1 #include "../../lv_examples.h"
2 #if LV_USE_SNAPSHOT && LV_BUILD_EXAMPLES
3
event_cb(lv_event_t * e)4 static void event_cb(lv_event_t * e)
5 {
6 lv_obj_t * snapshot_obj = lv_event_get_user_data(e);
7 lv_obj_t * img = lv_event_get_target(e);
8
9 if(snapshot_obj) {
10 lv_img_dsc_t * snapshot = (void *)lv_img_get_src(snapshot_obj);
11 if(snapshot) {
12 lv_snapshot_free(snapshot);
13 }
14
15 /*Update the snapshot, we know parent of object is the container.*/
16 snapshot = lv_snapshot_take(img->parent, LV_IMG_CF_TRUE_COLOR_ALPHA);
17 if(snapshot == NULL)
18 return;
19 lv_img_set_src(snapshot_obj, snapshot);
20 }
21 }
22
lv_example_snapshot_1(void)23 void lv_example_snapshot_1(void)
24 {
25 LV_IMG_DECLARE(img_star);
26 lv_obj_t * root = lv_scr_act();
27 lv_obj_set_style_bg_color(root, lv_palette_main(LV_PALETTE_LIGHT_BLUE), 0);
28
29 /*Create an image object to show snapshot*/
30 lv_obj_t * snapshot_obj = lv_img_create(root);
31 lv_obj_set_style_bg_color(snapshot_obj, lv_palette_main(LV_PALETTE_PURPLE), 0);
32 lv_obj_set_style_bg_opa(snapshot_obj, LV_OPA_100, 0);
33 lv_img_set_zoom(snapshot_obj, 128);
34 lv_img_set_angle(snapshot_obj, 300);
35
36 /*Create the container and its children*/
37 lv_obj_t * container = lv_obj_create(root);
38
39 lv_obj_center(container);
40 lv_obj_set_size(container, 180, 180);
41 lv_obj_set_flex_flow(container, LV_FLEX_FLOW_ROW_WRAP);
42 lv_obj_set_flex_align(container, LV_FLEX_ALIGN_SPACE_EVENLY, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
43 lv_obj_set_style_radius(container, 50, 0);
44 lv_obj_t * img;
45 int i;
46 for(i = 0; i < 4; i++) {
47 img = lv_img_create(container);
48 lv_img_set_src(img, &img_star);
49 lv_obj_set_style_bg_color(img, lv_color_black(), 0);
50 lv_obj_set_style_bg_opa(img, LV_OPA_COVER, 0);
51 lv_obj_set_style_transform_zoom(img, 400, LV_STATE_PRESSED);
52 lv_obj_add_flag(img, LV_OBJ_FLAG_CLICKABLE);
53 lv_obj_add_event_cb(img, event_cb, LV_EVENT_PRESSED, snapshot_obj);
54 lv_obj_add_event_cb(img, event_cb, LV_EVENT_RELEASED, snapshot_obj);
55 }
56 }
57
58 #endif
59
