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/**************************************************************
*
* 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 _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, OutputDevice& rDevice);
virtual ~AccessibleViewForwarder (void);
//===== 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 sal_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;
sal_uInt16 mnWindowId;
OutputDevice& mrDevice;
private:
AccessibleViewForwarder (AccessibleViewForwarder&);
AccessibleViewForwarder& operator= (AccessibleViewForwarder&);
};
} // end of namespace accessibility
#endif
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