Animation Image (lv_animimg)¶

Overview¶

The animation image is similar to the normal 'Image' object. The only difference is that instead of one source image, you set an array of multiple source images.

You can specify a duration and repeat count.

Parts and Styles¶

LV_PART_MAIN A background rectangle that uses the typical background style properties and the image itself using the image style properties.

Usage¶

Image sources¶

To set the image in a state, use the lv_animimg_set_src(imgbtn, dsc[], num).

Events¶

No special events are sent by image objects.

See the events of the Base object too.

Learn more about Events.

Keys¶

No Keys are processed by the object type.

Learn more about Keys.

Example¶

Simple Animation Image¶

A simple example to demonstrate the use of an animation image.

#include "../../lv_examples.h"
#if LV_USE_ANIMIMG && LV_BUILD_EXAMPLES
LV_IMG_DECLARE(animimg001)
LV_IMG_DECLARE(animimg002)
LV_IMG_DECLARE(animimg003)

static const lv_img_dsc_t* anim_imgs[3] = {
    &animimg001,
    &animimg002,
    &animimg003,
};

void lv_example_animimg_1(void)
{
    lv_obj_t * animimg0 = lv_animimg_create(lv_scr_act());
    lv_obj_center(animimg0);
    lv_animimg_set_src(animimg0, (lv_img_dsc_t**) anim_imgs, 3);
    lv_animimg_set_duration(animimg0, 1000);
    lv_animimg_set_repeat_count(animimg0, LV_ANIM_REPEAT_INFINITE);
    lv_animimg_start(animimg0);
}

#endif

from imagetools import get_png_info, open_png

# Register PNG image decoder
decoder = lv.img.decoder_create()
decoder.info_cb = get_png_info
decoder.open_cb = open_png

anim_imgs = [None]*3
# Create an image from the png file
try:
    with open('../../assets/animimg001.png','rb') as f:
        anim001_data = f.read()
except:
    print("Could not find animimg001.png")
    sys.exit()
    
anim_imgs[0] = lv.img_dsc_t({
  'data_size': len(anim001_data),
  'data': anim001_data 
})

try:
    with open('../../assets/animimg002.png','rb') as f:
        anim002_data = f.read()
except:
    print("Could not find animimg002.png")
    sys.exit()
    
anim_imgs[1] = lv.img_dsc_t({
  'data_size': len(anim002_data),
  'data': anim002_data 
})

try:
    with open('../../assets/animimg003.png','rb') as f:
        anim003_data = f.read()
except:
    print("Could not find animimg003.png")
    sys.exit()
    
anim_imgs[2] = lv.img_dsc_t({
  'data_size': len(anim003_data),
  'data': anim003_data 
})

animimg0 = lv.animimg(lv.scr_act())
animimg0.center()
animimg0.set_src(anim_imgs, 3)
animimg0.set_duration(1000)
animimg0.set_repeat_count(lv.ANIM_REPEAT.INFINITE)
animimg0.start()

API¶

Typedefs

typedef uint8_t lv_animimg_part_t¶

Enums

enum [anonymous]¶

Values:

enumerator LV_ANIM_IMG_PART_MAIN¶

Functions

lv_obj_t *lv_animimg_create(lv_obj_t *parent)¶

Create an animation image objects

Parameters: parent -- pointer to an object, it will be the parent of the new button
Returns: pointer to the created animation image object

void lv_animimg_set_src(lv_obj_t *img, lv_img_dsc_t *dsc[], uint8_t num)¶

Set the image animation images source.

Parameters

img -- pointer to an animation image object
dsc -- pointer to a series images
num -- images' number

void lv_animimg_start(lv_obj_t *obj)¶

Startup the image animation.

Parameters: obj -- pointer to an animation image object

void lv_animimg_set_duration(lv_obj_t *img, uint32_t duration)¶

Set the image animation duration time. unit:ms

Parameters: img -- pointer to an animation image object

void lv_animimg_set_repeat_count(lv_obj_t *img, uint16_t count)¶

Set the image animation reapeatly play times.

Parameters

img -- pointer to an animation image object
count -- the number of times to repeat the animation

Variables

const lv_obj_class_t lv_animimg_class¶

struct lv_animimg_t¶

Public Members

lv_img_t img¶

lv_anim_t anim¶

lv_img_dsc_t **dsc¶

int8_t pic_count¶