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Diffstat (limited to 'basegfx/inc/basegfx/range/basicbox.hxx')
-rw-r--r-- | basegfx/inc/basegfx/range/basicbox.hxx | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/basegfx/inc/basegfx/range/basicbox.hxx b/basegfx/inc/basegfx/range/basicbox.hxx new file mode 100644 index 000000000000..0a5274bc9bc9 --- /dev/null +++ b/basegfx/inc/basegfx/range/basicbox.hxx @@ -0,0 +1,136 @@ +/************************************************************************* + * + * 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 _BGFX_RANGE_BASICBOX_HXX +#define _BGFX_RANGE_BASICBOX_HXX + +#include <basegfx/range/basicrange.hxx> + + +namespace basegfx +{ + /** Specialization of BasicRange, handling the inside predicates + differently. + + This template considers the rightmost and bottommost border as + <em>outside</em> of the range, in contrast to BasicRange, + which considers them inside. + */ + class BasicBox : public BasicRange< sal_Int32, Int32Traits > + { + typedef BasicRange< sal_Int32, Int32Traits > Base; + public: + BasicBox() : + Base() + { + } + + BasicBox( sal_Int32 nValue ) : + Base( nValue ) + { + } + + BasicBox(const BasicBox& rBox) : + Base( rBox ) + { + } + + double getCenter() const + { + if(isEmpty()) + { + return 0.0; + } + else + { + return ((mnMaximum + mnMinimum - 1.0) / 2.0); + } + } + + using Base::isInside; + + bool isInside(sal_Int32 nValue) const + { + if(isEmpty()) + { + return false; + } + else + { + return (nValue >= mnMinimum) && (nValue < mnMaximum); + } + } + + using Base::overlaps; + + bool overlaps(const BasicBox& rBox) const + { + if(isEmpty()) + { + return false; + } + else + { + if(rBox.isEmpty()) + { + return false; + } + else + { + return !((rBox.mnMaximum <= mnMinimum) || (rBox.mnMinimum >= mnMaximum)); + } + } + } + + void grow(sal_Int32 nValue) + { + if(!isEmpty()) + { + bool bLessThanZero(nValue < 0); + + if(nValue > 0 || bLessThanZero) + { + mnMinimum -= nValue; + mnMaximum += nValue; + + if(bLessThanZero) + { + // test if range did collapse + if(mnMinimum > mnMaximum) + { + // if yes, collapse to center + mnMinimum = mnMaximum = ((mnMaximum + mnMinimum - 1) / 2); + } + } + } + } + } + }; + +} // end of namespace basegfx + +#endif /* _BGFX_RANGE_BASICBOX_HXX */ |