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