lv_draw_label.h

Defines

LV_DRAW_LABEL_NO_TXT_SEL

Typedefs

typedef struct _lv_draw_label_hint_t lv_draw_label_hint_t: Store some info to speed up drawing of very large texts It takes a lot of time to get the first visible character because all the previous characters needs to be checked to calculate the positions. This structure stores an earlier (e.g. at -1000 px) coordinate and the index of that line. Therefore the calculations can start from here.

typedef void (*lv_draw_letter_cb_t)(lv_draw_unit_t *draw_unit, lv_draw_glyph_dsc_t *dsc, lv_draw_fill_dsc_t *fill_dsc, const lv_area_t *fill_area)

Enums

enum lv_draw_letter_bitmap_format_t

Values:

enumerator LV_DRAW_LETTER_BITMAP_FORMAT_A8

enumerator LV_DRAW_LETTER_BITMAP_FORMAT_IMAGE

Functions

void lv_draw_label_iterate_letters(lv_draw_unit_t *draw_unit, const lv_draw_label_dsc_t *dsc, const lv_area_t *coords, lv_draw_letter_cb_t cb)

void lv_draw_label_dsc_init(lv_draw_label_dsc_t *dsc)

void lv_draw_letter_dsc_init(lv_draw_glyph_dsc_t *dsc)

void lv_draw_label(lv_layer_t *layer, const lv_draw_label_dsc_t *dsc, const lv_area_t *coords)

Write a text

Parameters:

draw_ctx -- pointer to the current draw context
dsc -- pointer to draw descriptor
coords -- coordinates of the label
txt -- \0 terminated text to write
hint -- pointer to a lv_draw_label_hint_t variable. It is managed by the draw to speed up the drawing of very long texts (thousands of lines).

void lv_draw_letter(lv_layer_t *layer, lv_draw_label_dsc_t *dsc, const lv_point_t *point, uint32_t unicode_letter)

struct _lv_draw_label_hint_t

#include <lv_draw_label.h>

Store some info to speed up drawing of very large texts It takes a lot of time to get the first visible character because all the previous characters needs to be checked to calculate the positions. This structure stores an earlier (e.g. at -1000 px) coordinate and the index of that line. Therefore the calculations can start from here.

Public Members