127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_BASEGFX_RANGE_BASICBOX_HXX
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#define INCLUDED_BASEGFX_RANGE_BASICBOX_HXX
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#include <basegfx/range/basicrange.hxx>
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#include <basegfx/basegfxdllapi.h>
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namespace basegfx
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{
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/** Explicitely different from BasicRange, handling the inside predicates
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differently.
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This is modelled after how polygon fill algorithms set pixel -
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typically excluding rightmost and bottommost ones.
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*/
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class BasicBox : public BasicRange< sal_Int32, Int32Traits >
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{
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typedef BasicRange< sal_Int32, Int32Traits > Base;
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public:
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BasicBox() {}
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explicit BasicBox( sal_Int32 nValue ) :
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Base( nValue )
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{
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}
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bool isEmpty() const
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{
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return mnMinimum >= mnMaximum;
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}
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double getCenter() const
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{
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if(isEmpty())
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{
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return 0.0;
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}
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else
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{
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return ((mnMaximum + mnMinimum - 1.0) / 2.0);
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}
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}
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using Base::isInside;
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bool isInside(sal_Int32 nValue) const
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{
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if(isEmpty())
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{
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return false;
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}
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else
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{
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return (nValue >= mnMinimum) && (nValue < mnMaximum);
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}
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}
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using Base::overlaps;
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bool overlaps(const BasicBox& rBox) const
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{
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if(isEmpty())
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{
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return false;
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}
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else
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{
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if(rBox.isEmpty())
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{
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return false;
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}
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else
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{
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return !((rBox.mnMaximum <= mnMinimum) || (rBox.mnMinimum >= mnMaximum));
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}
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}
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}
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void grow(sal_Int32 nValue)
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{
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if(!isEmpty())
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{
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bool bLessThanZero(nValue < 0);
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if(nValue > 0 || bLessThanZero)
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{
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mnMinimum -= nValue;
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mnMaximum += nValue;
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if(bLessThanZero)
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{
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// test if range did collapse
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if(mnMinimum > mnMaximum)
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{
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// if yes, collapse to center
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mnMinimum = mnMaximum = ((mnMaximum + mnMinimum - 1) / 2);
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}
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}
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}
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}
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}
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};
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} // end of namespace basegfx
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#endif // INCLUDED_BASEGFX_RANGE_BASICBOX_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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