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/*************************************************************************
*
* 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 _SD_ACCESSIBILITY_ACCESSIBLE_VIEW_FORWARDER_HXX
#define _SD_ACCESSIBILITY_ACCESSIBLE_VIEW_FORWARDER_HXX
#include <svx/IAccessibleViewForwarder.hxx>
class SdrPaintView;
class OutputDevice;
namespace accessibility {
/** <p>This class provides the means to transform between internal coordinates
and screen coordinates without giving direct access to the underlying
view. It represents a certain window. A call to
<method>GetVisArea</method> returns the corresponding visible
rectangle.</p>
@attention
Note, that modifications of the underlying view that lead to
different transformations between internal and screen coordinates or
change the validity of the forwarder have to be signaled seperately.
*/
class AccessibleViewForwarder
: public IAccessibleViewForwarder
{
public:
//===== internal ========================================================
AccessibleViewForwarder (SdrPaintView* pView, USHORT nWindowId);
AccessibleViewForwarder (SdrPaintView* pView, OutputDevice& rDevice);
virtual ~AccessibleViewForwarder (void);
void SetView (SdrPaintView* pView);
//===== IAccessibleViewforwarder ========================================
/** This method informs you about the state of the forwarder. Do not
use it when the returned value is <false/>.
@return
Return <true/> if the view forwarder is valid and <false/> else.
*/
virtual BOOL IsValid (void) const;
/** Returns the area of the underlying document that is visible in the
* corresponding window.
@return
The rectangle of the visible part of the document.
*/
virtual Rectangle GetVisibleArea() const;
/** Transform the specified point from internal coordinates to an
absolute screen position.
@param rPoint
Point in internal coordinates.
@return
The same point but in screen coordinates relative to the upper
left corner of the (current) screen.
*/
virtual Point LogicToPixel (const Point& rPoint) const;
/** Transform the specified size from internal coordinates to a screen
* position.
@param rSize
Size in internal coordinates.
@return
The same size but in screen coordinates.
*/
virtual Size LogicToPixel (const Size& rSize) const;
/** Transform the specified point from absolute screen coordinates to
internal coordinates.
@param rPoint
Point in screen coordinates relative to the upper left corner of
the (current) screen.
@return
The same point but in internal coordinates.
*/
virtual Point PixelToLogic (const Point& rPoint) const;
/** Transform the specified Size from screen coordinates to internal
coordinates.
@param rSize
Size in screen coordinates.
@return
The same size but in internal coordinates.
*/
virtual Size PixelToLogic (const Size& rSize) const;
protected:
SdrPaintView* mpView;
USHORT mnWindowId;
OutputDevice& mrDevice;
private:
AccessibleViewForwarder (AccessibleViewForwarder&);
AccessibleViewForwarder& operator= (AccessibleViewForwarder&);
};
} // end of namespace accessibility
#endif
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