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131 lines
4.2 KiB
C++
131 lines
4.2 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-9 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online at www.gnu.org/licenses.
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.rawmaterialsoftware.com/juce for more information.
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==============================================================================
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*/
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#include "../../../core/juce_StandardHeader.h"
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BEGIN_JUCE_NAMESPACE
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#include "juce_StretchableObjectResizer.h"
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//==============================================================================
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StretchableObjectResizer::StretchableObjectResizer()
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{
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}
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StretchableObjectResizer::~StretchableObjectResizer()
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{
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}
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void StretchableObjectResizer::addItem (const double size,
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const double minSize, const double maxSize,
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const int order)
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{
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jassert (order >= 0 && order < INT_MAX); // the order must be >= 0 and less than INT_MAX
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Item* const item = new Item();
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item->size = size;
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item->minSize = minSize;
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item->maxSize = maxSize;
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item->order = order;
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items.add (item);
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}
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double StretchableObjectResizer::getItemSize (const int index) const throw()
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{
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const Item* const it = items [index];
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return it != 0 ? it->size : 0;
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}
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void StretchableObjectResizer::resizeToFit (const double targetSize)
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{
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int order = 0;
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for (;;)
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{
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double currentSize = 0;
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double minSize = 0;
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double maxSize = 0;
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int nextHighestOrder = INT_MAX;
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for (int i = 0; i < items.size(); ++i)
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{
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const Item* const it = items.getUnchecked(i);
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currentSize += it->size;
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if (it->order <= order)
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{
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minSize += it->minSize;
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maxSize += it->maxSize;
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}
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else
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{
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minSize += it->size;
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maxSize += it->size;
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nextHighestOrder = jmin (nextHighestOrder, it->order);
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}
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}
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const double thisIterationTarget = jlimit (minSize, maxSize, targetSize);
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if (thisIterationTarget >= currentSize)
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{
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const double availableExtraSpace = maxSize - currentSize;
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const double targetAmountOfExtraSpace = thisIterationTarget - currentSize;
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const double scale = targetAmountOfExtraSpace / availableExtraSpace;
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for (int i = 0; i < items.size(); ++i)
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{
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Item* const it = items.getUnchecked(i);
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if (it->order <= order)
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it->size = jmin (it->maxSize, it->size + (it->maxSize - it->size) * scale);
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}
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}
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else
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{
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const double amountOfSlack = currentSize - minSize;
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const double targetAmountOfSlack = thisIterationTarget - minSize;
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const double scale = targetAmountOfSlack / amountOfSlack;
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for (int i = 0; i < items.size(); ++i)
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{
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Item* const it = items.getUnchecked(i);
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if (it->order <= order)
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it->size = jmax (it->minSize, it->minSize + (it->size - it->minSize) * scale);
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}
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}
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if (nextHighestOrder < INT_MAX)
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order = nextHighestOrder;
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else
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break;
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}
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}
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END_JUCE_NAMESPACE
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