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annotate include/SDL_events.h @ 4562:dc9d77a26388

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author Sam Lantinga <slouken@libsdl.org>
date Wed, 21 Jul 2010 00:00:05 -0700
parents 95352c671a6e
children 0a07d002f10b
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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_FIRSTEVENT = 0, /**< Unused (do not remove) */
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58
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59 /* Application events */
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60 SDL_QUIT = 0x100, /**< User-requested quit */
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61
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62 /* Window events */
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63 SDL_WINDOWEVENT = 0x200, /**< Window state change */
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64 SDL_SYSWMEVENT, /**< System specific event */
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65
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66 /* Keyboard events */
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67 SDL_KEYDOWN = 0x300, /**< Keys pressed */
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68 SDL_KEYUP, /**< Keys released */
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69 SDL_TEXTEDITING, /**< Keyboard text editing (composition) */
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70 SDL_TEXTINPUT, /**< Keyboard text input */
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71
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72 /* Mouse events */
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73 SDL_MOUSEMOTION = 0x400, /**< Mouse moved */
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74 SDL_MOUSEBUTTONDOWN, /**< Mouse button pressed */
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75 SDL_MOUSEBUTTONUP, /**< Mouse button released */
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76 SDL_MOUSEWHEEL, /**< Mouse wheel motion */
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77
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78 /* Tablet or multiple mice input device events */
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79 SDL_INPUTMOTION = 0x500, /**< Input moved */
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80 SDL_INPUTBUTTONDOWN, /**< Input button pressed */
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81 SDL_INPUTBUTTONUP, /**< Input button released */
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82 SDL_INPUTWHEEL, /**< Input wheel motion */
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83 SDL_INPUTPROXIMITYIN, /**< Input pen entered proximity */
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84 SDL_INPUTPROXIMITYOUT, /**< Input pen left proximity */
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85
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86 /* Joystick events */
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87 SDL_JOYAXISMOTION = 0x600, /**< Joystick axis motion */
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88 SDL_JOYBALLMOTION, /**< Joystick trackball motion */
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89 SDL_JOYHATMOTION, /**< Joystick hat position change */
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90 SDL_JOYBUTTONDOWN, /**< Joystick button pressed */
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91 SDL_JOYBUTTONUP, /**< Joystick button released */
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92
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93 /* Clipboard events */
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94 SDL_CLIPBOARDUPDATE = 0x700, /**< The clipboard changed */
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95
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96 /* Obsolete events */
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97 SDL_EVENT_COMPAT1 = 0x7000, /**< SDL 1.2 events for compatibility */
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98 SDL_EVENT_COMPAT2,
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99 SDL_EVENT_COMPAT3,
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100
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101 /** Events ::SDL_USEREVENT through ::SDL_LASTEVENT are for your use,
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102 * and should be allocated with SDL_RegisterEvents()
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103 */
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104 SDL_USEREVENT = 0x8000,
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105
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106 /**
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107 * This last event is only for bounding internal arrays
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108 */
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109 SDL_LASTEVENT = 0xFFFF
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110 } SDL_EventType;
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111
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112 /**
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113 * \brief Window state change event data (event.window.*)
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114 */
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115 typedef struct SDL_WindowEvent
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116 {
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117 Uint32 type; /**< ::SDL_WINDOWEVENT */
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118 Uint32 windowID; /**< The associated window */
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119 Uint8 event; /**< ::SDL_WindowEventID */
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120 Uint8 padding1;
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121 Uint8 padding2;
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122 Uint8 padding3;
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123 int data1; /**< event dependent data */
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124 int data2; /**< event dependent data */
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125 } SDL_WindowEvent;
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126
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127 /**
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128 * \brief Keyboard button event structure (event.key.*)
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129 */
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130 typedef struct SDL_KeyboardEvent
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131 {
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132 Uint32 type; /**< ::SDL_KEYDOWN or ::SDL_KEYUP */
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133 Uint32 windowID; /**< The window with keyboard focus, if any */
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134 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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135 Uint8 repeat; /**< Non-zero if this is a key repeat */
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136 Uint8 padding2;
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137 Uint8 padding3;
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138 SDL_keysym keysym; /**< The key that was pressed or released */
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139 } SDL_KeyboardEvent;
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140
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141 #define SDL_TEXTEDITINGEVENT_TEXT_SIZE (32)
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142 /**
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143 * \brief Keyboard text editing event structure (event.edit.*)
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144 */
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145 typedef struct SDL_TextEditingEvent
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146 {
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147 Uint32 type; /**< ::SDL_TEXTEDITING */
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148 Uint32 windowID; /**< The window with keyboard focus, if any */
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149 char text[SDL_TEXTEDITINGEVENT_TEXT_SIZE]; /**< The editing text */
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150 int start; /**< The start cursor of selected editing text */
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151 int length; /**< The length of selected editing text */
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152 } SDL_TextEditingEvent;
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153
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154
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155 #define SDL_TEXTINPUTEVENT_TEXT_SIZE (32)
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156 /**
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157 * \brief Keyboard text input event structure (event.text.*)
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158 */
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159 typedef struct SDL_TextInputEvent
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160 {
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161 Uint32 type; /**< ::SDL_TEXTINPUT */
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162 Uint32 windowID; /**< The window with keyboard focus, if any */
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163 char text[SDL_TEXTINPUTEVENT_TEXT_SIZE]; /**< The input text */
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164 } SDL_TextInputEvent;
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165
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166 /**
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167 * \brief Mouse motion event structure (event.motion.*)
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168 */
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169 typedef struct SDL_MouseMotionEvent
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170 {
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171 Uint32 type; /**< ::SDL_MOUSEMOTION */
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172 Uint32 windowID; /**< The window with mouse focus, if any */
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173 Uint8 state; /**< The current button state */
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174 Uint8 padding1;
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175 Uint8 padding2;
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176 Uint8 padding3;
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177 int x; /**< X coordinate, relative to window */
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178 int y; /**< Y coordinate, relative to window */
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179 int xrel; /**< The relative motion in the X direction */
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180 int yrel; /**< The relative motion in the Y direction */
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181 } SDL_MouseMotionEvent;
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182
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183 /**
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184 * \brief Mouse button event structure (event.button.*)
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185 */
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186 typedef struct SDL_MouseButtonEvent
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187 {
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188 Uint32 type; /**< ::SDL_MOUSEBUTTONDOWN or ::SDL_MOUSEBUTTONUP */
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189 Uint32 windowID; /**< The window with mouse focus, if any */
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190 Uint8 button; /**< The mouse button index */
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191 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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192 Uint8 padding1;
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193 Uint8 padding2;
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194 int x; /**< X coordinate, relative to window */
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195 int y; /**< Y coordinate, relative to window */
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196 } SDL_MouseButtonEvent;
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197
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198 /**
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199 * \brief Mouse wheel event structure (event.wheel.*)
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200 */
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201 typedef struct SDL_MouseWheelEvent
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202 {
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203 Uint32 type; /**< ::SDL_MOUSEWHEEL */
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204 Uint32 windowID; /**< The window with mouse focus, if any */
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205 int x; /**< The amount scrolled horizontally */
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206 int y; /**< The amount scrolled vertically */
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207 } SDL_MouseWheelEvent;
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208
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209 /**
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210 * \brief Joystick axis motion event structure (event.jaxis.*)
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211 */
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212 typedef struct SDL_JoyAxisEvent
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213 {
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214 Uint32 type; /**< ::SDL_JOYAXISMOTION */
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215 Uint8 which; /**< The joystick device index */
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216 Uint8 axis; /**< The joystick axis index */
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217 Uint8 padding1;
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218 Uint8 padding2;
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219 int value; /**< The axis value (range: -32768 to 32767) */
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220 } SDL_JoyAxisEvent;
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221
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222 /**
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223 * \brief Joystick trackball motion event structure (event.jball.*)
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224 */
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225 typedef struct SDL_JoyBallEvent
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226 {
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227 Uint32 type; /**< ::SDL_JOYBALLMOTION */
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228 Uint8 which; /**< The joystick device index */
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229 Uint8 ball; /**< The joystick trackball index */
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230 Uint8 padding1;
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231 Uint8 padding2;
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232 int xrel; /**< The relative motion in the X direction */
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233 int yrel; /**< The relative motion in the Y direction */
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234 } SDL_JoyBallEvent;
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235
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236 /**
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237 * \brief Joystick hat position change event structure (event.jhat.*)
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238 */
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239 typedef struct SDL_JoyHatEvent
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240 {
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241 Uint32 type; /**< ::SDL_JOYHATMOTION */
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242 Uint8 which; /**< The joystick device index */
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243 Uint8 hat; /**< The joystick hat index */
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244 Uint8 value; /**< The hat position value.
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245 * \sa ::SDL_HAT_LEFTUP ::SDL_HAT_UP ::SDL_HAT_RIGHTUP
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246 * \sa ::SDL_HAT_LEFT ::SDL_HAT_CENTERED ::SDL_HAT_RIGHT
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247 * \sa ::SDL_HAT_LEFTDOWN ::SDL_HAT_DOWN ::SDL_HAT_RIGHTDOWN
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248 *
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249 * Note that zero means the POV is centered.
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250 */
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251 Uint8 padding1;
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252 } SDL_JoyHatEvent;
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253
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254 /**
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255 * \brief Joystick button event structure (event.jbutton.*)
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256 */
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257 typedef struct SDL_JoyButtonEvent
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258 {
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259 Uint32 type; /**< ::SDL_JOYBUTTONDOWN or ::SDL_JOYBUTTONUP */
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260 Uint8 which; /**< The joystick device index */
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261 Uint8 button; /**< The joystick button index */
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262 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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263 Uint8 padding1;
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264 } SDL_JoyButtonEvent;
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265
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266 /**
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267 * \brief The "quit requested" event
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268 */
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269 typedef struct SDL_QuitEvent
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270 {
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271 Uint32 type; /**< ::SDL_QUIT */
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272 } SDL_QuitEvent;
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273
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274 /**
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275 * \brief A user-defined event type (event.user.*)
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276 */
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277 typedef struct SDL_UserEvent
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278 {
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279 Uint32 type; /**< ::SDL_USEREVENT through ::SDL_NUMEVENTS-1 */
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280 Uint32 windowID; /**< The associated window if any */
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281 int code; /**< User defined event code */
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282 void *data1; /**< User defined data pointer */
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283 void *data2; /**< User defined data pointer */
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284 } SDL_UserEvent;
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285
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286 struct SDL_SysWMmsg;
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287 typedef struct SDL_SysWMmsg SDL_SysWMmsg;
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288
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289 /**
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290 * \brief A video driver dependent system event (event.syswm.*)
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291 *
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292 * \note If you want to use this event, you should include SDL_syswm.h.
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293 */
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294 typedef struct SDL_SysWMEvent
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295 {
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296 Uint32 type; /**< ::SDL_SYSWMEVENT */
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297 SDL_SysWMmsg *msg; /**< driver dependent data, defined in SDL_syswm.h */
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298 } SDL_SysWMEvent;
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299
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300 #ifndef SDL_NO_COMPAT
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301 /**
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302 * \addtogroup Compatibility
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303 */
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304 /*@{*/
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305
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306 /**
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307 * \name Typedefs for backwards compatibility
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308 */
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309 /*@{*/
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310 typedef struct SDL_ActiveEvent
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311 {
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312 Uint32 type;
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313 Uint8 gain;
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314 Uint8 state;
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315 } SDL_ActiveEvent;
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316
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317 typedef struct SDL_ResizeEvent
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318 {
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319 Uint32 type;
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320 int w;
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321 int h;
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322 } SDL_ResizeEvent;
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323 /*@}*/
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324
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325 /*@}*//*Compatibility*/
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326 #endif
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327
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328 /**
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329 * \brief General event structure
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330 */
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331 typedef union SDL_Event
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332 {
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333 Uint32 type; /**< Event type, shared with all events */
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334 SDL_WindowEvent window; /**< Window event data */
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335 SDL_KeyboardEvent key; /**< Keyboard event data */
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336 SDL_TextEditingEvent edit; /**< Text editing event data */
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337 SDL_TextInputEvent text; /**< Text input event data */
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338 SDL_MouseMotionEvent motion; /**< Mouse motion event data */
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339 SDL_MouseButtonEvent button; /**< Mouse button event data */
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340 SDL_MouseWheelEvent wheel; /**< Mouse wheel event data */
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341 SDL_JoyAxisEvent jaxis; /**< Joystick axis event data */
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342 SDL_JoyBallEvent jball; /**< Joystick ball event data */
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343 SDL_JoyHatEvent jhat; /**< Joystick hat event data */
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344 SDL_JoyButtonEvent jbutton; /**< Joystick button event data */
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345 SDL_QuitEvent quit; /**< Quit request event data */
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346 SDL_UserEvent user; /**< Custom event data */
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347 SDL_SysWMEvent syswm; /**< System dependent window event data */
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348
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349 /** Temporarily here for backwards compatibility */
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350 /*@{*/
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351 #ifndef SDL_NO_COMPAT
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352 SDL_ActiveEvent active;
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353 SDL_ResizeEvent resize;
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354 #endif
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355 /*@}*/
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356 } SDL_Event;
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357
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358
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359 /* Function prototypes */
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360
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361 /**
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362 * Pumps the event loop, gathering events from the input devices.
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363 *
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364 * This function updates the event queue and internal input device state.
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365 *
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366 * This should only be run in the thread that sets the video mode.
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367 */
337
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368 extern DECLSPEC void SDLCALL SDL_PumpEvents(void);
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369
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370 /*@{*/
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371 typedef enum
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372 {
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373 SDL_ADDEVENT,
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374 SDL_PEEKEVENT,
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375 SDL_GETEVENT
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376 } SDL_eventaction;
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377
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378 /**
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379 * Checks the event queue for messages and optionally returns them.
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380 *
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381 * If \c action is ::SDL_ADDEVENT, up to \c numevents events will be added to
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382 * the back of the event queue.
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383 *
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384 * If \c action is ::SDL_PEEKEVENT, up to \c numevents events at the front
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385 * of the event queue, matching \c mask, will be returned and will not
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386 * be removed from the queue.
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387 *
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388 * If \c action is ::SDL_GETEVENT, up to \c numevents events at the front
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389 * of the event queue, matching \c mask, will be returned and will be
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390 * removed from the queue.
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391 *
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392 * \return The number of events actually stored, or -1 if there was an error.
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393 *
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394 * This function is thread-safe.
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395 */
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396 extern DECLSPEC int SDLCALL SDL_PeepEvents(SDL_Event * events, int numevents,
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397 SDL_eventaction action,
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398 Uint32 minType, Uint32 maxType);
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399 /*@}*/
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400
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401 /**
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402 * Checks to see if certain event types are in the event queue.
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403 */
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404 extern DECLSPEC SDL_bool SDLCALL SDL_HasEvent(Uint32 type);
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405 extern DECLSPEC SDL_bool SDLCALL SDL_HasEvents(Uint32 minType, Uint32 maxType);
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406
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407 /**
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408 * This function clears events from the event queue
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409 */
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410 extern DECLSPEC void SDLCALL SDL_FlushEvent(Uint32 type);
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411 extern DECLSPEC void SDLCALL SDL_FlushEvents(Uint32 minType, Uint32 maxType);
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412
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413 /**
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414 * \brief Polls for currently pending events.
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415 *
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416 * \return 1 if there are any pending events, or 0 if there are none available.
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417 *
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418 * \param event If not NULL, the next event is removed from the queue and
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419 * stored in that area.
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420 */
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421 extern DECLSPEC int SDLCALL SDL_PollEvent(SDL_Event * event);
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422
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423 /**
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424 * \brief Waits indefinitely for the next available event.
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425 *
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426 * \return 1, or 0 if there was an error while waiting for events.
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427 *
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428 * \param event If not NULL, the next event is removed from the queue and
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429 * stored in that area.
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430 */
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431 extern DECLSPEC int SDLCALL SDL_WaitEvent(SDL_Event * event);
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432
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433 /**
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434 * \brief Waits until the specified timeout (in milliseconds) for the next
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435 * 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_WaitEventTimeout(SDL_Event * event,
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443 int timeout);
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444
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445 /**
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446 * \brief Add an event to the event queue.
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447 *
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448 * \return 1 on success, 0 if the event was filtered, or -1 if the event queue
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449 * was full or there was some other error.
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450 */
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451 extern DECLSPEC int SDLCALL SDL_PushEvent(SDL_Event * event);
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452
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453 typedef int (SDLCALL * SDL_EventFilter) (void *userdata, SDL_Event * event);
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454
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455 /**
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456 * Sets up a filter to process all events before they change internal state and
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457 * are posted to the internal event queue.
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458 *
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459 * The filter is protypted as:
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460 * \code
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461 * int SDL_EventFilter(void *userdata, SDL_Event * event);
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462 * \endcode
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463 *
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464 * If the filter returns 1, then the event will be added to the internal queue.
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465 * If it returns 0, then the event will be dropped from the queue, but the
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466 * internal state will still be updated. This allows selective filtering of
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467 * dynamically arriving events.
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468 *
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469 * \warning Be very careful of what you do in the event filter function, as
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470 * it may run in a different thread!
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471 *
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472 * There is one caveat when dealing with the ::SDL_QUITEVENT event type. The
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473 * event filter is only called when the window manager desires to close the
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474 * application window. If the event filter returns 1, then the window will
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475 * be closed, otherwise the window will remain open if possible.
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476 *
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477 * If the quit event is generated by an interrupt signal, it will bypass the
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478 * internal queue and be delivered to the application at the next event poll.
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479 */
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480 extern DECLSPEC void SDLCALL SDL_SetEventFilter(SDL_EventFilter filter,
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481 void *userdata);
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482
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483 /**
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484 * Return the current event filter - can be used to "chain" filters.
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485 * If there is no event filter set, this function returns SDL_FALSE.
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486 */
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487 extern DECLSPEC SDL_bool SDLCALL SDL_GetEventFilter(SDL_EventFilter * filter,
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488 void **userdata);
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489
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490 /**
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491 * Run the filter function on the current event queue, removing any
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492 * events for which the filter returns 0.
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493 */
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494 extern DECLSPEC void SDLCALL SDL_FilterEvents(SDL_EventFilter filter,
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495 void *userdata);
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496
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497 /*@{*/
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498 #define SDL_QUERY -1
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499 #define SDL_IGNORE 0
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500 #define SDL_DISABLE 0
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501 #define SDL_ENABLE 1
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502
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503 /**
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504 * This function allows you to set the state of processing certain events.
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diff changeset
505 * - If \c state is set to ::SDL_IGNORE, that event will be automatically
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506 * dropped from the event queue and will not event be filtered.
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507 * - If \c state is set to ::SDL_ENABLE, that event will be processed
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508 * normally.
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509 * - If \c state is set to ::SDL_QUERY, SDL_EventState() will return the
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510 * current processing state of the specified event.
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511 */
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512 extern DECLSPEC Uint8 SDLCALL SDL_EventState(Uint32 type, int state);
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513 /*@}*/
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514 #define SDL_GetEventState(type) SDL_EventState(type, SDL_QUERY)
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515
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516 /**
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517 * This function allocates a set of user-defined events, and returns
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518 * the beginning event number for that set of events.
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519 *
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diff changeset
520 * If there aren't enough user-defined events left, this function
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521 * returns (Uint32)-1
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522 */
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523 extern DECLSPEC Uint32 SDLCALL SDL_RegisterEvents(int numevents);
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524
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525 /* Ends C function definitions when using C++ */
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526 #ifdef __cplusplus
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527 /* *INDENT-OFF* */
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528 }
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529 /* *INDENT-ON* */
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530 #endif
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diff changeset
531 #include "close_code.h"
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532
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533 #endif /* _SDL_events_h */
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534
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535 /* vi: set ts=4 sw=4 expandtab: */