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diff --git a/dggui/nativewindow.h b/dggui/nativewindow.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            nativewindow.h
+ *
+ *  Fri Dec 28 18:46:01 CET 2012
+ *  Copyright 2012 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#pragma once
+
+#include <string>
+#include <memory>
+#include <queue>
+#include <tuple>
+#include <vector>
+
+#include "guievent.h"
+
+namespace GUI
+{
+
+struct Point;
+
+//! Interface class for native window implementations.
+class NativeWindow
+{
+public:
+	NativeWindow() {}
+	virtual ~NativeWindow() {}
+
+	//! Set a fixed size to the window.
+	//! It resizes the window and disallows user resizing.
+	virtual void setFixedSize(std::size_t width, std::size_t height) = 0;
+
+	//! Force window to stay on top of other windows
+	virtual void setAlwaysOnTop(bool always_on_top) = 0;
+
+	//! Set a new size of the window.
+	virtual void resize(std::size_t width, std::size_t height) = 0;
+
+	//! Query size of the native window.
+	virtual std::pair<std::size_t, std::size_t> getSize() const = 0;
+
+	//! Move the window to a new position.
+	//! Note: negative value are allowed.
+	virtual void move(int x, int y) = 0;
+
+	//! Query the screen position of the native window.
+	//! Note: returned values can be negative.
+	virtual std::pair<int, int> getPosition() const = 0;
+
+	//! Show the window if it is hidden.
+	virtual void show() = 0;
+
+	//! Hides the window.
+	virtual void hide() = 0;
+
+	//! Return visibility state of the native window.
+	virtual bool visible() const = 0;
+
+	//! Sets the window caption in the title bar (if it has one).
+	virtual void setCaption(const std::string &caption) = 0;
+
+	//! Draw the internal rendering buffer to the window buffer.
+	virtual void redraw(const Rect& dirty_rect) = 0;
+
+	//! Toggle capture mouse mode.
+	virtual void grabMouse(bool grab) = 0;
+
+	//! Reads all currently enqueued events from the native window system.
+	//! \return A queue of shared pointers to events.
+	virtual EventQueue getEvents() = 0;
+
+	//! \returns the native window handle, it HWND on Win32 or Window id on X11
+	virtual void* getNativeWindowHandle() const = 0;
+
+	//! Translate a the local native window coordinate to a global screen
+	//! coordinate.
+	virtual Point translateToScreen(const Point& point) = 0;
+};
+
+} // GUI::