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annotate test/testjoystick.c @ 3566:07c8339c95c6

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Fixed bug #905 Give the foreign window message proc more control over Windows events. This may need to be adjusted when we add the capability for the app to specify whether it wants SDL to handle input for the window or not.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 15 Dec 2009 09:20:10 +0000
parents f55c87ae336b
children
rev   line source
0
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1
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2 /* Simple program to test the SDL joystick routines */
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3
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4 #include <stdio.h>
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5 #include <stdlib.h>
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6 #include <string.h>
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7
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8 #include "SDL.h"
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9
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10 #ifdef __IPHONEOS__
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11 #define SCREEN_WIDTH 320
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12 #define SCREEN_HEIGHT 480
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13 #else
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14 #define SCREEN_WIDTH 640
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15 #define SCREEN_HEIGHT 480
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16 #endif
0
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17
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18 void
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19 WatchJoystick(SDL_Joystick * joystick)
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20 {
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21 SDL_Surface *screen;
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22 const char *name;
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23 int i, done;
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24 SDL_Event event;
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25 int x, y, draw;
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26 SDL_Rect axis_area[6][2];
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27
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28 /* Set a video mode to display joystick axis position */
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29 screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, 16, 0);
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30 if (screen == NULL) {
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31 fprintf(stderr, "Couldn't set video mode: %s\n", SDL_GetError());
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32 return;
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33 }
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34
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35 /* Print info about the joystick we are watching */
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36 name = SDL_JoystickName(SDL_JoystickIndex(joystick));
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37 printf("Watching joystick %d: (%s)\n", SDL_JoystickIndex(joystick),
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38 name ? name : "Unknown Joystick");
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39 printf("Joystick has %d axes, %d hats, %d balls, and %d buttons\n",
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40 SDL_JoystickNumAxes(joystick), SDL_JoystickNumHats(joystick),
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41 SDL_JoystickNumBalls(joystick), SDL_JoystickNumButtons(joystick));
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42
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43 /* Initialize drawing rectangles */
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44 memset(axis_area, 0, (sizeof axis_area));
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45 draw = 0;
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46
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47 /* Loop, getting joystick events! */
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48 done = 0;
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49 while (!done) {
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50 while (SDL_PollEvent(&event)) {
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51 switch (event.type) {
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52 case SDL_JOYAXISMOTION:
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53 printf("Joystick %d axis %d value: %d\n",
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54 event.jaxis.which,
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55 event.jaxis.axis, event.jaxis.value);
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56 break;
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57 case SDL_JOYHATMOTION:
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58 printf("Joystick %d hat %d value:",
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59 event.jhat.which, event.jhat.hat);
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60 if (event.jhat.value == SDL_HAT_CENTERED)
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61 printf(" centered");
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62 if (event.jhat.value & SDL_HAT_UP)
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63 printf(" up");
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64 if (event.jhat.value & SDL_HAT_RIGHT)
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65 printf(" right");
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66 if (event.jhat.value & SDL_HAT_DOWN)
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67 printf(" down");
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68 if (event.jhat.value & SDL_HAT_LEFT)
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69 printf(" left");
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70 printf("\n");
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71 break;
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72 case SDL_JOYBALLMOTION:
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73 printf("Joystick %d ball %d delta: (%d,%d)\n",
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74 event.jball.which,
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75 event.jball.ball, event.jball.xrel, event.jball.yrel);
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76 break;
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77 case SDL_JOYBUTTONDOWN:
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78 printf("Joystick %d button %d down\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_JOYBUTTONUP:
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82 printf("Joystick %d button %d up\n",
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83 event.jbutton.which, event.jbutton.button);
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84 break;
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85 case SDL_KEYDOWN:
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86 if (event.key.keysym.sym != SDLK_ESCAPE) {
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87 break;
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88 }
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89 /* Fall through to signal quit */
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90 case SDL_QUIT:
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91 done = 1;
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92 break;
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93 default:
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94 break;
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95 }
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96 }
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97 /* Update visual joystick state */
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98 for (i = 0; i < SDL_JoystickNumButtons(joystick); ++i) {
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99 SDL_Rect area;
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100
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101 area.x = i * 34;
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102 area.y = SCREEN_HEIGHT - 34;
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103 area.w = 32;
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104 area.h = 32;
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105 if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) {
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106 SDL_FillRect(screen, &area, 0xFFFF);
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107 } else {
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108 SDL_FillRect(screen, &area, 0x0000);
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109 }
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110 SDL_UpdateRects(screen, 1, &area);
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111 }
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112
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113 for (i = 0;
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114 i < SDL_JoystickNumAxes(joystick) / 2
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115 && i < SDL_arraysize(axis_area); ++i) {
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116 /* Erase previous axes */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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117 SDL_FillRect(screen, &axis_area[i][draw], 0x0000);
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118
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119 /* Draw the X/Y axis */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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120 draw = !draw;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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121 x = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 0)) + 32768);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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122 x *= SCREEN_WIDTH;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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123 x /= 65535;
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124 if (x < 0) {
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125 x = 0;
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126 } else if (x > (SCREEN_WIDTH - 16)) {
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127 x = SCREEN_WIDTH - 16;
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128 }
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129 y = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 1)) + 32768);
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130 y *= SCREEN_HEIGHT;
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131 y /= 65535;
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132 if (y < 0) {
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133 y = 0;
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134 } else if (y > (SCREEN_HEIGHT - 16)) {
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135 y = SCREEN_HEIGHT - 16;
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136 }
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137
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138 axis_area[i][draw].x = (Sint16) x;
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139 axis_area[i][draw].y = (Sint16) y;
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140 axis_area[i][draw].w = 16;
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141 axis_area[i][draw].h = 16;
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142 SDL_FillRect(screen, &axis_area[i][draw], 0xFFFF);
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143
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144 SDL_UpdateRects(screen, 2, axis_area[i]);
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145 }
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146 }
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147 }
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148
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149 int
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150 main(int argc, char *argv[])
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151 {
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152 const char *name;
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153 int i;
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154 SDL_Joystick *joystick;
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155
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156 /* Initialize SDL (Note: video is required to start event loop) */
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157 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) {
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158 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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159 exit(1);
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160 }
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161
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162 /* Print information about the joysticks */
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163 printf("There are %d joysticks attached\n", SDL_NumJoysticks());
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164 for (i = 0; i < SDL_NumJoysticks(); ++i) {
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165 name = SDL_JoystickName(i);
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166 printf("Joystick %d: %s\n", i, name ? name : "Unknown Joystick");
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167 joystick = SDL_JoystickOpen(i);
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168 if (joystick == NULL) {
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169 fprintf(stderr, "SDL_JoystickOpen(%d) failed: %s\n", i,
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170 SDL_GetError());
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171 } else {
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172 printf(" axes: %d\n", SDL_JoystickNumAxes(joystick));
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173 printf(" balls: %d\n", SDL_JoystickNumBalls(joystick));
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174 printf(" hats: %d\n", SDL_JoystickNumHats(joystick));
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175 printf(" buttons: %d\n", SDL_JoystickNumButtons(joystick));
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176 SDL_JoystickClose(joystick);
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177 }
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178 }
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179
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180 if (argv[1]) {
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181 joystick = SDL_JoystickOpen(atoi(argv[1]));
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182 if (joystick == NULL) {
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183 printf("Couldn't open joystick %d: %s\n", atoi(argv[1]),
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184 SDL_GetError());
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185 } else {
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186 WatchJoystick(joystick);
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187 SDL_JoystickClose(joystick);
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188 }
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189 }
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190 SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
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191
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192 return (0);
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193 }