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+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ * http://ugfx.org/license.html
+ */
+
+/**
+ * @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
+ uint16_t maxvalue; // The maximum 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 */
+/** @} */