acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_example_get_started_3.c (1122B)
      1 #include "../lv_examples.h"
      2 #if LV_BUILD_EXAMPLES && LV_USE_SLIDER
      3 
      4 static lv_obj_t * label;
      5 
      6 static void slider_event_cb(lv_event_t * e)
      7 {
      8     lv_obj_t * slider = lv_event_get_target(e);
      9 
     10     /*Refresh the text*/
     11     lv_label_set_text_fmt(label, "%"LV_PRId32, lv_slider_get_value(slider));
     12     lv_obj_align_to(label, slider, LV_ALIGN_OUT_TOP_MID, 0, -15);    /*Align top of the slider*/
     13 }
     14 
     15 /**
     16  * Create a slider and write its value on a label.
     17  */
     18 void lv_example_get_started_3(void)
     19 {
     20     /*Create a slider in the center of the display*/
     21     lv_obj_t * slider = lv_slider_create(lv_scr_act());
     22     lv_obj_set_width(slider, 200);                          /*Set the width*/
     23     lv_obj_center(slider);                                  /*Align to the center of the parent (screen)*/
     24     lv_obj_add_event_cb(slider, slider_event_cb, LV_EVENT_VALUE_CHANGED, NULL);     /*Assign an event function*/
     25 
     26     /*Create a label below the slider*/
     27     label = lv_label_create(lv_scr_act());
     28     lv_label_set_text(label, "0");
     29     lv_obj_align_to(label, slider, LV_ALIGN_OUT_TOP_MID, 0, -15);    /*Align top of the slider*/
     30 }
     31 
     32 #endif
     33