34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
#include "../lv_examples.h"
|
|
#if LV_BUILD_EXAMPLES && LV_USE_SLIDER
|
|
|
|
static lv_obj_t * label;
|
|
|
|
static void slider_event_cb(lv_event_t * e)
|
|
{
|
|
lv_obj_t * slider = lv_event_get_target(e);
|
|
|
|
/*Refresh the text*/
|
|
lv_label_set_text_fmt(label, "%"LV_PRId32, lv_slider_get_value(slider));
|
|
lv_obj_align_to(label, slider, LV_ALIGN_OUT_TOP_MID, 0, -15); /*Align top of the slider*/
|
|
}
|
|
|
|
/**
|
|
* Create a slider and write its value on a label.
|
|
*/
|
|
void lv_example_get_started_3(void)
|
|
{
|
|
/*Create a slider in the center of the display*/
|
|
lv_obj_t * slider = lv_slider_create(lv_scr_act());
|
|
lv_obj_set_width(slider, 200); /*Set the width*/
|
|
lv_obj_center(slider); /*Align to the center of the parent (screen)*/
|
|
lv_obj_add_event_cb(slider, slider_event_cb, LV_EVENT_VALUE_CHANGED, NULL); /*Assign an event function*/
|
|
|
|
/*Create a label below the slider*/
|
|
label = lv_label_create(lv_scr_act());
|
|
lv_label_set_text(label, "0");
|
|
lv_obj_align_to(label, slider, LV_ALIGN_OUT_TOP_MID, 0, -15); /*Align top of the slider*/
|
|
}
|
|
|
|
#endif
|
|
|