init Files

libraries/lvgl/examples/widgets/image/lv_example_image_3.c

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+#include "../../lv_examples.h"
+#if LV_USE_IMAGE && LV_BUILD_EXAMPLES
+
+static void set_angle(void * img, int32_t v)
+{
+    lv_image_set_rotation(img, v);
+}
+
+static void set_scale(void * img, int32_t v)
+{
+    lv_image_set_scale(img, v);
+}
+
+/**
+ * Show transformations (zoom and rotation) using a pivot point.
+ */
+void lv_example_image_3(void)
+{
+    LV_IMAGE_DECLARE(img_cogwheel_argb);
+
+    /*Now create the actual image*/
+    lv_obj_t * img = lv_image_create(lv_screen_active());
+    lv_image_set_src(img, &img_cogwheel_argb);
+    lv_obj_align(img, LV_ALIGN_CENTER, 50, 50);
+    lv_image_set_pivot(img, 0, 0);    /*Rotate around the top left corner*/
+
+    lv_anim_t a;
+    lv_anim_init(&a);
+    lv_anim_set_var(&a, img);
+    lv_anim_set_exec_cb(&a, set_angle);
+    lv_anim_set_values(&a, 0, 3600);
+    lv_anim_set_duration(&a, 5000);
+    lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE);
+    lv_anim_start(&a);
+
+    lv_anim_set_exec_cb(&a, set_scale);
+    lv_anim_set_values(&a, 128, 256);
+    lv_anim_set_playback_duration(&a, 3000);
+    lv_anim_start(&a);
+}
+
+#endif