e14743d1 |
1 | |
2 | /* Simple program to test the SDL joystick routines */ |
3 | |
4 | #include <stdio.h> |
5 | #include <stdlib.h> |
6 | #include <string.h> |
7 | |
8 | #include "SDL.h" |
9 | |
10 | #define SCREEN_WIDTH 640 |
11 | #define SCREEN_HEIGHT 480 |
12 | |
13 | void WatchJoystick(SDL_Joystick *joystick) |
14 | { |
15 | SDL_Surface *screen; |
16 | const char *name; |
17 | int i, done; |
18 | SDL_Event event; |
19 | int x, y, draw; |
20 | SDL_Rect axis_area[2]; |
21 | |
22 | /* Set a video mode to display joystick axis position */ |
23 | screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, 16, 0); |
24 | if ( screen == NULL ) { |
25 | fprintf(stderr, "Couldn't set video mode: %s\n",SDL_GetError()); |
26 | return; |
27 | } |
28 | |
29 | /* Print info about the joystick we are watching */ |
30 | name = SDL_JoystickName(SDL_JoystickIndex(joystick)); |
31 | printf("Watching joystick %d: (%s)\n", SDL_JoystickIndex(joystick), |
32 | name ? name : "Unknown Joystick"); |
33 | printf("Joystick has %d axes, %d hats, %d balls, and %d buttons\n", |
34 | SDL_JoystickNumAxes(joystick), SDL_JoystickNumHats(joystick), |
35 | SDL_JoystickNumBalls(joystick),SDL_JoystickNumButtons(joystick)); |
36 | |
37 | /* Initialize drawing rectangles */ |
38 | memset(axis_area, 0, (sizeof axis_area)); |
39 | draw = 0; |
40 | |
41 | /* Loop, getting joystick events! */ |
42 | done = 0; |
43 | while ( ! done ) { |
44 | while ( SDL_PollEvent(&event) ) { |
45 | switch (event.type) { |
46 | case SDL_JOYAXISMOTION: |
47 | printf("Joystick %d axis %d value: %d\n", |
48 | event.jaxis.which, |
49 | event.jaxis.axis, |
50 | event.jaxis.value); |
51 | break; |
52 | case SDL_JOYHATMOTION: |
53 | printf("Joystick %d hat %d value:", |
54 | event.jhat.which, |
55 | event.jhat.hat); |
56 | if ( event.jhat.value == SDL_HAT_CENTERED ) |
57 | printf(" centered"); |
58 | if ( event.jhat.value & SDL_HAT_UP ) |
59 | printf(" up"); |
60 | if ( event.jhat.value & SDL_HAT_RIGHT ) |
61 | printf(" right"); |
62 | if ( event.jhat.value & SDL_HAT_DOWN ) |
63 | printf(" down"); |
64 | if ( event.jhat.value & SDL_HAT_LEFT ) |
65 | printf(" left"); |
66 | printf("\n"); |
67 | break; |
68 | case SDL_JOYBALLMOTION: |
69 | printf("Joystick %d ball %d delta: (%d,%d)\n", |
70 | event.jball.which, |
71 | event.jball.ball, |
72 | event.jball.xrel, |
73 | event.jball.yrel); |
74 | break; |
75 | case SDL_JOYBUTTONDOWN: |
76 | printf("Joystick %d button %d down\n", |
77 | event.jbutton.which, |
78 | event.jbutton.button); |
79 | break; |
80 | case SDL_JOYBUTTONUP: |
81 | printf("Joystick %d button %d up\n", |
82 | event.jbutton.which, |
83 | event.jbutton.button); |
84 | break; |
85 | case SDL_KEYDOWN: |
86 | if ( event.key.keysym.sym != SDLK_ESCAPE ) { |
87 | break; |
88 | } |
89 | /* Fall through to signal quit */ |
90 | case SDL_QUIT: |
91 | done = 1; |
92 | break; |
93 | default: |
94 | break; |
95 | } |
96 | } |
97 | /* Update visual joystick state */ |
98 | for ( i=0; i<SDL_JoystickNumButtons(joystick); ++i ) { |
99 | SDL_Rect area; |
100 | |
101 | area.x = i*34; |
102 | area.y = SCREEN_HEIGHT-34; |
103 | area.w = 32; |
104 | area.h = 32; |
105 | if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) { |
106 | SDL_FillRect(screen, &area, 0xFFFF); |
107 | } else { |
108 | SDL_FillRect(screen, &area, 0x0000); |
109 | } |
110 | SDL_UpdateRects(screen, 1, &area); |
111 | } |
112 | |
113 | /* Erase previous axes */ |
114 | SDL_FillRect(screen, &axis_area[draw], 0x0000); |
115 | |
116 | /* Draw the X/Y axis */ |
117 | draw = !draw; |
118 | x = (((int)SDL_JoystickGetAxis(joystick, 0))+32768); |
119 | x *= SCREEN_WIDTH; |
120 | x /= 65535; |
121 | if ( x < 0 ) { |
122 | x = 0; |
123 | } else |
124 | if ( x > (SCREEN_WIDTH-16) ) { |
125 | x = SCREEN_WIDTH-16; |
126 | } |
127 | y = (((int)SDL_JoystickGetAxis(joystick, 1))+32768); |
128 | y *= SCREEN_HEIGHT; |
129 | y /= 65535; |
130 | if ( y < 0 ) { |
131 | y = 0; |
132 | } else |
133 | if ( y > (SCREEN_HEIGHT-16) ) { |
134 | y = SCREEN_HEIGHT-16; |
135 | } |
136 | axis_area[draw].x = (Sint16)x; |
137 | axis_area[draw].y = (Sint16)y; |
138 | axis_area[draw].w = 16; |
139 | axis_area[draw].h = 16; |
140 | SDL_FillRect(screen, &axis_area[draw], 0xFFFF); |
141 | |
142 | SDL_UpdateRects(screen, 2, axis_area); |
143 | } |
144 | } |
145 | |
146 | int main(int argc, char *argv[]) |
147 | { |
148 | const char *name; |
149 | int i; |
150 | SDL_Joystick *joystick; |
151 | |
152 | /* Initialize SDL (Note: video is required to start event loop) */ |
153 | if ( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_JOYSTICK) < 0 ) { |
154 | fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); |
155 | exit(1); |
156 | } |
157 | |
158 | /* Print information about the joysticks */ |
159 | printf("There are %d joysticks attached\n", SDL_NumJoysticks()); |
160 | for ( i=0; i<SDL_NumJoysticks(); ++i ) { |
161 | name = SDL_JoystickName(i); |
162 | printf("Joystick %d: %s\n",i,name ? name : "Unknown Joystick"); |
163 | joystick = SDL_JoystickOpen(i); |
164 | if (joystick == NULL) { |
165 | fprintf(stderr, "SDL_JoystickOpen(%d) failed: %s\n", i, SDL_GetError()); |
166 | } else { |
167 | printf(" axes: %d\n", SDL_JoystickNumAxes(joystick)); |
168 | printf(" balls: %d\n", SDL_JoystickNumBalls(joystick)); |
169 | printf(" hats: %d\n", SDL_JoystickNumHats(joystick)); |
170 | printf(" buttons: %d\n", SDL_JoystickNumButtons(joystick)); |
171 | SDL_JoystickClose(joystick); |
172 | } |
173 | } |
174 | |
175 | if ( argv[1] ) { |
176 | joystick = SDL_JoystickOpen(atoi(argv[1])); |
177 | if ( joystick == NULL ) { |
178 | printf("Couldn't open joystick %d: %s\n", atoi(argv[1]), |
179 | SDL_GetError()); |
180 | } else { |
181 | WatchJoystick(joystick); |
182 | SDL_JoystickClose(joystick); |
183 | } |
184 | } |
185 | SDL_QuitSubSystem(SDL_INIT_VIDEO|SDL_INIT_JOYSTICK); |
186 | |
187 | return(0); |
188 | } |