/*

  Simple DirectMedia Layer

  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied

  warranty.  In no event will the authors be held liable for any damages

  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,

  including commercial applications, and to alter it and redistribute it

  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not

     claim that you wrote the original software. If you use this software

     in a product, an acknowledgment in the product documentation would be

     appreciated but is not required.

  2. Altered source versions must be plainly marked as such, and must not be

     misrepresented as being the original software.

  3. This notice may not be removed or altered from any source distribution.

*/

/**

 *  \file SDL_events.h

 *  

 *  Include file for SDL event handling.

 */

#ifndef _SDL_events_h

#define _SDL_events_h

#include "SDL_stdinc.h"

#include "SDL_error.h"

#include "SDL_video.h"

#include "SDL_keyboard.h"

#include "SDL_mouse.h"

#include "SDL_joystick.h"

#include "SDL_quit.h"

#include "SDL_gesture.h"

#include "SDL_touch.h"

#include "begin_code.h"

/* Set up for C function definitions, even when using C++ */

#ifdef __cplusplus

/* *INDENT-OFF* */

extern "C" {

/* *INDENT-ON* */

#endif

/* General keyboard/mouse state definitions */

#define SDL_RELEASED	0

#define SDL_PRESSED	1

/**

 * \brief The types of events that can be delivered.

 */

typedef enum

{

    SDL_FIRSTEVENT     = 0,     /**< Unused (do not remove) */

    /* Application events */

    SDL_QUIT           = 0x100, /**< User-requested quit */

    /* Window events */

    SDL_WINDOWEVENT    = 0x200, /**< Window state change */

    SDL_SYSWMEVENT,             /**< System specific event */

    /* Keyboard events */

    SDL_KEYDOWN        = 0x300, /**< Key pressed */

    SDL_KEYUP,                  /**< Key released */

    SDL_TEXTEDITING,            /**< Keyboard text editing (composition) */

    SDL_TEXTINPUT,              /**< Keyboard text input */

    /* Mouse events */

    SDL_MOUSEMOTION    = 0x400, /**< Mouse moved */

    SDL_MOUSEBUTTONDOWN,        /**< Mouse button pressed */

    SDL_MOUSEBUTTONUP,          /**< Mouse button released */

    SDL_MOUSEWHEEL,             /**< Mouse wheel motion */

    /* Tablet or multiple mice input device events */

    SDL_INPUTMOTION    = 0x500, /**< Input moved */

    SDL_INPUTBUTTONDOWN,        /**< Input button pressed */

    SDL_INPUTBUTTONUP,          /**< Input button released */

    SDL_INPUTWHEEL,             /**< Input wheel motion */

    SDL_INPUTPROXIMITYIN,       /**< Input pen entered proximity */

    SDL_INPUTPROXIMITYOUT,      /**< Input pen left proximity */

    /* Joystick events */

    SDL_JOYAXISMOTION  = 0x600, /**< Joystick axis motion */

    SDL_JOYBALLMOTION,          /**< Joystick trackball motion */

    SDL_JOYHATMOTION,           /**< Joystick hat position change */

    SDL_JOYBUTTONDOWN,          /**< Joystick button pressed */

    SDL_JOYBUTTONUP,            /**< Joystick button released */

    /* Touch events */

    SDL_FINGERDOWN      = 0x700,

    SDL_FINGERUP,

    SDL_FINGERMOTION,

    SDL_TOUCHBUTTONDOWN,

    SDL_TOUCHBUTTONUP,    

    /* Gesture events */

    SDL_DOLLARGESTURE   = 0x800,

    SDL_DOLLARRECORD,

    SDL_MULTIGESTURE,

    /* Clipboard events */

    SDL_CLIPBOARDUPDATE = 0x900, /**< The clipboard changed */

    /* Drag and drop events */

    SDL_DROPFILE        = 0x1000, /**< The system requests a file open */

    /** Events ::SDL_USEREVENT through ::SDL_LASTEVENT are for your use,

     *  and should be allocated with SDL_RegisterEvents()

     */

    SDL_USEREVENT    = 0x8000,

    /**

     *  This last event is only for bounding internal arrays

     */

    SDL_LASTEVENT    = 0xFFFF

} SDL_EventType;

/**

 *  \brief Window state change event data (event.window.*)

 */

typedef struct SDL_WindowEvent

{

    Uint32 type;        /**< ::SDL_WINDOWEVENT */

    Uint32 timestamp;

    Uint32 windowID;    /**< The associated window */

    Uint8 event;        /**< ::SDL_WindowEventID */

    Uint8 padding1;

    Uint8 padding2;

    Uint8 padding3;

    int data1;          /**< event dependent data */

    int data2;          /**< event dependent data */

} SDL_WindowEvent;

/**

 *  \brief Keyboard button event structure (event.key.*)

 */

typedef struct SDL_KeyboardEvent

{

    Uint32 type;        /**< ::SDL_KEYDOWN or ::SDL_KEYUP */

    Uint32 timestamp;

    Uint32 windowID;    /**< The window with keyboard focus, if any */

    Uint8 state;        /**< ::SDL_PRESSED or ::SDL_RELEASED */

    Uint8 repeat;       /**< Non-zero if this is a key repeat */

    Uint8 padding2;

    Uint8 padding3;

    SDL_Keysym keysym;  /**< The key that was pressed or released */

} SDL_KeyboardEvent;

#define SDL_TEXTEDITINGEVENT_TEXT_SIZE (32)

/**

 *  \brief Keyboard text editing event structure (event.edit.*)

 */

typedef struct SDL_TextEditingEvent

{

    Uint32 type;                                /**< ::SDL_TEXTEDITING */

    Uint32 timestamp;

    Uint32 windowID;                            /**< The window with keyboard focus, if any */

    char text[SDL_TEXTEDITINGEVENT_TEXT_SIZE];  /**< The editing text */

    int start;                                  /**< The start cursor of selected editing text */

    int length;                                 /**< The length of selected editing text */

} SDL_TextEditingEvent;

#define SDL_TEXTINPUTEVENT_TEXT_SIZE (32)

/**

 *  \brief Keyboard text input event structure (event.text.*)

 */

typedef struct SDL_TextInputEvent

{

    Uint32 type;                              /**< ::SDL_TEXTINPUT */

    Uint32 timestamp;

    Uint32 windowID;                          /**< The window with keyboard focus, if any */

    char text[SDL_TEXTINPUTEVENT_TEXT_SIZE];  /**< The input text */

} SDL_TextInputEvent;

/**

 *  \brief Mouse motion event structure (event.motion.*)

 */

typedef struct SDL_MouseMotionEvent

{

    Uint32 type;        /**< ::SDL_MOUSEMOTION */

    Uint32 timestamp;

    Uint32 windowID;    /**< The window with mouse focus, if any */

    Uint8 state;        /**< The current button state */

    Uint8 padding1;

    Uint8 padding2;

    Uint8 padding3;

    int x;              /**< X coordinate, relative to window */

    int y;              /**< Y coordinate, relative to window */

    int xrel;           /**< The relative motion in the X direction */

    int yrel;           /**< The relative motion in the Y direction */

} SDL_MouseMotionEvent;

/**

 *  \brief Mouse button event structure (event.button.*)

 */

typedef struct SDL_MouseButtonEvent

{

    Uint32 type;        /**< ::SDL_MOUSEBUTTONDOWN or ::SDL_MOUSEBUTTONUP */

    Uint32 timestamp;

    Uint32 windowID;    /**< The window with mouse focus, if any */

    Uint8 button;       /**< The mouse button index */

    Uint8 state;        /**< ::SDL_PRESSED or ::SDL_RELEASED */

    Uint8 padding1;

    Uint8 padding2;

    int x;              /**< X coordinate, relative to window */

    int y;              /**< Y coordinate, relative to window */

} SDL_MouseButtonEvent;

/**

 *  \brief Mouse wheel event structure (event.wheel.*)

 */

typedef struct SDL_MouseWheelEvent

{

    Uint32 type;        /**< ::SDL_MOUSEWHEEL */

    Uint32 timestamp;

    Uint32 windowID;    /**< The window with mouse focus, if any */

    int x;              /**< The amount scrolled horizontally */

    int y;              /**< The amount scrolled vertically */

} SDL_MouseWheelEvent;

/**

 *  \brief Joystick axis motion event structure (event.jaxis.*)

 */

typedef struct SDL_JoyAxisEvent

{

    Uint32 type;        /**< ::SDL_JOYAXISMOTION */

    Uint32 timestamp;

    Uint8 which;        /**< The joystick device index */

    Uint8 axis;         /**< The joystick axis index */

    Uint8 padding1;

    Uint8 padding2;

    int value;          /**< The axis value (range: -32768 to 32767) */

} SDL_JoyAxisEvent;

/**

 *  \brief Joystick trackball motion event structure (event.jball.*)

 */

typedef struct SDL_JoyBallEvent

{

    Uint32 type;        /**< ::SDL_JOYBALLMOTION */

    Uint32 timestamp;

    Uint8 which;        /**< The joystick device index */

    Uint8 ball;         /**< The joystick trackball index */

    Uint8 padding1;

    Uint8 padding2;

    int xrel;           /**< The relative motion in the X direction */

    int yrel;           /**< The relative motion in the Y direction */

} SDL_JoyBallEvent;

/**

 *  \brief Joystick hat position change event structure (event.jhat.*)

 */

typedef struct SDL_JoyHatEvent

{

    Uint32 type;        /**< ::SDL_JOYHATMOTION */

    Uint32 timestamp;

    Uint8 which;        /**< The joystick device index */

    Uint8 hat;          /**< The joystick hat index */

    Uint8 value;        /**< The hat position value.

                         *   \sa ::SDL_HAT_LEFTUP ::SDL_HAT_UP ::SDL_HAT_RIGHTUP

                         *   \sa ::SDL_HAT_LEFT ::SDL_HAT_CENTERED ::SDL_HAT_RIGHT

                         *   \sa ::SDL_HAT_LEFTDOWN ::SDL_HAT_DOWN ::SDL_HAT_RIGHTDOWN

                         *   

                         *   Note that zero means the POV is centered.

                         */

    Uint8 padding1;

} SDL_JoyHatEvent;

/**

 *  \brief Joystick button event structure (event.jbutton.*)

 */

typedef struct SDL_JoyButtonEvent

{

    Uint32 type;        /**< ::SDL_JOYBUTTONDOWN or ::SDL_JOYBUTTONUP */

    Uint32 timestamp;

    Uint8 which;        /**< The joystick device index */

    Uint8 button;       /**< The joystick button index */

    Uint8 state;        /**< ::SDL_PRESSED or ::SDL_RELEASED */

    Uint8 padding1;

} SDL_JoyButtonEvent;

/**

 *  \brief Touch finger motion/finger event structure (event.tfinger.*)

 */

typedef struct SDL_TouchFingerEvent

{

    Uint32 type;        /**< ::SDL_FINGERMOTION OR 

			   SDL_FINGERDOWN OR SDL_FINGERUP*/

    Uint32 timestamp;

    Uint32 windowID;    /**< The window with mouse focus, if any */

    SDL_TouchID touchId;        /**< The touch device id */

    SDL_FingerID fingerId;

    Uint8 state;        /**< The current button state */

    Uint8 padding1;

    Uint8 padding2;

    Uint8 padding3;

    Uint16 x;

    Uint16 y;

    Sint16 dx;

    Sint16 dy;

    Uint16 pressure;

} SDL_TouchFingerEvent;

/**

 *  \brief Touch finger motion/finger event structure (event.tbutton.*)

 */

typedef struct SDL_TouchButtonEvent

{

    Uint32 type;        /**< ::SDL_TOUCHBUTTONUP OR SDL_TOUCHBUTTONDOWN */

    Uint32 timestamp;

    Uint32 windowID;    /**< The window with mouse focus, if any */

    SDL_TouchID touchId;        /**< The touch device index */

    Uint8 state;        /**< The current button state */

    Uint8 button;        /**< The button changing state */

    Uint8 padding1;

    Uint8 padding2;

} SDL_TouchButtonEvent;

/**

 *  \brief Multiple Finger Gesture Event (event.mgesture.*)

 */

typedef struct SDL_MultiGestureEvent

{

    Uint32 type;        /**< ::SDL_MULTIGESTURE */

    Uint32 timestamp;

    Uint32 windowID;    /**< The window with mouse focus, if any */

    SDL_TouchID touchId;        /**< The touch device index */

    float dTheta;

    float dDist;

    float y;  

    Uint16 numFingers;

    Uint16 padding;

} SDL_MultiGestureEvent;

/* (event.dgesture.*) */

typedef struct SDL_DollarGestureEvent

{

    Uint32 type;        /**< ::SDL_DOLLARGESTURE */

    Uint32 timestamp;

    Uint32 windowID;    /**< The window with mouse focus, if any */

    SDL_TouchID touchId;        /**< The touch device index */

    SDL_GestureID gestureId;

    Uint32 numFingers;

    float error;

  /*

    //TODO: Enable to give location?

    float x;  //currently 0...1. Change to screen coords?

    float y;  

  */

} SDL_DollarGestureEvent;

/**

 *  \brief An event used to request a file open by the system (event.drop.*)

 *         This event is disabled by default, you can enable it with SDL_EventState()

 *  \note If you enable this event, you must free the filename in the event.

 */

typedef struct SDL_DropEvent

{

    Uint32 type;        /**< ::SDL_DROPFILE */

    Uint32 timestamp;

    char *file;         /**< The file name, which should be freed with SDL_free() */

} SDL_DropEvent;

/**

 *  \brief The "quit requested" event

 */

typedef struct SDL_QuitEvent

{

    Uint32 type;        /**< ::SDL_QUIT */

    Uint32 timestamp;

} SDL_QuitEvent;

/**

 *  \brief A user-defined event type (event.user.*)

 */

typedef struct SDL_UserEvent

{

    Uint32 type;        /**< ::SDL_USEREVENT through ::SDL_NUMEVENTS-1 */

    Uint32 timestamp;

    Uint32 windowID;    /**< The associated window if any */

    int code;           /**< User defined event code */

    void *data1;        /**< User defined data pointer */

    void *data2;        /**< User defined data pointer */

} SDL_UserEvent;

struct SDL_SysWMmsg;

typedef struct SDL_SysWMmsg SDL_SysWMmsg;

/**

 *  \brief A video driver dependent system event (event.syswm.*)

 *         This event is disabled by default, you can enable it with SDL_EventState()

 *

 *  \note If you want to use this event, you should include SDL_syswm.h.

 */

typedef struct SDL_SysWMEvent

{

    Uint32 type;        /**< ::SDL_SYSWMEVENT */

    Uint32 timestamp;

    SDL_SysWMmsg *msg;  /**< driver dependent data, defined in SDL_syswm.h */

} SDL_SysWMEvent;

/**

 *  \brief General event structure

 */

typedef union SDL_Event

{

    Uint32 type;                    /**< Event type, shared with all events */

    SDL_WindowEvent window;         /**< Window event data */

    SDL_KeyboardEvent key;          /**< Keyboard event data */

    SDL_TextEditingEvent edit;      /**< Text editing event data */

    SDL_TextInputEvent text;        /**< Text input event data */

    SDL_MouseMotionEvent motion;    /**< Mouse motion event data */

    SDL_MouseButtonEvent button;    /**< Mouse button event data */

    SDL_MouseWheelEvent wheel;      /**< Mouse wheel event data */

    SDL_JoyAxisEvent jaxis;         /**< Joystick axis event data */

    SDL_JoyBallEvent jball;         /**< Joystick ball event data */

    SDL_JoyHatEvent jhat;           /**< Joystick hat event data */

    SDL_JoyButtonEvent jbutton;     /**< Joystick button event data */

    SDL_QuitEvent quit;             /**< Quit request event data */

    SDL_UserEvent user;             /**< Custom event data */

    SDL_SysWMEvent syswm;           /**< System dependent window event data */

    SDL_TouchFingerEvent tfinger;   /**< Touch finger event data */

    SDL_TouchButtonEvent tbutton;   /**< Touch button event data */

    SDL_MultiGestureEvent mgesture; /**< Multi Finger Gesture data */

    SDL_DollarGestureEvent dgesture; /**< Multi Finger Gesture data */

    SDL_DropEvent drop;             /**< Drag and drop event data */

    /* This is necessary for ABI compatibility between Visual C++ and GCC

       Visual C++ will respect the push pack pragma and use 52 bytes for

       this structure, and GCC will use the alignment of the largest datatype

       within the union, which is 8 bytes.

       So... we'll add padding to force the size to be 56 bytes for both.

    */

    Uint8 padding[56];

} SDL_Event;

/* Function prototypes */

/**

 *  Pumps the event loop, gathering events from the input devices.

 *  

 *  This function updates the event queue and internal input device state.

 *  

 *  This should only be run in the thread that sets the video mode.

 */

extern DECLSPEC void SDLCALL SDL_PumpEvents(void);

/*@{*/

typedef enum

{

    SDL_ADDEVENT,

    SDL_PEEKEVENT,

    SDL_GETEVENT

} SDL_eventaction;

/**

 *  Checks the event queue for messages and optionally returns them.

 *  

 *  If \c action is ::SDL_ADDEVENT, up to \c numevents events will be added to

 *  the back of the event queue.

 *  

 *  If \c action is ::SDL_PEEKEVENT, up to \c numevents events at the front

 *  of the event queue, within the specified minimum and maximum type,

 *  will be returned and will not be removed from the queue.

 *  

 *  If \c action is ::SDL_GETEVENT, up to \c numevents events at the front 

 *  of the event queue, within the specified minimum and maximum type,