lv_indev_gesture.h

lv_indev_set_pinch_up_threshold

Set the threshold for the pinch gesture scale up, when the scale factor of gesture reaches the threshold events get sent

void lv_indev_set_pinch_up_threshold(lv_indev_t *indev, float threshold)

lv_indev_set_pinch_down_threshold

Set the threshold for the pinch gesture scale down, when the scale factor of gesture reaches the threshold events get sent

void lv_indev_set_pinch_down_threshold(lv_indev_t *indev, float threshold)

lv_indev_set_rotation_rad_threshold

Set the rotation threshold in radian for the rotation gesture

void lv_indev_set_rotation_rad_threshold(lv_indev_t *indev, float threshold)

lv_indev_set_gesture_data

Sets the state of the recognizer to a indev data structure, it is usually called from the indev read callback

void lv_indev_set_gesture_data(lv_indev_data_t *data, lv_indev_gesture_recognizer_t *recognizer, lv_indev_gesture_type_t type)

lv_indev_gesture_recognizers_set_data

Set the lv_indev_data_t struct from the recognizer data. To be called in the indev read_cb.

void lv_indev_gesture_recognizers_set_data(lv_indev_t *indev, lv_indev_data_t *data)

lv_event_get_pinch_scale

Obtains the current scale of a pinch gesture

float lv_event_get_pinch_scale(lv_event_t *gesture_event)

Returns: float — the scale of the current gesture

lv_event_get_rotation

Obtains the current angle in radian of a rotation gesture

float lv_event_get_rotation(lv_event_t *gesture_event)

Returns: float — the rotation angle in radian of the current gesture

lv_event_get_two_fingers_swipe_distance

Obtains the current distance in pixels of a two fingers swipe gesture, from the starting center

float lv_event_get_two_fingers_swipe_distance(lv_event_t *gesture_event)

Returns: float — the distance from the center, in pixels, of the current gesture

lv_event_get_two_fingers_swipe_dir

Obtains the current direction from the center of a two finger swipe

lv_dir_t lv_event_get_two_fingers_swipe_dir(lv_event_t *gesture_event)

Returns: lv_dir_t — the rotation angle in radian of the current gesture

lv_indev_get_gesture_center_point

Obtains the center point of a gesture

void lv_indev_get_gesture_center_point(lv_indev_gesture_recognizer_t *recognizer, lv_point_t *point)

lv_event_get_gesture_state

Obtains the current state of the gesture recognizer attached to an event

lv_indev_gesture_state_t lv_event_get_gesture_state(lv_event_t *gesture_event, lv_indev_gesture_type_t type)

Returns: lv_indev_gesture_state_t — current state of the gesture recognizer

lv_event_get_gesture_type

Obtains the current event type of the gesture recognizer attached to an event

lv_indev_gesture_type_t lv_event_get_gesture_type(lv_event_t *gesture_event)

Returns: lv_indev_gesture_type_t — current event type of the gesture recognizer

lv_indev_get_gesture_primary_point

Obtains the coordinates of the current primary point

void lv_indev_get_gesture_primary_point(lv_indev_gesture_recognizer_t *recognizer, lv_point_t *point)

lv_indev_gesture_init

Initialize this indev's recognizers. It specifies their recognizer functions

void lv_indev_gesture_init(lv_indev_t *indev)

lv_indev_gesture_detect_pinch

Pinch gesture recognizer function Will update the recognizer data

void lv_indev_gesture_detect_pinch(lv_indev_gesture_recognizer_t *recognizer, lv_indev_touch_data_t *touches, uint16_t touch_cnt)

lv_indev_gesture_detect_rotation

Rotation gesture recognizer function Will update the recognizer data

void lv_indev_gesture_detect_rotation(lv_indev_gesture_recognizer_t *recognizer, lv_indev_touch_data_t *touches, uint16_t touch_cnt)

lv_indev_gesture_detect_two_fingers_swipe

Two finger swipe gesture recognizer function Will update the recognizer data

void lv_indev_gesture_detect_two_fingers_swipe(lv_indev_gesture_recognizer_t *recognizer, lv_indev_touch_data_t *touches, uint16_t touch_cnt)

lv_indev_recognizer_is_active

Allows to determine if there is an are ongoing gesture

bool lv_indev_recognizer_is_active(lv_indev_gesture_recognizer_t *recognizer)

Returns: bool — false if there are no contact points, or the gesture has ended - true otherwise

lv_indev_gesture_recognizers_update

Update the recognizers. It execute the recognizers functions and checks for LV_GESTURE_STATE_RECOGNIZED or LV_GESTURE_STATE_ENDED gestures. To be called in the indev read_cb.

void lv_indev_gesture_recognizers_update(lv_indev_t *indev, lv_indev_touch_data_t *touches, uint16_t touch_cnt)