Mercurial > sdl-ios-xcode
annotate test/testjoystick.c @ 1662:782fd950bd46 SDL-1.3
Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid.
The code is now run through a consistent indent format:
indent -i4 -nut -nsc -br -ce
The headers are being converted to automatically generate doxygen documentation.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 28 May 2006 13:04:16 +0000 |
parents | 281d3f4870e5 |
children | 4da1ee79c9af |
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), |
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37 SDL_JoystickNumButtons (joystick)); |
0 | 38 |
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39 /* Initialize drawing rectangles */ |
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40 memset (axis_area, 0, (sizeof axis_area)); |
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41 draw = 0; |
0 | 42 |
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43 /* Loop, getting joystick events! */ |
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44 done = 0; |
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45 while (!done) { |
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46 while (SDL_PollEvent (&event)) { |
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47 switch (event.type) { |
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48 case SDL_JOYAXISMOTION: |
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49 printf ("Joystick %d axis %d value: %d\n", |
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50 event.jaxis.which, |
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51 event.jaxis.axis, event.jaxis.value); |
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52 break; |
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53 case SDL_JOYHATMOTION: |
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54 printf ("Joystick %d hat %d value:", |
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55 event.jhat.which, event.jhat.hat); |
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56 if (event.jhat.value == SDL_HAT_CENTERED) |
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57 printf (" centered"); |
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58 if (event.jhat.value & SDL_HAT_UP) |
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59 printf (" up"); |
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60 if (event.jhat.value & SDL_HAT_RIGHT) |
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61 printf (" right"); |
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62 if (event.jhat.value & SDL_HAT_DOWN) |
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63 printf (" down"); |
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64 if (event.jhat.value & SDL_HAT_LEFT) |
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65 printf (" left"); |
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66 printf ("\n"); |
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67 break; |
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68 case SDL_JOYBALLMOTION: |
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69 printf ("Joystick %d ball %d delta: (%d,%d)\n", |
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70 event.jball.which, |
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71 event.jball.ball, event.jball.xrel, event.jball.yrel); |
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72 break; |
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73 case SDL_JOYBUTTONDOWN: |
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74 printf ("Joystick %d button %d down\n", |
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75 event.jbutton.which, event.jbutton.button); |
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76 break; |
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77 case SDL_JOYBUTTONUP: |
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78 printf ("Joystick %d button %d up\n", |
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79 event.jbutton.which, event.jbutton.button); |
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80 break; |
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81 case SDL_KEYDOWN: |
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82 if (event.key.keysym.sym != SDLK_ESCAPE) { |
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83 break; |
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84 } |
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85 /* Fall through to signal quit */ |
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86 case SDL_QUIT: |
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87 done = 1; |
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88 break; |
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89 default: |
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90 break; |
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91 } |
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92 } |
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93 /* Update visual joystick state */ |
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94 for (i = 0; i < SDL_JoystickNumButtons (joystick); ++i) { |
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95 SDL_Rect area; |
0 | 96 |
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97 area.x = i * 34; |
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98 area.y = SCREEN_HEIGHT - 34; |
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99 area.w = 32; |
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100 area.h = 32; |
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101 if (SDL_JoystickGetButton (joystick, i) == SDL_PRESSED) { |
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102 SDL_FillRect (screen, &area, 0xFFFF); |
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103 } else { |
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104 SDL_FillRect (screen, &area, 0x0000); |
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105 } |
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106 SDL_UpdateRects (screen, 1, &area); |
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107 } |
0 | 108 |
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109 for (i = 0; |
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110 i < SDL_JoystickNumAxes (joystick) / 2 |
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111 && i < SDL_arraysize (axis_area); ++i) { |
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112 /* Erase previous axes */ |
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113 SDL_FillRect (screen, &axis_area[i][draw], 0x0000); |
0 | 114 |
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115 /* Draw the X/Y axis */ |
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116 draw = !draw; |
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117 x = (((int) SDL_JoystickGetAxis (joystick, i * 2 + 0)) + 32768); |
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118 x *= SCREEN_WIDTH; |
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119 x /= 65535; |
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120 if (x < 0) { |
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121 x = 0; |
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122 } else if (x > (SCREEN_WIDTH - 16)) { |
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123 x = SCREEN_WIDTH - 16; |
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124 } |
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125 y = (((int) SDL_JoystickGetAxis (joystick, i * 2 + 1)) + 32768); |
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126 y *= SCREEN_HEIGHT; |
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127 y /= 65535; |
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128 if (y < 0) { |
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129 y = 0; |
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130 } else if (y > (SCREEN_HEIGHT - 16)) { |
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131 y = SCREEN_HEIGHT - 16; |
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132 } |
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133 axis_area[i][draw].x = (Sint16) x; |
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134 axis_area[i][draw].y = (Sint16) y; |
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135 axis_area[i][draw].w = 16; |
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136 axis_area[i][draw].h = 16; |
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137 SDL_FillRect (screen, &axis_area[i][draw], 0xFFFF); |
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138 |
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139 SDL_UpdateRects (screen, 2, axis_area[i]); |
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140 } |
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141 } |
0 | 142 } |
143 | |
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144 int |
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145 main (int argc, char *argv[]) |
0 | 146 { |
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147 const char *name; |
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148 int i; |
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149 SDL_Joystick *joystick; |
0 | 150 |
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151 /* Initialize SDL (Note: video is required to start event loop) */ |
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152 if (SDL_Init (SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) { |
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153 fprintf (stderr, "Couldn't initialize SDL: %s\n", SDL_GetError ()); |
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154 exit (1); |
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155 } |
0 | 156 |
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157 /* Print information about the joysticks */ |
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158 printf ("There are %d joysticks attached\n", SDL_NumJoysticks ()); |
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159 for (i = 0; i < SDL_NumJoysticks (); ++i) { |
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160 name = SDL_JoystickName (i); |
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161 printf ("Joystick %d: %s\n", i, name ? name : "Unknown Joystick"); |
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162 } |
0 | 163 |
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164 if (argv[1]) { |
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165 joystick = SDL_JoystickOpen (atoi (argv[1])); |
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166 if (joystick == NULL) { |
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167 printf ("Couldn't open joystick %d: %s\n", atoi (argv[1]), |
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168 SDL_GetError ()); |
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169 } else { |
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170 WatchJoystick (joystick); |
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171 SDL_JoystickClose (joystick); |
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172 } |
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173 } |
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174 SDL_QuitSubSystem (SDL_INIT_VIDEO | SDL_INIT_JOYSTICK); |
0 | 175 |
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176 return (0); |
0 | 177 } |