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-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
-/*
- * This file is part of the LibreOffice project.
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * 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
- * 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 .
- */
-
-#ifndef _SVX_ACCESSIBILITY_IACCESSIBLE_VIEW_FORWARDER_HXX
-#define _SVX_ACCESSIBILITY_IACCESSIBLE_VIEW_FORWARDER_HXX
-
-#include <sal/types.h>
-#include <tools/gen.hxx>
-
-
-namespace accessibility {
-
-
-
-/** <p>This interface provides the means to transform between internal
- coordinates in 100th 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 <type>SvxViewForwarder</type> 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 implicitely by the classes that implement this
- interface. A third, less important, difference are the additional
- transfomation methods for sizes. The reasons for their existince 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 seperately.
-*/
-class IAccessibleViewForwarder
-{
-public:
- virtual ~IAccessibleViewForwarder (void){};
-
- /** 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 sal_Bool IsValid (void) const = 0;
-
- /** 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
- 100th of mm.
- */
- virtual 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 (100th 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 (100th of mm).
-
- @return
- The same size but in screen coordinates.
- */
- virtual Size LogicToPixel (const Size& rSize) const = 0;
-
- /** Transform the specified point from absolute screen coordinates to
- internal coordinates (100th of mm).
-
- @param rPoint
- Point in screen coordinates relative to the upper left corner of
- the (current) screen.
-
- @return
- The same point but in internal coordinates (100th of mm).
- */
- virtual Point PixelToLogic (const Point& rPoint) const = 0;
-
- /** Transform the specified size from screen coordinates to internal
- coordinates (100th of mm).
-
- @param rSize
- Size in screen coordinates.
-
- @return
- The same size but in internal coordinates (100th of mm).
- */
- virtual Size PixelToLogic (const Size& rSize) const = 0;
-};
-
-} // end of namespace accessibility
-
-#endif
-
-/* vim:set shiftwidth=4 softtabstop=4 expandtab: */