ugfx/include/ginput/toggle.h

/*
    ChibiOS/GFX - Copyright (C) 2012, 2013
                 Joel Bodenmann aka Tectu <joel@unormal.org>

    This file is part of ChibiOS/GFX.

    ChibiOS/GFX is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS/GFX 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @file    include/ginput/toggle.h
 * @brief   GINPUT GFX User Input subsystem header file.
 *
 * @defgroup Toggle Toggle
 * @ingroup GINPUT
 *
 * @details	GINPUT allows it to interface toggle buttons easily to your
 *			application.
 *
 * @pre		GFX_USE_GINPUT must be set to TRUE in your gfxconf.h
 * @pre		GINPUT_NEED_TOGGLE must be set to TRUE in your gfxconf.h
 *
 * @{
 */

#ifndef _GINPUT_TOGGLE_H
#define _GINPUT_TOGGLE_H

#if GINPUT_NEED_TOGGLE || defined(__DOXYGEN__)

/*===========================================================================*/
/* Low Level Driver details and error checks.                                */
/*===========================================================================*/

// Get the hardware definitions - Number of instances etc.
#include "ginput_lld_toggle_config.h"

#ifndef GINPUT_TOGGLE_POLL_PERIOD
	#define GINPUT_TOGGLE_POLL_PERIOD 200
#endif

/*===========================================================================*/
/* Type definitions                                                          */
/*===========================================================================*/

// Event types for various ginput sources
#define GEVENT_TOGGLE		(GEVENT_GINPUT_FIRST+3)

typedef struct GEventToggle_t {
	GEventType		type;				// The type of this event (GEVENT_TOGGLE)
	uint16_t		instance;			// The toggle instance
	bool_t			on;					// True if the toggle/button is on
	} GEventToggle;

// Toggle Listen Flags - passed to geventAddSourceToListener()
#define GLISTEN_TOGGLE_ON		0x0001			// Return an event when the toggle turns on
#define GLISTEN_TOGGLE_OFF		0x0002			// Return an event when the toggle turns off

/*===========================================================================*/
/* External declarations.                                                    */
/*===========================================================================*/

#ifdef __cplusplus
extern "C" {
#endif

	/**
	 * @brief	Create a toggle input instance
	 *
	 * @param[in] instance	The ID of the toggle input instance (from 0 to 9999)
	 *
	 * @return	The source handle of the created instance
	 */
	GSourceHandle ginputGetToggle(uint16_t instance);	

	/** 
	 * @brief	Can be used to invert the sense of a toggle
	 *
	 * @param[in] instance	The ID of the toggle input instance
	 * @param[in] invert	If TRUE, will be inverted
	 */
	void ginputInvertToggle(uint16_t instance, bool_t invert);

	/**
	 * @brief	Get the current toggle status
	 *
	 * @param[in] instance	The ID of the toggle input instance
	 * @param[in] ptoggle	The toggle event struct
	 *
	 * @return Returns FALSE on an error (eg invalid instance)
	 */
	bool_t ginputGetToggleStatus(uint16_t instance, GEventToggle *ptoggle);

#ifdef __cplusplus
}
#endif

#endif /* GINPUT_NEED_TOGGLE */

#endif /* _GINPUT_TOGGLE_H */
/** @} */