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35 lines
1.0 KiB
C
35 lines
1.0 KiB
C
#include "../../../lvgl.h"
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#if LV_USE_SLIDER && LV_BUILD_EXAMPLES
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static void slider_event_cb(lv_obj_t * slider, lv_event_t event);
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static lv_obj_t * slider_label;
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/**
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* A default slider with a label displaying the current value
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*/
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void lv_example_slider_1(void)
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{
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/*Create a slider in the center of the display*/
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lv_obj_t * slider = lv_slider_create(lv_scr_act(), NULL);
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lv_obj_align(slider, NULL, LV_ALIGN_CENTER, 0, 0);
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lv_obj_add_event_cb(slider, slider_event_cb, NULL);
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/*Create a label below the slider*/
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slider_label = lv_label_create(lv_scr_act(), NULL);
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lv_label_set_text(slider_label, "0%");
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lv_obj_align(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
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}
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static void slider_event_cb(lv_obj_t * slider, lv_event_t event)
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{
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if(event == LV_EVENT_VALUE_CHANGED) {
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char buf[8];
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lv_snprintf(buf, sizeof(buf), "%d%%", lv_slider_get_value(slider));
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lv_label_set_text(slider_label, buf);
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lv_obj_align(slider_label, slider, LV_ALIGN_OUT_BOTTOM_MID, 0, 10);
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}
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}
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#endif
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