/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 _TWAIN_HXX
#define _TWAIN_HXX

#include <vos/module.hxx>
#include <vcl/bitmap.hxx>
#include "twain/twain.h"


// -----------
// - Defines -
// -----------

#define TWAIN_SELECT			0x00000001UL
#define TWAIN_ACQUIRE			0x00000002UL
#define TWAIN_TERMINATE			0xFFFFFFFFUL

#define TWAIN_EVENT_NONE		0x00000000UL
#define TWAIN_EVENT_QUIT		0x00000001UL
#define TWAIN_EVENT_SCANNING	0x00000002UL
#define TWAIN_EVENT_XFER		0x00000004UL

// ------------
// - ImpTwain -
// ------------

class ImpTwain
{
	TW_IDENTITY					aAppIdent;
	TW_IDENTITY					aSrcIdent;
	Link						aNotifyLink;
	Bitmap						aBitmap;
	DSMENTRYPROC				pDSM;
	vos:: OModule *	pMod;
	sal_uLong						nCurState;

	void						ImplCreate();
	void						ImplOpenSourceManager();
	void						ImplOpenSource();
	sal_Bool						ImplEnableSource();
	void						ImplXfer();
	void						ImplFallback( sal_uLong nEvent );

								DECL_LINK( ImplFallbackHdl, void* );
								DECL_LINK( ImplDestroyHdl, void* );

public:

	sal_Bool						ImplHandleMsg( void* pMsg );

#ifdef OS2
	HAB							hAB;
	HWND						hTwainWnd;
	long						hTwainHook;
#else
	HWND						hTwainWnd;
	HHOOK						hTwainHook;
#endif

public:

								ImpTwain( const Link& rNotifyLink );
								~ImpTwain();

	void						Destroy();

	sal_Bool						SelectSource();
	sal_Bool						InitXfer();
	Bitmap						GetXferBitmap();
};

#endif // _TWAIN_HXX