/**
* Draw the scale on a gauge
* @param gauge pointer to gauge object
* @param mask mask of drawing
*/
static void lv_gauge_draw_scale(lv_obj_t * gauge, const lv_area_t * mask)
{
char scale_txt[16];
lv_gauge_ext_t * ext = lv_obj_get_ext_attr(gauge);
lv_style_t * style = lv_obj_get_style(gauge);
lv_coord_t r = lv_obj_get_width(gauge) / 2 - (3 * style->body.padding.hor) - style->body.padding.inner;
lv_coord_t x_ofs = lv_obj_get_width(gauge) / 2 + gauge->coords.x1;
lv_coord_t y_ofs = lv_obj_get_height(gauge) / 2 + gauge->coords.y1;
int16_t scale_angle = lv_lmeter_get_scale_angle(gauge);
uint16_t label_num = ext->label_count;
int16_t angle_ofs = 90 + (360 - scale_angle) / 2;
int16_t min = lv_gauge_get_min_value(gauge);
int16_t max = lv_gauge_get_max_value(gauge);
uint8_t i;
for(i = 0; i < label_num; i++) {
/*Calculate the position a scale label*/
int16_t angle = (i * scale_angle) / (label_num - 1) + angle_ofs;
lv_coord_t y = (int32_t)((int32_t)lv_trigo_sin(angle) * r) / LV_TRIGO_SIN_MAX;
y += y_ofs;
lv_coord_t x = (int32_t)((int32_t)lv_trigo_sin(angle + 90) * r) / LV_TRIGO_SIN_MAX;
x += x_ofs;
int16_t scale_act = (int32_t)((int32_t)(max - min) * i) / (label_num - 1);
scale_act += min;
lv_math_num_to_str(scale_act, scale_txt);
lv_area_t label_cord;
lv_point_t label_size;
lv_txt_get_size(&label_size, scale_txt, style->text.font,
style->text.letter_space, style->text.line_space, LV_COORD_MAX, LV_TXT_FLAG_NONE);
/*Draw the label*/
label_cord.x1 = x - label_size.x / 2;
label_cord.y1 = y - label_size.y / 2;
label_cord.x2 = label_cord.x1 + label_size.x;
label_cord.y2 = label_cord.y1 + label_size.y;
lv_draw_label(&label_cord, mask, style, scale_txt, LV_TXT_FLAG_NONE, NULL);
}
}
/**
* 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->text == NULL) return;
lv_coord_t max_w = lv_obj_get_width(label);
lv_style_t * style = lv_obj_get_style(label);
const lv_font_t * font = style->text.font;
/*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 = LV_COORD_MAX;
}
/*Calc. the height and longest line*/
lv_point_t size;
lv_txt_flag_t flag = LV_TXT_FLAG_NONE;
if(ext->recolor != 0) flag |= LV_TXT_FLAG_RECOLOR;
if(ext->expand != 0) flag |= LV_TXT_FLAG_EXPAND;
if(ext->no_break != 0) flag |= LV_TXT_FLAG_NO_BREAK;
lv_txt_get_size(&size, ext->text, font, style->text.letter_space, style->text.line_space, max_w, flag);
/*Set 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) {
#if USE_LV_ANIMATION
lv_obj_t * parent = lv_obj_get_parent(label);
/*Delete the potential previous scroller animations*/
lv_anim_del(label, (lv_anim_fp_t) lv_obj_set_x);
lv_anim_del(label, (lv_anim_fp_t) lv_obj_set_y);
lv_anim_t anim;
anim.var = label;
anim.repeat = 1;
anim.playback = 1;
anim.start = lv_font_get_width(font, ' ');
anim.act_time = 0;
anim.end_cb = NULL;
anim.path = lv_anim_path_linear;
anim.playback_pause = (((lv_font_get_width(style->text.font, ' ') +
style->text.letter_space) * 1000) / ext->anim_speed) * ANIM_WAIT_CHAR_COUNT;
anim.repeat_pause = anim.playback_pause;
if(lv_obj_get_width(label) > lv_obj_get_width(parent)) {
anim.end = lv_obj_get_width(parent) - lv_obj_get_width(label) - lv_font_get_width(font, ' ');
anim.fp = (lv_anim_fp_t) lv_obj_set_x;
anim.time = lv_anim_speed_to_time(ext->anim_speed, anim.start, anim.end);
lv_anim_create(&anim);
} else if(lv_obj_get_height(label) > lv_obj_get_height(parent)) {
anim.end = lv_obj_get_height(parent) - lv_obj_get_height(label) - lv_font_get_height(font);
anim.fp = (lv_anim_fp_t)lv_obj_set_y;
anim.time = lv_anim_speed_to_time(ext->anim_speed, anim.start, anim.end);
lv_anim_create(&anim);
}
#endif
}
}
/*In roll mode keep the size but start offset animations*/
else if(ext->long_mode == LV_LABEL_LONG_ROLL) {
#if USE_LV_ANIMATION
lv_anim_t anim;
anim.var = label;
anim.repeat = 1;
anim.playback = 1;
anim.start = lv_font_get_width(font, ' ');
anim.act_time = 0;
anim.end_cb = NULL;
anim.path = lv_anim_path_linear;
anim.playback_pause = (((lv_font_get_width(style->text.font, ' ') + style->text.letter_space) * 1000) / ext->anim_speed) * ANIM_WAIT_CHAR_COUNT;;
anim.repeat_pause = anim.playback_pause;
bool hor_anim = false;
if(size.x > lv_obj_get_width(label)) {
anim.end = lv_obj_get_width(label) - size.x - lv_font_get_width(font, ' ');
anim.fp = (lv_anim_fp_t) lv_label_set_offset_x;
anim.time = lv_anim_speed_to_time(ext->anim_speed, anim.start, anim.end);
lv_anim_create(&anim);
hor_anim = true;
} else {
/*Delete the offset animation if not required*/
lv_anim_del(label, (lv_anim_fp_t) lv_label_set_offset_x);
ext->offset.x = 0;
}
if(size.y > lv_obj_get_height(label) && hor_anim == false) {
anim.end = lv_obj_get_height(label) - size.y - (lv_font_get_height(font));
anim.fp = (lv_anim_fp_t)lv_label_set_offset_y;
anim.time = lv_anim_speed_to_time(ext->anim_speed, anim.start, anim.end);
lv_anim_create(&anim);
} else {
/*Delete the offset animation if not required*/
lv_anim_del(label, (lv_anim_fp_t) lv_label_set_offset_y);
ext->offset.y = 0;
}
#endif
}
else if(ext->long_mode == LV_LABEL_LONG_DOT) {
if(size.y <= lv_obj_get_height(label)) { /*No dots are required, the text is short enough*/
ext->dot_end = LV_LABEL_DOT_END_INV;
} else if(lv_txt_get_length(ext->text) <= LV_LABEL_DOT_NUM) { /*Don't turn to dots all the characters*/
ext->dot_end = LV_LABEL_DOT_END_INV;
} else {
lv_point_t p;
p.x = lv_obj_get_width(label) - (lv_font_get_width(style->text.font, '.') + style->text.letter_space) * LV_LABEL_DOT_NUM; /*Shrink with dots*/
p.y = lv_obj_get_height(label);
p.y -= p.y % (lv_font_get_height(style->text.font) + style->text.line_space); /*Round down to the last line*/
p.y -= style->text.line_space; /*Trim the last line space*/
uint32_t letter_id = lv_label_get_letter_on(label, &p);
#if LV_TXT_UTF8 == 0
/*Save letters under the dots and replace them with dots*/
uint8_t i;
for(i = 0; i < LV_LABEL_DOT_NUM; i++) {
ext->dot_tmp[i] = ext->text[letter_id + i];
ext->text[letter_id + i] = '.';
}
ext->dot_tmp[LV_LABEL_DOT_NUM] = ext->text[letter_id + LV_LABEL_DOT_NUM];
ext->text[letter_id + LV_LABEL_DOT_NUM] = '\0';
ext->dot_end = letter_id + LV_LABEL_DOT_NUM;
#else
/*Save letters under the dots and replace them with dots*/
uint32_t i;
uint32_t byte_id = txt_utf8_get_byte_id(ext->text, letter_id);
uint32_t byte_id_ori = byte_id;
uint8_t len = 0;
for(i = 0; i <= LV_LABEL_DOT_NUM; i++) {
len += lv_txt_utf8_size(ext->text[byte_id]);
lv_txt_utf8_next(ext->text, &byte_id);
}
memcpy(ext->dot_tmp, &ext->text[byte_id_ori], len);
ext->dot_tmp[len] = '\0'; /*Close with a zero*/
for(i = 0; i < LV_LABEL_DOT_NUM; i++) {
ext->text[byte_id_ori + i] = '.';
}
ext->text[byte_id_ori + LV_LABEL_DOT_NUM] = '\0';
ext->dot_end = letter_id + LV_LABEL_DOT_NUM;
#endif
}
}
/*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);
}
