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/*
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/dial.h
* @brief GINPUT GFX User Input subsystem header file.
*
* @defgroup Dial Dial
* @ingroup GINPUT
*
* @details A dial provides a powerful way to navigate through menus
* on a display.
*
* @pre GFX_USE_GINPUT must be set to TRUE in your gfxconf.h
* @pre GINPUT_NEED_DIAL must be set to TRUE in your gfxconf.h
*
* @{
*/
#ifndef _GINPUT_DIAL_H
#define _GINPUT_DIAL_H
#if GINPUT_NEED_DIAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Type definitions */
/*===========================================================================*/
// Event types for various ginput sources
#define GEVENT_DIAL (GEVENT_GINPUT_FIRST+4)
typedef struct GEventDial_t {
GEventType type; // The type of this event (GEVENT_DIAL)
uint16_t instance; // The dial instance
uint16_t value; // The dial value
} GEventDial;
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create a dial input instance
*
* @param[in] instance The ID of the dial input instance (from 0 to 9999)
*
* @return The soure handle of the created dial instance
*/
GSourceHandle ginputGetDial(uint16_t instance);
/**
* @brief Reset the value back to the hardware default
*
* @param[in] instance The ID of the dial input instance
*/
void ginputResetDialRange(uint16_t instance);
/**
* @brief Get the maximum value
* @details The readings are scaled to be 0 ... max.
*
* @param[in] instance The ID of the dial input instance
*
* @return The maximum value
*/
uint16_t ginputGetDialRange(uint16_t instance);
/**
* @brief Set the maximum value
* @details The readings are scaled to be 0 ... max.
*
* @param[in] instance The ID of the dial input instance
* @param[in] max The maximum value to be set
*/
void ginputSetDialRange(uint16_t instance, uint16_t max);
/**
* @brief Set the level change required before a dial even is generated (threshold)
* @note This is done after range scaling
*
* @param[in] instance The ID of the dial input instance
* @param[in] diff The amount of level changes
*/
void ginputSetDialSensitivity(uint16_t instance, uint16_t diff);
/**
* @brief Get the current dial status
*
* @param[in] instance The ID of the dial input instance
* @param[in] pdial The dial event struct
*
* @return Returns FALSE on an error (eg invalid instance)
*/
bool_t ginputGetDialStatus(uint16_t instance, GEventDial *pdial);
#ifdef __cplusplus
}
#endif
#endif /* GINPUT_NEED_DIAL */
#endif /* _GINPUT_DIAL_H */
/** @} */
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