lv_example_gridnav_2.c

#include "../../lv_examples.h"
#if LV_USE_GRIDNAV && LV_USE_LIST && LV_BUILD_EXAMPLES

/**
 * Grid navigation on a list
 */
void lv_example_gridnav_2(void)
{
    /*It's assumed that the default group is set and
     *there is a keyboard indev*/

    lv_obj_t * list1 = lv_list_create(lv_screen_active());
    lv_gridnav_add(list1, LV_GRIDNAV_CTRL_NONE);
    lv_obj_set_size(list1, lv_pct(45), lv_pct(80));
    lv_obj_align(list1, LV_ALIGN_LEFT_MID, 5, 0);
    lv_obj_set_style_bg_color(list1, lv_palette_lighten(LV_PALETTE_BLUE, 5), LV_STATE_FOCUSED);
    lv_group_add_obj(lv_group_get_default(), list1);

    char buf[32];
    uint32_t i;
    for(i = 0; i < 15; i++) {
        lv_snprintf(buf, sizeof(buf), "File %d", i + 1);
        lv_obj_t * item = lv_list_add_button(list1, LV_SYMBOL_FILE, buf);
        lv_obj_set_style_bg_opa(item, 0, 0);
        lv_group_remove_obj(item);   /*Not needed, we use the gridnav instead*/
    }

    lv_obj_t * list2 = lv_list_create(lv_screen_active());
    lv_gridnav_add(list2, LV_GRIDNAV_CTRL_ROLLOVER);
    lv_obj_set_size(list2, lv_pct(45), lv_pct(80));
    lv_obj_align(list2, LV_ALIGN_RIGHT_MID, -5, 0);
    lv_obj_set_style_bg_color(list2, lv_palette_lighten(LV_PALETTE_BLUE, 5), LV_STATE_FOCUSED);
    lv_group_add_obj(lv_group_get_default(), list2);

    for(i = 0; i < 15; i++) {
        lv_snprintf(buf, sizeof(buf), "Folder %d", i + 1);
        lv_obj_t * item = lv_list_add_button(list2, LV_SYMBOL_DIRECTORY, buf);
        lv_obj_set_style_bg_opa(item, 0, 0);
        lv_group_remove_obj(item);
    }
}

#endif