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annotate src/video/ataricommon/SDL_ikbdevents.c @ 1082:48436ffdf677

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Avoid generating multiple key press/release messages for the same key
author Patrice Mandin <patmandin@gmail.com>
date Wed, 29 Jun 2005 20:32:46 +0000
parents b8d311d90021
children a55ac374271c
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /*
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29 * Atari keyboard events manager, using hardware IKBD
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30 *
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31 * Patrice Mandin
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32 */
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33
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34 #include <string.h>
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35
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36 /* Mint includes */
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37 #include <mint/osbind.h>
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38
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39 #include "SDL.h"
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40 #include "SDL_sysevents.h"
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41 #include "SDL_events_c.h"
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42
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43 #include "SDL_atarikeys.h"
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44 #include "SDL_ikbdinterrupt_s.h"
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45
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46 /* Special keys state */
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47 enum {
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48 K_RSHIFT=0,
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49 K_LSHIFT,
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50 K_CTRL,
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51 K_ALT,
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52 K_CAPSLOCK,
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53 K_CLRHOME,
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54 K_INSERT
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55 };
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56
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57 #define ATARIBIOS_MAXKEYS 128
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58
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59 #define KEY_PRESSED 0xff
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60 #define KEY_UNDEFINED 0x80
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61 #define KEY_RELEASED 0x00
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62
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63 /* The translation tables from a console scancode to a SDL keysym */
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64 #define KT_NOCHANGE -1
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65
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66 enum {
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67 KT_UNSHIFT=0,
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68 KT_SHIFT=1,
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69 KT_CAPS=2
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70 };
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71
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72 static Uint16 atari_prevmouseb; /* save state of mouse buttons */
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73 static int caps_state; /* caps lock state */
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74 _KEYTAB *curtables;
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75 static unsigned char *tab_unshift, *tab_shift, *tab_caps;
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76 static SDLKey keymap[ATARIBIOS_MAXKEYS];
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77
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78 static SDL_keysym *TranslateKey(int scancode, int numkeytable, SDL_keysym *keysym);
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79
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80 void AtariIkbd_InitOSKeymap(_THIS)
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81 {
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82 int i;
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83
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84 memset(SDL_AtariIkbd_keyboard, KEY_UNDEFINED, ATARIBIOS_MAXKEYS);
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85
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86 /* Initialize keymap */
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87 for ( i=0; i<sizeof(keymap); i++ )
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88 keymap[i] = SDLK_UNKNOWN;
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89
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90 /* Functions keys */
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91 for ( i = 0; i<10; i++ )
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92 keymap[SCANCODE_F1 + i] = SDLK_F1+i;
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93
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94 /* Cursor keypad */
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95 keymap[SCANCODE_HELP] = SDLK_HELP;
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96 keymap[SCANCODE_UNDO] = SDLK_UNDO;
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97 keymap[SCANCODE_INSERT] = SDLK_INSERT;
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98 keymap[SCANCODE_CLRHOME] = SDLK_HOME;
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99 keymap[SCANCODE_UP] = SDLK_UP;
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100 keymap[SCANCODE_DOWN] = SDLK_DOWN;
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101 keymap[SCANCODE_RIGHT] = SDLK_RIGHT;
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102 keymap[SCANCODE_LEFT] = SDLK_LEFT;
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103
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104 /* Special keys */
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105 keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE;
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106 keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE;
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107 keymap[SCANCODE_TAB] = SDLK_TAB;
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108 keymap[SCANCODE_ENTER] = SDLK_RETURN;
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109 keymap[SCANCODE_DELETE] = SDLK_DELETE;
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110 keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL;
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111 keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT;
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112 keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT;
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113 keymap[SCANCODE_LEFTALT] = SDLK_LALT;
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114 keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK;
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115
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116 /* Read XBIOS tables for scancode -> ascii translation */
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117 curtables=Keytbl(KT_NOCHANGE, KT_NOCHANGE, KT_NOCHANGE);
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118 tab_unshift=curtables->unshift;
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119 tab_shift=curtables->shift;
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120 tab_caps=curtables->caps;
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121
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122 /* Set Caps lock initial state */
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123 caps_state=(Kbshift(-1) & (1<<K_CAPSLOCK));
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124
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125 /* Now install our handler */
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126 SDL_AtariIkbd_mouseb = SDL_AtariIkbd_mousex = SDL_AtariIkbd_mousey = 0;
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127 atari_prevmouseb = 0;
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128
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129 Supexec(SDL_AtariIkbdInstall);
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130 }
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131
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132 static int atari_GetButton(int button)
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133 {
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134 switch(button)
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135 {
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136 case 0:
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137 return SDL_BUTTON_RIGHT;
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138 break;
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139 case 1:
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140 default:
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141 return SDL_BUTTON_LEFT;
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142 break;
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143 }
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144 }
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145
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146 void AtariIkbd_PumpEvents(_THIS)
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147 {
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148 int i;
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149 SDL_keysym keysym;
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150 int specialkeys;
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151
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152 /*--- Send keyboard events ---*/
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153
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154 /* Update caps lock state */
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155 if (SDL_AtariIkbd_keyboard[SCANCODE_CAPSLOCK]==KEY_PRESSED) {
281
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156 caps_state ^= 1;
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157 }
281
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158
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159 /* Choose the translation table */
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160 specialkeys=KT_UNSHIFT;
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161 if ((SDL_AtariIkbd_keyboard[SCANCODE_LEFTSHIFT]==KEY_PRESSED)
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162 || (SDL_AtariIkbd_keyboard[SCANCODE_RIGHTSHIFT]==KEY_PRESSED))
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163 {
281
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164 specialkeys = KT_SHIFT;
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165 }
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166 if (caps_state) {
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167 specialkeys = KT_CAPS;
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168 }
281
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169
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170 /* Now generate events */
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171 for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
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172 /* Key pressed ? */
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173 if (SDL_AtariIkbd_keyboard[i]==KEY_PRESSED) {
281
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174 SDL_PrivateKeyboard(SDL_PRESSED, TranslateKey(i, specialkeys, &keysym));
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175 SDL_AtariIkbd_keyboard[i]=KEY_UNDEFINED;
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176 }
281
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177
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178 /* Key released ? */
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179 if (SDL_AtariIkbd_keyboard[i]==KEY_RELEASED) {
281
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180 SDL_PrivateKeyboard(SDL_RELEASED, TranslateKey(i, specialkeys, &keysym));
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181 SDL_AtariIkbd_keyboard[i]=KEY_UNDEFINED;
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182 }
281
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183 }
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184
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185 /*--- Send mouse events ---*/
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186
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187 /* Mouse motion ? */
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188 if (SDL_AtariIkbd_mousex || SDL_AtariIkbd_mousey) {
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189 SDL_PrivateMouseMotion(0, 1, SDL_AtariIkbd_mousex, SDL_AtariIkbd_mousey);
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190 SDL_AtariIkbd_mousex = SDL_AtariIkbd_mousey = 0;
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191 }
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192
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193 /* Mouse button ? */
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194 if (SDL_AtariIkbd_mouseb != atari_prevmouseb) {
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195 for (i=0;i<2;i++) {
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196 int curbutton, prevbutton;
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197
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198 curbutton = SDL_AtariIkbd_mouseb & (1<<i);
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199 prevbutton = atari_prevmouseb & (1<<i);
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200
331
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201 if (curbutton && !prevbutton) {
281
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202 SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
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203 }
331
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204 if (!curbutton && prevbutton) {
281
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205 SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
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206 }
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207 }
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208 atari_prevmouseb = SDL_AtariIkbd_mouseb;
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209 }
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210 }
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211
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212 static SDL_keysym *TranslateKey(int scancode, int numkeytable, SDL_keysym *keysym)
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213 {
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214 unsigned char asciicode;
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215
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216 /* Set the keysym information */
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217 keysym->scancode = scancode;
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218
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219 asciicode=0;
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220 switch(numkeytable) {
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221 case KT_UNSHIFT:
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222 asciicode=tab_unshift[scancode];
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223 break;
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224 case KT_SHIFT:
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225 asciicode=tab_shift[scancode];
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226 break;
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227 case KT_CAPS:
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228 asciicode=tab_caps[scancode];
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229 break;
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230 }
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231
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232 if (asciicode)
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233 keysym->sym = asciicode;
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234 else
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235 keysym->sym = keymap[scancode];
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236
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237 keysym->mod = KMOD_NONE;
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238 keysym->unicode = 0;
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239
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240 return(keysym);
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241 }
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242
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243 void AtariIkbd_ShutdownEvents(void)
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244 {
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245 Supexec(SDL_AtariIkbdUninstall);
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246 }