/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org 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 version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#ifndef _DIBPREVIEW_HXX_
#define _DIBPREVIEW_HXX_

//------------------------------------------------------------------------
// includes
//------------------------------------------------------------------------

#include "previewbase.hxx"
#include <osl/mutex.hxx>

#if defined _MSC_VER
#pragma warning(push, 1)
#endif
#include <windows.h>
#if defined _MSC_VER
#pragma warning(pop)
#endif

//---------------------------------------------
// A very simple wrapper for a window that does
// display DIBs.
// Maybe it would be better and more extensible
// to create another class that is responsible
// for rendering a specific image format into
// the area of the window, but for our purpose
// it's enough to go the simple way - KISS.
//---------------------------------------------

class CDIBPreview : public PreviewBase
{
public:
	
	// ctor
	CDIBPreview(HINSTANCE instance,HWND parent,sal_Bool bShowWindow = sal_False);

    // dtor
	virtual ~CDIBPreview( );

	// preview interface implementation

    virtual sal_Int32 SAL_CALL getTargetColorDepth() 
		throw (::com::sun::star::uno::RuntimeException);

    virtual sal_Int32 SAL_CALL getAvailableWidth() 
		throw (::com::sun::star::uno::RuntimeException);

    virtual sal_Int32 SAL_CALL getAvailableHeight() 
		throw (::com::sun::star::uno::RuntimeException);

    virtual void SAL_CALL setImage(sal_Int16 aImageFormat, const ::com::sun::star::uno::Any& aImage) 
		throw (::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException);

    virtual sal_Bool SAL_CALL setShowState(sal_Bool bShowState)
		throw (::com::sun::star::uno::RuntimeException);

    virtual sal_Bool SAL_CALL getShowState()
		throw (::com::sun::star::uno::RuntimeException);		

	virtual HWND SAL_CALL getWindowHandle() const;

private:
	virtual void SAL_CALL onPaint( HWND hWnd, HDC hDC );

    ATOM SAL_CALL RegisterDibPreviewWindowClass( );
    void SAL_CALL UnregisterDibPreviewWindowClass( );

    static LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
	
private:    		
	HINSTANCE  m_Instance;
	HWND	   m_Hwnd;		
	com::sun::star::uno::Sequence<sal_Int8> m_Image;
	osl::Mutex	m_PaintLock;

    // the preview window class has to be registered only
    // once per process, so multiple instance of this class
    // share the registered window class
    static ATOM       s_ClassAtom;
    static osl::Mutex s_Mutex;
    static sal_Int32  s_RegisterDibPreviewWndCount;
    
// prevent copy and assignment
private:
    CDIBPreview(const CDIBPreview&);
    CDIBPreview& operator=(const CDIBPreview&);
};


#endif