FlatView::ZoomMgr Class Reference

Manages zoom factors. Will always provide a new zoom when forward() called, using fwdFac(). For back, will stop at initial. More...

Classes
struct	ViewerZoomData

Public Types
typedef Geom::Size2D< double >	Size
typedef Geom::Point2D< double >	Point

Public Member Functions
	ZoomMgr ()
	~ZoomMgr ()
void	setNrViewers (int)
void	init (const Geom::PosRectangle< double > &)
void	reInit (const Geom::PosRectangle< double > &)
	Will try to keep as many zooms as possible. More...
void	init (const TypeSet< Geom::PosRectangle< double > > &)
void	reInit (const TypeSet< Geom::PosRectangle< double > > &)
void	add (Size, int vieweridx=0)
Size	current (int vieweridx=0) const
Size	back (int vieweridx, bool onlyvertical, bool usefwdfac) const
Size	forward (int vieweridx, bool onlyvertical, bool usefwdfac) const
bool	atStart (int vieweridx=-1) const
void	toStart (int vieweridx=-1) const
int	nrZooms (int vieweridx=0) const
Size	initialSize (int vieweridx=0) const
Point	initialCenter (int vieweridx=0) const
double	fwdFac () const
void	setFwdFac (double fac)

Protected Attributes
TypeSet< int >	current_
ObjectSet< ViewerZoomData >	viewerdata_
double	fwdfac_

Detailed Description

Manages zoom factors. Will always provide a new zoom when forward() called, using fwdFac(). For back, will stop at initial.

Member Typedef Documentation

typedef Geom::Point2D<double> FlatView::ZoomMgr::Point

typedef Geom::Size2D<double> FlatView::ZoomMgr::Size

Constructor & Destructor Documentation

FlatView::ZoomMgr::ZoomMgr

(

)

FlatView::ZoomMgr::~ZoomMgr

(

)

Member Function Documentation

void FlatView::ZoomMgr::add	(	Size	,
		int	vieweridx = 0
	)

Will put this Size at the right place and makes it current. Also removes zooms larger than this one.

bool FlatView::ZoomMgr::atStart

(

int

vieweridx = -1

)

const

If vieweridx is not specified, returns true only if all viewers are at start.

Size FlatView::ZoomMgr::back	(	int	vieweridx,
		bool	onlyvertical,
		bool	usefwdfac
	)		const

Never past initial zoom.

Parameters

onlyvertical	if true, only the height of current size is multiplied by 1/fwdfac_ to get new size.
usefwdfac	if true, multiplies current size by 1/fwdfac_ to get new size. Else returns previous size.

Size FlatView::ZoomMgr::current

(

int

vieweridx = 0

)

const

Size FlatView::ZoomMgr::forward	(	int	vieweridx,
		bool	onlyvertical,
		bool	usefwdfac
	)		const

Goes on and on.

Parameters

onlyvertical	if true, only the height of current size is multiplied by fwdfac_ to get new size.
usefwdfac	if true, or if there is no zoom larger than this one, multiplies current size by fwdfac_ to get new size.

double FlatView::ZoomMgr::fwdFac ( ) const

inline

void FlatView::ZoomMgr::init

(

const Geom::PosRectangle< double > &

)

void FlatView::ZoomMgr::init

(

const TypeSet< Geom::PosRectangle< double > > &

)

Point FlatView::ZoomMgr::initialCenter

(

int

vieweridx = 0

)

const

Size FlatView::ZoomMgr::initialSize

(

int

vieweridx = 0

)

const

int FlatView::ZoomMgr::nrZooms

(

int

vieweridx = 0

)

const

void FlatView::ZoomMgr::reInit

(

const Geom::PosRectangle< double > &

)

Will try to keep as many zooms as possible.

void FlatView::ZoomMgr::reInit

(

const TypeSet< Geom::PosRectangle< double > > &

)

void FlatView::ZoomMgr::setFwdFac

(

double

fac

)

fwdfac_ should be greater than zero and less than one.

void FlatView::ZoomMgr::setNrViewers

(

int

)

void FlatView::ZoomMgr::toStart

(

int

vieweridx = -1

)

const

If vieweridx is not specified, all viewers will be back to initial zoom.

Member Data Documentation

TypeSet<int> FlatView::ZoomMgr::current_

mutableprotected

double FlatView::ZoomMgr::fwdfac_

protected

ObjectSet<ViewerZoomData> FlatView::ZoomMgr::viewerdata_

protected