1 #include "../../lv_examples.h"
2 #if LV_USE_OBSERVER && LV_USE_SLIDER && LV_USE_LABEL && LV_BUILD_EXAMPLES
3 
4 static lv_subject_t temperature_subject;
5 
6 /**
7  * A slider sends a message on value change and a label display's that value
8  */
lv_example_observer_1(void)9 void lv_example_observer_1(void)
10 {
11     lv_subject_init_int(&temperature_subject, 28);
12 
13     /*Create a slider in the center of the display*/
14     lv_obj_t * slider = lv_slider_create(lv_screen_active());
15     lv_obj_center(slider);
16     lv_slider_bind_value(slider, &temperature_subject);
17 
18     /*Create a label below the slider*/
19     lv_obj_t * label = lv_label_create(lv_screen_active());
20     lv_obj_align(label, LV_ALIGN_CENTER, 0, 30);
21     lv_label_bind_text(label, &temperature_subject, "%d °C");
22 }
23 
24 #endif
25