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c4_Sequence Class Reference

#include <mk4.h>

Inheritance diagram for c4_Sequence:

[legend]

List of all members.

Detailed Description

A sequence is an abstract base class for views on ranges of records.

Definition at line 846 of file mk4.h.


Public Member Functions
virtual int	AddHandler (c4_Handler *)=0
void	Attach (c4_Sequence *)
c4_Bytes &	Buffer ()
	c4_Sequence ()
virtual int	Compare (int, c4_Cursor) const
virtual c4_Handler *	CreateHandler (const c4_Property &)=0
void	DecRef ()
virtual const char *	Description ()
void	Detach (c4_Sequence *)
virtual bool	Get (int, int, c4_Bytes &)
c4_Dependencies *	GetDependencies () const
virtual const c4_Sequence *	HandlerContext (int) const =0
void	IncRef ()
virtual void	InsertAt (int, c4_Cursor, int=1)
virtual int	ItemSize (int, int)
virtual void	Move (int, int)
virtual c4_Handler &	NthHandler (int) const =0
int	NthPropId (int) const
virtual int	NumHandlers () const =0
int	NumRefs () const
virtual int	NumRows () const =0
virtual c4_Persist *	Persist () const
virtual void	PostChange (c4_Notifier &)
virtual c4_Notifier *	PreChange (c4_Notifier &)
int	PropIndex (const c4_Property &)
int	PropIndex (int)
virtual int	RemapIndex (int, const c4_Sequence *) const
virtual void	RemoveAt (int, int=1)
void	Resize (int, int=-1)
virtual bool	RestrictSearch (c4_Cursor, int &, int &)
virtual void	Set (int, const c4_Property &, const c4_Bytes &)
void	SetAt (int, c4_Cursor)
virtual void	SetNumRows (int)=0
const char *	UseTempBuffer (const char *)
Protected Member Functions
void	ClearCache ()
virtual	~c4_Sequence ()
Protected Attributes
int	_propertyLimit
short *	_propertyMap
c4_Bytes *	_tempBuf

Constructor & Destructor Documentation

c4_Sequence::c4_Sequence ( )

Abstract constructor.

Definition at line 16 of file viewx.cpp.

c4_Sequence::~c4_Sequence ( ) [protected, virtual]

Definition at line 19 of file viewx.cpp.

Member Function Documentation

virtual int c4_Sequence::AddHandler ( c4_Handler * ) [pure virtual]

Add the specified data handler to this sequence.

Implemented in c4_HandlerSeq, and c4_DerivedSeq.

void c4_Sequence::Attach ( c4_Sequence * child_ )

Definition at line 344 of file viewx.cpp.

c4_Bytes & c4_Sequence::Buffer ( )

Gives access to a general purpose temporary buffer.

Definition at line 128 of file viewx.cpp.

void c4_Sequence::ClearCache ( ) [protected]

Definition at line 241 of file viewx.cpp.

int c4_Sequence::Compare	(	int	index_,
		c4_Cursor	cursor_
	)			const `[virtual]`

Compare the specified row with another one.

Definition at line 54 of file viewx.cpp.

virtual c4_Handler* c4_Sequence::CreateHandler ( const c4_Property & ) [pure virtual]

Create a handler of the appropriate type.

Implemented in c4_HandlerSeq, and c4_DerivedSeq.

void c4_Sequence::DecRef ( )

Decrement the reference count, delete objects when last.

Definition at line 41 of file viewx.cpp.

const char * c4_Sequence::Description ( ) [virtual]

Reimplemented in c4_HandlerSeq.

Definition at line 305 of file viewx.cpp.

void c4_Sequence::Detach ( c4_Sequence * child_ )

Unregister a sequence which received change notifications.

Definition at line 354 of file viewx.cpp.

bool c4_Sequence::Get	(	int	index_,
		int	propId_,
		c4_Bytes &	buf_
	)			`[virtual]`

Retrieve one data item from this sequence.

Definition at line 314 of file viewx.cpp.

c4_Dependencies* c4_Sequence::GetDependencies ( ) const

Return a pointer to the dependencies, or null.

virtual const c4_Sequence* c4_Sequence::HandlerContext ( int ) const [pure virtual]

Return the context of the N-th handler in this sequence.

Implemented in c4_HandlerSeq, and c4_DerivedSeq.

void c4_Sequence::IncRef ( )

Increment the reference count of this sequence.

Definition at line 34 of file viewx.cpp.

void c4_Sequence::InsertAt	(	int	index_,
		c4_Cursor	newElem_,
		int	count_ = `1`
	)			`[virtual]`

Insert one or more rows into this sequence.

Reimplemented in c4_CustomSeq.

Definition at line 155 of file viewx.cpp.

int c4_Sequence::ItemSize	(	int	index_,
		int	propId_
	)			`[virtual]`

Return width of specified data item.

Definition at line 309 of file viewx.cpp.

void c4_Sequence::Move	(	int	from_,
		int	to_
	)			`[virtual]`

Move a row to another position.

careful, this does no index remapping, wrong for derived seq's

Reimplemented in c4_CustomSeq.

Definition at line 226 of file viewx.cpp.

virtual c4_Handler& c4_Sequence::NthHandler ( int ) const [pure virtual]

Return a reference to the N-th handler in this sequence.

Implemented in c4_HandlerSeq, and c4_DerivedSeq.

int c4_Sequence::NthPropId ( int index_ ) const

Return the id of the N-th property.

Definition at line 237 of file viewx.cpp.

virtual int c4_Sequence::NumHandlers ( ) const [pure virtual]

Return the number of data handlers in this sequence.

Implemented in c4_HandlerSeq, and c4_DerivedSeq.

int c4_Sequence::NumRefs ( ) const

Return the current reference count.

Definition at line 49 of file viewx.cpp.

virtual int c4_Sequence::NumRows ( ) const [pure virtual]

Return the current number of rows.

Implemented in c4_CustomSeq, c4_HandlerSeq, and c4_DerivedSeq.

c4_Persist * c4_Sequence::Persist ( ) const [virtual]

Reimplemented in c4_HandlerSeq.

Definition at line 29 of file viewx.cpp.

void c4_Sequence::PostChange ( c4_Notifier & ) [virtual]

Called after changes have been made to the sequence.

Definition at line 372 of file viewx.cpp.

c4_Notifier * c4_Sequence::PreChange ( c4_Notifier & ) [virtual]

Called just before a change is made to the sequence.

Reimplemented in c4_DerivedSeq.

Definition at line 366 of file viewx.cpp.

int c4_Sequence::PropIndex ( const c4_Property & prop_ )

Find the index of a property, or create a new entry.

Definition at line 285 of file viewx.cpp.

int c4_Sequence::PropIndex ( int propId_ )

Find the index of a property by its id.

CACHING NOTE: derived views will fail if underlying view is restructured

Definition at line 249 of file viewx.cpp.

int c4_Sequence::RemapIndex	(	int	index_,
		const c4_Sequence *	seq_
	)			const `[virtual]`

Remap the index to an underlying view.

Reimplemented in c4_DerivedSeq.

Definition at line 123 of file viewx.cpp.

void c4_Sequence::RemoveAt	(	int	index_,
		int	count_ = `1`
	)			`[virtual]`

Remove one or more rows from this sequence.

careful, this does no index remapping, wrong for derived seq's

Reimplemented in c4_CustomSeq.

Definition at line 213 of file viewx.cpp.

void c4_Sequence::Resize	(	int	newSize_,
		int	= `-1`
	)

Change number of rows, either by inserting or removing them.

Definition at line 140 of file viewx.cpp.

bool c4_Sequence::RestrictSearch	(	c4_Cursor	,
		int &	,
		int &
	)			`[virtual]`

Restrict the search range for rows.

Reimplemented in c4_CustomSeq.

Definition at line 77 of file viewx.cpp.

void c4_Sequence::Set	(	int	index_,
		const c4_Property &	prop_,
		const c4_Bytes &	buf_
	)			`[virtual]`

Store a data item into this sequence.

Definition at line 323 of file viewx.cpp.

void c4_Sequence::SetAt	(	int	index_,
		c4_Cursor	newElem_
	)

Replace the contents of a specified row.

Definition at line 82 of file viewx.cpp.

virtual void c4_Sequence::SetNumRows ( int ) [pure virtual]

for c4_Table::Sequence setup

Implemented in c4_HandlerSeq, and c4_DerivedSeq.

const char * c4_Sequence::UseTempBuffer ( const char * str_ )

Definition at line 135 of file viewx.cpp.

Member Data Documentation

int c4_Sequence::_propertyLimit [protected]

Optimization: cached property index.

Definition at line 855 of file mk4.h.

short* c4_Sequence::_propertyMap [protected]

Optimization: property map for faster access.

Definition at line 857 of file mk4.h.

c4_Bytes* c4_Sequence::_tempBuf [protected]

allocated on first use by c4_Sequence::Buffer()

Definition at line 859 of file mk4.h.

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

akregator

c4_Sequence Class Reference

Detailed Description

Public Member Functions

Protected Member Functions

Protected Attributes

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

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