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36 lines
973 B
C
36 lines
973 B
C
2 years ago
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#include "../../lv_examples.h"
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#if LV_USE_ARC && LV_BUILD_EXAMPLES
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static void value_changed_event_cb(lv_event_t * e);
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void lv_example_arc_1(void)
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{
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lv_obj_t * label = lv_label_create(lv_scr_act());
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/*Create an Arc*/
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lv_obj_t * arc = lv_arc_create(lv_scr_act());
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lv_obj_set_size(arc, 150, 150);
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lv_arc_set_rotation(arc, 135);
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lv_arc_set_bg_angles(arc, 0, 270);
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lv_arc_set_value(arc, 10);
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lv_obj_center(arc);
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lv_obj_add_event_cb(arc, value_changed_event_cb, LV_EVENT_VALUE_CHANGED, label);
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/*Manually update the label for the first time*/
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lv_event_send(arc, LV_EVENT_VALUE_CHANGED, NULL);
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}
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static void value_changed_event_cb(lv_event_t * e)
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{
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lv_obj_t * arc = lv_event_get_target(e);
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lv_obj_t * label = lv_event_get_user_data(e);
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lv_label_set_text_fmt(label, "%d%%", lv_arc_get_value(arc));
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/*Rotate the label to the current position of the arc*/
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lv_arc_rotate_obj_to_angle(arc, label, 25);
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}
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#endif
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