59 lines
1.7 KiB
C
Executable File
59 lines
1.7 KiB
C
Executable File
/*
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* SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: CC0-1.0
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*/
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// This demo UI is adapted from LVGL official example: https://docs.lvgl.io/master/examples.html#loader-with-arc
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#include "lvgl.h"
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static lv_obj_t * btn;
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static lv_disp_rot_t rotation = LV_DISP_ROT_NONE;
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// 按钮点击事件回调
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static void btn_cb(lv_event_t * e)
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{
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lv_disp_t *disp = lv_event_get_user_data(e);
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rotation++;
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if (rotation > LV_DISP_ROT_270) {
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rotation = LV_DISP_ROT_NONE;
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}
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lv_disp_set_rotation(disp, rotation);// 设置显示旋转角度
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}
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static void set_angle(void * obj, int32_t v)
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{
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lv_arc_set_value(obj, v);
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}
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void example_lvgl_demo_ui(lv_disp_t *disp)
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{
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lv_obj_t *scr = lv_disp_get_scr_act(disp);
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btn = lv_btn_create(scr);
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lv_obj_t * lbl = lv_label_create(btn);
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lv_label_set_text_static(lbl, LV_SYMBOL_REFRESH" ROTATE");
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lv_obj_align(btn, LV_ALIGN_BOTTOM_MID, 0, -30); // 按钮居中对齐
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/*Button event*/
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lv_obj_add_event_cb(btn, btn_cb, LV_EVENT_CLICKED, disp);
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/*Create an Arc*/
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lv_obj_t * arc = lv_arc_create(scr);
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lv_arc_set_rotation(arc, 270);
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lv_arc_set_bg_angles(arc, 0, 360);
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lv_obj_remove_style(arc, NULL, LV_PART_KNOB); /*Be sure the knob is not displayed*/
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lv_obj_clear_flag(arc, LV_OBJ_FLAG_CLICKABLE); /*To not allow adjusting by click*/
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lv_obj_center(arc);
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lv_anim_t a;
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lv_anim_init(&a);
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lv_anim_set_var(&a, arc);
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lv_anim_set_exec_cb(&a, set_angle);
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lv_anim_set_time(&a, 1000);
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lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE); /*Just for the demo*/
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lv_anim_set_repeat_delay(&a, 500);
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lv_anim_set_values(&a, 0, 100);
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lv_anim_start(&a);
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}
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