64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/******************************************************************************
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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_CONSTRAINT_H
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#define QSK_LAYOUT_CONSTRAINT_H
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#include "QskGlobal.h"
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#include <qnamespace.h>
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#include <limits>
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class QskSizePolicy;
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class QskControl;
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class QQuickItem;
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class QSizeF;
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class QRectF;
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namespace std { template< typename T > class function; }
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namespace QskLayoutConstraint
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{
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enum Type
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{
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Unconstrained = 0,
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WidthForHeight = 1 << 0,
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HeightForWidth = 1 << 1
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};
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QSK_EXPORT qreal heightForWidth( const QQuickItem*, qreal width );
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QSK_EXPORT qreal widthForHeight( const QQuickItem*, qreal height );
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QSK_EXPORT Type constraintType( const QQuickItem* );
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QSK_EXPORT qreal constrainedMetric(
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Type, const QskControl*, qreal value,
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std::function< qreal( Type, const QskControl*, qreal ) > );
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QSK_EXPORT qreal constrainedChildrenMetric( Type, const QskControl*, qreal width );
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QSK_EXPORT QSizeF effectiveConstraint( const QQuickItem*, Qt::SizeHint );
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QSK_EXPORT QskSizePolicy sizePolicy( const QQuickItem* );
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// bounded by Qt::MinimumSize/Qt::MaximumSize
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QSK_EXPORT QSizeF boundedSize( const QQuickItem*, const QSizeF& );
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QSK_EXPORT QSizeF adjustedSize( const QQuickItem*, const QSizeF& );
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QSK_EXPORT QSizeF sizeHint(
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const QQuickItem*, Qt::SizeHint, const QSizeF& constraint );
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QSK_EXPORT qreal sizeHint(
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const QQuickItem*, Qt::SizeHint, Qt::Orientation, qreal constraint );
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QSK_EXPORT QRectF itemRect(
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const QQuickItem*, const QRectF&, Qt::Alignment );
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// QGridLayoutEngine internally uses FLT_MAX
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const qreal unlimited = std::numeric_limits< float >::max();
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}
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#endif
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