1 #include "../../lv_examples.h"
2 #if LV_USE_ROLLER && LV_BUILD_EXAMPLES
3 
event_handler(lv_event_t * e)4 static void event_handler(lv_event_t * e)
5 {
6     lv_event_code_t code = lv_event_get_code(e);
7     lv_obj_t * obj = lv_event_get_target(e);
8     if(code == LV_EVENT_VALUE_CHANGED) {
9         char buf[32];
10         lv_roller_get_selected_str(obj, buf, sizeof(buf));
11         LV_LOG_USER("Selected month: %s\n", buf);
12     }
13 }
14 
15 /**
16  * An infinite roller with the name of the months
17  */
lv_example_roller_1(void)18 void lv_example_roller_1(void)
19 {
20     lv_obj_t * roller1 = lv_roller_create(lv_scr_act());
21     lv_roller_set_options(roller1,
22                           "January\n"
23                           "February\n"
24                           "March\n"
25                           "April\n"
26                           "May\n"
27                           "June\n"
28                           "July\n"
29                           "August\n"
30                           "September\n"
31                           "October\n"
32                           "November\n"
33                           "December",
34                           LV_ROLLER_MODE_INFINITE);
35 
36     lv_roller_set_visible_row_count(roller1, 4);
37     lv_obj_center(roller1);
38     lv_obj_add_event_cb(roller1, event_handler, LV_EVENT_ALL, NULL);
39 }
40 
41 #endif
42