1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/* 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);
}
|
