#include "../../../lvgl.h"
#if LV_USE_SLIDER && LV_BUILD_EXAMPLES

static void slider_event_cb(lv_obj_t * slider, lv_event_t event);

static lv_style_t style_pr;
static lv_style_t style_def;

/**
 * Show the current value when the slider if pressed (using only styles).
 *
 */
void lv_example_slider_2(void)
{
    lv_style_init(&style_def);
    lv_style_set_content_opa(&style_def, LV_OPA_TRANSP);
    lv_style_set_content_align(&style_def, LV_ALIGN_OUT_TOP_MID);

    lv_style_init(&style_pr);
    lv_style_set_content_opa(&style_pr, LV_OPA_COVER);
    lv_style_set_content_ofs_y(&style_pr, -15);

    /* Create a slider in the center of the display */
    lv_obj_t * slider;
    slider = lv_slider_create(lv_scr_act(), NULL);
    lv_obj_align(slider, NULL, LV_ALIGN_CENTER, 0, 0);
    lv_obj_add_event_cb(slider, slider_event_cb, NULL);

    lv_obj_add_style(slider, LV_PART_KNOB, LV_STATE_DEFAULT, &style_def);
    lv_obj_add_style(slider, LV_PART_KNOB, LV_STATE_PRESSED, &style_pr);
}

static void slider_event_cb(lv_obj_t * slider, lv_event_t event)
{
    if(event == LV_EVENT_VALUE_CHANGED) {
        static char buf[8];
        lv_snprintf(buf, sizeof(buf), "%u", lv_slider_get_value(slider));
        lv_obj_set_style_content_text(slider, LV_PART_KNOB, LV_STATE_DEFAULT, buf);
    }
}

#endif