init Files

libraries/lvgl/examples/others/snapshot/index.rst

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+Simple snapshot example
+-----------------------
+
+.. lv_example:: others/snapshot/lv_example_snapshot_1
+  :language: c
+
+

libraries/lvgl/examples/others/snapshot/lv_example_snapshot.h

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+/**
+ * @file lv_example_snapshot.h
+ *
+ */
+
+#ifndef LV_EX_SNAPSHOT_H
+#define LV_EX_SNAPSHOT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+void lv_example_snapshot_1(void);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LV_EX_GET_STARTED_H*/

libraries/lvgl/examples/others/snapshot/lv_example_snapshot_1.c

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+#include "../../lv_examples.h"
+#if LV_USE_SNAPSHOT && LV_BUILD_EXAMPLES
+
+static void event_cb(lv_event_t * e)
+{
+    lv_obj_t * snapshot_obj = lv_event_get_user_data(e);
+    lv_obj_t * img = lv_event_get_target(e);
+
+    if(snapshot_obj) {
+        lv_draw_buf_t * snapshot = (lv_draw_buf_t *)lv_image_get_src(snapshot_obj);
+        if(snapshot) {
+            lv_draw_buf_destroy(snapshot);
+        }
+
+        /*Update the snapshot, we know parent of object is the container.*/
+        snapshot = lv_snapshot_take(lv_obj_get_parent(img), LV_COLOR_FORMAT_ARGB8888);
+        if(snapshot == NULL)
+            return;
+        lv_image_set_src(snapshot_obj, snapshot);
+    }
+}
+
+void lv_example_snapshot_1(void)
+{
+    LV_IMAGE_DECLARE(img_star);
+    lv_obj_t * root = lv_screen_active();
+    lv_obj_set_style_bg_color(root, lv_palette_main(LV_PALETTE_LIGHT_BLUE), 0);
+
+    /*Create an image object to show snapshot*/
+    lv_obj_t * snapshot_obj = lv_image_create(root);
+    lv_obj_set_style_bg_color(snapshot_obj, lv_palette_main(LV_PALETTE_PURPLE), 0);
+    lv_obj_set_style_bg_opa(snapshot_obj, LV_OPA_100, 0);
+    lv_image_set_scale(snapshot_obj, 128);
+    lv_image_set_rotation(snapshot_obj, 300);
+
+    /*Create the container and its children*/
+    lv_obj_t * container = lv_obj_create(root);
+
+    lv_obj_center(container);
+    lv_obj_set_size(container, 180, 180);
+    lv_obj_set_flex_flow(container, LV_FLEX_FLOW_ROW_WRAP);
+    lv_obj_set_flex_align(container, LV_FLEX_ALIGN_SPACE_EVENLY, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
+    lv_obj_set_style_radius(container, 50, 0);
+    lv_obj_t * img;
+    int i;
+    for(i = 0; i < 4; i++) {
+        img = lv_image_create(container);
+        lv_image_set_src(img, &img_star);
+        lv_obj_set_style_bg_color(img, lv_color_black(), 0);
+        lv_obj_set_style_bg_opa(img, LV_OPA_COVER, 0);
+        //        lv_obj_set_style_transform_scale(img, 400, LV_STATE_PRESSED);
+        lv_obj_add_flag(img, LV_OBJ_FLAG_CLICKABLE);
+        lv_obj_add_event_cb(img, event_cb, LV_EVENT_PRESSED, snapshot_obj);
+        lv_obj_add_event_cb(img, event_cb, LV_EVENT_RELEASED, snapshot_obj);
+    }
+}
+
+#endif