esp-idf/examples/peripherals/lcd/i80_controller/main/lvgl_demo_ui.c

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/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
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*
* SPDX-License-Identifier: CC0-1.0
*/
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#include <math.h>
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#include "lvgl.h"
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#ifndef PI
#define PI (3.14159f)
#endif
// LVGL image declare
LV_IMG_DECLARE(esp_logo)
LV_IMG_DECLARE(esp_text)
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typedef struct {
lv_obj_t *scr;
int count_val;
} my_timer_context_t;
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static lv_obj_t *arc[3];
static lv_obj_t *img_logo;
static lv_obj_t *img_text;
static lv_color_t arc_color[] = {
LV_COLOR_MAKE(232, 87, 116),
LV_COLOR_MAKE(126, 87, 162),
LV_COLOR_MAKE(90, 202, 228),
};
static void anim_timer_cb(lv_timer_t *timer)
{
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my_timer_context_t *timer_ctx = (my_timer_context_t *) timer->user_data;
int count = timer_ctx->count_val;
lv_obj_t *scr = timer_ctx->scr;
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// Play arc animation
if (count < 90) {
lv_coord_t arc_start = count > 0 ? (1 - cosf(count / 180.0f * PI)) * 270 : 0;
lv_coord_t arc_len = (sinf(count / 180.0f * PI) + 1) * 135;
for (size_t i = 0; i < sizeof(arc) / sizeof(arc[0]); i++) {
lv_arc_set_bg_angles(arc[i], arc_start, arc_len);
lv_arc_set_rotation(arc[i], (count + 120 * (i + 1)) % 360);
}
}
// Delete arcs when animation finished
if (count == 90) {
for (size_t i = 0; i < sizeof(arc) / sizeof(arc[0]); i++) {
lv_obj_del(arc[i]);
}
// Create new image and make it transparent
img_text = lv_img_create(scr);
lv_img_set_src(img_text, &esp_text);
lv_obj_set_style_img_opa(img_text, 0, 0);
}
// Move images when arc animation finished
if ((count >= 100) && (count <= 180)) {
lv_coord_t offset = (sinf((count - 140) * 2.25f / 90.0f) + 1) * 20.0f;
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lv_obj_align(img_logo, LV_ALIGN_CENTER, 0, -offset);
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lv_obj_align(img_text, LV_ALIGN_CENTER, 0, 2 * offset);
lv_obj_set_style_img_opa(img_text, offset / 40.0f * 255, 0);
}
// Delete timer when all animation finished
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if ((count += 5) == 220) {
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lv_timer_del(timer);
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} else {
timer_ctx->count_val = count;
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}
}
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void example_lvgl_demo_ui(lv_obj_t *scr)
{
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// Create image
img_logo = lv_img_create(scr);
lv_img_set_src(img_logo, &esp_logo);
lv_obj_center(img_logo);
// Create arcs
for (size_t i = 0; i < sizeof(arc) / sizeof(arc[0]); i++) {
arc[i] = lv_arc_create(scr);
// Set arc caption
lv_obj_set_size(arc[i], 220 - 30 * i, 220 - 30 * i);
lv_arc_set_bg_angles(arc[i], 120 * i, 10 + 120 * i);
lv_arc_set_value(arc[i], 0);
// Set arc style
lv_obj_remove_style(arc[i], NULL, LV_PART_KNOB);
lv_obj_set_style_arc_width(arc[i], 10, 0);
lv_obj_set_style_arc_color(arc[i], arc_color[i], 0);
// Make arc center
lv_obj_center(arc[i]);
}
// Create timer for animation
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static my_timer_context_t my_tim_ctx = {
.count_val = -90,
};
my_tim_ctx.scr = scr;
lv_timer_create(anim_timer_cb, 20, &my_tim_ctx);
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}