1 #include "../lv_examples.h"
2 #if LV_BUILD_EXAMPLES && LV_USE_SLIDER
3
4 static lv_obj_t * label;
5
slider_event_cb(lv_event_t * e)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 */
lv_example_get_started_4(void)18 void lv_example_get_started_4(void)
19 {
20 /*Create a slider in the center of the display*/
21 lv_obj_t * slider = lv_slider_create(lv_screen_active());
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 above the slider*/
27 label = lv_label_create(lv_screen_active());
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
