SDL_mouse.h

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 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_mouse.h
 *  Include file for SDL mouse event handling
 */

#ifndef _SDL_mouse_h
#define _SDL_mouse_h

#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "SDL_video.h"

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

typedef struct WMcursor WMcursor;	/**< Implementation dependent */
typedef struct SDL_Cursor {
	SDL_Rect area;			/**< The area of the mouse cursor */
	Sint16 hot_x, hot_y;		/**< The "tip" of the cursor */
	Uint8 *data;			/**< B/W cursor data */
	Uint8 *mask;			/**< B/W cursor mask */
	Uint8 *save[2];			/**< Place to save cursor area */
	WMcursor *wm_cursor;		/**< Window-manager cursor */
} SDL_Cursor;

/* Function prototypes */
/**
 * Retrieve the current state of the mouse.
 * The current button state is returned as a button bitmask, which can
 * be tested using the SDL_BUTTON(X) macros, and x and y are set to the
 * current mouse cursor position.  You can pass NULL for either x or y.
 */
extern DECLSPEC Uint8 SDLCALL SDL_GetMouseState(int *x, int *y);

/**
 * Retrieve the current state of the mouse.
 * The current button state is returned as a button bitmask, which can
 * be tested using the SDL_BUTTON(X) macros, and x and y are set to the
 * mouse deltas since the last call to SDL_GetRelativeMouseState().
 */
extern DECLSPEC Uint8 SDLCALL SDL_GetRelativeMouseState(int *x, int *y);

/**
 * Set the position of the mouse cursor (generates a mouse motion event)
 */
extern DECLSPEC void SDLCALL SDL_WarpMouse(Uint16 x, Uint16 y);

/**
 * Create a cursor using the specified data and mask (in MSB format).
 * The cursor width must be a multiple of 8 bits.
 *
 * The cursor is created in black and white according to the following:
 * data  mask    resulting pixel on screen
 *  0     1       White
 *  1     1       Black
 *  0     0       Transparent
 *  1     0       Inverted color if possible, black if not.
 *
 * Cursors created with this function must be freed with SDL_FreeCursor().
 */
extern DECLSPEC SDL_Cursor * SDLCALL SDL_CreateCursor
		(Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y);

/**
 * Set the currently active cursor to the specified one.
 * If the cursor is currently visible, the change will be immediately 
 * represented on the display.
 */
extern DECLSPEC void SDLCALL SDL_SetCursor(SDL_Cursor *cursor);

/**
 * Returns the currently active cursor.
 */
extern DECLSPEC SDL_Cursor * SDLCALL SDL_GetCursor(void);

/**
 * Deallocates a cursor created with SDL_CreateCursor().
 */
extern DECLSPEC void SDLCALL SDL_FreeCursor(SDL_Cursor *cursor);

/**
 * Toggle whether or not the cursor is shown on the screen.
 * The cursor start off displayed, but can be turned off.
 * SDL_ShowCursor() returns 1 if the cursor was being displayed
 * before the call, or 0 if it was not.  You can query the current
 * state by passing a 'toggle' value of -1.
 */
extern DECLSPEC int SDLCALL SDL_ShowCursor(int toggle);

/*@{*/
/** Used as a mask when testing buttons in buttonstate
 *  Button 1:	Left mouse button
 *  Button 2:	Middle mouse button
 *  Button 3:	Right mouse button
 *  Button 4:	Mouse wheel up	 (may also be a real button)
 *  Button 5:	Mouse wheel down (may also be a real button)
 */
#define SDL_BUTTON(X)		(1 << ((X)-1))
#define SDL_BUTTON_LEFT		1
#define SDL_BUTTON_MIDDLE	2
#define SDL_BUTTON_RIGHT	3
#define SDL_BUTTON_WHEELUP	4
#define SDL_BUTTON_WHEELDOWN	5
#define SDL_BUTTON_X1		6
#define SDL_BUTTON_X2		7
#define SDL_BUTTON_LMASK	SDL_BUTTON(SDL_BUTTON_LEFT)
#define SDL_BUTTON_MMASK	SDL_BUTTON(SDL_BUTTON_MIDDLE)
#define SDL_BUTTON_RMASK	SDL_BUTTON(SDL_BUTTON_RIGHT)
#define SDL_BUTTON_X1MASK	SDL_BUTTON(SDL_BUTTON_X1)
#define SDL_BUTTON_X2MASK	SDL_BUTTON(SDL_BUTTON_X2)
/*@}*/

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* _SDL_mouse_h */