the new scale example ported to work with the current master from ---- feature(scale): mutiple line needles #5937

analog_clock.c

static lv_obj_t * scale;
static lv_obj_t * minute_hand;
static lv_obj_t * hour_hand;
static lv_point_precise_t minute_hand_points[2];
static lv_point_precise_t hour_hand_points[2];
static int32_t hour;
static int32_t minute;

static void timer_cb(lv_timer_t * timer)
{
    LV_UNUSED(timer);

    minute++;
    if(minute > 59) {
        minute = 0;
        hour++;
        if(hour > 11) {
            hour = 0;
        }
    }

    lv_scale_set_line_needle_value(scale, minute_hand, 60, minute);
    lv_line_t * mh = (lv_line_t *) minute_hand;
    lv_memcpy(minute_hand_points, mh->point_array, sizeof(minute_hand_points));
    lv_line_set_points(minute_hand, minute_hand_points, 2);

    lv_scale_set_line_needle_value(scale, hour_hand, 40, hour * 5 + (minute / 12));
    lv_line_t * hh = (lv_line_t *) hour_hand;
    lv_memcpy(hour_hand_points, hh->point_array, sizeof(hour_hand_points));
    lv_line_set_points(hour_hand, hour_hand_points, 2);
}

/**
 * A round scale with multiple needles, resembing a clock
 */
void lv_example_scale_6(void)
{
    scale = lv_scale_create(lv_screen_active());

    lv_obj_set_size(scale, 150, 150);
    lv_scale_set_mode(scale, LV_SCALE_MODE_ROUND_INNER);
    lv_obj_set_style_bg_opa(scale, LV_OPA_60, 0);
    lv_obj_set_style_bg_color(scale, lv_color_black(), 0);
    lv_obj_set_style_radius(scale, LV_RADIUS_CIRCLE, 0);
    lv_obj_set_style_clip_corner(scale, true, 0);
    lv_obj_center(scale);

    lv_scale_set_label_show(scale, true);

    lv_scale_set_total_tick_count(scale, 61);
    lv_scale_set_major_tick_every(scale, 5);

    static const char * hour_ticks[] = {"12", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", NULL};
    lv_scale_set_text_src(scale, hour_ticks);

    static lv_style_t indicator_style;
    lv_style_init(&indicator_style);

    /* Label style properties */
    lv_style_set_text_font(&indicator_style, LV_FONT_DEFAULT);
    lv_style_set_text_color(&indicator_style, lv_palette_main(LV_PALETTE_YELLOW));

    /* Major tick properties */
    lv_style_set_line_color(&indicator_style, lv_palette_main(LV_PALETTE_YELLOW));
    lv_style_set_length(&indicator_style, 8); /* tick length */
    lv_style_set_line_width(&indicator_style, 2); /* tick width */
    lv_obj_add_style(scale, &indicator_style, LV_PART_INDICATOR);

    /* Minor tick properties */
    static lv_style_t minor_ticks_style;
    lv_style_init(&minor_ticks_style);
    lv_style_set_line_color(&minor_ticks_style, lv_palette_main(LV_PALETTE_YELLOW));
    lv_style_set_length(&minor_ticks_style, 6); /* tick length */
    lv_style_set_line_width(&minor_ticks_style, 2); /* tick width */
    lv_obj_add_style(scale, &minor_ticks_style, LV_PART_ITEMS);

    /* Main line properties */
    static lv_style_t main_line_style;
    lv_style_init(&main_line_style);
    lv_style_set_arc_color(&main_line_style, lv_color_black());
    lv_style_set_arc_width(&main_line_style, 5);
    lv_obj_add_style(scale, &main_line_style, LV_PART_MAIN);

    lv_scale_set_range(scale, 0, 60);

    lv_scale_set_angle_range(scale, 360);
    lv_scale_set_rotation(scale, 270);

    minute_hand = lv_line_create(scale);

    lv_obj_set_style_line_width(minute_hand, 3, 0);
    lv_obj_set_style_line_rounded(minute_hand, true, 0);
    lv_obj_set_style_line_color(minute_hand, lv_color_white(), 0);

    hour_hand = lv_line_create(scale);

    lv_obj_set_style_line_width(hour_hand, 5, 0);
    lv_obj_set_style_line_rounded(hour_hand, true, 0);
    lv_obj_set_style_line_color(hour_hand, lv_palette_main(LV_PALETTE_RED), 0);

    hour = 11;
    minute = 5;
    lv_timer_t * timer = lv_timer_create(timer_cb, 250, NULL);
    lv_timer_ready(timer);
}