Mercurial > sdl-ios-xcode
annotate test/testjoystick.c @ 2193:e857f02e709e
Use correct function
author | Patrice Mandin <patmandin@gmail.com> |
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date | Sat, 14 Jul 2007 00:07:37 +0000 |
parents | c121d94672cb |
children | 893c862eed86 |
rev | line source |
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0 | 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 | |
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13 void |
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14 WatchJoystick(SDL_Joystick * joystick) |
0 | 15 { |
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16 SDL_Surface *screen; |
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17 const char *name; |
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18 int i, done; |
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19 SDL_Event event; |
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20 int x, y, draw; |
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21 SDL_Rect axis_area[6][2]; |
0 | 22 |
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23 /* Set a video mode to display joystick axis position */ |
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24 screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, 16, 0); |
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25 if (screen == NULL) { |
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26 fprintf(stderr, "Couldn't set video mode: %s\n", SDL_GetError()); |
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27 return; |
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28 } |
0 | 29 |
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30 /* Print info about the joystick we are watching */ |
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31 name = SDL_JoystickName(SDL_JoystickIndex(joystick)); |
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32 printf("Watching joystick %d: (%s)\n", SDL_JoystickIndex(joystick), |
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33 name ? name : "Unknown Joystick"); |
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34 printf("Joystick has %d axes, %d hats, %d balls, and %d buttons\n", |
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35 SDL_JoystickNumAxes(joystick), SDL_JoystickNumHats(joystick), |
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36 SDL_JoystickNumBalls(joystick), SDL_JoystickNumButtons(joystick)); |
0 | 37 |
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38 /* Initialize drawing rectangles */ |
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39 memset(axis_area, 0, (sizeof axis_area)); |
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40 draw = 0; |
0 | 41 |
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42 /* Loop, getting joystick events! */ |
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43 done = 0; |
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44 while (!done) { |
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45 while (SDL_PollEvent(&event)) { |
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46 switch (event.type) { |
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47 case SDL_JOYAXISMOTION: |
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48 printf("Joystick %d axis %d value: %d\n", |
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49 event.jaxis.which, |
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50 event.jaxis.axis, event.jaxis.value); |
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51 break; |
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52 case SDL_JOYHATMOTION: |
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53 printf("Joystick %d hat %d value:", |
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54 event.jhat.which, event.jhat.hat); |
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55 if (event.jhat.value == SDL_HAT_CENTERED) |
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56 printf(" centered"); |
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57 if (event.jhat.value & SDL_HAT_UP) |
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58 printf(" up"); |
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59 if (event.jhat.value & SDL_HAT_RIGHT) |
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60 printf(" right"); |
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61 if (event.jhat.value & SDL_HAT_DOWN) |
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62 printf(" down"); |
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63 if (event.jhat.value & SDL_HAT_LEFT) |
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64 printf(" left"); |
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65 printf("\n"); |
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66 break; |
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67 case SDL_JOYBALLMOTION: |
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68 printf("Joystick %d ball %d delta: (%d,%d)\n", |
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69 event.jball.which, |
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70 event.jball.ball, event.jball.xrel, event.jball.yrel); |
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71 break; |
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72 case SDL_JOYBUTTONDOWN: |
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73 printf("Joystick %d button %d down\n", |
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74 event.jbutton.which, event.jbutton.button); |
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75 break; |
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76 case SDL_JOYBUTTONUP: |
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77 printf("Joystick %d button %d up\n", |
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78 event.jbutton.which, event.jbutton.button); |
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79 break; |
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80 case SDL_KEYDOWN: |
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81 if (event.key.keysym.sym != SDLK_ESCAPE) { |
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82 break; |
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83 } |
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84 /* Fall through to signal quit */ |
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85 case SDL_QUIT: |
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86 done = 1; |
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87 break; |
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88 default: |
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89 break; |
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90 } |
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91 } |
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92 /* Update visual joystick state */ |
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93 for (i = 0; i < SDL_JoystickNumButtons(joystick); ++i) { |
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94 SDL_Rect area; |
0 | 95 |
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96 area.x = i * 34; |
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97 area.y = SCREEN_HEIGHT - 34; |
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98 area.w = 32; |
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99 area.h = 32; |
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100 if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) { |
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101 SDL_FillRect(screen, &area, 0xFFFF); |
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102 } else { |
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103 SDL_FillRect(screen, &area, 0x0000); |
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104 } |
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105 SDL_UpdateRects(screen, 1, &area); |
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106 } |
0 | 107 |
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108 for (i = 0; |
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109 i < SDL_JoystickNumAxes(joystick) / 2 |
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110 && i < SDL_arraysize(axis_area); ++i) { |
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111 /* Erase previous axes */ |
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112 SDL_FillRect(screen, &axis_area[i][draw], 0x0000); |
0 | 113 |
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114 /* Draw the X/Y axis */ |
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115 draw = !draw; |
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116 x = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 0)) + 32768); |
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117 x *= SCREEN_WIDTH; |
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118 x /= 65535; |
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119 if (x < 0) { |
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120 x = 0; |
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121 } else if (x > (SCREEN_WIDTH - 16)) { |
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122 x = SCREEN_WIDTH - 16; |
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123 } |
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124 y = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 1)) + 32768); |
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125 y *= SCREEN_HEIGHT; |
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126 y /= 65535; |
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127 if (y < 0) { |
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128 y = 0; |
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129 } else if (y > (SCREEN_HEIGHT - 16)) { |
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130 y = SCREEN_HEIGHT - 16; |
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131 } |
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132 axis_area[i][draw].x = (Sint16) x; |
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133 axis_area[i][draw].y = (Sint16) y; |
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134 axis_area[i][draw].w = 16; |
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135 axis_area[i][draw].h = 16; |
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136 SDL_FillRect(screen, &axis_area[i][draw], 0xFFFF); |
1854 | 137 |
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138 SDL_UpdateRects(screen, 2, axis_area[i]); |
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139 } |
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140 } |
0 | 141 } |
142 | |
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143 int |
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144 main(int argc, char *argv[]) |
0 | 145 { |
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146 const char *name; |
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147 int i; |
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148 SDL_Joystick *joystick; |
0 | 149 |
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150 /* Initialize SDL (Note: video is required to start event loop) */ |
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151 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) { |
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152 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); |
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153 exit(1); |
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154 } |
0 | 155 |
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156 /* Print information about the joysticks */ |
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157 printf("There are %d joysticks attached\n", SDL_NumJoysticks()); |
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158 for (i = 0; i < SDL_NumJoysticks(); ++i) { |
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159 name = SDL_JoystickName(i); |
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160 printf("Joystick %d: %s\n", i, name ? name : "Unknown Joystick"); |
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161 } |
0 | 162 |
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163 if (argv[1]) { |
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164 joystick = SDL_JoystickOpen(atoi(argv[1])); |
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165 if (joystick == NULL) { |
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166 printf("Couldn't open joystick %d: %s\n", atoi(argv[1]), |
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167 SDL_GetError()); |
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168 } else { |
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169 WatchJoystick(joystick); |
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170 SDL_JoystickClose(joystick); |
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171 } |
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172 } |
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173 SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK); |
0 | 174 |
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175 return (0); |
0 | 176 } |