57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: CC0-1.0
|
|
*/
|
|
|
|
// This demo UI is adapted from LVGL official example: https://docs.lvgl.io/master/examples.html#loader-with-arc
|
|
|
|
#include "lvgl.h"
|
|
|
|
static lv_obj_t * btn;
|
|
static lv_display_rotation_t rotation = LV_DISP_ROTATION_0;
|
|
|
|
static void btn_cb(lv_event_t * e)
|
|
{
|
|
lv_display_t *disp = lv_event_get_user_data(e);
|
|
rotation++;
|
|
if (rotation > LV_DISP_ROTATION_270) {
|
|
rotation = LV_DISP_ROTATION_0;
|
|
}
|
|
lv_disp_set_rotation(disp, rotation);
|
|
}
|
|
static void set_angle(void * obj, int32_t v)
|
|
{
|
|
lv_arc_set_value(obj, v);
|
|
}
|
|
|
|
void example_lvgl_demo_ui(lv_display_t *disp)
|
|
{
|
|
lv_obj_t *scr = lv_display_get_screen_active(disp);
|
|
|
|
btn = lv_button_create(scr);
|
|
lv_obj_t * lbl = lv_label_create(btn);
|
|
lv_label_set_text_static(lbl, LV_SYMBOL_REFRESH" ROTATE");
|
|
lv_obj_align(btn, LV_ALIGN_BOTTOM_LEFT, 30, -30);
|
|
/*Button event*/
|
|
lv_obj_add_event_cb(btn, btn_cb, LV_EVENT_CLICKED, disp);
|
|
|
|
/*Create an Arc*/
|
|
lv_obj_t * arc = lv_arc_create(scr);
|
|
lv_arc_set_rotation(arc, 270);
|
|
lv_arc_set_bg_angles(arc, 0, 360);
|
|
lv_obj_remove_style(arc, NULL, LV_PART_KNOB); /*Be sure the knob is not displayed*/
|
|
lv_obj_remove_flag(arc, LV_OBJ_FLAG_CLICKABLE); /*To not allow adjusting by click*/
|
|
lv_obj_center(arc);
|
|
|
|
lv_anim_t a;
|
|
lv_anim_init(&a);
|
|
lv_anim_set_var(&a, arc);
|
|
lv_anim_set_exec_cb(&a, set_angle);
|
|
lv_anim_set_duration(&a, 1000);
|
|
lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE); /*Just for the demo*/
|
|
lv_anim_set_repeat_delay(&a, 500);
|
|
lv_anim_set_values(&a, 0, 100);
|
|
lv_anim_start(&a);
|
|
}
|