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annotate include/SDL_events.h @ 4658:454385d76845

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Moved $1 Gestures into the SDL Library
author Jim Grandpre <jim.tla@gmail.com>
date Fri, 09 Jul 2010 00:50:40 -0700
parents eed063a0bf5b
children 063b9455bd1a
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*/
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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 /*Gesture events*/
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97 SDL_DOLLARGESTURE = 0x800,
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98 SDL_MULTIGESTURE,
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99
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100 /* Obsolete events */
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101 SDL_EVENT_COMPAT1 = 0x7000, /**< SDL 1.2 events for compatibility */
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102 SDL_EVENT_COMPAT2,
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103 SDL_EVENT_COMPAT3,
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104
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105
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106 /** Events ::SDL_USEREVENT through ::SDL_LASTEVENT are for your use,
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107 * and should be allocated with SDL_RegisterEvents()
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108 */
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109 SDL_USEREVENT = 0x8000,
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110
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111 /**
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112 * This last event is only for bounding internal arrays
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113 */
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114 SDL_LASTEVENT = 0xFFFF
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115 } SDL_EventType;
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116
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117 /**
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118 * \brief Window state change event data (event.window.*)
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119 */
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120 typedef struct SDL_WindowEvent
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121 {
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122 Uint32 type; /**< ::SDL_WINDOWEVENT */
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123 Uint32 windowID; /**< The associated window */
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124 Uint8 event; /**< ::SDL_WindowEventID */
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125 Uint8 padding1;
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126 Uint8 padding2;
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127 Uint8 padding3;
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128 int data1; /**< event dependent data */
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129 int data2; /**< event dependent data */
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130 } SDL_WindowEvent;
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131
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132 /**
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133 * \brief Keyboard button event structure (event.key.*)
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134 */
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135 typedef struct SDL_KeyboardEvent
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136 {
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137 Uint32 type; /**< ::SDL_KEYDOWN or ::SDL_KEYUP */
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138 Uint32 windowID; /**< The window with keyboard focus, if any */
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139 Uint8 which; /**< The keyboard device index */
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140 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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141 Uint8 padding1;
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142 Uint8 padding2;
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143 SDL_keysym keysym; /**< The key that was pressed or released */
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144 } SDL_KeyboardEvent;
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145
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146 #define SDL_TEXTEDITINGEVENT_TEXT_SIZE (32)
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147 /**
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148 * \brief Keyboard text editing event structure (event.edit.*)
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149 */
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150 typedef struct SDL_TextEditingEvent
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151 {
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152 Uint32 type; /**< ::SDL_TEXTEDITING */
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153 Uint32 windowID; /**< The window with keyboard focus, if any */
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154 Uint8 which; /**< The keyboard device index */
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155 char text[SDL_TEXTEDITINGEVENT_TEXT_SIZE]; /**< The editing text */
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156 int start; /**< The start cursor of selected editing text */
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157 int length; /**< The length of selected editing text */
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158 } SDL_TextEditingEvent;
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159
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160
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161 #define SDL_TEXTINPUTEVENT_TEXT_SIZE (32)
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162 /**
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163 * \brief Keyboard text input event structure (event.text.*)
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164 */
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165 typedef struct SDL_TextInputEvent
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166 {
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167 Uint32 type; /**< ::SDL_TEXTINPUT */
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168 Uint32 windowID; /**< The window with keyboard focus, if any */
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169 Uint8 which; /**< The keyboard device index */
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170 Uint8 padding1;
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171 Uint8 padding2;
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172 Uint8 padding3;
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173 char text[SDL_TEXTINPUTEVENT_TEXT_SIZE]; /**< The input text */
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174 } SDL_TextInputEvent;
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175
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176 /**
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177 * \brief Mouse motion event structure (event.motion.*)
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178 */
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179 typedef struct SDL_MouseMotionEvent
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180 {
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181 Uint32 type; /**< ::SDL_MOUSEMOTION */
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182 Uint32 windowID; /**< The window with mouse focus, if any */
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183 Uint8 which; /**< The mouse device index */
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184 Uint8 state; /**< The current button state */
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185 Uint8 padding1;
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186 Uint8 padding2;
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187 int x; /**< X coordinate, relative to window */
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188 int y; /**< Y coordinate, relative to window */
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189 int z; /**< Z coordinate, for future use */
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190 int pressure; /**< Pressure reported by tablets */
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191 int pressure_max; /**< Maximum value of the pressure reported by the device */
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192 int pressure_min; /**< Minimum value of the pressure reported by the device */
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193 int rotation; /**< For future use */
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194 int tilt_x; /**< For future use */
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195 int tilt_y; /**< For future use */
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196 int cursor; /**< The cursor being used in the event */
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197 int xrel; /**< The relative motion in the X direction */
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198 int yrel; /**< The relative motion in the Y direction */
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199 } SDL_MouseMotionEvent;
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200
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201 /**
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202 * \brief Mouse button event structure (event.button.*)
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203 */
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204 typedef struct SDL_MouseButtonEvent
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205 {
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206 Uint32 type; /**< ::SDL_MOUSEBUTTONDOWN or ::SDL_MOUSEBUTTONUP */
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207 Uint32 windowID; /**< The window with mouse focus, if any */
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208 Uint8 which; /**< The mouse device index */
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209 Uint8 button; /**< The mouse button index */
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210 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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211 Uint8 padding1;
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212 int x; /**< X coordinate, relative to window */
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213 int y; /**< Y coordinate, relative to window */
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214 } SDL_MouseButtonEvent;
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215
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216 /**
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217 * \brief Mouse wheel event structure (event.wheel.*)
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218 */
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219 typedef struct SDL_MouseWheelEvent
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220 {
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221 Uint32 type; /**< ::SDL_MOUSEWHEEL */
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222 Uint32 windowID; /**< The window with mouse focus, if any */
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223 Uint8 which; /**< The mouse device index */
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224 Uint8 padding1;
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225 Uint8 padding2;
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226 Uint8 padding3;
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227 int x; /**< The amount scrolled horizontally */
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228 int y; /**< The amount scrolled vertically */
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229 } SDL_MouseWheelEvent;
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230
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231 /**
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232 * \brief Tablet pen proximity event
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233 */
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234 typedef struct SDL_ProximityEvent
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235 {
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236 Uint32 type; /**< ::SDL_PROXIMITYIN or ::SDL_PROXIMITYOUT */
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237 Uint32 windowID; /**< The associated window */
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238 Uint8 which;
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239 Uint8 padding1;
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240 Uint8 padding2;
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241 Uint8 padding3;
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242 int cursor;
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243 int x;
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244 int y;
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245 } SDL_ProximityEvent;
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246
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247 /**
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248 * \brief Joystick axis motion event structure (event.jaxis.*)
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249 */
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250 typedef struct SDL_JoyAxisEvent
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251 {
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252 Uint32 type; /**< ::SDL_JOYAXISMOTION */
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253 Uint8 which; /**< The joystick device index */
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254 Uint8 axis; /**< The joystick axis index */
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255 Uint8 padding1;
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256 Uint8 padding2;
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257 int value; /**< The axis value (range: -32768 to 32767) */
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258 } SDL_JoyAxisEvent;
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259
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260 /**
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261 * \brief Joystick trackball motion event structure (event.jball.*)
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262 */
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263 typedef struct SDL_JoyBallEvent
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264 {
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265 Uint32 type; /**< ::SDL_JOYBALLMOTION */
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266 Uint8 which; /**< The joystick device index */
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267 Uint8 ball; /**< The joystick trackball index */
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268 Uint8 padding1;
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269 Uint8 padding2;
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270 int xrel; /**< The relative motion in the X direction */
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271 int yrel; /**< The relative motion in the Y direction */
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272 } SDL_JoyBallEvent;
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273
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274 /**
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275 * \brief Joystick hat position change event structure (event.jhat.*)
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276 */
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277 typedef struct SDL_JoyHatEvent
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278 {
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279 Uint32 type; /**< ::SDL_JOYHATMOTION */
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280 Uint8 which; /**< The joystick device index */
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281 Uint8 hat; /**< The joystick hat index */
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282 Uint8 value; /**< The hat position value.
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283 * \sa ::SDL_HAT_LEFTUP ::SDL_HAT_UP ::SDL_HAT_RIGHTUP
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284 * \sa ::SDL_HAT_LEFT ::SDL_HAT_CENTERED ::SDL_HAT_RIGHT
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285 * \sa ::SDL_HAT_LEFTDOWN ::SDL_HAT_DOWN ::SDL_HAT_RIGHTDOWN
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286 *
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287 * Note that zero means the POV is centered.
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288 */
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289 Uint8 padding1;
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290 } SDL_JoyHatEvent;
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291
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292 /**
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293 * \brief Joystick button event structure (event.jbutton.*)
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294 */
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295 typedef struct SDL_JoyButtonEvent
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296 {
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297 Uint32 type; /**< ::SDL_JOYBUTTONDOWN or ::SDL_JOYBUTTONUP */
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298 Uint8 which; /**< The joystick device index */
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299 Uint8 button; /**< The joystick button index */
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300 Uint8 state; /**< ::SDL_PRESSED or ::SDL_RELEASED */
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301 Uint8 padding1;
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302 } SDL_JoyButtonEvent;
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303
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304
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305 /**
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306 * \brief Touch finger motion/finger event structure (event.tmotion.*)
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307 */
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308 typedef struct SDL_TouchFingerEvent
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309 {
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310 Uint32 type; /**< ::SDL_FINGERMOTION OR
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311 SDL_FINGERDOWN OR SDL_FINGERUP*/
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312 Uint32 windowID; /**< The window with mouse focus, if any */
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313 Uint8 touchId; /**< The touch device id */
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314 Uint8 state; /**< The current button state */
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315 Uint8 fingerId;
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316 Uint8 padding1;
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317 int x;
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318 int y;
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319 int pressure;
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320 } SDL_TouchFingerEvent;
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321
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322
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323 /**
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324 * \brief Touch finger motion/finger event structure (event.tmotion.*)
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325 */
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326 typedef struct SDL_TouchButtonEvent
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327 {
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328 Uint32 type; /**< ::SDL_TOUCHBUTTONUP OR SDL_TOUCHBUTTONDOWN */
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329 Uint32 windowID; /**< The window with mouse focus, if any */
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330 Uint8 touchId; /**< The touch device index */
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331 Uint8 state; /**< The current button state */
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332 Uint8 button; /**< The button changing state */
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333 Uint8 padding1;
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334
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335 } SDL_TouchButtonEvent;
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336
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337
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338
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339 /**
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340 * \brief Multiple Finger Gesture Event
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341 */
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342 typedef struct SDL_MultiGestureEvent
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343 {
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344 Uint32 type; /**< ::SDL_MULTIGESTURE */
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345 Uint32 windowID; /**< The window with mouse focus, if any */
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346 Uint8 touchId; /**< The touch device index */
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347 Uint8 padding1;
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348 Uint8 padding2;
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349 Uint8 padding3;
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350 float dTheta;
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351 float dDist;
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352 float x; //currently 0...1. Change to screen coords?
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353 float y;
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354
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355 } SDL_MultiGestureEvent;
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356
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357 typedef struct SDL_DollarGestureEvent
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358 {
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359 Uint32 type; /**< ::SDL_DOLLARGESTURE */
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360 Uint32 windowID; /**< The window with mouse focus, if any */
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361 Uint8 touchId; /**< The touch device index */
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362 Uint8 gestureId;
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363 Uint8 padding2;
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364 Uint8 padding3;
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365 float error;
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366 /*
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367 //TODO: Enable to give location?
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368 float x; //currently 0...1. Change to screen coords?
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369 float y;
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370 */
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371 } SDL_DollarGestureEvent;
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372
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373
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374
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375
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376 /**
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377 * \brief The "quit requested" event
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378 */
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379 typedef struct SDL_QuitEvent
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380 {
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381 Uint32 type; /**< ::SDL_QUIT */
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382 } SDL_QuitEvent;
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383
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384 /**
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385 * \brief A user-defined event type (event.user.*)
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386 */
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387 typedef struct SDL_UserEvent
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388 {
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389 Uint32 type; /**< ::SDL_USEREVENT through ::SDL_NUMEVENTS-1 */
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390 Uint32 windowID; /**< The associated window if any */
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391 int code; /**< User defined event code */
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392 void *data1; /**< User defined data pointer */
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393 void *data2; /**< User defined data pointer */
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394 } SDL_UserEvent;
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395
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396 struct SDL_SysWMmsg;
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397 typedef struct SDL_SysWMmsg SDL_SysWMmsg;
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398
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399 /**
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400 * \brief A video driver dependent system event (event.syswm.*)
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401 *
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402 * \note If you want to use this event, you should include SDL_syswm.h.
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403 */
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404 typedef struct SDL_SysWMEvent
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405 {
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406 Uint32 type; /**< ::SDL_SYSWMEVENT */
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407 SDL_SysWMmsg *msg; /**< driver dependent data, defined in SDL_syswm.h */
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408 } SDL_SysWMEvent;
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409
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410 #ifndef SDL_NO_COMPAT
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411 /**
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412 * \addtogroup Compatibility
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413 */
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diff changeset
414 /*@{*/
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415
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diff changeset
416 /**
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diff changeset
417 * \name Typedefs for backwards compatibility
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diff changeset
418 */
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419 /*@{*/
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420 typedef struct SDL_ActiveEvent
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421 {
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422 Uint32 type;
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Bob Pendleton <bob@pendleton.com>
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diff changeset
423 Uint8 gain;
0c85abc61e47 Added a #ifndef SDL_NO_COMPAT around SDL_ActiveEvent and SDL_ResizeEvent so that code
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424 Uint8 state;
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425 } SDL_ActiveEvent;
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diff changeset
426
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diff changeset
427 typedef struct SDL_ResizeEvent
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428 {
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429 Uint32 type;
3167
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diff changeset
430 int w;
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diff changeset
431 int h;
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432 } SDL_ResizeEvent;
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433 /*@}*/
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434
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435 /*@}*//*Compatibility*/
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diff changeset
436 #endif
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diff changeset
437
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438 /**
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439 * \brief General event structure
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440 */
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441 typedef union SDL_Event
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442 {
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443 Uint32 type; /**< Event type, shared with all events */
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444 SDL_WindowEvent window; /**< Window event data */
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445 SDL_KeyboardEvent key; /**< Keyboard event data */
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00cace2d9080 Merged a cleaned up version of Jiang's code changes from Google Summer of Code 2009
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diff changeset
446 SDL_TextEditingEvent edit; /**< Text editing event data */
2300
c97ad1abe05b Minimal implementation of textinput events for x11. It only works for latin-1.
Bob Pendleton <bob@pendleton.com>
parents: 2152
diff changeset
447 SDL_TextInputEvent text; /**< Text input event data */
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448 SDL_MouseMotionEvent motion; /**< Mouse motion event data */
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449 SDL_MouseButtonEvent button; /**< Mouse button event data */
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450 SDL_MouseWheelEvent wheel; /**< Mouse wheel event data */
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451 SDL_JoyAxisEvent jaxis; /**< Joystick axis event data */
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452 SDL_JoyBallEvent jball; /**< Joystick ball event data */
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453 SDL_JoyHatEvent jhat; /**< Joystick hat event data */
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454 SDL_JoyButtonEvent jbutton; /**< Joystick button event data */
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455 SDL_QuitEvent quit; /**< Quit request event data */
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456 SDL_UserEvent user; /**< Custom event data */
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457 SDL_SysWMEvent syswm; /**< System dependent window event data */
2710
44e49d3fa6cf Final merge of Google Summer of Code 2008 work...
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parents: 2300
diff changeset
458 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>
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diff changeset
459 SDL_TouchFingerEvent tfinger; /**< Touch finger event data */
49a97daea6ec Added touch event definitions. Heavily modified events/SDL_touch*.
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parents: 4435
diff changeset
460 SDL_TouchButtonEvent tbutton; /**< Touch button event data */
4657
eed063a0bf5b Moved Multi finger gesture recognition into the library.
Jim Grandpre <jim.tla@gmail.com>
parents: 4644
diff changeset
461 SDL_MultiGestureEvent mgesture; /**< Multi Finger Gesture data*/
4658
454385d76845 Moved $1 Gestures into the SDL Library
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parents: 4657
diff changeset
462 SDL_DollarGestureEvent dgesture; /**< Multi Finger Gesture data*/
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diff changeset
463
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464 /** Temporarily here for backwards compatibility */
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465 /*@{*/
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diff changeset
466 #ifndef SDL_NO_COMPAT
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467 SDL_ActiveEvent active;
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468 SDL_ResizeEvent resize;
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diff changeset
469 #endif
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diff changeset
470 /*@}*/
0
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471 } SDL_Event;
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472
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diff changeset
473
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diff changeset
474 /* Function prototypes */
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475
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476 /**
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diff changeset
477 * Pumps the event loop, gathering events from the input devices.
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478 *
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diff changeset
479 * This function updates the event queue and internal input device state.
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480 *
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diff changeset
481 * This should only be run in the thread that sets the video mode.
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482 */
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
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diff changeset
483 extern DECLSPEC void SDLCALL SDL_PumpEvents(void);
0
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diff changeset
484
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diff changeset
485 /*@{*/
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diff changeset
486 typedef enum
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diff changeset
487 {
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488 SDL_ADDEVENT,
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diff changeset
489 SDL_PEEKEVENT,
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490 SDL_GETEVENT
0
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diff changeset
491 } SDL_eventaction;
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diff changeset
492
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diff changeset
493 /**
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494 * Checks the event queue for messages and optionally returns them.
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495 *
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496 * If \c action is ::SDL_ADDEVENT, up to \c numevents events will be added to
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497 * the back of the event queue.
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498 *
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diff changeset
499 * If \c action is ::SDL_PEEKEVENT, up to \c numevents events at the front
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diff changeset
500 * of the event queue, matching \c mask, will be returned and will not
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501 * be removed from the queue.
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502 *
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parents: 3280
diff changeset
503 * If \c action is ::SDL_GETEVENT, up to \c numevents events at the front
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
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diff changeset
504 * of the event queue, matching \c mask, will be returned and will be
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diff changeset
505 * removed from the queue.
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
506 *
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
507 * \return The number of events actually stored, or -1 if there was an error.
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508 *
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diff changeset
509 * This function is thread-safe.
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diff changeset
510 */
1895
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diff changeset
511 extern DECLSPEC int SDLCALL SDL_PeepEvents(SDL_Event * events, int numevents,
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diff changeset
512 SDL_eventaction action,
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diff changeset
513 Uint32 minType, Uint32 maxType);
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diff changeset
514 /*@}*/
1895
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diff changeset
515
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diff changeset
516 /**
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diff changeset
517 * 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
518 */
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diff changeset
519 extern DECLSPEC SDL_bool SDLCALL SDL_HasEvent(Uint32 type);
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diff changeset
520 extern DECLSPEC SDL_bool SDLCALL SDL_HasEvents(Uint32 minType, Uint32 maxType);
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diff changeset
521
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diff changeset
522 /**
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Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
523 * This function clears events from the event queue
faa9fc8e7f67 General improvements for user custom event registration
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
524 */
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diff changeset
525 extern DECLSPEC void SDLCALL SDL_FlushEvent(Uint32 type);
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diff changeset
526 extern DECLSPEC void SDLCALL SDL_FlushEvents(Uint32 minType, Uint32 maxType);
0
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parents:
diff changeset
527
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diff changeset
528 /**
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parents: 3280
diff changeset
529 * \brief Polls for currently pending events.
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
530 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
531 * \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
diff changeset
532 *
d3baf5ac4e37 Partial fix for bug #859
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parents: 3280
diff changeset
533 * \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
534 * stored in that area.
0
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parents:
diff changeset
535 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
536 extern DECLSPEC int SDLCALL SDL_PollEvent(SDL_Event * event);
0
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parents:
diff changeset
537
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diff changeset
538 /**
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
539 * \brief Waits indefinitely for the next available event.
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Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
540 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
541 * \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
542 *
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
543 * \param event If not NULL, the next event is removed from the queue and
d3baf5ac4e37 Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents: 3280
diff changeset
544 * stored in that area.
0
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parents:
diff changeset
545 */
1895
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parents: 1358
diff changeset
546 extern DECLSPEC int SDLCALL SDL_WaitEvent(SDL_Event * event);
0
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parents:
diff changeset
547
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diff changeset
548 /**
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parents: 3280
diff changeset
549 * \brief Waits until the specified timeout (in milliseconds) for the next
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parents: 3280
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550 * available event.
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551 *
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552 * \return 1, or 0 if there was an error while waiting for events.
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553 *
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554 * \param event If not NULL, the next event is removed from the queue and
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555 * stored in that area.
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556 */
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557 extern DECLSPEC int SDLCALL SDL_WaitEventTimeout(SDL_Event * event,
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558 int timeout);
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559
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560 /**
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561 * \brief Add an event to the event queue.
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562 *
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563 * \return 1 on success, 0 if the event was filtered, or -1 if the event queue
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564 * was full or there was some other error.
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565 */
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566 extern DECLSPEC int SDLCALL SDL_PushEvent(SDL_Event * event);
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567
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568 typedef int (SDLCALL * SDL_EventFilter) (void *userdata, SDL_Event * event);
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569
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570 /**
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571 * Sets up a filter to process all events before they change internal state and
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572 * are posted to the internal event queue.
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573 *
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574 * The filter is protypted as:
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575 * \code
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576 * int SDL_EventFilter(void *userdata, SDL_Event * event);
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577 * \endcode
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578 *
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579 * If the filter returns 1, then the event will be added to the internal queue.
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580 * If it returns 0, then the event will be dropped from the queue, but the
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581 * internal state will still be updated. This allows selective filtering of
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582 * dynamically arriving events.
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583 *
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584 * \warning Be very careful of what you do in the event filter function, as
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585 * it may run in a different thread!
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586 *
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587 * There is one caveat when dealing with the ::SDL_QUITEVENT event type. The
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588 * event filter is only called when the window manager desires to close the
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589 * application window. If the event filter returns 1, then the window will
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590 * be closed, otherwise the window will remain open if possible.
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591 *
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592 * If the quit event is generated by an interrupt signal, it will bypass the
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593 * internal queue and be delivered to the application at the next event poll.
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594 */
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595 extern DECLSPEC void SDLCALL SDL_SetEventFilter(SDL_EventFilter filter,
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596 void *userdata);
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597
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598 /**
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599 * Return the current event filter - can be used to "chain" filters.
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600 * If there is no event filter set, this function returns SDL_FALSE.
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601 */
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602 extern DECLSPEC SDL_bool SDLCALL SDL_GetEventFilter(SDL_EventFilter * filter,
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603 void **userdata);
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604
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605 /**
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606 * Run the filter function on the current event queue, removing any
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607 * events for which the filter returns 0.
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608 */
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609 extern DECLSPEC void SDLCALL SDL_FilterEvents(SDL_EventFilter filter,
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610 void *userdata);
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611
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612 /*@{*/
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613 #define SDL_QUERY -1
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614 #define SDL_IGNORE 0
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615 #define SDL_DISABLE 0
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616 #define SDL_ENABLE 1
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617
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618 /**
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619 * This function allows you to set the state of processing certain events.
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620 * - If \c state is set to ::SDL_IGNORE, that event will be automatically
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621 * dropped from the event queue and will not event be filtered.
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622 * - If \c state is set to ::SDL_ENABLE, that event will be processed
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623 * normally.
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624 * - If \c state is set to ::SDL_QUERY, SDL_EventState() will return the
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625 * current processing state of the specified event.
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626 */
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627 extern DECLSPEC Uint8 SDLCALL SDL_EventState(Uint32 type, int state);
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628 /*@}*/
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629 #define SDL_GetEventState(type) SDL_EventState(type, SDL_QUERY)
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630
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631 /**
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632 * This function allocates a set of user-defined events, and returns
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633 * the beginning event number for that set of events.
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634 *
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635 * If there aren't enough user-defined events left, this function
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636 * returns (Uint32)-1
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637 */
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638 extern DECLSPEC Uint32 SDLCALL SDL_RegisterEvents(int numevents);
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639
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640 /* Ends C function definitions when using C++ */
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641 #ifdef __cplusplus
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642 /* *INDENT-OFF* */
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643 }
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644 /* *INDENT-ON* */
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645 #endif
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646 #include "close_code.h"
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647
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648 #endif /* _SDL_events_h */
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649
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650 /* vi: set ts=4 sw=4 expandtab: */