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lvgl/lv_objx/lv_label.c
Gabor Kiss-Vamosi 36f236bc44 lv_label: roll long mode bugfix on size change
2017-11-07 14:30:52 +01:00

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/**
* @file lv_rect.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_conf.h"
#if USE_LV_LABEL != 0
#include "misc/gfx/color.h"
#include "misc/gfx/text.h"
#include "misc/math/math_base.h"
#include "lv_label.h"
#include "../lv_obj/lv_obj.h"
#include "../lv_obj/lv_group.h"
#include "misc/gfx/text.h"
#include "misc/gfx/anim.h"
#include "../lv_draw/lv_draw.h"
/*********************
* DEFINES
*********************/
/*Test configurations*/
#ifndef LV_LABEL_SCROLL_SPEED
#define LV_LABEL_SCROLL_SPEED (25 << LV_ANTIALIAS) /*Hor, or ver. scroll speed (px/sec) in 'LV_LABEL_LONG_SCROLL' mode*/
#endif
#ifndef LV_LABEL_SCROLL_SPEED_VER
#define LV_LABEL_SCROLL_SPEED_VER (10 << LV_ANTIALIAS) /*Ver. scroll speed if hor. scroll is applied too*/
#endif
#ifndef LV_LABEL_SCROLL_PLAYBACK_PAUSE
#define LV_LABEL_SCROLL_PLAYBACK_PAUSE 500 /*Wait before the scroll turns back in ms*/
#endif
#ifndef LV_LABEL_SCROLL_REPEAT_PAUSE
#define LV_LABEL_SCROLL_REPEAT_PAUSE 500 /*Wait before the scroll begins again in ms*/
#endif
#define LV_LABEL_DOT_NUM 3
#define LV_LABEL_DOT_END_INV 0xFFFF
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_label_design(lv_obj_t * label, const area_t * mask, lv_design_mode_t mode);
static void lv_label_refr_text(lv_obj_t * label);
static void lv_label_set_offset_x(lv_obj_t * label, cord_t x);
static void lv_label_set_offset_y(lv_obj_t * label, cord_t y);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a label objects
* @param par pointer to an object, it will be the parent of the new label
* @param copy pointer to a button object, if not NULL then the new object will be copied from it
* @return pointer to the created button
*/
lv_obj_t * lv_label_create(lv_obj_t * par, lv_obj_t * copy)
{
/*Create a basic object*/
lv_obj_t * new_label = lv_obj_create(par, copy);
dm_assert(new_label);
/*Extend the basic object to a label object*/
lv_obj_allocate_ext_attr(new_label, sizeof(lv_label_ext_t));
lv_label_ext_t * ext = lv_obj_get_ext_attr(new_label);
dm_assert(ext);
ext->txt = NULL;
ext->static_txt = 0;
ext->recolor = 0;
ext->no_break = 0;
ext->body_draw = 0;
ext->align = LV_LABEL_ALIGN_LEFT;
ext->dot_end = LV_LABEL_DOT_END_INV;
ext->long_mode = LV_LABEL_LONG_EXPAND;
ext->offset.x = 0;
ext->offset.y = 0;
lv_obj_set_design_func(new_label, lv_label_design);
lv_obj_set_signal_func(new_label, lv_label_signal);
/*Init the new label*/
if(copy == NULL) {
lv_obj_set_click(new_label, false);
lv_obj_set_style(new_label, NULL);
lv_label_set_long_mode(new_label, LV_LABEL_LONG_EXPAND);
lv_label_set_text(new_label, "Text");
}
/*Copy 'copy' if not NULL*/
else {
lv_label_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
lv_label_set_long_mode(new_label, lv_label_get_long_mode(copy));
lv_label_set_recolor(new_label, lv_label_get_recolor(copy));
lv_label_set_body_draw(new_label, lv_label_get_body_draw(copy));
lv_label_set_align(new_label, lv_label_get_align(copy));
if(copy_ext->static_txt == 0) lv_label_set_text(new_label, lv_label_get_text(copy));
else lv_label_set_text_static(new_label, lv_label_get_text(copy));
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_label);
}
return new_label;
}
/**
* Signal function of the label
* @param label pointer to a label object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
*/
bool lv_label_signal(lv_obj_t * label, lv_signal_t sign, void * param)
{
bool valid;
/* Include the ancient signal function */
valid = lv_obj_signal(label, sign, param);
/* The object can be deleted so check its validity and then
* make the object specific signal handling */
if(valid != false) {
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(sign == LV_SIGNAL_CLEANUP) {
if(ext->static_txt == 0) {
dm_free(ext->txt);
ext->txt = NULL;
}
}
else if(sign == LV_SIGNAL_STYLE_CHG) {
lv_label_refr_text(label);
}
else if (sign == LV_SIGNAL_CORD_CHG) {
if(area_get_width(&label->coords) != area_get_width(param) ||
area_get_height(&label->coords) != area_get_height(param))
{
lv_label_refr_text(label);
}
}
}
return valid;
}
/*=====================
* Setter functions
*====================*/
/**
* Set a new text for a label. Memory will be allocated to store the text by the label.
* @param label pointer to a label object
* @param text '\0' terminated character string. NULL to refresh with the current text.
*/
void lv_label_set_text(lv_obj_t * label, const char * text)
{
lv_obj_invalidate(label);
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
/*If text is NULL then refresh */
if(text == NULL) {
lv_label_refr_text(label);
return;
}
if(ext->txt == text) {
/*If set its own text then reallocate it (maybe its size changed)*/
ext->txt = dm_realloc(ext->txt, strlen(ext->txt) + 1);
} else {
/*Allocate space for the new text*/
uint32_t len = strlen(text) + 1;
if(ext->txt != NULL && ext->static_txt == 0) {
dm_free(ext->txt);
ext->txt = NULL;
}
ext->txt = dm_alloc(len);
strcpy(ext->txt, text);
ext->static_txt = 0; /*Now the text is dynamically allocated*/
}
lv_label_refr_text(label);
}
/**
* Set a new text for a label from a character array. The array don't has to be '\0' terminated.
* Memory will be allocated to store the array by the label.
* @param label pointer to a label object
* @param array array of characters or NULL to refresh the label
* @param size the size of 'array' in bytes
*/
void lv_label_set_text_array(lv_obj_t * label, const char * array, uint16_t size)
{
lv_obj_invalidate(label);
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
/*If trying to set its own text or the array is NULL then refresh */
if(array == ext->txt || array == NULL) {
lv_label_refr_text(label);
return;
}
/*Allocate space for the new text*/
if(ext->txt != NULL && ext->static_txt == 0) {
dm_free(ext->txt);
ext->txt = NULL;
}
ext->txt = dm_alloc(size + 1);
memcpy(ext->txt, array, size);
ext->txt[size] = '\0';
ext->static_txt = 0; /*Now the text is dynamically allocated*/
lv_label_refr_text(label);
}
/**
* Set a static text. It will not be saved by the label so the 'text' variable
* has to be 'alive' while the label exist.
* @param label pointer to a label object
* @param text pointer to a text. NULL to refresh with the current text.
*/
void lv_label_set_text_static(lv_obj_t * label, const char * text)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(ext->static_txt == 0 && ext->txt != NULL) {
dm_free(ext->txt);
ext->txt = NULL;
}
if(text != NULL) {
ext->static_txt = 1;
ext->txt = (char *) text;
}
lv_label_refr_text(label);
}
/**
* Insert a text to the label. The label current label text can not be static.
* @param label pointer to label object
* @param pos character index to insert Expressed in character index and not byte index (Different in UTF-8)
* 0: before first char.
* LV_LABEL_POS_LAST: after last char.
* @param txt pointer to the text to insert
*/
void lv_label_ins_text(lv_obj_t * label, uint32_t pos, const char * txt)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
/*Can not append to static text*/
if(ext->static_txt != 0) return;
lv_obj_invalidate(label);
/*Allocate space for the new text*/
uint32_t old_len = strlen(ext->txt);
uint32_t ins_len = strlen(txt);
uint32_t new_len = ins_len + old_len;
ext->txt = dm_realloc(ext->txt, new_len + 1);
if(pos == LV_LABEL_POS_LAST) {
#if TXT_UTF8 == 0
pos = old_len;
#else
pos = txt_len(ext->txt);
#endif
}
txt_ins(ext->txt, pos, txt);
lv_label_refr_text(label);
}
/**
* Set the behavior of the label with longer text then the object size
* @param label pointer to a label object
* @param long_mode the new mode from 'lv_label_long_mode' enum.
*/
void lv_label_set_long_mode(lv_obj_t * label, lv_label_long_mode_t long_mode)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
/*Delete the old animation (if exists)*/
anim_del(label, (anim_fp_t) lv_obj_set_x);
anim_del(label, (anim_fp_t) lv_obj_set_y);
anim_del(label, (anim_fp_t) lv_label_set_offset_x);
anim_del(label, (anim_fp_t) lv_label_set_offset_y);
ext->offset.x = 0;
ext->offset.y = 0;
if(long_mode == LV_LABEL_LONG_ROLL) ext->expand = 1;
else ext->expand = 0;
ext->long_mode = long_mode;
lv_label_refr_text(label);
}
void lv_label_set_align(lv_obj_t *label, lv_label_align_t align)
{
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
ext->align = align;
lv_obj_invalidate(label); /*Enough to invalidate because alignment is only drawing related (lv_refr_label_text() not required)*/
}
/**
* Enable the recoloring by in-line commands
* @param label pointer to a label object
* @param recolor_enable true: enable recoloring, false: disable
*/
void lv_label_set_recolor(lv_obj_t * label, bool recolor_enable)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
ext->recolor = recolor_enable == false ? 0 : 1;
lv_label_refr_text(label); /*Refresh the text because the potential colo codes in text needs to be hided or revealed*/
}
/**
* Set the label to ignore (or accept) line breaks on '\n'
* @param label pointer to a label object
* @param no_break_enable true: ignore line breaks, false: make line breaks on '\n'
*/
void lv_label_set_no_break(lv_obj_t * label, bool no_break_enable)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
ext->no_break = no_break_enable == false ? 0 : 1;
lv_label_refr_text(label);
}
/**
* Set the label to draw (or not draw) background specified in its style's body
* @param label pointer to a label object
* @param body_enable true: draw body; false: don't draw body
*/
void lv_label_set_body_draw(lv_obj_t *label, bool body_enable)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
ext->body_draw = body_enable == false ? 0 : 1;
lv_obj_invalidate(label);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the text of a label
* @param label pointer to a label object
* @return the text of the label
*/
char * lv_label_get_text(lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->txt;
}
/**
* Get the long mode of a label
* @param label pointer to a label object
* @return the long mode
*/
lv_label_long_mode_t lv_label_get_long_mode(lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->long_mode;
}
/**
* Get the align attribute
* @param label pointer to a label object
* @return LV_LABEL_ALIGN_LEFT or LV_LABEL_ALIGN_CENTER
*/
lv_label_align_t lv_label_get_align(lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->align;
}
/**
* Get the recoloring attribute
* @param label pointer to a label object
* @return true: recoloring is enabled, false: disable
*/
bool lv_label_get_recolor(lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->recolor == 0 ? false : true;
}
/**
* Get the no break attribute
* @param label pointer to a label object
* @return true: no_break_enabled (ignore '\n' line breaks); false: make line breaks on '\n'
*/
bool lv_label_get_no_break(lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->no_break == 0 ? false : true;
}
/**
* Get the body draw attribute
* @param label pointer to a label object
* @return true: draw body; false: don't draw body
*/
bool lv_label_get_body_draw(lv_obj_t *label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->body_draw == 0 ? false : true;
}
/**
* Get the relative x and y coordinates of a letter
* @param label pointer to a label object
* @param index index of the letter [0 ... text length]. Expressed in character index, not byte index (different in UTF-8)
* @param pos store the result here (E.g. index = 0 gives 0;0 coordinates)
*/
void lv_label_get_letter_pos(lv_obj_t * label, uint16_t index, point_t * pos)
{
const char * txt = lv_label_get_text(label);
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
uint32_t line_start = 0;
uint32_t new_line_start = 0;
cord_t max_w = lv_obj_get_width(label);
lv_style_t * style = lv_obj_get_style(label);
const font_t * font = style->text.font;
uint8_t letter_height = font_get_height(font) >> FONT_ANTIALIAS;
cord_t y = 0;
txt_flag_t flag = TXT_FLAG_NONE;
if(ext->recolor != 0) flag |= TXT_FLAG_RECOLOR;
if(ext->expand != 0) flag |= TXT_FLAG_EXPAND;
if(ext->no_break != 0) flag |= TXT_FLAG_NO_BREAK;
if(ext->align == LV_LABEL_ALIGN_CENTER) flag |= TXT_FLAG_CENTER;
/*If the width will be expanded the set the max length to very big */
if(ext->long_mode == LV_LABEL_LONG_EXPAND || ext->long_mode == LV_LABEL_LONG_SCROLL) {
max_w = CORD_MAX;
}
index = txt_utf8_get_byte_id(txt, index);
/*Search the line of the index letter */;
while (txt[new_line_start] != '\0') {
new_line_start += txt_get_next_line(&txt[line_start], font, style->text.letter_space, max_w, flag);
if(index < new_line_start || txt[new_line_start] == '\0') break; /*The line of 'index' letter begins at 'line_start'*/
y += letter_height + style->text.line_space;
line_start = new_line_start;
}
/*If the last character is line break then go to the next line*/
if((txt[index - 1] == '\n' || txt[index - 1] == '\r') && txt[index] == '\0') {
y += letter_height + style->text.line_space;
line_start = index;
}
/*Calculate the x coordinate*/
cord_t x = 0;
uint32_t i = line_start;
uint32_t cnt = line_start; /*Count the letter (in UTF-8 1 letter not 1 byte)*/
txt_cmd_state_t cmd_state = TXT_CMD_STATE_WAIT;
uint32_t letter;
while(cnt < index) {
cnt += txt_utf8_size(txt[i]);
letter = txt_utf8_next(txt, &i);
/*Handle the recolor command*/
if((flag & TXT_FLAG_RECOLOR) != 0) {
if(txt_is_cmd(&cmd_state, txt[i]) != false) {
continue; /*Skip the letter is it is part of a command*/
}
}
x += (font_get_width(font, letter) >> FONT_ANTIALIAS) + style->text.letter_space;
}
if(ext->align == LV_LABEL_ALIGN_CENTER) {
cord_t line_w;
line_w = txt_get_width(&txt[line_start], new_line_start - line_start,
font, style->text.letter_space, flag);
x += lv_obj_get_width(label) / 2 - line_w / 2;
}
pos->x = x;
pos->y = y;
}
/**
* Get the index of letter on a relative point of a label
* @param label pointer to label object
* @param pos pointer to point with coordinates on a the label
* @return the index of the letter on the 'pos_p' point (E.g. on 0;0 is the 0. letter)
* Expressed in character index and not byte index (different in UTF-8)
*/
uint16_t lv_label_get_letter_on(lv_obj_t * label, point_t * pos)
{
const char * txt = lv_label_get_text(label);
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
uint32_t line_start = 0;
uint32_t new_line_start = 0;
cord_t max_w = lv_obj_get_width(label);
lv_style_t * style = lv_obj_get_style(label);
const font_t * font = style->text.font;
uint8_t letter_height = font_get_height(font) >> FONT_ANTIALIAS;
cord_t y = 0;
txt_flag_t flag = TXT_FLAG_NONE;
if(ext->recolor != 0) flag |= TXT_FLAG_RECOLOR;
if(ext->expand != 0) flag |= TXT_FLAG_EXPAND;
if(ext->no_break != 0) flag |= TXT_FLAG_NO_BREAK;
if(ext->align == LV_LABEL_ALIGN_CENTER) flag |= TXT_FLAG_CENTER;
/*If the width will be expanded set the max length to very big */
if(ext->long_mode == LV_LABEL_LONG_EXPAND || ext->long_mode == LV_LABEL_LONG_SCROLL) {
max_w = CORD_MAX;
}
/*Search the line of the index letter */;
while (txt[line_start] != '\0') {
new_line_start += txt_get_next_line(&txt[line_start], font, style->text.letter_space, max_w, flag);
if(pos->y <= y + letter_height) break; /*The line is found (stored in 'line_start')*/
y += letter_height + style->text.line_space;
line_start = new_line_start;
}
/*Calculate the x coordinate*/
cord_t x = 0;
if(ext->align == LV_LABEL_ALIGN_CENTER) {
cord_t line_w;
line_w = txt_get_width(&txt[line_start], new_line_start - line_start,
font, style->text.letter_space, flag);
x += lv_obj_get_width(label) / 2 - line_w / 2;
}
txt_cmd_state_t cmd_state = TXT_CMD_STATE_WAIT;
uint32_t i = line_start;
uint32_t i_current = i;
uint32_t letter;
while(i < new_line_start - 1) {
letter = txt_utf8_next(txt, &i); /*Be careful 'i' already points to the next character*/
/*Handle the recolor command*/
if((flag & TXT_FLAG_RECOLOR) != 0) {
if(txt_is_cmd(&cmd_state, txt[i]) != false) {
continue; /*Skip the letter is it is part of a command*/
}
}
x += (font_get_width(font, letter) >> FONT_ANTIALIAS);
if(pos->x < x) {
i = i_current;
break;
}
x += style->text.letter_space;
i_current = i;
}
return txt_utf8_get_char_id(txt, i);
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the labels
* @param label pointer to a label object
* @param mask the object will be drawn only in this area
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
* (return 'true' if yes)
* LV_DESIGN_DRAW: draw the object (always return 'true')
* LV_DESIGN_DRAW_POST: drawing after every children are drawn
* @param return true/false, depends on 'mode'
*/
static bool lv_label_design(lv_obj_t * label, const area_t * mask, lv_design_mode_t mode)
{
/* A label never covers an area */
if(mode == LV_DESIGN_COVER_CHK) return false;
else if(mode == LV_DESIGN_DRAW_MAIN) {
area_t cords;
lv_style_t * style = lv_obj_get_style(label);
lv_obj_get_coords(label, &cords);
#if LV_OBJ_GROUP != 0
lv_group_t * g = lv_obj_get_group(label);
if(lv_group_get_focused(g) == label) {
lv_draw_rect(&cords, mask, style);
}
#endif
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(ext->body_draw) lv_draw_rect(&cords, mask, style);
/*TEST: draw a background for the label*/
// lv_vfill(&label->coords, mask, COLOR_LIME, OPA_COVER);
txt_flag_t flag = TXT_FLAG_NONE;
if(ext->recolor != 0) flag |= TXT_FLAG_RECOLOR;
if(ext->expand != 0) flag |= TXT_FLAG_EXPAND;
if(ext->no_break != 0) flag |= TXT_FLAG_NO_BREAK;
if(ext->align == LV_LABEL_ALIGN_CENTER) flag |= TXT_FLAG_CENTER;
lv_draw_label(&cords, mask, style, ext->txt, flag, &ext->offset);
}
return true;
}
/**
* Refresh the label with its text stored in its extended data
* @param label pointer to a label object
*/
static void lv_label_refr_text(lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(ext->txt == NULL) return;
cord_t max_w = lv_obj_get_width(label);
lv_style_t * style = lv_obj_get_style(label);
const font_t * font = style->text.font;
ext->dot_end = LV_LABEL_DOT_END_INV; /*Initialize the dot end index*/
/*If the width will be expanded set the max length to very big */
if(ext->long_mode == LV_LABEL_LONG_EXPAND ||
ext->long_mode == LV_LABEL_LONG_SCROLL) {
max_w = CORD_MAX;
}
/*Calc. the height and longest line*/
point_t size;
txt_flag_t flag = TXT_FLAG_NONE;
if(ext->recolor != 0) flag |= TXT_FLAG_RECOLOR;
if(ext->expand != 0) flag |= TXT_FLAG_EXPAND;
if(ext->no_break != 0) flag |= TXT_FLAG_NO_BREAK;
txt_get_size(&size, ext->txt, font, style->text.letter_space, style->text.line_space, max_w, flag);
/*Refresh the full size in expand mode*/
if(ext->long_mode == LV_LABEL_LONG_EXPAND || ext->long_mode == LV_LABEL_LONG_SCROLL) {
lv_obj_set_size(label, size.x, size.y);
/*Start scrolling if the label is greater then its parent*/
if(ext->long_mode == LV_LABEL_LONG_SCROLL) {
lv_obj_t * parent = lv_obj_get_parent(label);
/*Delete the potential previous scroller animations*/
anim_del(label, (anim_fp_t) lv_obj_set_x);
anim_del(label, (anim_fp_t) lv_obj_set_y);
anim_t anim;
anim.var = label;
anim.repeat = 1;
anim.playback = 1;
anim.start = font_get_width(font, ' ') >> FONT_ANTIALIAS;
anim.act_time = 0;
anim.end_cb = NULL;
anim.path = anim_get_path(ANIM_PATH_LIN);
anim.time = 3000;
anim.playback_pause = LV_LABEL_SCROLL_PLAYBACK_PAUSE;
anim.repeat_pause = LV_LABEL_SCROLL_REPEAT_PAUSE;
bool hor_anim = false;
if(lv_obj_get_width(label) > lv_obj_get_width(parent)) {
anim.end = lv_obj_get_width(parent) - lv_obj_get_width(label) -
(font_get_width(font, ' ') >> FONT_ANTIALIAS);
anim.fp = (anim_fp_t) lv_obj_set_x;
anim.time = anim_speed_to_time(LV_LABEL_SCROLL_SPEED, anim.start, anim.end);
anim_create(&anim);
hor_anim = true;
}
if(lv_obj_get_height(label) > lv_obj_get_height(parent)) {
anim.end = lv_obj_get_height(parent) - lv_obj_get_height(label) -
(font_get_height(font) >> FONT_ANTIALIAS);
anim.fp = (anim_fp_t)lv_obj_set_y;
/*Different animation speed if horizontal animation is created too*/
if(hor_anim == false) {
anim.time = anim_speed_to_time(LV_LABEL_SCROLL_SPEED, anim.start, anim.end);
} else {
anim.time = anim_speed_to_time(LV_LABEL_SCROLL_SPEED_VER, anim.start, anim.end);
}
anim_create(&anim);
}
}
}
/*In roll mode keep the size but start offset animations*/
else if(ext->long_mode == LV_LABEL_LONG_ROLL) {
anim_t anim;
anim.var = label;
anim.repeat = 1;
anim.playback = 1;
anim.start = font_get_width(font, ' ') >> FONT_ANTIALIAS;
anim.act_time = 0;
anim.end_cb = NULL;
anim.path = anim_get_path(ANIM_PATH_LIN);
anim.playback_pause = LV_LABEL_SCROLL_PLAYBACK_PAUSE;
anim.repeat_pause = LV_LABEL_SCROLL_REPEAT_PAUSE;
bool hor_anim = false;
if(size.x > lv_obj_get_width(label)) {
anim.end = lv_obj_get_width(label) - size.x -
(font_get_width(font, ' ') >> FONT_ANTIALIAS);
anim.fp = (anim_fp_t) lv_label_set_offset_x;
anim.time = anim_speed_to_time(LV_LABEL_SCROLL_SPEED, anim.start, anim.end);
anim_create(&anim);
hor_anim = true;
} else {
/*Delete the offset animation if not required*/
anim_del(label, (anim_fp_t) lv_label_set_offset_x);
ext->offset.x = 0;
}
if(size.y > lv_obj_get_height(label)) {
anim.end = lv_obj_get_height(label) - size.y -
(font_get_height(font) >> FONT_ANTIALIAS);
anim.fp = (anim_fp_t)lv_label_set_offset_y;
/*Different animation speed if horizontal animation is created too*/
if(hor_anim == false) {
anim.time = anim_speed_to_time(LV_LABEL_SCROLL_SPEED, anim.start, anim.end);
} else {
anim.time = anim_speed_to_time(LV_LABEL_SCROLL_SPEED_VER, anim.start, anim.end);
}
anim_create(&anim);
} else {
/*Delete the offset animation if not required*/
anim_del(label, (anim_fp_t) lv_label_set_offset_y);
ext->offset.y = 0;
}
}
/*In break mode only the height can change*/
else if (ext->long_mode == LV_LABEL_LONG_BREAK) {
lv_obj_set_height(label, size.y);
}
lv_obj_invalidate(label);
}
static void lv_label_set_offset_x(lv_obj_t * label, cord_t x)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
ext->offset.x = x;
lv_obj_invalidate(label);
}
static void lv_label_set_offset_y(lv_obj_t * label, cord_t y)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
ext->offset.y = y;
lv_obj_invalidate(label);
}
#endif
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