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annotate include/SDL_events.h @ 4641:49a97daea6ec

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Added touch event definitions. Heavily modified events/SDL_touch*.
author Jim Grandpre <jim.tla@gmail.com>
date Thu, 27 May 2010 01:21:37 -0400
parents e953700da4ca
children 057e8762d2a1
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 events */
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79 SDL_PROXIMITYIN = 0x500, /**< Proximity In event */
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80 SDL_PROXIMITYOUT, /**< Proximity Out event */
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81
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82 /* Joystick events */
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83 SDL_JOYAXISMOTION = 0x600, /**< Joystick axis motion */
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84 SDL_JOYBALLMOTION, /**< Joystick trackball motion */
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85 SDL_JOYHATMOTION, /**< Joystick hat position change */
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86 SDL_JOYBUTTONDOWN, /**< Joystick button pressed */
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87 SDL_JOYBUTTONUP, /**< Joystick button released */
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88
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89 /*Touch events - is 0x700 the correct place?*/
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90 SDL_FINGERDOWN = 0x700,
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91 SDL_FINGERUP,
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92 SDL_FINGERMOTION,
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93 SDL_TOUCHBUTTONDOWN,
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94 SDL_TOUCHBUTTONUP,
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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
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102 /** Events ::SDL_USEREVENT through ::SDL_LASTEVENT are for your use,
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103 * and should be allocated with SDL_RegisterEvents()
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104 */
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105 SDL_USEREVENT = 0x8000,
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106
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107 /**
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108 * This last event is only for bounding internal arrays
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109 */
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110 SDL_LASTEVENT = 0xFFFF
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111 } SDL_EventType;
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112
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113 /**
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114 * \brief Window state change event data (event.window.*)
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115 */
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116 typedef struct SDL_WindowEvent
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117 {
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118 Uint32 type; /**< ::SDL_WINDOWEVENT */
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119 Uint32 windowID; /**< The associated window */
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120 Uint8 event; /**< ::SDL_WindowEventID */
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121 Uint8 padding1;
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122 Uint8 padding2;
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123 Uint8 padding3;
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124 int data1; /**< event dependent data */
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125 int data2; /**< event dependent data */
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126 } SDL_WindowEvent;
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127
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128 /**
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129 * \brief Keyboard button event structure (event.key.*)
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130 */
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131 typedef struct SDL_KeyboardEvent
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132 {
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133 Uint32 type; /**< ::SDL_KEYDOWN or ::SDL_KEYUP */
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134 Uint32 windowID; /**< The window with keyboard focus, if any */
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135 Uint8 which; /**< The keyboard device index */
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136 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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137 Uint8 padding1;
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138 Uint8 padding2;
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139 SDL_keysym keysym; /**< The key that was pressed or released */
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140 } SDL_KeyboardEvent;
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141
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142 #define SDL_TEXTEDITINGEVENT_TEXT_SIZE (32)
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143 /**
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144 * \brief Keyboard text editing event structure (event.edit.*)
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145 */
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146 typedef struct SDL_TextEditingEvent
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147 {
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148 Uint32 type; /**< ::SDL_TEXTEDITING */
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149 Uint32 windowID; /**< The window with keyboard focus, if any */
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150 Uint8 which; /**< The keyboard device index */
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151 char text[SDL_TEXTEDITINGEVENT_TEXT_SIZE]; /**< The editing text */
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152 int start; /**< The start cursor of selected editing text */
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153 int length; /**< The length of selected editing text */
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154 } SDL_TextEditingEvent;
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155
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156
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157 #define SDL_TEXTINPUTEVENT_TEXT_SIZE (32)
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158 /**
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159 * \brief Keyboard text input event structure (event.text.*)
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160 */
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161 typedef struct SDL_TextInputEvent
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162 {
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163 Uint32 type; /**< ::SDL_TEXTINPUT */
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164 Uint32 windowID; /**< The window with keyboard focus, if any */
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165 Uint8 which; /**< The keyboard device index */
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166 Uint8 padding1;
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167 Uint8 padding2;
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168 Uint8 padding3;
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169 char text[SDL_TEXTINPUTEVENT_TEXT_SIZE]; /**< The input text */
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170 } SDL_TextInputEvent;
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171
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172 /**
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173 * \brief Mouse motion event structure (event.motion.*)
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174 */
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175 typedef struct SDL_MouseMotionEvent
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176 {
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177 Uint32 type; /**< ::SDL_MOUSEMOTION */
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178 Uint32 windowID; /**< The window with mouse focus, if any */
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179 Uint8 which; /**< The mouse device index */
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180 Uint8 state; /**< The current button state */
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181 Uint8 padding1;
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182 Uint8 padding2;
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183 int x; /**< X coordinate, relative to window */
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184 int y; /**< Y coordinate, relative to window */
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185 int z; /**< Z coordinate, for future use */
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186 int pressure; /**< Pressure reported by tablets */
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187 int pressure_max; /**< Maximum value of the pressure reported by the device */
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188 int pressure_min; /**< Minimum value of the pressure reported by the device */
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189 int rotation; /**< For future use */
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190 int tilt_x; /**< For future use */
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191 int tilt_y; /**< For future use */
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192 int cursor; /**< The cursor being used in the event */
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193 int xrel; /**< The relative motion in the X direction */
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194 int yrel; /**< The relative motion in the Y direction */
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195 } SDL_MouseMotionEvent;
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196
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197 /**
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198 * \brief Mouse button event structure (event.button.*)
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199 */
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200 typedef struct SDL_MouseButtonEvent
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201 {
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202 Uint32 type; /**< ::SDL_MOUSEBUTTONDOWN or ::SDL_MOUSEBUTTONUP */
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203 Uint32 windowID; /**< The window with mouse focus, if any */
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204 Uint8 which; /**< The mouse device index */
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205 Uint8 button; /**< The mouse button index */
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206 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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207 Uint8 padding1;
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208 int x; /**< X coordinate, relative to window */
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209 int y; /**< Y coordinate, relative to window */
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210 } SDL_MouseButtonEvent;
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211
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212 /**
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213 * \brief Mouse wheel event structure (event.wheel.*)
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214 */
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215 typedef struct SDL_MouseWheelEvent
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216 {
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217 Uint32 type; /**< ::SDL_MOUSEWHEEL */
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218 Uint32 windowID; /**< The window with mouse focus, if any */
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219 Uint8 which; /**< The mouse device index */
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220 Uint8 padding1;
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221 Uint8 padding2;
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222 Uint8 padding3;
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223 int x; /**< The amount scrolled horizontally */
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224 int y; /**< The amount scrolled vertically */
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225 } SDL_MouseWheelEvent;
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226
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227 /**
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228 * \brief Tablet pen proximity event
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229 */
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230 typedef struct SDL_ProximityEvent
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231 {
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232 Uint32 type; /**< ::SDL_PROXIMITYIN or ::SDL_PROXIMITYOUT */
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233 Uint32 windowID; /**< The associated window */
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234 Uint8 which;
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235 Uint8 padding1;
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236 Uint8 padding2;
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237 Uint8 padding3;
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238 int cursor;
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239 int x;
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240 int y;
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241 } SDL_ProximityEvent;
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242
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243 /**
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244 * \brief Joystick axis motion event structure (event.jaxis.*)
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245 */
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246 typedef struct SDL_JoyAxisEvent
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247 {
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248 Uint32 type; /**< ::SDL_JOYAXISMOTION */
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249 Uint8 which; /**< The joystick device index */
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250 Uint8 axis; /**< The joystick axis index */
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251 Uint8 padding1;
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252 Uint8 padding2;
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253 int value; /**< The axis value (range: -32768 to 32767) */
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254 } SDL_JoyAxisEvent;
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255
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256 /**
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257 * \brief Joystick trackball motion event structure (event.jball.*)
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258 */
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259 typedef struct SDL_JoyBallEvent
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260 {
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261 Uint32 type; /**< ::SDL_JOYBALLMOTION */
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262 Uint8 which; /**< The joystick device index */
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263 Uint8 ball; /**< The joystick trackball index */
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264 Uint8 padding1;
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265 Uint8 padding2;
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266 int xrel; /**< The relative motion in the X direction */
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267 int yrel; /**< The relative motion in the Y direction */
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268 } SDL_JoyBallEvent;
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269
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270 /**
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271 * \brief Joystick hat position change event structure (event.jhat.*)
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272 */
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273 typedef struct SDL_JoyHatEvent
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274 {
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275 Uint32 type; /**< ::SDL_JOYHATMOTION */
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276 Uint8 which; /**< The joystick device index */
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277 Uint8 hat; /**< The joystick hat index */
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278 Uint8 value; /**< The hat position value.
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279 * \sa ::SDL_HAT_LEFTUP ::SDL_HAT_UP ::SDL_HAT_RIGHTUP
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280 * \sa ::SDL_HAT_LEFT ::SDL_HAT_CENTERED ::SDL_HAT_RIGHT
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281 * \sa ::SDL_HAT_LEFTDOWN ::SDL_HAT_DOWN ::SDL_HAT_RIGHTDOWN
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282 *
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283 * Note that zero means the POV is centered.
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284 */
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285 Uint8 padding1;
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286 } SDL_JoyHatEvent;
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287
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288 /**
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289 * \brief Joystick button event structure (event.jbutton.*)
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290 */
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291 typedef struct SDL_JoyButtonEvent
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292 {
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293 Uint32 type; /**< ::SDL_JOYBUTTONDOWN or ::SDL_JOYBUTTONUP */
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294 Uint8 which; /**< The joystick device index */
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295 Uint8 button; /**< The joystick button index */
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296 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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297 Uint8 padding1;
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298 } SDL_JoyButtonEvent;
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299
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300
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301 /**
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302 * \brief Touch finger motion/finger event structure (event.tmotion.*)
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303 */
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304 typedef struct SDL_TouchFingerEvent
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305 {
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306 Uint32 type; /**< ::SDL_FINGERMOTION OR
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307 SDL_FINGERDOWN OR SDL_FINGERUP*/
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308 Uint32 windowID; /**< The window with mouse focus, if any */
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309 Uint8 touchId; /**< The touch device id */
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310 Uint8 state; /**< The current button state */
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311 Uint8 fingerId;
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312 Uint8 padding1;
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313 } SDL_TouchFingerEvent;
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314
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315
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316 /**
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317 * \brief Touch finger motion/finger event structure (event.tmotion.*)
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318 */
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319 typedef struct SDL_TouchButtonEvent
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320 {
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321 Uint32 type; /**< ::SDL_TOUCHBUTTONUP OR SDL_TOUCHBUTTONDOWN */
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322 Uint32 windowID; /**< The window with mouse focus, if any */
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323 Uint8 touchId; /**< The touch device index */
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324 Uint8 state; /**< The current button state */
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325 Uint8 button; /**< The button changing state */
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326 Uint8 padding1;
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327
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328 } SDL_TouchButtonEvent;
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329
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330
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331 /**
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332 * \brief The "quit requested" event
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333 */
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334 typedef struct SDL_QuitEvent
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335 {
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336 Uint32 type; /**< ::SDL_QUIT */
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337 } SDL_QuitEvent;
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338
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339 /**
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340 * \brief A user-defined event type (event.user.*)
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341 */
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342 typedef struct SDL_UserEvent
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343 {
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344 Uint32 type; /**< ::SDL_USEREVENT through ::SDL_NUMEVENTS-1 */
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345 Uint32 windowID; /**< The associated window if any */
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346 int code; /**< User defined event code */
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347 void *data1; /**< User defined data pointer */
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348 void *data2; /**< User defined data pointer */
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349 } SDL_UserEvent;
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350
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351 struct SDL_SysWMmsg;
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352 typedef struct SDL_SysWMmsg SDL_SysWMmsg;
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353
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354 /**
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355 * \brief A video driver dependent system event (event.syswm.*)
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356 *
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357 * \note If you want to use this event, you should include SDL_syswm.h.
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358 */
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359 typedef struct SDL_SysWMEvent
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360 {
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361 Uint32 type; /**< ::SDL_SYSWMEVENT */
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362 SDL_SysWMmsg *msg; /**< driver dependent data, defined in SDL_syswm.h */
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363 } SDL_SysWMEvent;
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364
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365 #ifndef SDL_NO_COMPAT
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366 /**
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367 * \addtogroup Compatibility
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368 */
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369 /*@{*/
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370
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371 /**
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372 * \name Typedefs for backwards compatibility
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373 */
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374 /*@{*/
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375 typedef struct SDL_ActiveEvent
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376 {
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377 Uint32 type;
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378 Uint8 gain;
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379 Uint8 state;
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380 } SDL_ActiveEvent;
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381
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382 typedef struct SDL_ResizeEvent
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383 {
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384 Uint32 type;
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385 int w;
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386 int h;
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387 } SDL_ResizeEvent;
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388 /*@}*/
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389
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390 /*@}*//*Compatibility*/
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391 #endif
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392
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393 /**
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394 * \brief General event structure
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395 */
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396 typedef union SDL_Event
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397 {
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398 Uint32 type; /**< Event type, shared with all events */
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399 SDL_WindowEvent window; /**< Window event data */
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400 SDL_KeyboardEvent key; /**< Keyboard event data */
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401 SDL_TextEditingEvent edit; /**< Text editing event data */
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402 SDL_TextInputEvent text; /**< Text input event data */
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403 SDL_MouseMotionEvent motion; /**< Mouse motion event data */
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404 SDL_MouseButtonEvent button; /**< Mouse button event data */
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405 SDL_MouseWheelEvent wheel; /**< Mouse wheel event data */
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406 SDL_JoyAxisEvent jaxis; /**< Joystick axis event data */
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407 SDL_JoyBallEvent jball; /**< Joystick ball event data */
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408 SDL_JoyHatEvent jhat; /**< Joystick hat event data */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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409 SDL_JoyButtonEvent jbutton; /**< Joystick button event data */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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410 SDL_QuitEvent quit; /**< Quit request event data */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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411 SDL_UserEvent user; /**< Custom event data */
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diff changeset
412 SDL_SysWMEvent syswm; /**< System dependent window event data */
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44e49d3fa6cf Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents: 2300
diff changeset
413 SDL_ProximityEvent proximity; /**< Proximity In or Out event */
4641
49a97daea6ec Added touch event definitions. Heavily modified events/SDL_touch*.
Jim Grandpre <jim.tla@gmail.com>
parents: 4435
diff changeset
414 SDL_TouchFingerEvent tfinger; /**< Touch finger event data */
49a97daea6ec Added touch event definitions. Heavily modified events/SDL_touch*.
Jim Grandpre <jim.tla@gmail.com>
parents: 4435
diff changeset
415 SDL_TouchButtonEvent tbutton; /**< Touch button event data */
1895
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diff changeset
416
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417 /** Temporarily here for backwards compatibility */
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418 /*@{*/
3167
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419 #ifndef SDL_NO_COMPAT
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420 SDL_ActiveEvent active;
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421 SDL_ResizeEvent resize;
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422 #endif
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423 /*@}*/
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424 } SDL_Event;
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425
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426
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parents:
diff changeset
427 /* Function prototypes */
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428
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429 /**
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430 * Pumps the event loop, gathering events from the input devices.
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431 *
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432 * This function updates the event queue and internal input device state.
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433 *
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434 * This should only be run in the thread that sets the video mode.
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435 */
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
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436 extern DECLSPEC void SDLCALL SDL_PumpEvents(void);
0
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437
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438 /*@{*/
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439 typedef enum
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440 {
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441 SDL_ADDEVENT,
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442 SDL_PEEKEVENT,
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443 SDL_GETEVENT
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444 } SDL_eventaction;
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445
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446 /**
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447 * Checks the event queue for messages and optionally returns them.
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448 *
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449 * If \c action is ::SDL_ADDEVENT, up to \c numevents events will be added to
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450 * the back of the event queue.
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451 *
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452 * If \c action is ::SDL_PEEKEVENT, up to \c numevents events at the front
d3baf5ac4e37 Partial fix for bug #859
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453 * of the event queue, matching \c mask, will be returned and will not
d3baf5ac4e37 Partial fix for bug #859
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diff changeset
454 * be removed from the queue.
d3baf5ac4e37 Partial fix for bug #859
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455 *
d3baf5ac4e37 Partial fix for bug #859
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456 * If \c action is ::SDL_GETEVENT, up to \c numevents events at the front
d3baf5ac4e37 Partial fix for bug #859
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457 * of the event queue, matching \c mask, will be returned and will be
d3baf5ac4e37 Partial fix for bug #859
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diff changeset
458 * removed from the queue.
d3baf5ac4e37 Partial fix for bug #859
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459 *
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Sam Lantinga <slouken@libsdl.org>
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460 * \return The number of events actually stored, or -1 if there was an error.
d3baf5ac4e37 Partial fix for bug #859
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461 *
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462 * This function is thread-safe.
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Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
463 */
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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464 extern DECLSPEC int SDLCALL SDL_PeepEvents(SDL_Event * events, int numevents,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
465 SDL_eventaction action,
4429
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diff changeset
466 Uint32 minType, Uint32 maxType);
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467 /*@}*/
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
468
3407
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diff changeset
469 /**
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470 * Checks to see if certain event types are in the event queue.
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
471 */
4429
faa9fc8e7f67 General improvements for user custom event registration
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diff changeset
472 extern DECLSPEC SDL_bool SDLCALL SDL_HasEvent(Uint32 type);
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
473 extern DECLSPEC SDL_bool SDLCALL SDL_HasEvents(Uint32 minType, Uint32 maxType);
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
474
faa9fc8e7f67 General improvements for user custom event registration
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parents: 3697
diff changeset
475 /**
faa9fc8e7f67 General improvements for user custom event registration
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diff changeset
476 * This function clears events from the event queue
faa9fc8e7f67 General improvements for user custom event registration
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diff changeset
477 */
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diff changeset
478 extern DECLSPEC void SDLCALL SDL_FlushEvent(Uint32 type);
faa9fc8e7f67 General improvements for user custom event registration
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diff changeset
479 extern DECLSPEC void SDLCALL SDL_FlushEvents(Uint32 minType, Uint32 maxType);
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diff changeset
480
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diff changeset
481 /**
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diff changeset
482 * \brief Polls for currently pending events.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
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diff changeset
483 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
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diff changeset
484 * \return 1 if there are any pending events, or 0 if there are none available.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
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485 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
486 * \param event If not NULL, the next event is removed from the queue and
d3baf5ac4e37 Partial fix for bug #859
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parents: 3280
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487 * stored in that area.
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parents:
diff changeset
488 */
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diff changeset
489 extern DECLSPEC int SDLCALL SDL_PollEvent(SDL_Event * event);
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parents:
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490
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parents: 3280
diff changeset
491 /**
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parents: 3280
diff changeset
492 * \brief Waits indefinitely for the next available event.
d3baf5ac4e37 Partial fix for bug #859
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diff changeset
493 *
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
494 * \return 1, or 0 if there was an error while waiting for events.
d3baf5ac4e37 Partial fix for bug #859
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diff changeset
495 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
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496 * \param event If not NULL, the next event is removed from the queue and
d3baf5ac4e37 Partial fix for bug #859
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diff changeset
497 * stored in that area.
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diff changeset
498 */
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
499 extern DECLSPEC int SDLCALL SDL_WaitEvent(SDL_Event * event);
0
74212992fb08 Initial revision
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parents:
diff changeset
500
3407
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diff changeset
501 /**
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Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
502 * \brief Waits until the specified timeout (in milliseconds) for the next
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Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
503 * available event.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
504 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
505 * \return 1, or 0 if there was an error while waiting for events.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
506 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
507 * \param event If not NULL, the next event is removed from the queue and
d3baf5ac4e37 Partial fix for bug #859
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parents: 3280
diff changeset
508 * stored in that area.
3072
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
509 */
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
510 extern DECLSPEC int SDLCALL SDL_WaitEventTimeout(SDL_Event * event,
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
511 int timeout);
9da8f57ab92c Fixed bug #684
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
512
3407
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parents: 3280
diff changeset
513 /**
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Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
514 * \brief Add an event to the event queue.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
515 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
516 * \return 1 on success, 0 if the event was filtered, or -1 if the event queue
d3baf5ac4e37 Partial fix for bug #859
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parents: 3280
diff changeset
517 * was full or there was some other error.
0
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parents:
diff changeset
518 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
519 extern DECLSPEC int SDLCALL SDL_PushEvent(SDL_Event * event);
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parents:
diff changeset
520
3407
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diff changeset
521 typedef int (SDLCALL * SDL_EventFilter) (void *userdata, SDL_Event * event);
0
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parents:
diff changeset
522
3407
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parents: 3280
diff changeset
523 /**
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
524 * Sets up a filter to process all events before they change internal state and
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
525 * are posted to the internal event queue.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
526 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
527 * The filter is protypted as:
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
528 * \code
d3baf5ac4e37 Partial fix for bug #859
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parents: 3280
diff changeset
529 * int SDL_EventFilter(void *userdata, SDL_Event * event);
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
530 * \endcode
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
531 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
532 * If the filter returns 1, then the event will be added to the internal queue.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
533 * If it returns 0, then the event will be dropped from the queue, but the
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
534 * internal state will still be updated. This allows selective filtering of
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
535 * dynamically arriving events.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
536 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
537 * \warning Be very careful of what you do in the event filter function, as
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
538 * it may run in a different thread!
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
539 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
540 * There is one caveat when dealing with the ::SDL_QUITEVENT event type. The
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
541 * event filter is only called when the window manager desires to close the
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
542 * application window. If the event filter returns 1, then the window will
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
543 * be closed, otherwise the window will remain open if possible.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
544 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
545 * If the quit event is generated by an interrupt signal, it will bypass the
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
546 * internal queue and be delivered to the application at the next event poll.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
547 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
548 extern DECLSPEC void SDLCALL SDL_SetEventFilter(SDL_EventFilter filter,
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549 void *userdata);
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550
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551 /**
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552 * Return the current event filter - can be used to "chain" filters.
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553 * If there is no event filter set, this function returns SDL_FALSE.
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554 */
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555 extern DECLSPEC SDL_bool SDLCALL SDL_GetEventFilter(SDL_EventFilter * filter,
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556 void **userdata);
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557
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558 /**
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559 * Run the filter function on the current event queue, removing any
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560 * events for which the filter returns 0.
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561 */
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562 extern DECLSPEC void SDLCALL SDL_FilterEvents(SDL_EventFilter filter,
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563 void *userdata);
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564
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565 /*@{*/
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566 #define SDL_QUERY -1
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567 #define SDL_IGNORE 0
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568 #define SDL_DISABLE 0
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569 #define SDL_ENABLE 1
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570
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571 /**
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572 * This function allows you to set the state of processing certain events.
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573 * - If \c state is set to ::SDL_IGNORE, that event will be automatically
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574 * dropped from the event queue and will not event be filtered.
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575 * - If \c state is set to ::SDL_ENABLE, that event will be processed
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576 * normally.
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577 * - If \c state is set to ::SDL_QUERY, SDL_EventState() will return the
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578 * current processing state of the specified event.
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579 */
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580 extern DECLSPEC Uint8 SDLCALL SDL_EventState(Uint32 type, int state);
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581 /*@}*/
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582 #define SDL_GetEventState(type) SDL_EventState(type, SDL_QUERY)
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583
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584 /**
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585 * This function allocates a set of user-defined events, and returns
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586 * the beginning event number for that set of events.
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587 *
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588 * If there aren't enough user-defined events left, this function
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589 * returns (Uint32)-1
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590 */
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591 extern DECLSPEC Uint32 SDLCALL SDL_RegisterEvents(int numevents);
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592
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593 /* Ends C function definitions when using C++ */
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594 #ifdef __cplusplus
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595 /* *INDENT-OFF* */
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596 }
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597 /* *INDENT-ON* */
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598 #endif
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599 #include "close_code.h"
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600
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601 #endif /* _SDL_events_h */
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602
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603 /* vi: set ts=4 sw=4 expandtab: */