124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/*
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ChibiOS/GFX - Copyright (C) 2012
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/GFX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file include/ginput/dial.h
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* @brief GINPUT GFX User Input subsystem header file.
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*
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* @defgroup Dial Dial
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* @ingroup GINPUT
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*
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* @details A dial provides a powerful way to navigate through menus
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* on a display.
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*
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* @pre GFX_USE_GINPUT must be set to TRUE in your gfxconf.h
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* @pre GINPUT_NEED_DIAL must be set to TRUE in your gfxconf.h
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*
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* @{
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*/
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#ifndef _GINPUT_DIAL_H
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#define _GINPUT_DIAL_H
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#if GINPUT_NEED_DIAL || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Type definitions */
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/*===========================================================================*/
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// Event types for various ginput sources
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#define GEVENT_DIAL (GEVENT_GINPUT_FIRST+4)
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typedef struct GEventDial_t {
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GEventType type; // The type of this event (GEVENT_DIAL)
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uint16_t instance; // The dial instance
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uint16_t value; // The dial value
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} GEventDial;
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Create a dial input instance
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*
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* @param[in] instance The ID of the dial input instance (from 0 to 9999)
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*
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* @return The soure handle of the created dial instance
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*/
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GSourceHandle ginputGetDial(uint16_t instance);
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/**
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* @brief Reset the value back to the hardware default
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*
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* @param[in] instance The ID of the dial input instance
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*/
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void ginputResetDialRange(uint16_t instance);
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/**
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* @brief Get the maximum value
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* @details The readings are scaled to be 0 ... max-1.
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* 0 means over the full uint16_t range.
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*
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* @param[in] instance The ID of the dial input instance
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*
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* @return The maximum value
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*/
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uint16_t ginputGetDialRange(uint16_t instance);
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/**
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* @brief Set the maximum value
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* @note This shouldn't be set higher that the hardwares possible maximum value
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*
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* @param[in] instance The ID of the dial input instance
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* @param[in] max The maximum value to be set
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*/
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void ginputSetDialRange(uint16_t instance, uint16_t max);
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/**
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* @brief Set the level change required before a dial even is generated (threshold)
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* @note This is done after range scaling
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*
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* @param[in] instance The ID of the dial input instance
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* @param[in] diff The amount of level changes
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*/
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void ginputSetDialSensitivity(uint16_t instance, uint16_t diff);
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/**
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* @brief Get the current dial status
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*
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* @param[in] instance The ID of the dial input instance
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* @param[in] pdial The dial event struct
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*
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* @return Returns FALSE on an error (eg invalid instance)
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*/
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bool_t ginputGetDialStatus(uint16_t instance, GEventDial *pdial);
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#ifdef __cplusplus
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}
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#endif
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#endif /* GINPUT_NEED_DIAL */
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#endif /* _GINPUT_DIAL_H */
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/** @} */
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