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+/*
+ *  UI Gadget
+ *
+ * Copyright (c) 2000 - 2012 Samsung Electronics Co., Ltd. All rights reserved.
+ *
+ * Contact: Jayoun Lee <airjany@samsung.com>, Jinwoo Nam <jwoo.nam@samsung.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef __UI_GADGET_ENGINE_H__
+#define __UI_GADGET_ENGINE_H__
+
+/**
+ * @defgroup	UI_Gadget_For_Developer Developer API Reference Guide
+ * @ingroup	UI_Gadget
+ * @brief	A engine to develop a UI gadget. Callees (UI gadgets) uses this engines and APIs. (callee -> caller)
+ *
+ * @section Header To Use Them:
+ * @code
+ * #include <ui-gadget-engine.h>
+ * @endcode
+ */
+
+/**
+ * @addtogroup UI_Gadget_For_Developer
+ * @{
+ */
+
+#include <bundle.h>
+#include "ui-gadget.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * UI gadget engine operation type
+ * @see @ref lifecycle_sec
+ */
+struct ug_engine_ops {
+	/** create operation */
+	void *(*create)(void *win, ui_gadget_h ug, void(*show_end_cb)(void *data));
+	/** destroy operation */
+	void (*destroy)(ui_gadget_h ug, ui_gadget_h fv_top, void(*hide_end_cb)(ui_gadget_h ug));
+	/** reserved operations */
+	void *reserved[4];
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+/**
+ * @}
+ */
+
+#endif /* __UI_GADGET_ENGINE_H__ */