GetError()); |
112 | quit(2); |
113 | } |
114 | |
115 | /* Enable UNICODE translation for keyboard input */ |
116 | SDL_EnableUNICODE(1); |
117 | |
118 | /* Enable auto repeat for keyboard input */ |
119 | SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, |
120 | SDL_DEFAULT_REPEAT_INTERVAL); |
121 | |
122 | /* Watch keystrokes */ |
123 | done = 0; |
124 | while ( !done ) { |
125 | /* Check for events */ |
126 | SDL_WaitEvent(&event); |
127 | switch (event.type) { |
128 | case SDL_KEYDOWN: |
129 | PrintKey(&event.key.keysym, 1); |
130 | break; |
131 | case SDL_KEYUP: |
132 | PrintKey(&event.key.keysym, 0); |
133 | break; |
134 | case SDL_MOUSEBUTTONDOWN: |
135 | /* Any button press quits the app... */ |
136 | case SDL_QUIT: |
137 | done = 1; |
138 | break; |
139 | default: |
140 | break; |
141 | } |
142 | } |
143 | |
144 | SDL_Quit(); |
145 | return(0); |
146 | } |