acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_example_meter_1.c (2366B)
      1 #include "../../lv_examples.h"
      2 #if LV_USE_METER && LV_BUILD_EXAMPLES
      3 
      4 static lv_obj_t * meter;
      5 
      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  */
     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