QSpanCollection Class Reference

#include <qtableview_p.h>

Collaboration diagram for QSpanCollection:

Classes
struct	Span

Public Types
typedef std::list< Span * >	SpanList

Public Member Functions
	~QSpanCollection ()
void	addSpan (Span *span)
void	updateSpan (Span *span, int old_height)
Span *	spanAt (int x, int y) const
void	clear ()
QSet< Span * >	spansInRect (int x, int y, int w, int h) const
void	updateInsertedRows (int start, int end)
void	updateInsertedColumns (int start, int end)
void	updateRemovedRows (int start, int end)
void	updateRemovedColumns (int start, int end)

Public Attributes
SpanList	spans

Detailed Description

This is a list of span with a binary index to look up quickly a span at a certain index.

The index is a map of map. spans are mentaly divided into sub spans so that the start of any subspans doesn't overlap with any other subspans. There is no real representation of the subspans. The key of the first map is the row where the subspan starts, the value of the first map is a list (map) of all subspans that starts at the same row. It is indexed with its row

Definition at line 44 of file qtableview_p.h.

Member Typedef Documentation

SpanList

typedef std::list<Span *> QSpanCollection::SpanList

Definition at line 86 of file qtableview_p.h.

Constructor & Destructor Documentation

~QSpanCollection()

QSpanCollection::~QSpanCollection ( )

inline

Definition at line 66 of file qtableview_p.h.

References qDeleteAll().

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Member Function Documentation

addSpan()

QT_BEGIN_NAMESPACE void QSpanCollection::addSpan

(

QSpanCollection::Span *

span

)

Add a span to the collection. the collection takes the ownership.

Definition at line 33 of file qtableview.cpp.

References QMap< Key, T >::insert(), spans, and QMap< Key, T >::value().

Referenced by QTableViewPrivate::setSpan().

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clear()

void QSpanCollection::clear

(

)

remove and deletes all spans inside the collection

Definition at line 130 of file qtableview.cpp.

References qDeleteAll(), and spans.

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spanAt()

QSpanCollection::Span * QSpanCollection::spanAt	(	int	x,
		int	y
	)		const

Returns

a spans that spans over cell x,y (column,row) or \nullptr if there is none.

Definition at line 112 of file qtableview.cpp.

Referenced by QTableViewPrivate::heightHintForIndex(), QTableViewPrivate::setSpan(), QTableViewPrivate::span(), and QTableViewPrivate::widthHintForIndex().

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spansInRect()

QSet< QSpanCollection::Span * > QSpanCollection::spansInRect	(	int	x,
		int	y,
		int	w,
		int	h
	)		const

return a list to all the spans that spans over cells in the given rectangle

Definition at line 140 of file qtableview.cpp.

References QMap< Key, T >::const_iterator::key(), and list.

Referenced by QTableViewPrivate::drawAndClipSpans().

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updateInsertedColumns()

void QSpanCollection::updateInsertedColumns	(	int	start,
		int	end
	)

Updates the span collection after column insertion.

Definition at line 225 of file qtableview.cpp.

References QMap< Key, T >::begin(), QMap< Key, T >::end(), Qt::endl(), QMap< Key, T >::erase(), QMap< Key, T >::insert(), it, qDebug, spans, and QMap< Key, T >::value().

Referenced by QTableViewPrivate::_q_updateSpanInsertedColumns().

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updateInsertedRows()

void QSpanCollection::updateInsertedRows	(	int	start,
		int	end
	)

Updates the span collection after row insertion.

Definition at line 178 of file qtableview.cpp.

References Qt::endl(), qDebug, and spans.

Referenced by QTableViewPrivate::_q_updateSpanInsertedRows().

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updateRemovedColumns()

void QSpanCollection::updateRemovedColumns	(	int	start,
		int	end
	)

Updates the span collection after column removal.

Definition at line 432 of file qtableview.cpp.

References Qt::endl(), it, qDebug, qDeleteAll(), and spans.

Referenced by QTableViewPrivate::_q_updateSpanRemovedColumns().

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updateRemovedRows()

void QSpanCollection::updateRemovedRows	(	int	start,
		int	end
	)

Updates the span collection after row removal.

Definition at line 305 of file qtableview.cpp.

References QMap< Key, T >::begin(), QMap< Key, T >::clear(), QMap< Key, T >::end(), Qt::endl(), QMap< Key, T >::insert(), QSet< T >::insert(), it, qDebug, qDeleteAll(), spans, and QMap< Key, T >::value().

Referenced by QTableViewPrivate::_q_updateSpanRemovedRows().

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updateSpan()

void QSpanCollection::updateSpan	(	QSpanCollection::Span *	span,
		int	old_height
	)

Has to be called after the height and width of a span is changed.

old_height is the height before the change

if the size of the span is now 0x0 the span will be deleted.

Definition at line 71 of file qtableview.cpp.

References Q_ASSERT, Q_UNUSED, qMax(), and spans.

Referenced by QTableViewPrivate::setSpan().

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Member Data Documentation

spans

SpanList QSpanCollection::spans

Definition at line 87 of file qtableview_p.h.

Referenced by addSpan(), clear(), QTableViewPrivate::drawAndClipSpans(), QTableViewPrivate::hasSpans(), updateInsertedColumns(), updateInsertedRows(), updateRemovedColumns(), updateRemovedRows(), and updateSpan().

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The documentation for this class was generated from the following files:

• qtbase/src/widgets/itemviews/qtableview_p.h
• qtbase/src/widgets/itemviews/qtableview.cpp