71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
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/******************************************************************************
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* QSkinny - Copyright (C) 2016 Uwe Rathmann
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* This file may be used under the terms of the QSkinny License, Version 1.0
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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 <QskLayoutHint.h>
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#include <qvector.h>
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#include <vector>
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class QskLayoutChain
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{
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public:
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class Range
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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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class Cell
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{
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public:
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QskLayoutHint hint;
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int stretch = 0;
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bool canGrow = false;
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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 addCell( int index, const Cell& );
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void finish();
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bool setSpacing( qreal spacing );
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qreal spacing() const { return m_spacing; }
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void setExtraSpacingAt( Qt::Edges edges ) { m_extraSpacingAt = edges; }
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QVector< Range > geometries( qreal size ) const;
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QskLayoutHint boundingHint() const { return m_boundingHint; }
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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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Q_DISABLE_COPY( QskLayoutChain )
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QVector< Range > distributed( int which, qreal offset, qreal extra ) const;
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QVector< Range > minimumExpanded( qreal size ) const;
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QVector< Range > preferredStretched( qreal size ) const;
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QskLayoutHint m_boundingHint;
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qreal m_constraint = -2;
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qreal m_spacing = 0;
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Qt::Edges m_extraSpacingAt;
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int m_sumStretches = 0;
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std::vector< Cell > m_cells;
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};
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#endif
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