（LVGL）案例预览 文本

void lv_example_label_1(void)
{
    lv_obj_t * label1 = lv_label_create(lv_screen_active());
    lv_label_set_long_mode(label1, LV_LABEL_LONG_MODE_WRAP);     /*Break the long lines*/
    lv_label_set_recolor(label1, true);                      /*Enable re-coloring by commands in the text*/
    lv_label_set_text(label1, "#0000ff Re-color# #ff00ff words# #ff0000 of a# label, align the lines to the center "
                      "and wrap long text automatically.");
    lv_obj_set_width(label1, 150);  /*Set smaller width to make the lines wrap*/
    lv_obj_set_style_text_align(label1, LV_TEXT_ALIGN_CENTER, 0);
    lv_obj_align(label1, LV_ALIGN_CENTER, 0, -40);

    lv_obj_t * label2 = lv_label_create(lv_screen_active());
    lv_label_set_long_mode(label2, LV_LABEL_LONG_MODE_SCROLL_CIRCULAR);     /*Circular scroll*/
    lv_obj_set_width(label2, 150);
    lv_label_set_text(label2, "It is a circularly scrolling text. ");
    lv_obj_align(label2, LV_ALIGN_CENTER, 0, 40);
}

static void click_event_cb(lv_event_t * e)
{
    lv_indev_t * indev = lv_event_get_indev(e);
    lv_point_t point;
    lv_indev_get_point(indev, &point);
#if LV_USE_LOG
    lv_obj_t * spans = lv_event_get_target_obj(e);
    lv_span_t * span = lv_spangroup_get_span_by_point(spans, &point);
    LV_LOG_USER("%s", span ? lv_span_get_text(span) : "NULL");
#endif
}

/**
 * Create spans and get clicked one
 */
void lv_example_span_1(void)
{
    static lv_style_t style;
    lv_style_init(&style);
    lv_style_set_border_width(&style, 1);
    lv_style_set_border_color(&style, lv_palette_main(LV_PALETTE_ORANGE));
    lv_style_set_pad_all(&style, 2);

    lv_obj_t * spans = lv_spangroup_create(lv_screen_active());
    /* Setting a fixed width and height to LV_SIZE_CONTENT will make the text wrap */
    lv_obj_set_width(spans, 300);
    lv_obj_set_height(spans, LV_SIZE_CONTENT);
    lv_obj_center(spans);
    lv_obj_add_style(spans, &style, 0);
    lv_obj_add_flag(spans, LV_OBJ_FLAG_CLICKABLE);

    lv_spangroup_set_align(spans, LV_TEXT_ALIGN_LEFT);
    lv_spangroup_set_overflow(spans, LV_SPAN_OVERFLOW_CLIP);
    lv_spangroup_set_indent(spans, 20);

    lv_span_t * span = lv_spangroup_add_span(spans);
    lv_span_set_text(span, "China is a beautiful country.");
    lv_style_set_text_color(lv_span_get_style(span), lv_palette_main(LV_PALETTE_RED));
    lv_style_set_text_decor(lv_span_get_style(span), LV_TEXT_DECOR_UNDERLINE);
    lv_style_set_text_opa(lv_span_get_style(span), LV_OPA_50);

    span = lv_spangroup_add_span(spans);
    lv_span_set_text_static(span, "good good study, day day up.");
#if LV_FONT_MONTSERRAT_24
    lv_style_set_text_font(lv_span_get_style(span),  &lv_font_montserrat_24);
#endif
    lv_style_set_text_color(lv_span_get_style(span), lv_palette_main(LV_PALETTE_GREEN));

    span = lv_spangroup_add_span(spans);
    lv_span_set_text_static(span, "LVGL is an open-source graphics library.");
    lv_style_set_text_color(lv_span_get_style(span), lv_palette_main(LV_PALETTE_BLUE));

    span = lv_spangroup_add_span(spans);
    lv_span_set_text_static(span, "the boy no name.");
    lv_style_set_text_color(lv_span_get_style(span), lv_palette_main(LV_PALETTE_GREEN));
#if LV_FONT_MONTSERRAT_20
    lv_style_set_text_font(lv_span_get_style(span), &lv_font_montserrat_20);
#endif
    lv_style_set_text_decor(lv_span_get_style(span), LV_TEXT_DECOR_UNDERLINE);

    span = lv_spangroup_add_span(spans);
    lv_span_set_text(span, "I have a dream that hope to come true.");
    lv_style_set_text_decor(lv_span_get_style(span), LV_TEXT_DECOR_STRIKETHROUGH);

    lv_spangroup_refresh(spans);

    lv_obj_add_event_cb(spans, click_event_cb, LV_EVENT_CLICKED, NULL);
}