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annotate include/SDL_events.h @ 1662:782fd950bd46 SDL-1.3

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Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents c71e05b4dc2e
children 4da1ee79c9af
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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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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 * \enum SDL_EventType
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54 *
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55 * \brief The types of events that can be delivered
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56 */
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57 typedef enum
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58 {
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59 SDL_NOEVENT = 0, /**< Unused (do not remove) */
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60 SDL_WINDOWEVENT, /**< Window state change */
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61 SDL_KEYDOWN, /**< Keys pressed */
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62 SDL_KEYUP, /**< Keys released */
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63 SDL_MOUSEMOTION, /**< Mouse moved */
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64 SDL_MOUSEBUTTONDOWN, /**< Mouse button pressed */
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65 SDL_MOUSEBUTTONUP, /**< Mouse button released */
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66 SDL_JOYAXISMOTION, /**< Joystick axis motion */
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67 SDL_JOYBALLMOTION, /**< Joystick trackball motion */
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68 SDL_JOYHATMOTION, /**< Joystick hat position change */
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69 SDL_JOYBUTTONDOWN, /**< Joystick button pressed */
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70 SDL_JOYBUTTONUP, /**< Joystick button released */
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71 SDL_QUIT, /**< User-requested quit */
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72 SDL_SYSWMEVENT, /**< System specific event */
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73 SDL_EVENT_RESERVED1, /**< Reserved for future use... */
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74 SDL_EVENT_RESERVED2, /**< Reserved for future use... */
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75 SDL_EVENT_RESERVED3, /**< Reserved for future use... */
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76 /* Events SDL_USEREVENT through SDL_MAXEVENTS-1 are for your use */
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77 SDL_USEREVENT = 24,
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78 /* This last event is only for bounding internal arrays
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79 It is the number of bits in the event mask datatype -- Uint32
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80 */
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81 SDL_NUMEVENTS = 32
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82 } SDL_EventType;
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83
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84 /**
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85 * \enum SDL_EventMask
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86 *
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87 * \brief Predefined event masks
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88 */
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89 #define SDL_EVENTMASK(X) (1<<(X))
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90 typedef enum
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91 {
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92 SDL_WINDOWEVENTMASK = SDL_EVENTMASK (SDL_WINDOWEVENT),
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93 SDL_KEYDOWNMASK = SDL_EVENTMASK (SDL_KEYDOWN),
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94 SDL_KEYUPMASK = SDL_EVENTMASK (SDL_KEYUP),
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95 SDL_KEYEVENTMASK = SDL_EVENTMASK (SDL_KEYDOWN) |
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96 SDL_EVENTMASK (SDL_KEYUP),
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97 SDL_MOUSEMOTIONMASK = SDL_EVENTMASK (SDL_MOUSEMOTION),
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98 SDL_MOUSEBUTTONDOWNMASK = SDL_EVENTMASK (SDL_MOUSEBUTTONDOWN),
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99 SDL_MOUSEBUTTONUPMASK = SDL_EVENTMASK (SDL_MOUSEBUTTONUP),
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100 SDL_MOUSEEVENTMASK = SDL_EVENTMASK (SDL_MOUSEMOTION) |
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101 SDL_EVENTMASK (SDL_MOUSEBUTTONDOWN) |
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102 SDL_EVENTMASK (SDL_MOUSEBUTTONUP),
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103 SDL_JOYAXISMOTIONMASK = SDL_EVENTMASK (SDL_JOYAXISMOTION),
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104 SDL_JOYBALLMOTIONMASK = SDL_EVENTMASK (SDL_JOYBALLMOTION),
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105 SDL_JOYHATMOTIONMASK = SDL_EVENTMASK (SDL_JOYHATMOTION),
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106 SDL_JOYBUTTONDOWNMASK = SDL_EVENTMASK (SDL_JOYBUTTONDOWN),
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107 SDL_JOYBUTTONUPMASK = SDL_EVENTMASK (SDL_JOYBUTTONUP),
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108 SDL_JOYEVENTMASK = SDL_EVENTMASK (SDL_JOYAXISMOTION) |
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109 SDL_EVENTMASK (SDL_JOYBALLMOTION) |
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110 SDL_EVENTMASK (SDL_JOYHATMOTION) |
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111 SDL_EVENTMASK (SDL_JOYBUTTONDOWN) | SDL_EVENTMASK (SDL_JOYBUTTONUP),
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112 SDL_QUITMASK = SDL_EVENTMASK (SDL_QUIT),
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113 SDL_SYSWMEVENTMASK = SDL_EVENTMASK (SDL_SYSWMEVENT)
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114 } SDL_EventMask;
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115 #define SDL_ALLEVENTS 0xFFFFFFFF
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116
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117 /**
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118 * \struct SDL_WindowEvent
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119 *
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120 * \brief Window state change event data
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121 */
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122 typedef struct SDL_WindowEvent
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123 {
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124 Uint8 type; /**< SDL_WINDOWEVENT */
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125 Uint8 event; /**< SDL_WindowEventID */
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126 int data1; /**< event dependent data */
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127 int data2; /**< event dependent data */
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128 SDL_WindowID windowID; /**< The associated window */
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129 } SDL_WindowEvent;
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130
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131 /**
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132 * \struct SDL_KeyboardEvent
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133 *
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134 * \brief Keyboard event structure
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135 */
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136 typedef struct SDL_KeyboardEvent
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137 {
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138 Uint8 type; /**< SDL_KEYDOWN or SDL_KEYUP */
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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 SDL_keysym keysym; /**< The key that was pressed or released */
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142 SDL_WindowID windowID; /**< The window with keyboard focus, if any */
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143 } SDL_KeyboardEvent;
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144
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145 /**
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146 * \struct SDL_MouseMotionEvent
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147 *
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148 * \brief Mouse motion event structure
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149 */
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150 typedef struct SDL_MouseMotionEvent
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151 {
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152 Uint8 type; /**< SDL_MOUSEMOTION */
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153 Uint8 which; /**< The mouse device index */
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154 Uint8 state; /**< The current button state */
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155 int x; /**< X coordinate, relative to window */
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156 int y; /**< Y coordinate, relative to window */
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157 int xrel; /**< The relative motion in the X direction */
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158 int yrel; /**< The relative motion in the Y direction */
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159 SDL_WindowID windowID; /**< The window with mouse focus, if any */
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160 } SDL_MouseMotionEvent;
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161
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162 /**
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163 * \struct SDL_MouseButtonEvent
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164 *
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165 * \brief Mouse button event structure
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166 */
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167 typedef struct SDL_MouseButtonEvent
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168 {
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169 Uint8 type; /**< SDL_MOUSEBUTTONDOWN or SDL_MOUSEBUTTONUP */
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170 Uint8 which; /**< The mouse device index */
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171 Uint8 button; /**< The mouse button index */
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172 Uint8 state; /**< SDL_PRESSED or SDL_RELEASED */
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173 int x; /**< X coordinate, relative to window */
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174 int y; /**< Y coordinate, relative to window */
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175 SDL_WindowID windowID; /**< The window with mouse focus, if any */
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176 } SDL_MouseButtonEvent;
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177
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178 /**
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179 * \struct SDL_JoyAxisEvent
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180 *
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181 * \brief Joystick axis motion event structure
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182 */
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183 typedef struct SDL_JoyAxisEvent
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184 {
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185 Uint8 type; /**< SDL_JOYAXISMOTION */
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186 Uint8 which; /**< The joystick device index */
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187 Uint8 axis; /**< The joystick axis index */
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188 int value; /**< The axis value (range: -32768 to 32767) */
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189 } SDL_JoyAxisEvent;
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190
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191 /**
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192 * \struct SDL_JoyBallEvent
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193 *
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194 * \brief Joystick trackball motion event structure
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195 */
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196 typedef struct SDL_JoyBallEvent
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197 {
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198 Uint8 type; /**< SDL_JOYBALLMOTION */
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199 Uint8 which; /**< The joystick device index */
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200 Uint8 ball; /**< The joystick trackball index */
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201 int xrel; /**< The relative motion in the X direction */
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202 int yrel; /**< The relative motion in the Y direction */
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203 } SDL_JoyBallEvent;
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204
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205 /**
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206 * \struct SDL_JoyHatEvent
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207 *
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208 * \brief Joystick hat position change event structure
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209 */
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210 typedef struct SDL_JoyHatEvent
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211 {
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212 Uint8 type; /**< SDL_JOYHATMOTION */
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213 Uint8 which; /**< The joystick device index */
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214 Uint8 hat; /**< The joystick hat index */
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215 Uint8 value; /**< The hat position value:
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216 SDL_HAT_LEFTUP SDL_HAT_UP SDL_HAT_RIGHTUP
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217 SDL_HAT_LEFT SDL_HAT_CENTERED SDL_HAT_RIGHT
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218 SDL_HAT_LEFTDOWN SDL_HAT_DOWN SDL_HAT_RIGHTDOWN
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219 Note that zero means the POV is centered.
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220 */
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221 } SDL_JoyHatEvent;
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222
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223 /**
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224 * \struct SDL_JoyButtonEvent
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225 *
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226 * \brief Joystick button event structure
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227 */
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228 typedef struct SDL_JoyButtonEvent
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229 {
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230 Uint8 type; /**< SDL_JOYBUTTONDOWN or SDL_JOYBUTTONUP */
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231 Uint8 which; /**< The joystick device index */
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232 Uint8 button; /**< The joystick button index */
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233 Uint8 state; /**< SDL_PRESSED or SDL_RELEASED */
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234 } SDL_JoyButtonEvent;
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235
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236 /**
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237 * \struct SDL_QuitEvent
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238 *
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239 * \brief The "quit requested" event
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240 */
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241 typedef struct SDL_QuitEvent
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242 {
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243 Uint8 type; /**< SDL_QUIT */
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244 } SDL_QuitEvent;
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245
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246 /**
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247 * \struct SDL_UserEvent
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248 *
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249 * \brief A user-defined event type
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250 */
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251 typedef struct SDL_UserEvent
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252 {
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253 Uint8 type; /**< SDL_USEREVENT through SDL_NUMEVENTS-1 */
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254 int code; /**< User defined event code */
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255 void *data1; /**< User defined data pointer */
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256 void *data2; /**< User defined data pointer */
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257 } SDL_UserEvent;
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258
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259 /**
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260 * \struct SDL_SysWMEvent
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261 *
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262 * \brief A video driver dependent system event
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263 *
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264 * \note If you want to use this event, you should include SDL_syswm.h
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265 */
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266 struct SDL_SysWMmsg;
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267 typedef struct SDL_SysWMmsg SDL_SysWMmsg;
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268 typedef struct SDL_SysWMEvent
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269 {
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270 Uint8 type; /**< SDL_SYSWMEVENT */
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271 SDL_SysWMmsg *msg; /**< driver dependent data, defined in SDL_syswm.h */
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272 } SDL_SysWMEvent;
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273
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274 /**
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275 * \union SDL_Event
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276 *
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277 * \brief General event structure
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278 */
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279 typedef union SDL_Event
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280 {
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281 Uint8 type; /**< Event type, shared with all events */
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282 SDL_WindowEvent window; /**< Window event data */
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283 SDL_KeyboardEvent key; /**< Keyboard event data */
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284 SDL_MouseMotionEvent motion; /**< Mouse motion event data */
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285 SDL_MouseButtonEvent button; /**< Mouse button event data */
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286 SDL_JoyAxisEvent jaxis; /**< Joystick axis event data */
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287 SDL_JoyBallEvent jball; /**< Joystick ball event data */
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288 SDL_JoyHatEvent jhat; /**< Joystick hat event data */
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289 SDL_JoyButtonEvent jbutton; /**< Joystick button event data */
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290 SDL_QuitEvent quit; /**< Quit request event data */
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291 SDL_UserEvent user; /**< Custom event data */
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292 SDL_SysWMEvent syswm; /**< System dependent window event data */
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293 } SDL_Event;
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294
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295
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296 /* Function prototypes */
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297
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298 /* Pumps the event loop, gathering events from the input devices.
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299 This function updates the event queue and internal input device state.
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300 This should only be run in the thread that sets the video mode.
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301 */
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302 extern DECLSPEC void SDLCALL SDL_PumpEvents (void);
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303
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304 /* Checks the event queue for messages and optionally returns them.
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305 If 'action' is SDL_ADDEVENT, up to 'numevents' events will be added to
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306 the back of the event queue.
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307 If 'action' is SDL_PEEKEVENT, up to 'numevents' events at the front
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308 of the event queue, matching 'mask', will be returned and will not
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309 be removed from the queue.
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310 If 'action' is SDL_GETEVENT, up to 'numevents' events at the front
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311 of the event queue, matching 'mask', will be returned and will be
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312 removed from the queue.
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313 This function returns the number of events actually stored, or -1
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314 if there was an error. This function is thread-safe.
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315 */
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316 typedef enum
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317 {
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318 SDL_ADDEVENT,
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319 SDL_PEEKEVENT,
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320 SDL_GETEVENT
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321 } SDL_eventaction;
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322 /* */
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323 extern DECLSPEC int SDLCALL SDL_PeepEvents (SDL_Event * events, int numevents,
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324 SDL_eventaction action,
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325 Uint32 mask);
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326
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327 /* Polls for currently pending events, and returns 1 if there are any pending
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328 events, or 0 if there are none available. If 'event' is not NULL, the next
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329 event is removed from the queue and stored in that area.
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330 */
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331 extern DECLSPEC int SDLCALL SDL_PollEvent (SDL_Event * event);
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332
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333 /* Waits indefinitely for the next available event, returning 1, or 0 if there
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334 was an error while waiting for events. If 'event' is not NULL, the next
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335 event is removed from the queue and stored in that area.
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336 */
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337 extern DECLSPEC int SDLCALL SDL_WaitEvent (SDL_Event * event);
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338
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339 /* Add an event to the event queue.
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340 This function returns 0 on success, or -1 if the event queue was full
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341 or there was some other error.
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342 */
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343 extern DECLSPEC int SDLCALL SDL_PushEvent (SDL_Event * event);
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344
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345 /*
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346 This function sets up a filter to process all events before they
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347 change internal state and are posted to the internal event queue.
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348
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349 The filter is protypted as:
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350 */
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351 typedef int (SDLCALL * SDL_EventFilter) (const SDL_Event * event);
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352 /*
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353 If the filter returns 1, then the event will be added to the internal queue.
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354 If it returns 0, then the event will be dropped from the queue, but the
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355 internal state will still be updated. This allows selective filtering of
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356 dynamically arriving events.
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357
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358 WARNING: Be very careful of what you do in the event filter function, as
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359 it may run in a different thread!
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360
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361 There is one caveat when dealing with the SDL_QUITEVENT event type. The
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362 event filter is only called when the window manager desires to close the
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363 application window. If the event filter returns 1, then the window will
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364 be closed, otherwise the window will remain open if possible.
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365 If the quit event is generated by an interrupt signal, it will bypass the
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366 internal queue and be delivered to the application at the next event poll.
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367 */
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368 extern DECLSPEC void SDLCALL SDL_SetEventFilter (SDL_EventFilter filter);
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369
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370 /*
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371 Return the current event filter - can be used to "chain" filters.
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372 If there is no event filter set, this function returns NULL.
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373 */
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374 extern DECLSPEC SDL_EventFilter SDLCALL SDL_GetEventFilter (void);
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375
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376 /*
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377 This function allows you to set the state of processing certain events.
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378 If 'state' is set to SDL_IGNORE, that event will be automatically dropped
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379 from the event queue and will not event be filtered.
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380 If 'state' is set to SDL_ENABLE, that event will be processed normally.
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381 If 'state' is set to SDL_QUERY, SDL_EventState() will return the
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382 current processing state of the specified event.
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383 */
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384 #define SDL_QUERY -1
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385 #define SDL_IGNORE 0
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386 #define SDL_DISABLE 0
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387 #define SDL_ENABLE 1
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388 extern DECLSPEC Uint8 SDLCALL SDL_EventState (Uint8 type, int state);
0
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389
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390
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391 /* Ends C function definitions when using C++ */
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392 #ifdef __cplusplus
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393 /* *INDENT-OFF* */
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394 }
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395 /* *INDENT-ON* */
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396 #endif
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397 #include "close_code.h"
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398
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399 #endif /* _SDL_events_h */
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400
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401 /* vi: set ts=4 sw=4 expandtab: */