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ndg/lib/lv_drivers/indev/xkb.h

107 lines
2.9 KiB
C

/**
* @file xkb.h
*
*/
#ifndef XKB_H
#define XKB_H
#ifdef __cplusplus
extern "C" {
#endif
/*********************
* INCLUDES
*********************/
#ifndef LV_DRV_NO_CONF
#ifdef LV_CONF_INCLUDE_SIMPLE
#include "lv_drv_conf.h"
#else
#include "../../lv_drv_conf.h"
#endif
#endif
#if USE_XKB
#ifdef LV_LVGL_H_INCLUDE_SIMPLE
#include "lvgl.h"
#else
#include "lvgl/lvgl.h"
#endif
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
struct xkb_rule_names;
typedef struct {
struct xkb_keymap *keymap;
struct xkb_state *state;
} xkb_drv_state_t;
/**********************
* GLOBAL PROTOTYPES
**********************/
/**
* Initialise the XKB system using the default driver state. Use this function if you only want
* to connect a single device.
* @return true if the initialisation was successful
*/
bool xkb_init(void);
/**
* Initialise the XKB system using a specific driver state. Use this function if you want to
* connect multiple devices.
* @param state XKB driver state to use
* @return true if the initialisation was successful
*/
bool xkb_init_state(xkb_drv_state_t *state);
/**
* Set a new keymap to be used for processing future key events using the default driver state. Use
* this function if you only want to connect a single device.
* @param names XKB rule names structure (use NULL components for default values)
* @return true if creating the keymap and associated state succeeded
*/
bool xkb_set_keymap(struct xkb_rule_names names);
/**
* Set a new keymap to be used for processing future key events using a specific driver state. Use
* this function if you want to connect multiple devices.
* @param state XKB driver state to use
* @param names XKB rule names structure (use NULL components for default values)
* @return true if creating the keymap and associated state succeeded
*/
bool xkb_set_keymap_state(xkb_drv_state_t *state, struct xkb_rule_names names);
/**
* Process an evdev scancode using the default driver state. Use this function if you only want to
* connect a single device.
* @param scancode evdev scancode to process
* @param down true if the key was pressed, false if it was releases
* @return the (first) UTF-8 character produced by the event or 0 if no output was produced
*/
uint32_t xkb_process_key(uint32_t scancode, bool down);
/**
* Process an evdev scancode using a specific driver state. Use this function if you want to connect
* multiple devices.
* @param state XKB driver state to use
* @param scancode evdev scancode to process
* @param down true if the key was pressed, false if it was releases
* @return the (first) UTF-8 character produced by the event or 0 if no output was produced
*/
uint32_t xkb_process_key_state(xkb_drv_state_t *state, uint32_t scancode, bool down);
/**********************
* MACROS
**********************/
#endif /* USE_XKB */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* XKB_H */