109 lines
2.6 KiB
C++
109 lines
2.6 KiB
C++
/******************************************************************************
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* QSkinny - Copyright (C) The authors
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* SPDX-License-Identifier: BSD-3-Clause
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*****************************************************************************/
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#ifndef QSK_LAYOUT_CHAIN_H
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#define QSK_LAYOUT_CHAIN_H
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#include <QskLayoutMetrics.h>
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#include <qrect.h>
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#include <qvector.h>
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class QDebug;
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class QskLayoutChain
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{
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public:
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class Segment
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{
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public:
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inline qreal end() const { return start + length; }
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qreal start = 0.0;
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qreal length = 0.0;
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};
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typedef QVector< Segment > Segments;
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class CellData
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{
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public:
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inline qreal metric( int which ) const
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{
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return metrics.metric( which );
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}
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inline void setMetric( int which, qreal size )
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{
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metrics.setMetric( which, size );
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}
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int stretch = 0;
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bool canGrow = false;
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bool isShrunk = false;
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bool isValid = false;
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QskLayoutMetrics metrics;
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};
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enum FillMode : quint8
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{
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Leading = 1 << 0,
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Trailing = 1 << 1
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};
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QskLayoutChain();
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~QskLayoutChain();
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void invalidate();
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void reset( int count, qreal constraint );
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void expandCell( int index, const CellData& );
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void expandCells( int start, int end, const CellData& );
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void shrinkCell( int index, const CellData& );
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void finish();
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const CellData& cell( int index ) const { return m_cells[ index ]; }
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bool setSpacing( qreal spacing );
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qreal spacing() const { return m_spacing; }
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void setFillMode( int mode ) { m_fillMode = mode; }
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int fillMode() const { return m_fillMode; }
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Segments segments( qreal size ) const;
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QskLayoutMetrics boundingMetrics() const { return m_boundingMetrics; }
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inline qreal constraint() const { return m_constraint; }
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inline int count() const { return m_cells.size(); }
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private:
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Segments distributed( int which, qreal offset, qreal extra ) const;
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Segments minimumExpanded( qreal size ) const;
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Segments preferredStretched( qreal size ) const;
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QskLayoutMetrics m_boundingMetrics;
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qreal m_constraint = -2.0;
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qreal m_spacing = 0;
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int m_fillMode = 0;
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int m_sumStretches = 0;
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int m_validCells = 0;
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QVector< CellData > m_cells;
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};
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#ifndef QT_NO_DEBUG_STREAM
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QDebug operator<<( QDebug, const QskLayoutChain::Segment& );
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QDebug operator<<( QDebug, const QskLayoutChain::CellData& );
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#endif
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Q_DECLARE_TYPEINFO( QskLayoutChain::Segment, Q_MOVABLE_TYPE );
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Q_DECLARE_TYPEINFO( QskLayoutChain::CellData, Q_MOVABLE_TYPE );
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#endif
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