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Diffstat (limited to 'vcl/inc/vcl/regband.hxx')
| -rw-r--r-- | vcl/inc/vcl/regband.hxx | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/vcl/inc/vcl/regband.hxx b/vcl/inc/vcl/regband.hxx new file mode 100644 index 000000000000..2e34fdcd5677 --- /dev/null +++ b/vcl/inc/vcl/regband.hxx @@ -0,0 +1,150 @@ +/************************************************************************* + * + * 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 _SV_REGBAND_HXX +#define _SV_REGBAND_HXX + +#include <vcl/sv.h> +#include <tools/poly.hxx> + +/* ======================================================================= + +class ImplRegionBand + +This class handles one y-band of the region. In this band may contain one +or more seprarations in x-direction. The y-Band do not contain any +separation after creation. + +The separations are modified with basic clipping functions like Union and +Intersection - the Class will process the clipping for the actual band. + +The actual separations may be checked by functions like IsInside or +IsOver. + +======================================================================= */ + +// ------------------------ +// - ImplRegionBand-Types - +// ------------------------ + +// element for the list with x-separations +struct ImplRegionBandSep +{ + ImplRegionBandSep* mpNextSep; + long mnXLeft; + long mnXRight; + BOOL mbRemoved; +}; + +enum LineType { LINE_ASCENDING, LINE_DESCENDING, LINE_HORIZONTAL }; + +// element for the list with x-separations +struct ImplRegionBandPoint +{ + ImplRegionBandPoint* mpNextBandPoint; + long mnX; + long mnLineId; + BOOL mbEndPoint; + LineType meLineType; +}; + +// ------------------ +// - ImplRegionBand - +// ------------------ + +class ImplRegionBand +{ +public: + ImplRegionBand* mpNextBand; // pointer to the next element of the list + ImplRegionBand* mpPrevBand; // pointer to the previous element of the list (only used temporaery) + ImplRegionBandSep* mpFirstSep; // root of the list with x-separations + ImplRegionBandPoint* mpFirstBandPoint; // root of the list with lines + long mnYTop; // actual boundary of the band + long mnYBottom; + BOOL mbTouched; + + // create y-band with boundaries + ImplRegionBand( long nYTop, long nYBottom ); + /** copy y-band with with all data + @param theSourceBand + The new ImplRegionBand object will + be a copy of this band. + @param bIgnorePoints + When <TRUE/> (the default) the + band points pointed to by + mpFirstBandPoint are not copied. + When <FALSE/> they are copied. + You need the points when you are + planning to call ProcessPoints() + later on. + */ + ImplRegionBand( const ImplRegionBand & theSourceBand, + const bool bIgnorePoints = true); + ~ImplRegionBand(); + + long GetXLeftBoundary() const; + long GetXRightBoundary() const; + + // combine overlapping bands + BOOL OptimizeBand(); + + // generate separations from lines and process + // union with existing separations + void ProcessPoints(); + // insert point in the list for later processing + BOOL InsertPoint( long nX, long nLineID, + BOOL bEndPoint, LineType eLineType ); + + void Union( long nXLeft, long nXRight ); + void Intersect( long nXLeft, long nXRight ); + void Exclude( long nXLeft, long nXRight ); + void XOr( long nXLeft, long nXRight ); + + void MoveX( long nHorzMove ); + void ScaleX( double fHorzScale ); + + BOOL IsInside( long nX ); + BOOL IsInside( long nLeft, long nRight ); + BOOL IsOver( long nLeft, long nRight ); + + BOOL IsEmpty() const { return ((!mpFirstSep) && (!mpFirstBandPoint)); } + + BOOL operator==( const ImplRegionBand& rRegionBand ) const; + + /** Split the called band at the given vertical coordinate. After the + split the called band will cover the upper part not including nY. + The new band will cover the lower part including nY. + @param nY + The band is split at this y coordinate. The new, lower band + will include this very value. + @return + Returns the new, lower band. + */ + ImplRegionBand* SplitBand (const sal_Int32 nY); +}; + +#endif // _SV_REGBAND_HXX |