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80 lines
2.5 KiB
80 lines
2.5 KiB
15 years ago
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/***************************************************************************
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zoominterface.h - description
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-------------------
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begin : Fri Sep 12 2003
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copyright : (C) 2003 by Friedrich W. H. Kossebau
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email : Friedrich.W.H@Kossebau.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License version 2 as published by the Free Software Foundation. *
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* *
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***************************************************************************/
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#ifndef ZOOMINTERFACE_H
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#define ZOOMINTERFACE_H
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namespace KHE
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{
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/**
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* @short A simple interface for zooming
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*
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* This interface enables abstract linear zooming.
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* It operates in sizes of font point size.
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*
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* @author Friedrich W. H. Kossebau <Friedrich.W.H@Kossebau.de>
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* @see createBytesEditWidget(), zoomInterface()
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* @since 3.2
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*/
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class ZoomInterface
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{
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public:
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/** enlarges the display
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* @param PointInc increment to the display size (in font point size)
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*/
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virtual void zoomIn( int PointInc ) = 0;
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/** increases the display size by an arbitrary value, usually 1 font point
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* @see zoomOut()
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*/
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virtual void zoomIn() = 0;
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/** makes the display smaller
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* @param PointDec decrement to the display size (in font point size)
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*/
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virtual void zoomOut( int PointDec ) = 0;
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/** decreases the display size by an arbitrary value, usually 1 font point
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* @see zoomIn()
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*/
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virtual void zoomOut() = 0;
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/** sets the display size
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* @param PointSize new display size (in font point size)
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*/
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virtual void zoomTo( int PointSize ) = 0;
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/** resets the display to the default size */
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virtual void unZoom() = 0;
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};
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/** tries to get the zoom interface of t
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* @return a pointer to the interface, otherwise 0
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* @author Friedrich W. H. Kossebau <Friedrich.W.H@Kossebau.de>
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* @since 3.2
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*/
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template<class T>
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ZoomInterface *zoomInterface( T *t )
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{
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if( !t )
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return 0;
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return static_cast<ZoomInterface*>( t->qt_cast("KHE::ZoomInterface") );
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}
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}
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#endif
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