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 static lv_obj_t * slider_label;
6
7 /**
8 * A default slider with a label displaying the current value
9 */
lv_example_slider_1(void)10 void lv_example_slider_1(void)
11 {
12 /*Create a slider in the center of the display*/
13 lv_obj_t * slider = lv_slider_create(lv_scr_act());
14 lv_obj_center(slider);
15 lv_obj_add_event_cb(slider, slider_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
16
17 /*Create a label below the slider*/
18 slider_label = lv_label_create(lv_scr_act());
19 lv_label_set_text(slider_label, "0%");
20
21 lv_obj_align_to(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
22 }
23
slider_event_cb(lv_event_t * e)24 static void slider_event_cb(lv_event_t * e)
25 {
26 lv_obj_t * slider = lv_event_get_target(e);
27 char buf[8];
28 lv_snprintf(buf, sizeof(buf), "%d%%", (int)lv_slider_get_value(slider));
29 lv_label_set_text(slider_label, buf);
30 lv_obj_align_to(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
31 }
32
33 #endif
34
