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