include/SDL_events.h
author Sam Lantinga <slouken@libsdl.org>
Sat, 02 Jan 2016 10:10:34 -0800
changeset 9998 f67cf37e9cd4
parent 9898 0da384bef562
child 10020 08b9e569e1ce
permissions -rw-r--r--
Updated copyright to 2016
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 
    22 /**
    23  *  \file SDL_events.h
    24  *
    25  *  Include file for SDL event handling.
    26  */
    27 
    28 #ifndef _SDL_events_h
    29 #define _SDL_events_h
    30 
    31 #include "SDL_stdinc.h"
    32 #include "SDL_error.h"
    33 #include "SDL_video.h"
    34 #include "SDL_keyboard.h"
    35 #include "SDL_mouse.h"
    36 #include "SDL_joystick.h"
    37 #include "SDL_gamecontroller.h"
    38 #include "SDL_quit.h"
    39 #include "SDL_gesture.h"
    40 #include "SDL_touch.h"
    41 
    42 #include "begin_code.h"
    43 /* Set up for C function definitions, even when using C++ */
    44 #ifdef __cplusplus
    45 extern "C" {
    46 #endif
    47 
    48 /* General keyboard/mouse state definitions */
    49 #define SDL_RELEASED    0
    50 #define SDL_PRESSED 1
    51 
    52 /**
    53  * \brief The types of events that can be delivered.
    54  */
    55 typedef enum
    56 {
    57     SDL_FIRSTEVENT     = 0,     /**< Unused (do not remove) */
    58 
    59     /* Application events */
    60     SDL_QUIT           = 0x100, /**< User-requested quit */
    61 
    62     /* These application events have special meaning on iOS, see README-ios.md for details */
    63     SDL_APP_TERMINATING,        /**< The application is being terminated by the OS
    64                                      Called on iOS in applicationWillTerminate()
    65                                      Called on Android in onDestroy()
    66                                 */
    67     SDL_APP_LOWMEMORY,          /**< The application is low on memory, free memory if possible.
    68                                      Called on iOS in applicationDidReceiveMemoryWarning()
    69                                      Called on Android in onLowMemory()
    70                                 */
    71     SDL_APP_WILLENTERBACKGROUND, /**< The application is about to enter the background
    72                                      Called on iOS in applicationWillResignActive()
    73                                      Called on Android in onPause()
    74                                 */
    75     SDL_APP_DIDENTERBACKGROUND, /**< The application did enter the background and may not get CPU for some time
    76                                      Called on iOS in applicationDidEnterBackground()
    77                                      Called on Android in onPause()
    78                                 */
    79     SDL_APP_WILLENTERFOREGROUND, /**< The application is about to enter the foreground
    80                                      Called on iOS in applicationWillEnterForeground()
    81                                      Called on Android in onResume()
    82                                 */
    83     SDL_APP_DIDENTERFOREGROUND, /**< The application is now interactive
    84                                      Called on iOS in applicationDidBecomeActive()
    85                                      Called on Android in onResume()
    86                                 */
    87 
    88     /* Window events */
    89     SDL_WINDOWEVENT    = 0x200, /**< Window state change */
    90     SDL_SYSWMEVENT,             /**< System specific event */
    91 
    92     /* Keyboard events */
    93     SDL_KEYDOWN        = 0x300, /**< Key pressed */
    94     SDL_KEYUP,                  /**< Key released */
    95     SDL_TEXTEDITING,            /**< Keyboard text editing (composition) */
    96     SDL_TEXTINPUT,              /**< Keyboard text input */
    97     SDL_KEYMAPCHANGED,          /**< Keymap changed due to a system event such as an
    98                                      input language or keyboard layout change.
    99                                 */
   100 
   101     /* Mouse events */
   102     SDL_MOUSEMOTION    = 0x400, /**< Mouse moved */
   103     SDL_MOUSEBUTTONDOWN,        /**< Mouse button pressed */
   104     SDL_MOUSEBUTTONUP,          /**< Mouse button released */
   105     SDL_MOUSEWHEEL,             /**< Mouse wheel motion */
   106 
   107     /* Joystick events */
   108     SDL_JOYAXISMOTION  = 0x600, /**< Joystick axis motion */
   109     SDL_JOYBALLMOTION,          /**< Joystick trackball motion */
   110     SDL_JOYHATMOTION,           /**< Joystick hat position change */
   111     SDL_JOYBUTTONDOWN,          /**< Joystick button pressed */
   112     SDL_JOYBUTTONUP,            /**< Joystick button released */
   113     SDL_JOYDEVICEADDED,         /**< A new joystick has been inserted into the system */
   114     SDL_JOYDEVICEREMOVED,       /**< An opened joystick has been removed */
   115 
   116     /* Game controller events */
   117     SDL_CONTROLLERAXISMOTION  = 0x650, /**< Game controller axis motion */
   118     SDL_CONTROLLERBUTTONDOWN,          /**< Game controller button pressed */
   119     SDL_CONTROLLERBUTTONUP,            /**< Game controller button released */
   120     SDL_CONTROLLERDEVICEADDED,         /**< A new Game controller has been inserted into the system */
   121     SDL_CONTROLLERDEVICEREMOVED,       /**< An opened Game controller has been removed */
   122     SDL_CONTROLLERDEVICEREMAPPED,      /**< The controller mapping was updated */
   123 
   124     /* Touch events */
   125     SDL_FINGERDOWN      = 0x700,
   126     SDL_FINGERUP,
   127     SDL_FINGERMOTION,
   128 
   129     /* Gesture events */
   130     SDL_DOLLARGESTURE   = 0x800,
   131     SDL_DOLLARRECORD,
   132     SDL_MULTIGESTURE,
   133 
   134     /* Clipboard events */
   135     SDL_CLIPBOARDUPDATE = 0x900, /**< The clipboard changed */
   136 
   137     /* Drag and drop events */
   138     SDL_DROPFILE        = 0x1000, /**< The system requests a file open */
   139 
   140     /* Audio hotplug events */
   141     SDL_AUDIODEVICEADDED = 0x1100, /**< A new audio device is available */
   142     SDL_AUDIODEVICEREMOVED,        /**< An audio device has been removed. */
   143 
   144     /* Render events */
   145     SDL_RENDER_TARGETS_RESET = 0x2000, /**< The render targets have been reset and their contents need to be updated */
   146     SDL_RENDER_DEVICE_RESET, /**< The device has been reset and all textures need to be recreated */
   147 
   148     /** Events ::SDL_USEREVENT through ::SDL_LASTEVENT are for your use,
   149      *  and should be allocated with SDL_RegisterEvents()
   150      */
   151     SDL_USEREVENT    = 0x8000,
   152 
   153     /**
   154      *  This last event is only for bounding internal arrays
   155      */
   156     SDL_LASTEVENT    = 0xFFFF
   157 } SDL_EventType;
   158 
   159 /**
   160  *  \brief Fields shared by every event
   161  */
   162 typedef struct SDL_CommonEvent
   163 {
   164     Uint32 type;
   165     Uint32 timestamp;
   166 } SDL_CommonEvent;
   167 
   168 /**
   169  *  \brief Window state change event data (event.window.*)
   170  */
   171 typedef struct SDL_WindowEvent
   172 {
   173     Uint32 type;        /**< ::SDL_WINDOWEVENT */
   174     Uint32 timestamp;
   175     Uint32 windowID;    /**< The associated window */
   176     Uint8 event;        /**< ::SDL_WindowEventID */
   177     Uint8 padding1;
   178     Uint8 padding2;
   179     Uint8 padding3;
   180     Sint32 data1;       /**< event dependent data */
   181     Sint32 data2;       /**< event dependent data */
   182 } SDL_WindowEvent;
   183 
   184 /**
   185  *  \brief Keyboard button event structure (event.key.*)
   186  */
   187 typedef struct SDL_KeyboardEvent
   188 {
   189     Uint32 type;        /**< ::SDL_KEYDOWN or ::SDL_KEYUP */
   190     Uint32 timestamp;
   191     Uint32 windowID;    /**< The window with keyboard focus, if any */
   192     Uint8 state;        /**< ::SDL_PRESSED or ::SDL_RELEASED */
   193     Uint8 repeat;       /**< Non-zero if this is a key repeat */
   194     Uint8 padding2;
   195     Uint8 padding3;
   196     SDL_Keysym keysym;  /**< The key that was pressed or released */
   197 } SDL_KeyboardEvent;
   198 
   199 #define SDL_TEXTEDITINGEVENT_TEXT_SIZE (32)
   200 /**
   201  *  \brief Keyboard text editing event structure (event.edit.*)
   202  */
   203 typedef struct SDL_TextEditingEvent
   204 {
   205     Uint32 type;                                /**< ::SDL_TEXTEDITING */
   206     Uint32 timestamp;
   207     Uint32 windowID;                            /**< The window with keyboard focus, if any */
   208     char text[SDL_TEXTEDITINGEVENT_TEXT_SIZE];  /**< The editing text */
   209     Sint32 start;                               /**< The start cursor of selected editing text */
   210     Sint32 length;                              /**< The length of selected editing text */
   211 } SDL_TextEditingEvent;
   212 
   213 
   214 #define SDL_TEXTINPUTEVENT_TEXT_SIZE (32)
   215 /**
   216  *  \brief Keyboard text input event structure (event.text.*)
   217  */
   218 typedef struct SDL_TextInputEvent
   219 {
   220     Uint32 type;                              /**< ::SDL_TEXTINPUT */
   221     Uint32 timestamp;
   222     Uint32 windowID;                          /**< The window with keyboard focus, if any */
   223     char text[SDL_TEXTINPUTEVENT_TEXT_SIZE];  /**< The input text */
   224 } SDL_TextInputEvent;
   225 
   226 /**
   227  *  \brief Mouse motion event structure (event.motion.*)
   228  */
   229 typedef struct SDL_MouseMotionEvent
   230 {
   231     Uint32 type;        /**< ::SDL_MOUSEMOTION */
   232     Uint32 timestamp;
   233     Uint32 windowID;    /**< The window with mouse focus, if any */
   234     Uint32 which;       /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
   235     Uint32 state;       /**< The current button state */
   236     Sint32 x;           /**< X coordinate, relative to window */
   237     Sint32 y;           /**< Y coordinate, relative to window */
   238     Sint32 xrel;        /**< The relative motion in the X direction */
   239     Sint32 yrel;        /**< The relative motion in the Y direction */
   240 } SDL_MouseMotionEvent;
   241 
   242 /**
   243  *  \brief Mouse button event structure (event.button.*)
   244  */
   245 typedef struct SDL_MouseButtonEvent
   246 {
   247     Uint32 type;        /**< ::SDL_MOUSEBUTTONDOWN or ::SDL_MOUSEBUTTONUP */
   248     Uint32 timestamp;
   249     Uint32 windowID;    /**< The window with mouse focus, if any */
   250     Uint32 which;       /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
   251     Uint8 button;       /**< The mouse button index */
   252     Uint8 state;        /**< ::SDL_PRESSED or ::SDL_RELEASED */
   253     Uint8 clicks;       /**< 1 for single-click, 2 for double-click, etc. */
   254     Uint8 padding1;
   255     Sint32 x;           /**< X coordinate, relative to window */
   256     Sint32 y;           /**< Y coordinate, relative to window */
   257 } SDL_MouseButtonEvent;
   258 
   259 /**
   260  *  \brief Mouse wheel event structure (event.wheel.*)
   261  */
   262 typedef struct SDL_MouseWheelEvent
   263 {
   264     Uint32 type;        /**< ::SDL_MOUSEWHEEL */
   265     Uint32 timestamp;
   266     Uint32 windowID;    /**< The window with mouse focus, if any */
   267     Uint32 which;       /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
   268     Sint32 x;           /**< The amount scrolled horizontally, positive to the right and negative to the left */
   269     Sint32 y;           /**< The amount scrolled vertically, positive away from the user and negative toward the user */
   270     Uint32 direction;   /**< Set to one of the SDL_MOUSEWHEEL_* defines. When FLIPPED the values in X and Y will be opposite. Multiply by -1 to change them back */
   271 } SDL_MouseWheelEvent;
   272 
   273 /**
   274  *  \brief Joystick axis motion event structure (event.jaxis.*)
   275  */
   276 typedef struct SDL_JoyAxisEvent
   277 {
   278     Uint32 type;        /**< ::SDL_JOYAXISMOTION */
   279     Uint32 timestamp;
   280     SDL_JoystickID which; /**< The joystick instance id */
   281     Uint8 axis;         /**< The joystick axis index */
   282     Uint8 padding1;
   283     Uint8 padding2;
   284     Uint8 padding3;
   285     Sint16 value;       /**< The axis value (range: -32768 to 32767) */
   286     Uint16 padding4;
   287 } SDL_JoyAxisEvent;
   288 
   289 /**
   290  *  \brief Joystick trackball motion event structure (event.jball.*)
   291  */
   292 typedef struct SDL_JoyBallEvent
   293 {
   294     Uint32 type;        /**< ::SDL_JOYBALLMOTION */
   295     Uint32 timestamp;
   296     SDL_JoystickID which; /**< The joystick instance id */
   297     Uint8 ball;         /**< The joystick trackball index */
   298     Uint8 padding1;
   299     Uint8 padding2;
   300     Uint8 padding3;
   301     Sint16 xrel;        /**< The relative motion in the X direction */
   302     Sint16 yrel;        /**< The relative motion in the Y direction */
   303 } SDL_JoyBallEvent;
   304 
   305 /**
   306  *  \brief Joystick hat position change event structure (event.jhat.*)
   307  */
   308 typedef struct SDL_JoyHatEvent
   309 {
   310     Uint32 type;        /**< ::SDL_JOYHATMOTION */
   311     Uint32 timestamp;
   312     SDL_JoystickID which; /**< The joystick instance id */
   313     Uint8 hat;          /**< The joystick hat index */
   314     Uint8 value;        /**< The hat position value.
   315                          *   \sa ::SDL_HAT_LEFTUP ::SDL_HAT_UP ::SDL_HAT_RIGHTUP
   316                          *   \sa ::SDL_HAT_LEFT ::SDL_HAT_CENTERED ::SDL_HAT_RIGHT
   317                          *   \sa ::SDL_HAT_LEFTDOWN ::SDL_HAT_DOWN ::SDL_HAT_RIGHTDOWN
   318                          *
   319                          *   Note that zero means the POV is centered.
   320                          */
   321     Uint8 padding1;
   322     Uint8 padding2;
   323 } SDL_JoyHatEvent;
   324 
   325 /**
   326  *  \brief Joystick button event structure (event.jbutton.*)
   327  */
   328 typedef struct SDL_JoyButtonEvent
   329 {
   330     Uint32 type;        /**< ::SDL_JOYBUTTONDOWN or ::SDL_JOYBUTTONUP */
   331     Uint32 timestamp;
   332     SDL_JoystickID which; /**< The joystick instance id */
   333     Uint8 button;       /**< The joystick button index */
   334     Uint8 state;        /**< ::SDL_PRESSED or ::SDL_RELEASED */
   335     Uint8 padding1;
   336     Uint8 padding2;
   337 } SDL_JoyButtonEvent;
   338 
   339 /**
   340  *  \brief Joystick device event structure (event.jdevice.*)
   341  */
   342 typedef struct SDL_JoyDeviceEvent
   343 {
   344     Uint32 type;        /**< ::SDL_JOYDEVICEADDED or ::SDL_JOYDEVICEREMOVED */
   345     Uint32 timestamp;
   346     Sint32 which;       /**< The joystick device index for the ADDED event, instance id for the REMOVED event */
   347 } SDL_JoyDeviceEvent;
   348 
   349 
   350 /**
   351  *  \brief Game controller axis motion event structure (event.caxis.*)
   352  */
   353 typedef struct SDL_ControllerAxisEvent
   354 {
   355     Uint32 type;        /**< ::SDL_CONTROLLERAXISMOTION */
   356     Uint32 timestamp;
   357     SDL_JoystickID which; /**< The joystick instance id */
   358     Uint8 axis;         /**< The controller axis (SDL_GameControllerAxis) */
   359     Uint8 padding1;
   360     Uint8 padding2;
   361     Uint8 padding3;
   362     Sint16 value;       /**< The axis value (range: -32768 to 32767) */
   363     Uint16 padding4;
   364 } SDL_ControllerAxisEvent;
   365 
   366 
   367 /**
   368  *  \brief Game controller button event structure (event.cbutton.*)
   369  */
   370 typedef struct SDL_ControllerButtonEvent
   371 {
   372     Uint32 type;        /**< ::SDL_CONTROLLERBUTTONDOWN or ::SDL_CONTROLLERBUTTONUP */
   373     Uint32 timestamp;
   374     SDL_JoystickID which; /**< The joystick instance id */
   375     Uint8 button;       /**< The controller button (SDL_GameControllerButton) */
   376     Uint8 state;        /**< ::SDL_PRESSED or ::SDL_RELEASED */
   377     Uint8 padding1;
   378     Uint8 padding2;
   379 } SDL_ControllerButtonEvent;
   380 
   381 
   382 /**
   383  *  \brief Controller device event structure (event.cdevice.*)
   384  */
   385 typedef struct SDL_ControllerDeviceEvent
   386 {
   387     Uint32 type;        /**< ::SDL_CONTROLLERDEVICEADDED, ::SDL_CONTROLLERDEVICEREMOVED, or ::SDL_CONTROLLERDEVICEREMAPPED */
   388     Uint32 timestamp;
   389     Sint32 which;       /**< The joystick device index for the ADDED event, instance id for the REMOVED or REMAPPED event */
   390 } SDL_ControllerDeviceEvent;
   391 
   392 /**
   393  *  \brief Audio device event structure (event.adevice.*)
   394  */
   395 typedef struct SDL_AudioDeviceEvent
   396 {
   397     Uint32 type;        /**< ::SDL_AUDIODEVICEADDED, or ::SDL_AUDIODEVICEREMOVED */
   398     Uint32 timestamp;
   399     Uint32 which;       /**< The audio device index for the ADDED event (valid until next SDL_GetNumAudioDevices() call), SDL_AudioDeviceID for the REMOVED event */
   400     Uint8 iscapture;    /**< zero if an output device, non-zero if a capture device. */
   401     Uint8 padding1;
   402     Uint8 padding2;
   403     Uint8 padding3;
   404 } SDL_AudioDeviceEvent;
   405 
   406 
   407 /**
   408  *  \brief Touch finger event structure (event.tfinger.*)
   409  */
   410 typedef struct SDL_TouchFingerEvent
   411 {
   412     Uint32 type;        /**< ::SDL_FINGERMOTION or ::SDL_FINGERDOWN or ::SDL_FINGERUP */
   413     Uint32 timestamp;
   414     SDL_TouchID touchId; /**< The touch device id */
   415     SDL_FingerID fingerId;
   416     float x;            /**< Normalized in the range 0...1 */
   417     float y;            /**< Normalized in the range 0...1 */
   418     float dx;           /**< Normalized in the range -1...1 */
   419     float dy;           /**< Normalized in the range -1...1 */
   420     float pressure;     /**< Normalized in the range 0...1 */
   421 } SDL_TouchFingerEvent;
   422 
   423 
   424 /**
   425  *  \brief Multiple Finger Gesture Event (event.mgesture.*)
   426  */
   427 typedef struct SDL_MultiGestureEvent
   428 {
   429     Uint32 type;        /**< ::SDL_MULTIGESTURE */
   430     Uint32 timestamp;
   431     SDL_TouchID touchId; /**< The touch device index */
   432     float dTheta;
   433     float dDist;
   434     float x;
   435     float y;
   436     Uint16 numFingers;
   437     Uint16 padding;
   438 } SDL_MultiGestureEvent;
   439 
   440 
   441 /**
   442  * \brief Dollar Gesture Event (event.dgesture.*)
   443  */
   444 typedef struct SDL_DollarGestureEvent
   445 {
   446     Uint32 type;        /**< ::SDL_DOLLARGESTURE or ::SDL_DOLLARRECORD */
   447     Uint32 timestamp;
   448     SDL_TouchID touchId; /**< The touch device id */
   449     SDL_GestureID gestureId;
   450     Uint32 numFingers;
   451     float error;
   452     float x;            /**< Normalized center of gesture */
   453     float y;            /**< Normalized center of gesture */
   454 } SDL_DollarGestureEvent;
   455 
   456 
   457 /**
   458  *  \brief An event used to request a file open by the system (event.drop.*)
   459  *         This event is enabled by default, you can disable it with SDL_EventState().
   460  *  \note If this event is enabled, you must free the filename in the event.
   461  */
   462 typedef struct SDL_DropEvent
   463 {
   464     Uint32 type;        /**< ::SDL_DROPFILE */
   465     Uint32 timestamp;
   466     char *file;         /**< The file name, which should be freed with SDL_free() */
   467 } SDL_DropEvent;
   468 
   469 
   470 /**
   471  *  \brief The "quit requested" event
   472  */
   473 typedef struct SDL_QuitEvent
   474 {
   475     Uint32 type;        /**< ::SDL_QUIT */
   476     Uint32 timestamp;
   477 } SDL_QuitEvent;
   478 
   479 /**
   480  *  \brief OS Specific event
   481  */
   482 typedef struct SDL_OSEvent
   483 {
   484     Uint32 type;        /**< ::SDL_QUIT */
   485     Uint32 timestamp;
   486 } SDL_OSEvent;
   487 
   488 /**
   489  *  \brief A user-defined event type (event.user.*)
   490  */
   491 typedef struct SDL_UserEvent
   492 {
   493     Uint32 type;        /**< ::SDL_USEREVENT through ::SDL_LASTEVENT-1 */
   494     Uint32 timestamp;
   495     Uint32 windowID;    /**< The associated window if any */
   496     Sint32 code;        /**< User defined event code */
   497     void *data1;        /**< User defined data pointer */
   498     void *data2;        /**< User defined data pointer */
   499 } SDL_UserEvent;
   500 
   501 
   502 struct SDL_SysWMmsg;
   503 typedef struct SDL_SysWMmsg SDL_SysWMmsg;
   504 
   505 /**
   506  *  \brief A video driver dependent system event (event.syswm.*)
   507  *         This event is disabled by default, you can enable it with SDL_EventState()
   508  *
   509  *  \note If you want to use this event, you should include SDL_syswm.h.
   510  */
   511 typedef struct SDL_SysWMEvent
   512 {
   513     Uint32 type;        /**< ::SDL_SYSWMEVENT */
   514     Uint32 timestamp;
   515     SDL_SysWMmsg *msg;  /**< driver dependent data, defined in SDL_syswm.h */
   516 } SDL_SysWMEvent;
   517 
   518 /**
   519  *  \brief General event structure
   520  */
   521 typedef union SDL_Event
   522 {
   523     Uint32 type;                    /**< Event type, shared with all events */
   524     SDL_CommonEvent common;         /**< Common event data */
   525     SDL_WindowEvent window;         /**< Window event data */
   526     SDL_KeyboardEvent key;          /**< Keyboard event data */
   527     SDL_TextEditingEvent edit;      /**< Text editing event data */
   528     SDL_TextInputEvent text;        /**< Text input event data */
   529     SDL_MouseMotionEvent motion;    /**< Mouse motion event data */
   530     SDL_MouseButtonEvent button;    /**< Mouse button event data */
   531     SDL_MouseWheelEvent wheel;      /**< Mouse wheel event data */
   532     SDL_JoyAxisEvent jaxis;         /**< Joystick axis event data */
   533     SDL_JoyBallEvent jball;         /**< Joystick ball event data */
   534     SDL_JoyHatEvent jhat;           /**< Joystick hat event data */
   535     SDL_JoyButtonEvent jbutton;     /**< Joystick button event data */
   536     SDL_JoyDeviceEvent jdevice;     /**< Joystick device change event data */
   537     SDL_ControllerAxisEvent caxis;      /**< Game Controller axis event data */
   538     SDL_ControllerButtonEvent cbutton;  /**< Game Controller button event data */
   539     SDL_ControllerDeviceEvent cdevice;  /**< Game Controller device event data */
   540     SDL_AudioDeviceEvent adevice;   /**< Audio device event data */
   541     SDL_QuitEvent quit;             /**< Quit request event data */
   542     SDL_UserEvent user;             /**< Custom event data */
   543     SDL_SysWMEvent syswm;           /**< System dependent window event data */
   544     SDL_TouchFingerEvent tfinger;   /**< Touch finger event data */
   545     SDL_MultiGestureEvent mgesture; /**< Gesture event data */
   546     SDL_DollarGestureEvent dgesture; /**< Gesture event data */
   547     SDL_DropEvent drop;             /**< Drag and drop event data */
   548 
   549     /* This is necessary for ABI compatibility between Visual C++ and GCC
   550        Visual C++ will respect the push pack pragma and use 52 bytes for
   551        this structure, and GCC will use the alignment of the largest datatype
   552        within the union, which is 8 bytes.
   553 
   554        So... we'll add padding to force the size to be 56 bytes for both.
   555     */
   556     Uint8 padding[56];
   557 } SDL_Event;
   558 
   559 
   560 /* Function prototypes */
   561 
   562 /**
   563  *  Pumps the event loop, gathering events from the input devices.
   564  *
   565  *  This function updates the event queue and internal input device state.
   566  *
   567  *  This should only be run in the thread that sets the video mode.
   568  */
   569 extern DECLSPEC void SDLCALL SDL_PumpEvents(void);
   570 
   571 /* @{ */
   572 typedef enum
   573 {
   574     SDL_ADDEVENT,
   575     SDL_PEEKEVENT,
   576     SDL_GETEVENT
   577 } SDL_eventaction;
   578 
   579 /**
   580  *  Checks the event queue for messages and optionally returns them.
   581  *
   582  *  If \c action is ::SDL_ADDEVENT, up to \c numevents events will be added to
   583  *  the back of the event queue.
   584  *
   585  *  If \c action is ::SDL_PEEKEVENT, up to \c numevents events at the front
   586  *  of the event queue, within the specified minimum and maximum type,
   587  *  will be returned and will not be removed from the queue.
   588  *
   589  *  If \c action is ::SDL_GETEVENT, up to \c numevents events at the front
   590  *  of the event queue, within the specified minimum and maximum type,
   591  *  will be returned and will be removed from the queue.
   592  *
   593  *  \return The number of events actually stored, or -1 if there was an error.
   594  *
   595  *  This function is thread-safe.
   596  */
   597 extern DECLSPEC int SDLCALL SDL_PeepEvents(SDL_Event * events, int numevents,
   598                                            SDL_eventaction action,
   599                                            Uint32 minType, Uint32 maxType);
   600 /* @} */
   601 
   602 /**
   603  *  Checks to see if certain event types are in the event queue.
   604  */
   605 extern DECLSPEC SDL_bool SDLCALL SDL_HasEvent(Uint32 type);
   606 extern DECLSPEC SDL_bool SDLCALL SDL_HasEvents(Uint32 minType, Uint32 maxType);
   607 
   608 /**
   609  *  This function clears events from the event queue
   610  *  This function only affects currently queued events. If you want to make
   611  *  sure that all pending OS events are flushed, you can call SDL_PumpEvents()
   612  *  on the main thread immediately before the flush call.
   613  */
   614 extern DECLSPEC void SDLCALL SDL_FlushEvent(Uint32 type);
   615 extern DECLSPEC void SDLCALL SDL_FlushEvents(Uint32 minType, Uint32 maxType);
   616 
   617 /**
   618  *  \brief Polls for currently pending events.
   619  *
   620  *  \return 1 if there are any pending events, or 0 if there are none available.
   621  *
   622  *  \param event If not NULL, the next event is removed from the queue and
   623  *               stored in that area.
   624  */
   625 extern DECLSPEC int SDLCALL SDL_PollEvent(SDL_Event * event);
   626 
   627 /**
   628  *  \brief Waits indefinitely for the next available event.
   629  *
   630  *  \return 1, or 0 if there was an error while waiting for events.
   631  *
   632  *  \param event If not NULL, the next event is removed from the queue and
   633  *               stored in that area.
   634  */
   635 extern DECLSPEC int SDLCALL SDL_WaitEvent(SDL_Event * event);
   636 
   637 /**
   638  *  \brief Waits until the specified timeout (in milliseconds) for the next
   639  *         available event.
   640  *
   641  *  \return 1, or 0 if there was an error while waiting for events.
   642  *
   643  *  \param event If not NULL, the next event is removed from the queue and
   644  *               stored in that area.
   645  *  \param timeout The timeout (in milliseconds) to wait for next event.
   646  */
   647 extern DECLSPEC int SDLCALL SDL_WaitEventTimeout(SDL_Event * event,
   648                                                  int timeout);
   649 
   650 /**
   651  *  \brief Add an event to the event queue.
   652  *
   653  *  \return 1 on success, 0 if the event was filtered, or -1 if the event queue
   654  *          was full or there was some other error.
   655  */
   656 extern DECLSPEC int SDLCALL SDL_PushEvent(SDL_Event * event);
   657 
   658 typedef int (SDLCALL * SDL_EventFilter) (void *userdata, SDL_Event * event);
   659 
   660 /**
   661  *  Sets up a filter to process all events before they change internal state and
   662  *  are posted to the internal event queue.
   663  *
   664  *  The filter is prototyped as:
   665  *  \code
   666  *      int SDL_EventFilter(void *userdata, SDL_Event * event);
   667  *  \endcode
   668  *
   669  *  If the filter returns 1, then the event will be added to the internal queue.
   670  *  If it returns 0, then the event will be dropped from the queue, but the
   671  *  internal state will still be updated.  This allows selective filtering of
   672  *  dynamically arriving events.
   673  *
   674  *  \warning  Be very careful of what you do in the event filter function, as
   675  *            it may run in a different thread!
   676  *
   677  *  There is one caveat when dealing with the ::SDL_QuitEvent event type.  The
   678  *  event filter is only called when the window manager desires to close the
   679  *  application window.  If the event filter returns 1, then the window will
   680  *  be closed, otherwise the window will remain open if possible.
   681  *
   682  *  If the quit event is generated by an interrupt signal, it will bypass the
   683  *  internal queue and be delivered to the application at the next event poll.
   684  */
   685 extern DECLSPEC void SDLCALL SDL_SetEventFilter(SDL_EventFilter filter,
   686                                                 void *userdata);
   687 
   688 /**
   689  *  Return the current event filter - can be used to "chain" filters.
   690  *  If there is no event filter set, this function returns SDL_FALSE.
   691  */
   692 extern DECLSPEC SDL_bool SDLCALL SDL_GetEventFilter(SDL_EventFilter * filter,
   693                                                     void **userdata);
   694 
   695 /**
   696  *  Add a function which is called when an event is added to the queue.
   697  */
   698 extern DECLSPEC void SDLCALL SDL_AddEventWatch(SDL_EventFilter filter,
   699                                                void *userdata);
   700 
   701 /**
   702  *  Remove an event watch function added with SDL_AddEventWatch()
   703  */
   704 extern DECLSPEC void SDLCALL SDL_DelEventWatch(SDL_EventFilter filter,
   705                                                void *userdata);
   706 
   707 /**
   708  *  Run the filter function on the current event queue, removing any
   709  *  events for which the filter returns 0.
   710  */
   711 extern DECLSPEC void SDLCALL SDL_FilterEvents(SDL_EventFilter filter,
   712                                               void *userdata);
   713 
   714 /* @{ */
   715 #define SDL_QUERY   -1
   716 #define SDL_IGNORE   0
   717 #define SDL_DISABLE  0
   718 #define SDL_ENABLE   1
   719 
   720 /**
   721  *  This function allows you to set the state of processing certain events.
   722  *   - If \c state is set to ::SDL_IGNORE, that event will be automatically
   723  *     dropped from the event queue and will not event be filtered.
   724  *   - If \c state is set to ::SDL_ENABLE, that event will be processed
   725  *     normally.
   726  *   - If \c state is set to ::SDL_QUERY, SDL_EventState() will return the
   727  *     current processing state of the specified event.
   728  */
   729 extern DECLSPEC Uint8 SDLCALL SDL_EventState(Uint32 type, int state);
   730 /* @} */
   731 #define SDL_GetEventState(type) SDL_EventState(type, SDL_QUERY)
   732 
   733 /**
   734  *  This function allocates a set of user-defined events, and returns
   735  *  the beginning event number for that set of events.
   736  *
   737  *  If there aren't enough user-defined events left, this function
   738  *  returns (Uint32)-1
   739  */
   740 extern DECLSPEC Uint32 SDLCALL SDL_RegisterEvents(int numevents);
   741 
   742 /* Ends C function definitions when using C++ */
   743 #ifdef __cplusplus
   744 }
   745 #endif
   746 #include "close_code.h"
   747 
   748 #endif /* _SDL_events_h */
   749 
   750 /* vi: set ts=4 sw=4 expandtab: */