35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
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#include "../lv_examples.h"
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#if LV_BUILD_EXAMPLES && LV_USE_BTN
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static void btn_event_cb(lv_event_t * e)
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{
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lv_event_code_t code = lv_event_get_code(e);
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lv_obj_t * btn = lv_event_get_target(e);
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if(code == LV_EVENT_CLICKED) {
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static uint8_t cnt = 0;
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cnt++;
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/*Get the first child of the button which is the label and change its text*/
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lv_obj_t * label = lv_obj_get_child(btn, 0);
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lv_label_set_text_fmt(label, "Button: %d", cnt);
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}
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}
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/**
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* Create a button with a label and react on click event.
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*/
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void lv_example_get_started_1(void)
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{
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lv_obj_t * btn = lv_btn_create(lv_scr_act()); /*Add a button the current screen*/
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lv_obj_set_pos(btn, 10, 10); /*Set its position*/
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lv_obj_set_size(btn, 120, 50); /*Set its size*/
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lv_obj_add_event_cb(btn, btn_event_cb, LV_EVENT_ALL, NULL); /*Assign a callback to the button*/
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lv_obj_t * label = lv_label_create(btn); /*Add a label to the button*/
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lv_label_set_text(label, "Button"); /*Set the labels text*/
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lv_obj_center(label);
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}
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#endif
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