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diff --git a/engines/pegasus/interface.h b/engines/pegasus/interface.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef PEGASUS_INTERFACE_H
+#define PEGASUS_INTERFACE_H
+
+#include "pegasus/hotspot.h"
+#include "pegasus/input.h"
+#include "pegasus/notification.h"
+#include "pegasus/surface.h"
+#include "pegasus/transition.h"
+#include "pegasus/items/inventorypicture.h"
+
+namespace Pegasus {
+
+class BiochipItem;
+class InventoryItem;
+
+class Interface : public InputHandler, public NotificationReceiver {
+public:
+	Interface();
+	virtual ~Interface();
+
+	void createInterface();
+
+	// Recalibration functions...
+	void calibrateCompass();
+	void calibrateEnergyBar();
+	void raiseInventoryDrawerSync();
+	void lowerInventoryDrawerSync();
+	void raiseBiochipDrawerSync();
+	void lowerBiochipDrawerSync();
+
+	void raiseInventoryDrawer(const bool doCallBacks = true);
+	void raiseBiochipDrawer(const bool doCallBacks = true);
+	void lowerInventoryDrawer(const bool doCallBacks = true);
+	void lowerBiochipDrawer(const bool doCallBacks = true);
+
+	void raiseInventoryDrawerForMessage();
+	void lowerInventoryDrawerForMessage();
+	bool isInventoryUp();
+	bool isInventoryDown();
+
+	InventoryResult addInventoryItem(InventoryItem *);
+	InventoryResult removeInventoryItem(InventoryItem *);
+	void removeAllItemsFromInventory();
+	InventoryItem *getCurrentInventoryItem();
+	void setCurrentInventoryItem(InventoryItem *);
+	void setCurrentInventoryItemID(ItemID);
+	InventoryResult addBiochip(BiochipItem *);
+	void removeAllItemsFromBiochips();
+	BiochipItem *getCurrentBiochip();
+	void setCurrentBiochip(BiochipItem *);
+	void setCurrentBiochipID(ItemID);
+
+	void setDate(const uint16);
+
+	void playEndMessage();
+
+	void throwAwayInterface();
+
+protected:
+	void validateBackground();
+	void validateDateMonitor();
+	void validateCompass();
+	void validateNotifications();
+	void validateAIArea();
+	void validateInventoryPanel();
+	void validateBiochipPanel();
+	void validateEnergyMonitor();
+
+	void throwAwayBackground();
+	void throwAwayDateMonitor();
+	void throwAwayCompass();
+	void throwAwayNotifications();
+	void throwAwayAIArea();
+	void throwAwayInventoryPanel();
+	void throwAwayBiochipPanel();
+	void throwAwayEnergyMonitor();
+
+	void receiveNotification(Notification *, const NotificationFlags);
+	void inventoryLidOpen(const bool doCallBacks);
+	void inventoryLidClosed();
+	void inventoryDrawerUp();
+	void inventoryDrawerDown(const bool doCallBacks);
+	void biochipLidOpen(const bool doCallBacks);
+	void biochipLidClosed();
+	void biochipDrawerUp();
+	void biochipDrawerDown(const bool doCallBacks);
+
+	Picture _background1;
+	Picture _background2;
+	Picture _background3;
+	Picture _background4;
+
+	Picture _datePicture;
+
+	InputHandler *_previousHandler;
+
+	Push _inventoryPush;
+	SpriteSequence _inventoryLid;
+	NotificationCallBack _inventoryPushCallBack;
+	NotificationCallBack _inventoryLidCallBack;
+	InventoryItemsPicture _inventoryPanel;
+	bool _inventoryUp, _inventoryRaised;
+
+	Push _biochipPush;
+	SpriteSequence _biochipLid;
+	NotificationCallBack _biochipPushCallBack;
+	NotificationCallBack _biochipLidCallBack;
+	BiochipPicture _biochipPanel;
+	bool _biochipUp, _biochipRaised;
+
+	Hotspot _currentItemSpot;
+	Hotspot _currentBiochipSpot;
+
+	Notification _interfaceNotification;
+
+	bool _playingEndMessage;
+};
+
+extern Interface *g_interface;
+
+} // End of namespace Pegasus
+
+#endif