1 #include "../../lv_examples.h"
2 #if LV_USE_METER && LV_BUILD_EXAMPLES
3
4 static lv_obj_t * meter;
5
set_value(void * indic,int32_t v)6 static void set_value(void * indic, int32_t v)
7 {
8 lv_meter_set_indicator_value(meter, indic, v);
9 }
10
11 /**
12 * A simple meter
13 */
lv_example_meter_1(void)14 void lv_example_meter_1(void)
15 {
16 meter = lv_meter_create(lv_scr_act());
17 lv_obj_center(meter);
18 lv_obj_set_size(meter, 200, 200);
19
20 /*Add a scale first*/
21 lv_meter_scale_t * scale = lv_meter_add_scale(meter);
22 lv_meter_set_scale_ticks(meter, scale, 41, 2, 10, lv_palette_main(LV_PALETTE_GREY));
23 lv_meter_set_scale_major_ticks(meter, scale, 8, 4, 15, lv_color_black(), 10);
24
25 lv_meter_indicator_t * indic;
26
27 /*Add a blue arc to the start*/
28 indic = lv_meter_add_arc(meter, scale, 3, lv_palette_main(LV_PALETTE_BLUE), 0);
29 lv_meter_set_indicator_start_value(meter, indic, 0);
30 lv_meter_set_indicator_end_value(meter, indic, 20);
31
32 /*Make the tick lines blue at the start of the scale*/
33 indic = lv_meter_add_scale_lines(meter, scale, lv_palette_main(LV_PALETTE_BLUE), lv_palette_main(LV_PALETTE_BLUE),
34 false, 0);
35 lv_meter_set_indicator_start_value(meter, indic, 0);
36 lv_meter_set_indicator_end_value(meter, indic, 20);
37
38 /*Add a red arc to the end*/
39 indic = lv_meter_add_arc(meter, scale, 3, lv_palette_main(LV_PALETTE_RED), 0);
40 lv_meter_set_indicator_start_value(meter, indic, 80);
41 lv_meter_set_indicator_end_value(meter, indic, 100);
42
43 /*Make the tick lines red at the end of the scale*/
44 indic = lv_meter_add_scale_lines(meter, scale, lv_palette_main(LV_PALETTE_RED), lv_palette_main(LV_PALETTE_RED), false,
45 0);
46 lv_meter_set_indicator_start_value(meter, indic, 80);
47 lv_meter_set_indicator_end_value(meter, indic, 100);
48
49 /*Add a needle line indicator*/
50 indic = lv_meter_add_needle_line(meter, scale, 4, lv_palette_main(LV_PALETTE_GREY), -10);
51
52 /*Create an animation to set the value*/
53 lv_anim_t a;
54 lv_anim_init(&a);
55 lv_anim_set_exec_cb(&a, set_value);
56 lv_anim_set_var(&a, indic);
57 lv_anim_set_values(&a, 0, 100);
58 lv_anim_set_time(&a, 2000);
59 lv_anim_set_repeat_delay(&a, 100);
60 lv_anim_set_playback_time(&a, 500);
61 lv_anim_set_playback_delay(&a, 100);
62 lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE);
63 lv_anim_start(&a);
64 }
65
66 #endif
67
