acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_example_chart_3.c (2845B)
      1 #include "../../lv_examples.h"
      2 #if LV_USE_CHART && LV_BUILD_EXAMPLES
      3 
      4 static void draw_event_cb(lv_event_t * e)
      5 {
      6     lv_obj_draw_part_dsc_t * dsc = lv_event_get_draw_part_dsc(e);
      7     if(!lv_obj_draw_part_check_type(dsc, &lv_chart_class, LV_CHART_DRAW_PART_TICK_LABEL)) return;
      8 
      9     if(dsc->id == LV_CHART_AXIS_PRIMARY_X && dsc->text) {
     10         const char * month[] = {"Jan", "Febr", "March", "Apr", "May", "Jun", "July", "Aug", "Sept", "Oct", "Nov", "Dec"};
     11         lv_snprintf(dsc->text, dsc->text_length, "%s", month[dsc->value]);
     12     }
     13 }
     14 
     15 /**
     16  * Add ticks and labels to the axis and demonstrate scrolling
     17  */
     18 void lv_example_chart_3(void)
     19 {
     20     /*Create a chart*/
     21     lv_obj_t * chart;
     22     chart = lv_chart_create(lv_scr_act());
     23     lv_obj_set_size(chart, 200, 150);
     24     lv_obj_center(chart);
     25     lv_chart_set_type(chart, LV_CHART_TYPE_BAR);
     26     lv_chart_set_range(chart, LV_CHART_AXIS_PRIMARY_Y, 0, 100);
     27     lv_chart_set_range(chart, LV_CHART_AXIS_SECONDARY_Y, 0, 400);
     28     lv_chart_set_point_count(chart, 12);
     29     lv_obj_add_event_cb(chart, draw_event_cb, LV_EVENT_DRAW_PART_BEGIN, NULL);
     30 
     31     /*Add ticks and label to every axis*/
     32     lv_chart_set_axis_tick(chart, LV_CHART_AXIS_PRIMARY_X, 10, 5, 12, 3, true, 40);
     33     lv_chart_set_axis_tick(chart, LV_CHART_AXIS_PRIMARY_Y, 10, 5, 6, 2, true, 50);
     34     lv_chart_set_axis_tick(chart, LV_CHART_AXIS_SECONDARY_Y, 10, 5, 3, 4, true, 50);
     35 
     36     /*Zoom in a little in X*/
     37     lv_chart_set_zoom_x(chart, 800);
     38 
     39     /*Add two data series*/
     40     lv_chart_series_t * ser1 = lv_chart_add_series(chart, lv_palette_lighten(LV_PALETTE_GREEN, 2), LV_CHART_AXIS_PRIMARY_Y);
     41     lv_chart_series_t * ser2 = lv_chart_add_series(chart, lv_palette_darken(LV_PALETTE_GREEN, 2),
     42                                                    LV_CHART_AXIS_SECONDARY_Y);
     43 
     44     /*Set the next points on 'ser1'*/
     45     lv_chart_set_next_value(chart, ser1, 31);
     46     lv_chart_set_next_value(chart, ser1, 66);
     47     lv_chart_set_next_value(chart, ser1, 10);
     48     lv_chart_set_next_value(chart, ser1, 89);
     49     lv_chart_set_next_value(chart, ser1, 63);
     50     lv_chart_set_next_value(chart, ser1, 56);
     51     lv_chart_set_next_value(chart, ser1, 32);
     52     lv_chart_set_next_value(chart, ser1, 35);
     53     lv_chart_set_next_value(chart, ser1, 57);
     54     lv_chart_set_next_value(chart, ser1, 85);
     55     lv_chart_set_next_value(chart, ser1, 22);
     56     lv_chart_set_next_value(chart, ser1, 58);
     57 
     58     lv_coord_t * ser2_array = lv_chart_get_y_array(chart, ser2);
     59     /*Directly set points on 'ser2'*/
     60     ser2_array[0] = 92;
     61     ser2_array[1] = 71;
     62     ser2_array[2] = 61;
     63     ser2_array[3] = 15;
     64     ser2_array[4] = 21;
     65     ser2_array[5] = 35;
     66     ser2_array[6] = 35;
     67     ser2_array[7] = 58;
     68     ser2_array[8] = 31;
     69     ser2_array[9] = 53;
     70     ser2_array[10] = 33;
     71     ser2_array[11] = 73;
     72 
     73     lv_chart_refresh(chart); /*Required after direct set*/
     74 }
     75 
     76 #endif