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SourceVuESP-IDF Framework and Examplesi2c_oled sample_lv_obj_scroll_by_raw()

_lv_obj_scroll_by_raw() function

Low level function to scroll by given x and y coordinates. `LV_EVENT_SCROLL` is sent.

Syntax

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Summary

Declaration

Definition

from lv_obj_scroll.h:262

lv_res_t _lv_obj_scroll_by_raw(struct _lv_obj_t * obj, lv_coord_t x, lv_coord_t y);

Implemented in lv_obj_scroll.c:412

Arguments

Argument

Description

obj

pointer to an object to scroll

pixels to scroll horizontally

pixels to scroll vertically

Return value

`LV_RES_INV`: to object was deleted in `LV_EVENT_SCROLL`; `LV_RES_OK`: if the object is still valid

References

Code

Location

Referrer

lv_res_t _lv_obj_scroll_by_raw(lv_obj_t * obj, lv_coord_t x, lv_coord_t y)

lv_obj_scroll.c:412

lv_res_t _lv_obj_scroll_by_raw(struct _lv_obj_t * obj, lv_coord_t x, lv_coord_t y);

lv_obj_scroll.h:262

_lv_obj_scroll_by_raw(scroll_obj, diff_x, diff_y);

lv_indev_scroll.c:88

_lv_indev_scroll_handler()

res = _lv_obj_scroll_by_raw(obj, dx, dy);

lv_obj_scroll.c:354

lv_obj_scroll_by()

_lv_obj_scroll_by_raw(obj, v + lv_obj_get_scroll_x(obj), 0);

lv_obj_scroll.c:674

scroll_x_anim()

_lv_obj_scroll_by_raw(obj, 0, v + lv_obj_get_scroll_y(obj));

lv_obj_scroll.c:679

scroll_y_anim()

Call Tree

_lv_obj_scroll_by_raw() is called by 4 functions and calls 4 functions:

lv_obj_scroll_by()

scroll_x_anim()

scroll_y_anim()

_lv_indev_scroll_handler()

_lv_obj_scroll_by_raw()

lv_obj_move_children_by()

lv_obj_invalidate()

lv_event_send()

lv_obj_allocate_spec_attr()

Data Use

_lv_obj_scroll_by_raw() reads 6 variables and writes 2 variables:

lv_event_code_t::LV_EVENT_SCROLL

_lv_obj_spec_attr_t::scroll

_lv_obj_scroll_by_raw()

lv_point_t::x

lv_point_t::y

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Lifecycle

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