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ndg/lib/lv_drivers/indev/libinput_drv.h

146 lines
4.4 KiB
C

/**
* @file libinput.h
*
*/
#ifndef LVGL_LIBINPUT_H
#define LVGL_LIBINPUT_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_LIBINPUT || USE_BSD_LIBINPUT
#ifdef LV_LVGL_H_INCLUDE_SIMPLE
#include "lvgl.h"
#else
#include "lvgl/lvgl.h"
#endif
#include <poll.h>
#if USE_XKB
#include "xkb.h"
#endif /* USE_XKB */
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
typedef enum {
LIBINPUT_CAPABILITY_NONE = 0,
LIBINPUT_CAPABILITY_KEYBOARD = 1U << 0,
LIBINPUT_CAPABILITY_POINTER = 1U << 1,
LIBINPUT_CAPABILITY_TOUCH = 1U << 2
} libinput_capability;
typedef struct {
int fd;
struct pollfd fds[1];
int button;
int key_val;
lv_point_t most_recent_touch_point;
struct libinput *libinput_context;
struct libinput_device *libinput_device;
#if USE_XKB
xkb_drv_state_t xkb_state;
#endif /* USE_XKB */
} libinput_drv_state_t;
/**********************
* GLOBAL PROTOTYPES
**********************/
/**
* find connected input device with specific capabilities
* @param capabilities required device capabilities
* @param force_rescan erase the device cache (if any) and rescan the file system for available devices
* @return device node path (e.g. /dev/input/event0) for the first matching device or NULL if no device was found.
* The pointer is safe to use until the next forceful device search.
*/
char *libinput_find_dev(libinput_capability capabilities, bool force_rescan);
/**
* find connected input devices with specific capabilities
* @param capabilities required device capabilities
* @param devices pre-allocated array to store the found device node paths (e.g. /dev/input/event0). The pointers are
* safe to use until the next forceful device search.
* @param count maximum number of devices to find (the devices array should be at least this long)
* @param force_rescan erase the device cache (if any) and rescan the file system for available devices
* @return number of devices that were found
*/
size_t libinput_find_devs(libinput_capability capabilities, char **found, size_t count, bool force_rescan);
/**
* Prepare for reading input via libinput using the default driver state. Use this function if you only want
* to connect a single device.
*/
void libinput_init(void);
/**
* Prepare for reading input via libinput using a specific driver state. Use this function if you want to
* connect multiple devices.
* @param state driver state to initialize
* @param path input device node path (e.g. /dev/input/event0)
*/
void libinput_init_state(libinput_drv_state_t *state, char* path);
/**
* Reconfigure the device file for libinput using the default driver state. Use this function if you only want
* to connect a single device.
* @param dev_name input device node path (e.g. /dev/input/event0)
* @return true: the device file set complete
* false: the device file doesn't exist current system
*/
bool libinput_set_file(char* dev_name);
/**
* Reconfigure the device file for libinput using a specific driver state. Use this function if you want to
* connect multiple devices.
* @param state the driver state to configure
* @param dev_name input device node path (e.g. /dev/input/event0)
* @return true: the device file set complete
* false: the device file doesn't exist current system
*/
bool libinput_set_file_state(libinput_drv_state_t *state, char* dev_name);
/**
* Read available input events via libinput using the default driver state. Use this function if you only want
* to connect a single device.
* @param indev_drv driver object itself
* @param data store the libinput data here
*/
void libinput_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
/**
* Read available input events via libinput using a specific driver state. Use this function if you want to
* connect multiple devices.
* @param state the driver state to use
* @param indev_drv driver object itself
* @param data store the libinput data here
*/
void libinput_read_state(libinput_drv_state_t * state, lv_indev_drv_t * indev_drv, lv_indev_data_t * data);
/**********************
* MACROS
**********************/
#endif /* USE_LIBINPUT || USE_BSD_LIBINPUT */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* LVGL_LIBINPUT_H */