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annotate test/checkkeys.c @ 1662:782fd950bd46 SDL-1.3

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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>
date Sun, 28 May 2006 13:04:16 +0000
parents 7c7ddaf195bf
children 4da1ee79c9af
rev   line source
0
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1
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2 /* Simple program: Loop, watching keystrokes
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3 Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to
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4 pump the event loop and catch keystrokes.
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5 */
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6
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10
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11 #include "SDL.h"
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12
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13 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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14 static void
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15 quit (int rc)
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16 {
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17 SDL_Quit ();
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18 exit (rc);
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19 }
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20
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21 static void
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22 print_modifiers (void)
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23 {
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24 int mod;
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25 printf (" modifiers:");
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26 mod = SDL_GetModState ();
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27 if (!mod) {
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28 printf (" (none)");
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29 return;
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30 }
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31 if (mod & KMOD_LSHIFT)
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32 printf (" LSHIFT");
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33 if (mod & KMOD_RSHIFT)
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34 printf (" RSHIFT");
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35 if (mod & KMOD_LCTRL)
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36 printf (" LCTRL");
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37 if (mod & KMOD_RCTRL)
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38 printf (" RCTRL");
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39 if (mod & KMOD_LALT)
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40 printf (" LALT");
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41 if (mod & KMOD_RALT)
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42 printf (" RALT");
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43 if (mod & KMOD_LMETA)
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44 printf (" LMETA");
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45 if (mod & KMOD_RMETA)
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46 printf (" RMETA");
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47 if (mod & KMOD_NUM)
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48 printf (" NUM");
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49 if (mod & KMOD_CAPS)
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50 printf (" CAPS");
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51 if (mod & KMOD_MODE)
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52 printf (" MODE");
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53 }
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54
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55 static void
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56 PrintKey (SDL_keysym * sym, int pressed)
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57 {
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58 /* Print the keycode, name and state */
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59 if (sym->sym) {
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60 printf ("Key %s: %d-%s ", pressed ? "pressed" : "released",
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61 sym->sym, SDL_GetKeyName (sym->sym));
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62 } else {
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63 printf ("Unknown Key (scancode = %d) %s ", sym->scancode,
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64 pressed ? "pressed" : "released");
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65 }
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66
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67 /* Print the translated character, if one exists */
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68 if (sym->unicode) {
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69 /* Is it a control-character? */
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70 if (sym->unicode < ' ') {
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71 printf (" (^%c)", sym->unicode + '@');
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72 } else {
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73 #ifdef UNICODE
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74 printf (" (%c)", sym->unicode);
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75 #else
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76 /* This is a Latin-1 program, so only show 8-bits */
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77 if (!(sym->unicode & 0xFF00))
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78 printf (" (%c)", sym->unicode);
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79 else
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80 printf (" (0x%X)", sym->unicode);
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81 #endif
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82 }
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83 }
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84 print_modifiers ();
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85 printf ("\n");
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86 }
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87
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88 int
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89 main (int argc, char *argv[])
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90 {
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91 SDL_Event event;
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92 int done;
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93 Uint32 videoflags;
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94
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95 /* Initialize SDL */
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96 if (SDL_Init (SDL_INIT_VIDEO) < 0) {
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97 fprintf (stderr, "Couldn't initialize SDL: %s\n", SDL_GetError ());
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98 return (1);
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99 }
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100
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101 videoflags = SDL_SWSURFACE;
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102 while (argc > 1) {
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103 --argc;
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104 if (argv[argc] && !strcmp (argv[argc], "-fullscreen")) {
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105 videoflags |= SDL_FULLSCREEN;
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106 } else {
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107 fprintf (stderr, "Usage: %s [-fullscreen]\n", argv[0]);
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108 quit (1);
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109 }
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110 }
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111
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112 /* Set 640x480 video mode */
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113 if (SDL_SetVideoMode (640, 480, 0, videoflags) == NULL) {
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114 fprintf (stderr, "Couldn't set 640x480 video mode: %s\n",
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115 SDL_GetError ());
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116 quit (2);
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117 }
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118
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119 /* Enable UNICODE translation for keyboard input */
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120 SDL_EnableUNICODE (1);
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121
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122 /* Enable auto repeat for keyboard input */
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123 SDL_EnableKeyRepeat (SDL_DEFAULT_REPEAT_DELAY,
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124 SDL_DEFAULT_REPEAT_INTERVAL);
0
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125
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126 /* Watch keystrokes */
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127 done = 0;
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128 while (!done) {
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129 /* Check for events */
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130 SDL_WaitEvent (&event);
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131 switch (event.type) {
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132 case SDL_KEYDOWN:
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133 PrintKey (&event.key.keysym, 1);
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134 break;
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135 case SDL_KEYUP:
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136 PrintKey (&event.key.keysym, 0);
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137 break;
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138 case SDL_MOUSEBUTTONDOWN:
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139 /* Any button press quits the app... */
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140 case SDL_QUIT:
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141 done = 1;
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142 break;
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143 default:
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144 break;
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145 }
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146 }
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147
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148 SDL_Quit ();
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149 return (0);
0
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150 }