/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2012 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga

    slouken@libsdl.org

*/

/**

 *  @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_active.h"

#include "SDL_keyboard.h"

#include "SDL_mouse.h"

#include "SDL_joystick.h"

#include "SDL_quit.h"

#include "begin_code.h"

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

#ifdef __cplusplus

extern "C" {

#endif

/** @name General keyboard/mouse state definitions */

/*@{*/

#define SDL_RELEASED	0

#define SDL_PRESSED	1

/*@}*/

/** Event enumerations */

typedef enum {

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

       SDL_ACTIVEEVENT,			/**< Application loses/gains visibility */

       SDL_KEYDOWN,			/**< Keys pressed */

       SDL_KEYUP,			/**< Keys released */

       SDL_MOUSEMOTION,			/**< Mouse moved */

       SDL_MOUSEBUTTONDOWN,		/**< Mouse button pressed */

       SDL_MOUSEBUTTONUP,		/**< Mouse button released */

       SDL_JOYAXISMOTION,		/**< Joystick axis motion */

       SDL_JOYBALLMOTION,		/**< Joystick trackball motion */

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

       SDL_JOYBUTTONDOWN,		/**< Joystick button pressed */

       SDL_JOYBUTTONUP,			/**< Joystick button released */

       SDL_QUIT,			/**< User-requested quit */

       SDL_SYSWMEVENT,			/**< System specific event */

       SDL_EVENT_RESERVEDA,		/**< Reserved for future use.. */

       SDL_EVENT_RESERVEDB,		/**< Reserved for future use.. */

       SDL_VIDEORESIZE,			/**< User resized video mode */

       SDL_VIDEOEXPOSE,			/**< Screen needs to be redrawn */

       SDL_EVENT_RESERVED2,		/**< Reserved for future use.. */

       SDL_EVENT_RESERVED3,		/**< Reserved for future use.. */

       SDL_EVENT_RESERVED4,		/**< Reserved for future use.. */

       SDL_EVENT_RESERVED5,		/**< Reserved for future use.. */

       SDL_EVENT_RESERVED6,		/**< Reserved for future use.. */

       SDL_EVENT_RESERVED7,		/**< Reserved for future use.. */

       /** Events SDL_USEREVENT through SDL_MAXEVENTS-1 are for your use */

       SDL_USEREVENT = 24,

       /** This last event is only for bounding internal arrays

	*  It is the number of bits in the event mask datatype -- Uint32

        */

       SDL_NUMEVENTS = 32

} SDL_EventType;

/** @name Predefined event masks */

/*@{*/

#define SDL_EVENTMASK(X)	(1<<(X))

typedef enum {

	SDL_ACTIVEEVENTMASK	= SDL_EVENTMASK(SDL_ACTIVEEVENT),

	SDL_KEYDOWNMASK		= SDL_EVENTMASK(SDL_KEYDOWN),

	SDL_KEYUPMASK		= SDL_EVENTMASK(SDL_KEYUP),

	SDL_KEYEVENTMASK	= SDL_EVENTMASK(SDL_KEYDOWN)|

	                          SDL_EVENTMASK(SDL_KEYUP),

	SDL_MOUSEMOTIONMASK	= SDL_EVENTMASK(SDL_MOUSEMOTION),

	SDL_MOUSEBUTTONDOWNMASK	= SDL_EVENTMASK(SDL_MOUSEBUTTONDOWN),

	SDL_MOUSEBUTTONUPMASK	= SDL_EVENTMASK(SDL_MOUSEBUTTONUP),

	SDL_MOUSEEVENTMASK	= SDL_EVENTMASK(SDL_MOUSEMOTION)|

	                          SDL_EVENTMASK(SDL_MOUSEBUTTONDOWN)|

	                          SDL_EVENTMASK(SDL_MOUSEBUTTONUP),

	SDL_JOYAXISMOTIONMASK	= SDL_EVENTMASK(SDL_JOYAXISMOTION),

	SDL_JOYBALLMOTIONMASK	= SDL_EVENTMASK(SDL_JOYBALLMOTION),

	SDL_JOYHATMOTIONMASK	= SDL_EVENTMASK(SDL_JOYHATMOTION),

	SDL_JOYBUTTONDOWNMASK	= SDL_EVENTMASK(SDL_JOYBUTTONDOWN),

	SDL_JOYBUTTONUPMASK	= SDL_EVENTMASK(SDL_JOYBUTTONUP),

	SDL_JOYEVENTMASK	= SDL_EVENTMASK(SDL_JOYAXISMOTION)|

	                          SDL_EVENTMASK(SDL_JOYBALLMOTION)|

	                          SDL_EVENTMASK(SDL_JOYHATMOTION)|

	                          SDL_EVENTMASK(SDL_JOYBUTTONDOWN)|

	                          SDL_EVENTMASK(SDL_JOYBUTTONUP),

	SDL_VIDEORESIZEMASK	= SDL_EVENTMASK(SDL_VIDEORESIZE),

	SDL_VIDEOEXPOSEMASK	= SDL_EVENTMASK(SDL_VIDEOEXPOSE),

	SDL_QUITMASK		= SDL_EVENTMASK(SDL_QUIT),

	SDL_SYSWMEVENTMASK	= SDL_EVENTMASK(SDL_SYSWMEVENT)

} SDL_EventMask ;

#define SDL_ALLEVENTS		0xFFFFFFFF

/*@}*/

/** Application visibility event structure */

typedef struct SDL_ActiveEvent {

	Uint8 type;	/**< SDL_ACTIVEEVENT */

	Uint8 gain;	/**< Whether given states were gained or lost (1/0) */

	Uint8 state;	/**< A mask of the focus states */

} SDL_ActiveEvent;

/** Keyboard event structure */

typedef struct SDL_KeyboardEvent {

	Uint8 type;	/**< SDL_KEYDOWN or SDL_KEYUP */

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

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

	SDL_keysym keysym;

} SDL_KeyboardEvent;

/** Mouse motion event structure */

typedef struct SDL_MouseMotionEvent {

	Uint8 type;	/**< SDL_MOUSEMOTION */

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

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

	Uint16 x, y;	/**< The X/Y coordinates of the mouse */

	Sint16 xrel;	/**< The relative motion in the X direction */

	Sint16 yrel;	/**< The relative motion in the Y direction */

} SDL_MouseMotionEvent;

/** Mouse button event structure */

typedef struct SDL_MouseButtonEvent {

	Uint8 type;	/**< SDL_MOUSEBUTTONDOWN or SDL_MOUSEBUTTONUP */

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

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

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

	Uint16 x, y;	/**< The X/Y coordinates of the mouse at press time */

} SDL_MouseButtonEvent;

/** Joystick axis motion event structure */

typedef struct SDL_JoyAxisEvent {

	Uint8 type;	/**< SDL_JOYAXISMOTION */

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

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

	Sint16 value;	/**< The axis value (range: -32768 to 32767) */

} SDL_JoyAxisEvent;

/** Joystick trackball motion event structure */

typedef struct SDL_JoyBallEvent {

	Uint8 type;	/**< SDL_JOYBALLMOTION */

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

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

	Sint16 xrel;	/**< The relative motion in the X direction */

	Sint16 yrel;	/**< The relative motion in the Y direction */

} SDL_JoyBallEvent;

/** Joystick hat position change event structure */

typedef struct SDL_JoyHatEvent {

	Uint8 type;	/**< SDL_JOYHATMOTION */

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

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

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

			 *   SDL_HAT_LEFTUP   SDL_HAT_UP       SDL_HAT_RIGHTUP

			 *   SDL_HAT_LEFT     SDL_HAT_CENTERED SDL_HAT_RIGHT

			 *   SDL_HAT_LEFTDOWN SDL_HAT_DOWN     SDL_HAT_RIGHTDOWN

			 *  Note that zero means the POV is centered.

			 */

} SDL_JoyHatEvent;

/** Joystick button event structure */

typedef struct SDL_JoyButtonEvent {

	Uint8 type;	/**< SDL_JOYBUTTONDOWN or SDL_JOYBUTTONUP */

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

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

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

} SDL_JoyButtonEvent;

/** The "window resized" event

 *  When you get this event, you are responsible for setting a new video

 *  mode with the new width and height.

 */

typedef struct SDL_ResizeEvent {

	Uint8 type;	/**< SDL_VIDEORESIZE */

	int w;		/**< New width */

	int h;		/**< New height */

} SDL_ResizeEvent;

/** The "screen redraw" event */

typedef struct SDL_ExposeEvent {

	Uint8 type;	/**< SDL_VIDEOEXPOSE */

} SDL_ExposeEvent;

/** The "quit requested" event */

typedef struct SDL_QuitEvent {

	Uint8 type;	/**< SDL_QUIT */

} SDL_QuitEvent;

/** A user-defined event type */

typedef struct SDL_UserEvent {

	Uint8 type;	/**< SDL_USEREVENT through SDL_NUMEVENTS-1 */

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

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

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

} SDL_UserEvent;

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

struct SDL_SysWMmsg;

typedef struct SDL_SysWMmsg SDL_SysWMmsg;

typedef struct SDL_SysWMEvent {

	Uint8 type;

	SDL_SysWMmsg *msg;

} SDL_SysWMEvent;

/** General event structure */

typedef union SDL_Event {

	Uint8 type;

	SDL_ActiveEvent active;

	SDL_KeyboardEvent key;

	SDL_MouseMotionEvent motion;

	SDL_MouseButtonEvent button;

	SDL_JoyAxisEvent jaxis;

	SDL_JoyBallEvent jball;

	SDL_JoyHatEvent jhat;

	SDL_JoyButtonEvent jbutton;

	SDL_ResizeEvent resize;

	SDL_ExposeEvent expose;

	SDL_QuitEvent quit;

	SDL_UserEvent user;

	SDL_SysWMEvent syswm;

} 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 'action' is SDL_ADDEVENT, up to 'numevents' events will be added to

 *  the back of the event queue.

 *  If 'action' is SDL_PEEKEVENT, up to 'numevents' events at the front

 *  of the event queue, matching 'mask', will be returned and will not

 *  be removed from the queue.

 *  If 'action' is SDL_GETEVENT, up to 'numevents' events at the front 

 *  of the event queue, matching 'mask', will be returned and will be

 *  removed from the queue.

 *

 *  @return

 *  This function returns the number of events actually stored, or -1

 *  if there was an error.

 *

 *  This function is thread-safe.

 */

extern DECLSPEC int SDLCALL SDL_PeepEvents(SDL_Event *events, int numevents,

				SDL_eventaction action, Uint32 mask);

/** Polls for currently pending events, and returns 1 if there are any pending

 *  events, or 0 if there are none available.  If 'event' is not NULL, the next

 *  event is removed from the queue and stored in that area.

 */

extern DECLSPEC int SDLCALL SDL_PollEvent(SDL_Event *event);

/** Waits indefinitely for the next available event, returning 1, or 0 if there

 *  was an error while waiting for events.  If 'event' is not NULL, the next

 *  event is removed from the queue and stored in that area.

 */

extern DECLSPEC int SDLCALL SDL_WaitEvent(SDL_Event *event);

/** Add an event to the event queue.

 *  This function returns 0 on success, or -1 if the event queue was full

 *  or there was some other error.

 */

extern DECLSPEC int SDLCALL SDL_PushEvent(SDL_Event *event);

/** @name Event Filtering */

/*@{*/

typedef int (SDLCALL *SDL_EventFilter)(const SDL_Event *event);

/**

 *  This function sets up a filter to process all events before they

 *  change internal state and are posted to the internal event queue.

 *

 *  The filter is protypted as:

 *      @code typedef int (SDLCALL *SDL_EventFilter)(const SDL_Event *event); @endcode

 *

 * If the filter returns 1, then the event will be added to the internal queue.

 * If it returns 0, then the event will be dropped from the queue, but the 

 * internal state will still be updated.  This allows selective filtering of

 * dynamically arriving events.

 *

 * @warning  Be very careful of what you do in the event filter function, as 

 *           it may run in a different thread!

 *

 * There is one caveat when dealing with the SDL_QUITEVENT event type.  The

 * event filter is only called when the window manager desires to close the

 * application window.  If the event filter returns 1, then the window will

 * be closed, otherwise the window will remain open if possible.

 * If the quit event is generated by an interrupt signal, it will bypass the

 * internal queue and be delivered to the application at the next event poll.

 */

extern DECLSPEC void SDLCALL SDL_SetEventFilter(SDL_EventFilter filter);

/**

 *  Return the current event filter - can be used to "chain" filters.

 *  If there is no event filter set, this function returns NULL.

 */

extern DECLSPEC SDL_EventFilter SDLCALL SDL_GetEventFilter(void);

/*@}*/

/** @name Event State */

/*@{*/

#define SDL_QUERY	-1

#define SDL_IGNORE	 0

#define SDL_DISABLE	 0

#define SDL_ENABLE	 1

/*@}*/

/**

* This function allows you to set the state of processing certain events.

* If 'state' is set to SDL_IGNORE, that event will be automatically dropped

* from the event queue and will not event be filtered.

* If 'state' is set to SDL_ENABLE, that event will be processed normally.

* If 'state' is set to SDL_QUERY, SDL_EventState() will return the 

* current processing state of the specified event.

*/

extern DECLSPEC Uint8 SDLCALL SDL_EventState(Uint8 type, int state);

/* Ends C function definitions when using C++ */

#ifdef __cplusplus

}

#endif

#include "close_code.h"

#endif /* _SDL_events_h */