acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_example_slider_3.c (1954B)
      1 #include "../../lv_examples.h"
      2 #if LV_USE_SLIDER && LV_BUILD_EXAMPLES
      3 
      4 static void slider_event_cb(lv_event_t * e);
      5 
      6 /**
      7  * Show the current value when the slider is pressed by extending the drawer
      8  *
      9  */
     10 void lv_example_slider_3(void)
     11 {
     12     /*Create a slider in the center of the display*/
     13     lv_obj_t * slider;
     14     slider = lv_slider_create(lv_scr_act());
     15     lv_obj_center(slider);
     16 
     17     lv_slider_set_mode(slider, LV_SLIDER_MODE_RANGE);
     18     lv_slider_set_value(slider, 70, LV_ANIM_OFF);
     19     lv_slider_set_left_value(slider, 20, LV_ANIM_OFF);
     20 
     21     lv_obj_add_event_cb(slider, slider_event_cb, LV_EVENT_ALL, NULL);
     22     lv_obj_refresh_ext_draw_size(slider);
     23 }
     24 
     25 static void slider_event_cb(lv_event_t * e)
     26 {
     27     lv_event_code_t code = lv_event_get_code(e);
     28     lv_obj_t * obj = lv_event_get_target(e);
     29 
     30     /*Provide some extra space for the value*/
     31     if(code == LV_EVENT_REFR_EXT_DRAW_SIZE) {
     32         lv_event_set_ext_draw_size(e, 50);
     33     }
     34     else if(code == LV_EVENT_DRAW_PART_END) {
     35         lv_obj_draw_part_dsc_t * dsc = lv_event_get_draw_part_dsc(e);
     36         if(dsc->part == LV_PART_INDICATOR) {
     37             char buf[16];
     38             lv_snprintf(buf, sizeof(buf), "%d - %d", (int)lv_slider_get_left_value(obj), (int)lv_slider_get_value(obj));
     39 
     40             lv_point_t label_size;
     41             lv_txt_get_size(&label_size, buf, LV_FONT_DEFAULT, 0, 0, LV_COORD_MAX, 0);
     42             lv_area_t label_area;
     43             label_area.x1 = dsc->draw_area->x1 + lv_area_get_width(dsc->draw_area) / 2 - label_size.x / 2;
     44             label_area.x2 = label_area.x1 + label_size.x;
     45             label_area.y2 = dsc->draw_area->y1 - 10;
     46             label_area.y1 = label_area.y2 - label_size.y;
     47 
     48             lv_draw_label_dsc_t label_draw_dsc;
     49             lv_draw_label_dsc_init(&label_draw_dsc);
     50             label_draw_dsc.color = lv_color_hex3(0x888);
     51             lv_draw_label(dsc->draw_ctx, &label_draw_dsc, &label_area, buf, NULL);
     52         }
     53     }
     54 }
     55 
     56 #endif