/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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* This file is part of the LibreOffice project .
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* License , v . 2 . 0 . If a copy of the MPL was not distributed with this
* file , You can obtain one at http : //mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice :
*
* Licensed to the Apache Software Foundation ( ASF ) under one or more
* contributor license agreements . See the NOTICE file distributed
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*/
#ifndef INCLUDED_SVX_IACCESSIBLEVIEWFORWARDER_HXX
#define INCLUDED_SVX_IACCESSIBLEVIEWFORWARDER_HXX
#include <tools/gen.hxx>
namespace accessibility
{
/** <p>This interface provides the means to transform between internal
coordinates in 100 th of mm and screen coordinates without giving direct
access to the underlying view . Each view forwarder represents a
specific real or virtual window . A call to
< method > GetVisibleArea < / method > returns the visible rectangle that
corresponds to this window . < / p >
< p > This interface is similar to the SvxViewForwarder but
differs in two important points : Firstly the < member > GetVisArea < / member >
method returns a rectangle in internal coordinates and secondly the
transformation methods do not require explicit mapmodes . These have to
be provided implicitly by the classes that implement this
interface . A third , less important , difference are the additional
transformation methods for sizes . The reasons for their existence are
convenience and improved performance . < / 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 separately .
*/
class IAccessibleViewForwarder
{
public :
IAccessibleViewForwarder() = default ;
IAccessibleViewForwarder(IAccessibleViewForwarder const &) = default ;
IAccessibleViewForwarder(IAccessibleViewForwarder&&) = default ;
IAccessibleViewForwarder& operator =(IAccessibleViewForwarder const &) = default ;
IAccessibleViewForwarder& operator =(IAccessibleViewForwarder&&) = default ;
virtual ~IAccessibleViewForwarder(){};
/** Returns the area of the underlying document that is visible in the
* corresponding window .
@ return
The rectangle of the visible part of the document . The values
are , contrary to the base class , in internal coordinates of
100 th of mm .
*/
virtual tools::Rectangle GetVisibleArea() const = 0 ;
/** Transform the specified point from internal coordinates in 100th of
mm to an absolute screen position .
@ param rPoint
Point in internal coordinates ( 100 th of mm ) .
@ 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 = 0 ;
/** Transform the specified size from internal coordinates in 100th of
mm to a screen oriented pixel size .
@ param rSize
Size in internal coordinates ( 100 th of mm ) .
@ return
The same size but in screen coordinates .
*/
virtual Size LogicToPixel(const Size& rSize) const = 0 ;
};
} // end of namespace accessibility
#endif
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