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annotate include/SDL_events.h @ 3647:c5925cd41955

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First pass at Ryan's assertion code, minor tweaks to come.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 13 Jan 2010 06:47:17 +0000
parents 6bb9952d5029
children 64ce267332c6
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 /**
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24 * \file SDL_events.h
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25 *
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26 * Include file for SDL event handling.
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27 */
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28
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29 #ifndef _SDL_events_h
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30 #define _SDL_events_h
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31
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32 #include "SDL_stdinc.h"
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33 #include "SDL_error.h"
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34 #include "SDL_video.h"
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35 #include "SDL_keyboard.h"
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36 #include "SDL_mouse.h"
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37 #include "SDL_joystick.h"
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38 #include "SDL_quit.h"
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39
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40 #include "begin_code.h"
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41 /* Set up for C function definitions, even when using C++ */
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42 #ifdef __cplusplus
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43 /* *INDENT-OFF* */
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44 extern "C" {
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45 /* *INDENT-ON* */
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46 #endif
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47
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48 /* General keyboard/mouse state definitions */
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49 #define SDL_RELEASED 0
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50 #define SDL_PRESSED 1
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51
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52 /**
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53 * \brief The types of events that can be delivered.
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54 */
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55 typedef enum
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56 {
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57 SDL_NOEVENT = 0, /**< Unused (do not remove) */
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58 SDL_WINDOWEVENT, /**< Window state change */
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59 SDL_KEYDOWN, /**< Keys pressed */
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60 SDL_KEYUP, /**< Keys released */
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61 SDL_TEXTEDITING, /**< Keyboard text editing (composition) */
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62 SDL_TEXTINPUT, /**< Keyboard text input */
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63 SDL_MOUSEMOTION, /**< Mouse moved */
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64 SDL_MOUSEBUTTONDOWN, /**< Mouse button pressed */
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65 SDL_MOUSEBUTTONUP, /**< Mouse button released */
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66 SDL_MOUSEWHEEL, /**< Mouse wheel motion */
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67 SDL_JOYAXISMOTION, /**< Joystick axis motion */
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68 SDL_JOYBALLMOTION, /**< Joystick trackball motion */
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69 SDL_JOYHATMOTION, /**< Joystick hat position change */
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70 SDL_JOYBUTTONDOWN, /**< Joystick button pressed */
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71 SDL_JOYBUTTONUP, /**< Joystick button released */
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72 SDL_QUIT, /**< User-requested quit */
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73 SDL_SYSWMEVENT, /**< System specific event */
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74 SDL_PROXIMITYIN, /**< Proximity In event */
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75 SDL_PROXIMITYOUT, /**< Proximity Out event */
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76 SDL_EVENT_RESERVED1, /**< Reserved for future use... */
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77 SDL_EVENT_RESERVED2, /**< Reserved for future use... */
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78 SDL_EVENT_RESERVED3, /**< Reserved for future use... */
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79 /** Events ::SDL_USEREVENT through ::SDL_MAXEVENTS-1 are for your use */
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80 SDL_USEREVENT = 24,
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81 /**
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82 * This last event is only for bounding internal arrays
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83 * It is the number of bits in the event mask datatype -- Uint32
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84 */
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85 SDL_NUMEVENTS = 32
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86 } SDL_EventType;
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87
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88 /*@{*/
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89 #define SDL_EVENTMASK(X) (1<<(X))
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90 /**
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91 * \brief Predefined event masks
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92 */
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93 typedef enum
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94 {
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95 SDL_WINDOWEVENTMASK = SDL_EVENTMASK(SDL_WINDOWEVENT),
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96 SDL_KEYDOWNMASK = SDL_EVENTMASK(SDL_KEYDOWN),
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97 SDL_KEYUPMASK = SDL_EVENTMASK(SDL_KEYUP),
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98 SDL_KEYEVENTMASK = SDL_EVENTMASK(SDL_KEYDOWN) | SDL_EVENTMASK(SDL_KEYUP),
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99 SDL_TEXTEDITINGMASK = SDL_EVENTMASK(SDL_TEXTEDITING),
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100 SDL_TEXTINPUTMASK = SDL_EVENTMASK(SDL_TEXTINPUT),
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101 SDL_MOUSEMOTIONMASK = SDL_EVENTMASK(SDL_MOUSEMOTION),
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102 SDL_MOUSEBUTTONDOWNMASK = SDL_EVENTMASK(SDL_MOUSEBUTTONDOWN),
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103 SDL_MOUSEBUTTONUPMASK = SDL_EVENTMASK(SDL_MOUSEBUTTONUP),
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104 SDL_MOUSEWHEELMASK = SDL_EVENTMASK(SDL_MOUSEWHEEL),
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105 SDL_MOUSEEVENTMASK = SDL_EVENTMASK(SDL_MOUSEMOTION) |
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106 SDL_EVENTMASK(SDL_MOUSEBUTTONDOWN) | SDL_EVENTMASK(SDL_MOUSEBUTTONUP),
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107 SDL_JOYAXISMOTIONMASK = SDL_EVENTMASK(SDL_JOYAXISMOTION),
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108 SDL_JOYBALLMOTIONMASK = SDL_EVENTMASK(SDL_JOYBALLMOTION),
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109 SDL_JOYHATMOTIONMASK = SDL_EVENTMASK(SDL_JOYHATMOTION),
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110 SDL_JOYBUTTONDOWNMASK = SDL_EVENTMASK(SDL_JOYBUTTONDOWN),
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111 SDL_JOYBUTTONUPMASK = SDL_EVENTMASK(SDL_JOYBUTTONUP),
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112 SDL_JOYEVENTMASK = SDL_EVENTMASK(SDL_JOYAXISMOTION) |
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113 SDL_EVENTMASK(SDL_JOYBALLMOTION) |
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114 SDL_EVENTMASK(SDL_JOYHATMOTION) |
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115 SDL_EVENTMASK(SDL_JOYBUTTONDOWN) | SDL_EVENTMASK(SDL_JOYBUTTONUP),
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116 SDL_QUITMASK = SDL_EVENTMASK(SDL_QUIT),
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117 SDL_SYSWMEVENTMASK = SDL_EVENTMASK(SDL_SYSWMEVENT),
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118 SDL_PROXIMITYINMASK = SDL_EVENTMASK(SDL_PROXIMITYIN),
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119 SDL_PROXIMITYOUTMASK = SDL_EVENTMASK(SDL_PROXIMITYOUT)
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120 } SDL_EventMask;
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121 #define SDL_ALLEVENTS 0xFFFFFFFF
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122 /*@}*/
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123
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124 /**
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125 * \brief Window state change event data (event.window.*)
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126 */
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127 typedef struct SDL_WindowEvent
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128 {
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129 Uint8 type; /**< ::SDL_WINDOWEVENT */
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130 SDL_WindowID windowID; /**< The associated window */
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131 Uint8 event; /**< ::SDL_WindowEventID */
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132 int data1; /**< event dependent data */
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133 int data2; /**< event dependent data */
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134 } SDL_WindowEvent;
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135
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136 /**
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137 * \brief Keyboard button event structure (event.key.*)
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138 */
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139 typedef struct SDL_KeyboardEvent
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140 {
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141 Uint8 type; /**< ::SDL_KEYDOWN or ::SDL_KEYUP */
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142 SDL_WindowID windowID; /**< The window with keyboard focus, if any */
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143 Uint8 which; /**< The keyboard device index */
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144 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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145 SDL_keysym keysym; /**< The key that was pressed or released */
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146 } SDL_KeyboardEvent;
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147
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148 #define SDL_TEXTEDITINGEVENT_TEXT_SIZE (32)
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149 /**
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150 * \brief Keyboard text editing event structure (event.edit.*)
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151 */
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152 typedef struct SDL_TextEditingEvent
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153 {
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154 Uint8 type; /**< ::SDL_TEXTEDITING */
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155 char text[SDL_TEXTEDITINGEVENT_TEXT_SIZE]; /**< The editing text */
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156 int start; /**< The start cursor of selected editing text */
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157 int length; /**< The length of selected editing text */
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158 } SDL_TextEditingEvent;
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159
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160
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161 #define SDL_TEXTINPUTEVENT_TEXT_SIZE (32)
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162 /**
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163 * \brief Keyboard text input event structure (event.text.*)
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164 */
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165 typedef struct SDL_TextInputEvent
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166 {
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167 Uint8 type; /**< ::SDL_TEXTINPUT */
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168 SDL_WindowID windowID; /**< The window with keyboard focus, if any */
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169 Uint8 which; /**< The keyboard device index */
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170 char text[SDL_TEXTINPUTEVENT_TEXT_SIZE]; /**< The input text */
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171 } SDL_TextInputEvent;
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172
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173 /**
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174 * \brief Mouse motion event structure (event.motion.*)
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175 */
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176 typedef struct SDL_MouseMotionEvent
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177 {
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178 Uint8 type; /**< ::SDL_MOUSEMOTION */
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179 SDL_WindowID windowID; /**< The window with mouse focus, if any */
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180 Uint8 which; /**< The mouse device index */
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181 Uint8 state; /**< The current button state */
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182 int x; /**< X coordinate, relative to window */
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183 int y; /**< Y coordinate, relative to window */
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184 int z; /**< Z coordinate, for future use */
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185 int pressure; /**< Pressure reported by tablets */
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186 int pressure_max; /**< Maximum value of the pressure reported by the device */
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187 int pressure_min; /**< Minimum value of the pressure reported by the device */
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188 int rotation; /**< For future use */
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189 int tilt_x; /**< For future use */
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190 int tilt_y; /**< For future use */
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191 int cursor; /**< The cursor being used in the event */
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192 int xrel; /**< The relative motion in the X direction */
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193 int yrel; /**< The relative motion in the Y direction */
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194 } SDL_MouseMotionEvent;
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195
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196 /**
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197 * \brief Mouse button event structure (event.button.*)
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198 */
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199 typedef struct SDL_MouseButtonEvent
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200 {
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201 Uint8 type; /**< ::SDL_MOUSEBUTTONDOWN or ::SDL_MOUSEBUTTONUP */
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202 SDL_WindowID windowID; /**< The window with mouse focus, if any */
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203 Uint8 which; /**< The mouse device index */
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204 Uint8 button; /**< The mouse button index */
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205 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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206 int x; /**< X coordinate, relative to window */
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207 int y; /**< Y coordinate, relative to window */
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208 } SDL_MouseButtonEvent;
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209
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210 /**
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211 * \brief Mouse wheel event structure (event.wheel.*)
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212 */
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213 typedef struct SDL_MouseWheelEvent
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214 {
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215 Uint8 type; /**< ::SDL_MOUSEWHEEL */
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216 SDL_WindowID windowID; /**< The window with mouse focus, if any */
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217 Uint8 which; /**< The mouse device index */
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218 int x; /**< The amount scrolled horizontally */
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219 int y; /**< The amount scrolled vertically */
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220 } SDL_MouseWheelEvent;
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221
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222 /**
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223 * \brief Joystick axis motion event structure (event.jaxis.*)
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224 */
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225 typedef struct SDL_JoyAxisEvent
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226 {
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227 Uint8 type; /**< ::SDL_JOYAXISMOTION */
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228 Uint8 which; /**< The joystick device index */
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229 Uint8 axis; /**< The joystick axis index */
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230 int value; /**< The axis value (range: -32768 to 32767) */
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231 } SDL_JoyAxisEvent;
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232
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233 /**
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234 * \brief Joystick trackball motion event structure (event.jball.*)
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235 */
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236 typedef struct SDL_JoyBallEvent
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237 {
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238 Uint8 type; /**< ::SDL_JOYBALLMOTION */
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239 Uint8 which; /**< The joystick device index */
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240 Uint8 ball; /**< The joystick trackball index */
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241 int xrel; /**< The relative motion in the X direction */
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242 int yrel; /**< The relative motion in the Y direction */
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243 } SDL_JoyBallEvent;
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244
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245 /**
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246 * \brief Joystick hat position change event structure (event.jhat.*)
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247 */
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248 typedef struct SDL_JoyHatEvent
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249 {
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250 Uint8 type; /**< ::SDL_JOYHATMOTION */
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251 Uint8 which; /**< The joystick device index */
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252 Uint8 hat; /**< The joystick hat index */
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253 Uint8 value; /**< The hat position value.
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254 * \sa ::SDL_HAT_LEFTUP ::SDL_HAT_UP ::SDL_HAT_RIGHTUP
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255 * \sa ::SDL_HAT_LEFT ::SDL_HAT_CENTERED ::SDL_HAT_RIGHT
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256 * \sa ::SDL_HAT_LEFTDOWN ::SDL_HAT_DOWN ::SDL_HAT_RIGHTDOWN
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257 *
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258 * Note that zero means the POV is centered.
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259 */
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260 } SDL_JoyHatEvent;
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261
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262 /**
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263 * \brief Joystick button event structure (event.jbutton.*)
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264 */
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265 typedef struct SDL_JoyButtonEvent
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266 {
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267 Uint8 type; /**< ::SDL_JOYBUTTONDOWN or ::SDL_JOYBUTTONUP */
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268 Uint8 which; /**< The joystick device index */
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269 Uint8 button; /**< The joystick button index */
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270 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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271 } SDL_JoyButtonEvent;
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272
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273 /**
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274 * \brief The "quit requested" event
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275 */
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276 typedef struct SDL_QuitEvent
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277 {
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278 Uint8 type; /**< ::SDL_QUIT */
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279 } SDL_QuitEvent;
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280
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281 /**
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282 * \brief A user-defined event type (event.user.*)
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283 */
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284 typedef struct SDL_UserEvent
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285 {
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286 Uint8 type; /**< ::SDL_USEREVENT through ::SDL_NUMEVENTS-1 */
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287 SDL_WindowID windowID; /**< The associated window if any*/
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288 int code; /**< User defined event code */
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289 void *data1; /**< User defined data pointer */
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290 void *data2; /**< User defined data pointer */
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291 } SDL_UserEvent;
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292
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293 struct SDL_SysWMmsg;
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294 typedef struct SDL_SysWMmsg SDL_SysWMmsg;
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295
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296 /**
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297 * \brief A video driver dependent system event (event.syswm.*)
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298 *
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299 * \note If you want to use this event, you should include SDL_syswm.h.
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300 */
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301 typedef struct SDL_SysWMEvent
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302 {
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303 Uint8 type; /**< ::SDL_SYSWMEVENT */
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304 SDL_SysWMmsg *msg; /**< driver dependent data, defined in SDL_syswm.h */
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305 } SDL_SysWMEvent;
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306
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307 typedef struct SDL_ProximityEvent
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308 {
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309 Uint8 type;
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310 SDL_WindowID windowID; /**< The associated window */
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311 Uint8 which;
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312 int cursor;
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313 int x;
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314 int y;
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315 } SDL_ProximityEvent;
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316
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317 #ifndef SDL_NO_COMPAT
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318 /**
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319 * \addtogroup Compatibility
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320 */
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321 /*@{*/
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322
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323 /**
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324 * \name Typedefs for backwards compatibility
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325 */
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326 /*@{*/
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327 typedef struct SDL_ActiveEvent
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328 {
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329 Uint8 type;
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330 Uint8 gain;
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331 Uint8 state;
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332 } SDL_ActiveEvent;
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333
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334 typedef struct SDL_ResizeEvent
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335 {
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336 Uint8 type;
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337 int w;
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338 int h;
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339 } SDL_ResizeEvent;
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340 /*@}*/
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341
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342 /*@}*//*Compatibility*/
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343 #endif
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344
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345 /**
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346 * \brief General event structure
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347 */
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348 typedef union SDL_Event
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349 {
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350 Uint8 type; /**< Event type, shared with all events */
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351 SDL_WindowEvent window; /**< Window event data */
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352 SDL_KeyboardEvent key; /**< Keyboard event data */
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353 SDL_TextEditingEvent edit; /**< Text editing event data */
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354 SDL_TextInputEvent text; /**< Text input event data */
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355 SDL_MouseMotionEvent motion; /**< Mouse motion event data */
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356 SDL_MouseButtonEvent button; /**< Mouse button event data */
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357 SDL_MouseWheelEvent wheel; /**< Mouse wheel event data */
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358 SDL_JoyAxisEvent jaxis; /**< Joystick axis event data */
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359 SDL_JoyBallEvent jball; /**< Joystick ball event data */
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360 SDL_JoyHatEvent jhat; /**< Joystick hat event data */
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361 SDL_JoyButtonEvent jbutton; /**< Joystick button event data */
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362 SDL_QuitEvent quit; /**< Quit request event data */
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363 SDL_UserEvent user; /**< Custom event data */
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364 SDL_SysWMEvent syswm; /**< System dependent window event data */
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365 SDL_ProximityEvent proximity; /**< Proximity In or Out event */
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366
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367 /** Temporarily here for backwards compatibility */
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368 /*@{*/
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369 #ifndef SDL_NO_COMPAT
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370 SDL_ActiveEvent active;
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371 SDL_ResizeEvent resize;
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372 #endif
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373 /*@}*/
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374 } SDL_Event;
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375
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376
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377 /* Function prototypes */
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378
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379 /**
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380 * Pumps the event loop, gathering events from the input devices.
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381 *
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382 * This function updates the event queue and internal input device state.
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383 *
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384 * This should only be run in the thread that sets the video mode.
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385 */
337
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386 extern DECLSPEC void SDLCALL SDL_PumpEvents(void);
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387
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388 /*@{*/
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389 typedef enum
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390 {
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391 SDL_ADDEVENT,
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392 SDL_PEEKEVENT,
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393 SDL_GETEVENT
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394 } SDL_eventaction;
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395
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396 /**
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397 * Checks the event queue for messages and optionally returns them.
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398 *
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399 * If \c action is ::SDL_ADDEVENT, up to \c numevents events will be added to
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400 * the back of the event queue.
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401 *
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402 * If \c action is ::SDL_PEEKEVENT, up to \c numevents events at the front
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403 * of the event queue, matching \c mask, will be returned and will not
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404 * be removed from the queue.
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405 *
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406 * If \c action is ::SDL_GETEVENT, up to \c numevents events at the front
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407 * of the event queue, matching \c mask, will be returned and will be
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408 * removed from the queue.
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409 *
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410 * \return The number of events actually stored, or -1 if there was an error.
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411 *
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412 * This function is thread-safe.
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413 */
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414 extern DECLSPEC int SDLCALL SDL_PeepEvents(SDL_Event * events, int numevents,
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415 SDL_eventaction action,
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416 Uint32 mask);
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417 /*@}*/
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418
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419 /**
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420 * Checks to see if certain event types are in the event queue.
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421 */
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422 extern DECLSPEC SDL_bool SDLCALL SDL_HasEvent(Uint32 mask);
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423
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424 /**
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425 * \brief Polls for currently pending events.
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426 *
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427 * \return 1 if there are any pending events, or 0 if there are none available.
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428 *
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429 * \param event If not NULL, the next event is removed from the queue and
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430 * stored in that area.
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431 */
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432 extern DECLSPEC int SDLCALL SDL_PollEvent(SDL_Event * event);
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433
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434 /**
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435 * \brief Waits indefinitely for the next available event.
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436 *
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437 * \return 1, or 0 if there was an error while waiting for events.
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438 *
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439 * \param event If not NULL, the next event is removed from the queue and
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440 * stored in that area.
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441 */
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442 extern DECLSPEC int SDLCALL SDL_WaitEvent(SDL_Event * event);
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443
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444 /**
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445 * \brief Waits until the specified timeout (in milliseconds) for the next
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446 * available event.
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447 *
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448 * \return 1, or 0 if there was an error while waiting for events.
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449 *
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450 * \param event If not NULL, the next event is removed from the queue and
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451 * stored in that area.
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452 */
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453 extern DECLSPEC int SDLCALL SDL_WaitEventTimeout(SDL_Event * event,
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454 int timeout);
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455
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456 /**
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457 * \brief Add an event to the event queue.
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458 *
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459 * \return 1 on success, 0 if the event was filtered, or -1 if the event queue
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460 * was full or there was some other error.
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461 */
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462 extern DECLSPEC int SDLCALL SDL_PushEvent(SDL_Event * event);
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463
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464 typedef int (SDLCALL * SDL_EventFilter) (void *userdata, SDL_Event * event);
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465
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466 /**
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467 * Sets up a filter to process all events before they change internal state and
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468 * are posted to the internal event queue.
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469 *
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470 * The filter is protypted as:
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471 * \code
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472 * int SDL_EventFilter(void *userdata, SDL_Event * event);
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473 * \endcode
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474 *
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475 * If the filter returns 1, then the event will be added to the internal queue.
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476 * If it returns 0, then the event will be dropped from the queue, but the
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477 * internal state will still be updated. This allows selective filtering of
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478 * dynamically arriving events.
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479 *
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480 * \warning Be very careful of what you do in the event filter function, as
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481 * it may run in a different thread!
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482 *
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483 * There is one caveat when dealing with the ::SDL_QUITEVENT event type. The
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484 * event filter is only called when the window manager desires to close the
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485 * application window. If the event filter returns 1, then the window will
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486 * be closed, otherwise the window will remain open if possible.
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487 *
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488 * If the quit event is generated by an interrupt signal, it will bypass the
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489 * internal queue and be delivered to the application at the next event poll.
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490 */
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491 extern DECLSPEC void SDLCALL SDL_SetEventFilter(SDL_EventFilter filter,
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492 void *userdata);
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493
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494 /**
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495 * Return the current event filter - can be used to "chain" filters.
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496 * If there is no event filter set, this function returns SDL_FALSE.
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497 */
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498 extern DECLSPEC SDL_bool SDLCALL SDL_GetEventFilter(SDL_EventFilter * filter,
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499 void **userdata);
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500
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501 /**
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502 * Run the filter function on the current event queue, removing any
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503 * events for which the filter returns 0.
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504 */
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505 extern DECLSPEC void SDLCALL SDL_FilterEvents(SDL_EventFilter filter,
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506 void *userdata);
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507
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508 /*@{*/
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509 #define SDL_QUERY -1
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510 #define SDL_IGNORE 0
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511 #define SDL_DISABLE 0
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512 #define SDL_ENABLE 1
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513
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514 /**
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515 * This function allows you to set the state of processing certain events.
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516 * - If \c state is set to ::SDL_IGNORE, that event will be automatically
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517 * dropped from the event queue and will not event be filtered.
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518 * - If \c state is set to ::SDL_ENABLE, that event will be processed
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519 * normally.
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520 * - If \c state is set to ::SDL_QUERY, SDL_EventState() will return the
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521 * current processing state of the specified event.
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522 */
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523 extern DECLSPEC Uint8 SDLCALL SDL_EventState(Uint8 type, int state);
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524 /*@}*/
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525
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526 /* Ends C function definitions when using C++ */
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527 #ifdef __cplusplus
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528 /* *INDENT-OFF* */
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529 }
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530 /* *INDENT-ON* */
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531 #endif
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532 #include "close_code.h"
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533
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534 #endif /* _SDL_events_h */
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535
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
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536 /* vi: set ts=4 sw=4 expandtab: */