树莓派littlevGL系列教程：容器控件(lv_cont)

void cont_test(void)
{
    lv_obj_t * cont;

    cont = lv_cont_create(lv_scr_act(), NULL);
    lv_obj_set_auto_realign(cont, true);                    /*Auto realign when the size changes*/
    lv_obj_align_origo(cont, NULL, LV_ALIGN_CENTER, 0, 0);  /*This parametrs will be sued when realigned*/
    lv_cont_set_fit(cont, LV_FIT_TIGHT);
    lv_cont_set_layout(cont, LV_LAYOUT_COL_M);

    lv_obj_t * label;
    label = lv_label_create(cont, NULL);
    lv_label_set_text(label, "Short text");


    label = lv_label_create(cont, NULL);
    lv_label_set_text(label, "It is a long text");


    label = lv_label_create(cont, NULL);
    lv_label_set_text(label, "Here is an even longer text");
}

/**
 * How to resize the container around the children.
 */
enum {
    LV_FIT_NONE,  /**< Do not change the size automatically*/
    LV_FIT_TIGHT, /**< Shrink wrap around the children */
    LV_FIT_FLOOD, /**< Align the size to the parent's edge*/
    LV_FIT_FILL,  /**< Align the size to the parent's edge first but if there is an object out of it
                     then get larger */
    _LV_FIT_NUM
};
typedef uint8_t lv_fit_t;

/** Container layout options*/
enum {
    LV_LAYOUT_OFF = 0, /**< 无对齐 */
    LV_LAYOUT_CENTER, /**< 居中对齐 */
    LV_LAYOUT_COL_L,  /**< 水平靠左*/
    LV_LAYOUT_COL_M,  /**< 水平居中*/
    LV_LAYOUT_COL_R,  /**< 水平靠右*/
    LV_LAYOUT_ROW_T,  /**< 垂直靠上*/
    LV_LAYOUT_ROW_M,  /**< 垂直居中*/
    LV_LAYOUT_ROW_B,  /**< 垂直靠下*/
    LV_LAYOUT_PRETTY, /**< 行对齐*/
    LV_LAYOUT_GRID,   /**< 网格对齐*/
    _LV_LAYOUT_NUM
};
typedef uint8_t lv_layout_t;