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59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
#include "../../lv_examples.h"
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#if LV_USE_SNAPSHOT && LV_BUILD_EXAMPLES
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static void event_cb(lv_event_t * e)
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{
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lv_obj_t * snapshot_obj = lv_event_get_user_data(e);
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lv_obj_t * img = lv_event_get_target(e);
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if(snapshot_obj) {
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lv_img_dsc_t * snapshot = (void *)lv_img_get_src(snapshot_obj);
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if(snapshot) {
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lv_snapshot_free(snapshot);
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}
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/*Update the snapshot, we know parent of object is the container.*/
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snapshot = lv_snapshot_take(img->parent, LV_IMG_CF_TRUE_COLOR_ALPHA);
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if(snapshot == NULL)
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return;
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lv_img_set_src(snapshot_obj, snapshot);
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}
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}
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void lv_example_snapshot_1(void)
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{
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LV_IMG_DECLARE(img_star);
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lv_obj_t * root = lv_scr_act();
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lv_obj_set_style_bg_color(root, lv_palette_main(LV_PALETTE_LIGHT_BLUE), 0);
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/*Create an image object to show snapshot*/
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lv_obj_t * snapshot_obj = lv_img_create(root);
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lv_obj_set_style_bg_color(snapshot_obj, lv_palette_main(LV_PALETTE_PURPLE), 0);
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lv_obj_set_style_bg_opa(snapshot_obj, LV_OPA_100, 0);
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lv_img_set_zoom(snapshot_obj, 128);
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lv_img_set_angle(snapshot_obj, 300);
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/*Create the container and its children*/
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lv_obj_t * container = lv_obj_create(root);
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lv_obj_center(container);
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lv_obj_set_size(container, 180, 180);
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lv_obj_set_flex_flow(container, LV_FLEX_FLOW_ROW_WRAP);
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lv_obj_set_flex_align(container, LV_FLEX_ALIGN_SPACE_EVENLY, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
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lv_obj_set_style_radius(container, 50, 0);
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lv_obj_t * img;
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int i;
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for(i = 0; i < 4; i++) {
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img = lv_img_create(container);
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lv_img_set_src(img, &img_star);
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lv_obj_set_style_bg_color(img, lv_color_black(), 0);
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lv_obj_set_style_bg_opa(img, LV_OPA_COVER, 0);
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lv_obj_set_style_transform_zoom(img, 400, LV_STATE_PRESSED);
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lv_obj_add_flag(img, LV_OBJ_FLAG_CLICKABLE);
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lv_obj_add_event_cb(img, event_cb, LV_EVENT_PRESSED, snapshot_obj);
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lv_obj_add_event_cb(img, event_cb, LV_EVENT_RELEASED, snapshot_obj);
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}
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}
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#endif
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