DtViewportExtents Class Reference

Public Member Functions
	DtViewportExtents ()
	DtViewportExtents (const DtViewportExtents &v)
virtual	~DtViewportExtents ()
DtViewportExtents &	operator= (const DtViewportExtents &rhs)
virtual void	resetToGlobalView ()
	navigation
virtual void	zoomIn ()
virtual void	zoomOut ()
virtual void	panNorthwest ()
virtual void	panNorth ()
virtual void	panNortheast ()
virtual void	panEast ()
virtual void	panSoutheast ()
virtual void	panSouth ()
virtual void	panSouthwest ()
virtual void	panWest ()
virtual void	zoom (const DtPoint &center, const double &mag)
	navigation helper functions
virtual void	resize (const DtExtent &e)
virtual void	recenter (const DtPoint &center, bool clipToGlobal=true)
	If clipToGlobal is false, do not clip to the global extents.
virtual const DtExtent &	globalExtent () const
	extents
virtual void	setGlobalExtent (const DtExtent &e)
virtual const double &	globalAspectRatio () const
virtual const DtExtent &	localExtent () const
virtual void	setLocalExtent (const DtExtent &e)
virtual const double &	localAspectRatio () const
virtual const DtDisplaySize	windowSize () const
virtual void	setWindowSize (const DtDisplaySize &s)
virtual const double &	windowAspectRatio () const
virtual void	changeWindowSize (const DtDisplaySize &s, bool resetExtents=true)
virtual void	windowFromDatabase (DtDisplayPoint &xp, const DtPoint &gd, bool smartRound=false) const
	Converts the database coordinates in gd into screen coordinates and returns the result in xp.
virtual void	windowFromDatabase (QPointF &xp, const DtPoint &gd) const
virtual void	databaseFromWindow (DtPoint &gd, const DtDisplayPoint &xp) const
	Calls the other form of databaseFromWindow using xp.x() and xp.y()
virtual void	databaseFromWindow (DtPoint &gd, const QPointF &xp) const
	Calls the other form of databaseFromWindow using xp.x() and xp.y()
virtual void	databaseFromWindow (DtPoint &gd, const double &x, const double &y) const
	Converts the x,y window coordinates into database coordinates and returns the result in gd.
virtual const double &	uMin () const
	Used for contribution culling.
virtual void	setUMin (const double &min)
virtual const double &	uMax () const
virtual void	setUMax (const double &max)
virtual const double &	vMin () const
virtual void	setVMin (const double &min)
virtual const double &	vMax () const
virtual void	setVMax (const double &max)
virtual const double &	panStep () const
	navigation
virtual void	setPanStep (const double &step)
virtual const double &	minPanStep () const
virtual void	setMinPanStep (const double &step)
virtual const double &	maxPanStep () const
virtual void	setMaxPanStep (const double &step)
virtual const double &	zoomStep () const
virtual void	setZoomStep (const double &step)
virtual const double &	minZoomStep () const
virtual void	setMinZoomStep (const double &step)
virtual const double &	maxZoomStep () const
virtual void	setMaxZoomStep (const double &step)
virtual void	clearExtents ()
	Clears out internal variables to make sure extents will calculate to 0.
virtual DtPoint	center () const
	Returns local extent center.
virtual void	setKeepAspectRatios (bool b)
virtual void	setMinimumViewPercent (double g)
	Change this variable to allow the map to be zoomed in closer.
virtual double	minimumViewWidth () const
virtual double	minimumViewHeight () const
virtual void	zoomLevel (double &magX, double &magY) const
	Returns the ratio of local extends (2D) to global extents.
virtual void	zoomFromGlobal (const DtPoint &center, const double &magX, const double &magY)
	Given the magnification level, zoom in to the desired center point and screen size given the zoom size (0 to 1) along the X (width) and Y (height) dimensions.
virtual void	resizeToFitAspectRatio (double &width, double &height)
	Adjusts width and height to respect current aspect ratio.
virtual void	resizeToFitAspectRatio (DtExtent &extent)
virtual void	setFromCorners (const DtPoint &nw, const DtPoint &se)
	Given the north west (right, back, top) and south east (left, front, bottom) corners, zoom to that extent.
virtual bool	isValidWindowDisplayPointFromDatabase (DtPoint gd) const
	Returns true if the database point will result in a valid screen coordinate.

Static Public Member Functions
static const int	maxWindowX ()
static const int	maxWindowY ()
static const int	minWindowX ()
static const int	minWindowY ()

Static Public Attributes
static const int	MAX_WINDOW_X
	These constants describe the operating system's maximum addressable screen area.
static const int	MIN_WINDOW_X
static const int	MAX_WINDOW_Y
static const int	MIN_WINDOW_Y
static double	theDefaultAltitudeRange

Protected Member Functions
virtual void	recomputeTransforms ()
	transformation
virtual const double &	xMin () const
virtual void	setXMin (const double &min)
virtual const double &	xMax () const
virtual void	setXMax (const double &max)
virtual const double &	yMin () const
virtual void	setYMin (const double &min)
virtual const double &	yMax () const
virtual void	setYMax (const double &max)
virtual const double &	a () const
virtual void	setA (const double &a)
virtual const double &	b () const
virtual void	setB (const double &b)
virtual const double &	c () const
virtual void	setC (const double &c)
virtual const double &	d () const
virtual void	setD (const double &d)
virtual int	roundIt (double val) const

Protected Attributes
double	myPanStep
double	myMinPanStep
double	myMaxPanStep
double	myZoomStep
double	myMinZoomStep
double	myMaxZoomStep
DtDisplaySize	myWindowSize
	window coords
double	myWindowAspectRatio
DtExtent	myGlobalExtent
	database coords
double	myGlobalAspectRatio
DtExtent	myLocalExtent
double	myLocalAspectRatio
DtPoint	myCenter
double	myUMin
	See F&VD pg 212.
double	myUMax
double	myVMin
double	myVMax
double	myXMin
	See F&VD pg 212.
double	myXMax
double	myYMin
double	myYMax
double	myA
double	myB
double	myC
double	myD
bool	myKeepAspectRatios

Static Protected Attributes
static const double	theDefaultPanStep
static const double	theDefaultMinPanStep
static const double	theDefaultMaxPanStep
static const double	theDefaultZoomStep
static const double	theDefaultMinZoomStep
static const double	theDefaultMaxZoomStep
static double	gMinimumPercent

Constructor & Destructor Documentation

DtViewportExtents::DtViewportExtents

(

)

DtViewportExtents::DtViewportExtents

(

const DtViewportExtents &

v

)

virtual DtViewportExtents::~DtViewportExtents ( )

virtual

Member Function Documentation

DtViewportExtents& DtViewportExtents::operator=

(

const DtViewportExtents &

rhs

)

virtual void DtViewportExtents::resetToGlobalView ( )

virtual

navigation

virtual void DtViewportExtents::zoomIn ( )

virtual

virtual void DtViewportExtents::zoomOut ( )

virtual

virtual void DtViewportExtents::panNorthwest ( )

virtual

virtual void DtViewportExtents::panNorth ( )

virtual

virtual void DtViewportExtents::panNortheast ( )

virtual

virtual void DtViewportExtents::panEast ( )

virtual

virtual void DtViewportExtents::panSoutheast ( )

virtual

virtual void DtViewportExtents::panSouth ( )

virtual

virtual void DtViewportExtents::panSouthwest ( )

virtual

virtual void DtViewportExtents::panWest ( )

virtual

virtual void DtViewportExtents::zoom ( const DtPoint &  center, const double &  mag  )

virtual

navigation helper functions

virtual void DtViewportExtents::resize ( const DtExtent &  e )

virtual

virtual void DtViewportExtents::recenter ( const DtPoint &  center, bool  clipToGlobal = true  )

virtual

If clipToGlobal is false, do not clip to the global extents.

virtual const DtExtent& DtViewportExtents::globalExtent ( ) const

virtual

extents

virtual void DtViewportExtents::setGlobalExtent ( const DtExtent &  e )

virtual

virtual const double& DtViewportExtents::globalAspectRatio ( ) const

virtual

virtual const DtExtent& DtViewportExtents::localExtent ( ) const

virtual

virtual void DtViewportExtents::setLocalExtent ( const DtExtent &  e )

virtual

virtual const double& DtViewportExtents::localAspectRatio ( ) const

virtual

virtual const DtDisplaySize DtViewportExtents::windowSize ( ) const

virtual

virtual void DtViewportExtents::setWindowSize ( const DtDisplaySize &  s )

virtual

virtual const double& DtViewportExtents::windowAspectRatio ( ) const

virtual

virtual void DtViewportExtents::changeWindowSize ( const DtDisplaySize &  s, bool  resetExtents = true  )

virtual

virtual void DtViewportExtents::windowFromDatabase ( DtDisplayPoint &  xp, const DtPoint &  gd, bool  smartRound = false  ) const

virtual

Converts the database coordinates in gd into screen coordinates and returns the result in xp.

If smartRound is true will use ceil function if point decimal part is >= .5

virtual void DtViewportExtents::windowFromDatabase ( QPointF &  xp, const DtPoint &  gd  ) const

virtual

virtual void DtViewportExtents::databaseFromWindow ( DtPoint &  gd, const DtDisplayPoint &  xp  ) const

virtual

Calls the other form of databaseFromWindow using xp.x() and xp.y()

virtual void DtViewportExtents::databaseFromWindow ( DtPoint &  gd, const QPointF &  xp  ) const

virtual

Calls the other form of databaseFromWindow using xp.x() and xp.y()

virtual void DtViewportExtents::databaseFromWindow ( DtPoint &  gd, const double &  x, const double &  y  ) const

virtual

Converts the x,y window coordinates into database coordinates and returns the result in gd.

virtual const double& DtViewportExtents::uMin ( ) const

virtual

Used for contribution culling.

virtual void DtViewportExtents::setUMin ( const double &  min )

virtual

virtual const double& DtViewportExtents::uMax ( ) const

virtual

virtual void DtViewportExtents::setUMax ( const double &  max )

virtual

virtual const double& DtViewportExtents::vMin ( ) const

virtual

virtual void DtViewportExtents::setVMin ( const double &  min )

virtual

virtual const double& DtViewportExtents::vMax ( ) const

virtual

virtual void DtViewportExtents::setVMax ( const double &  max )

virtual

virtual const double& DtViewportExtents::panStep ( ) const

virtual

navigation

virtual void DtViewportExtents::setPanStep ( const double &  step )

virtual

virtual const double& DtViewportExtents::minPanStep ( ) const

virtual

virtual void DtViewportExtents::setMinPanStep ( const double &  step )

virtual

virtual const double& DtViewportExtents::maxPanStep ( ) const

virtual

virtual void DtViewportExtents::setMaxPanStep ( const double &  step )

virtual

virtual const double& DtViewportExtents::zoomStep ( ) const

virtual

virtual void DtViewportExtents::setZoomStep ( const double &  step )

virtual

virtual const double& DtViewportExtents::minZoomStep ( ) const

virtual

virtual void DtViewportExtents::setMinZoomStep ( const double &  step )

virtual

virtual const double& DtViewportExtents::maxZoomStep ( ) const

virtual

virtual void DtViewportExtents::setMaxZoomStep ( const double &  step )

virtual

virtual void DtViewportExtents::clearExtents ( )

virtual

Clears out internal variables to make sure extents will calculate to 0.

virtual DtPoint DtViewportExtents::center ( ) const

virtual

Returns local extent center.

virtual void DtViewportExtents::setKeepAspectRatios ( bool  b )

virtual

virtual void DtViewportExtents::setMinimumViewPercent ( double  g )

virtual

Change this variable to allow the map to be zoomed in closer.

This is how far the user can zoom in (width or height) as a percentage of the global extent.

virtual double DtViewportExtents::minimumViewWidth ( ) const

virtual

virtual double DtViewportExtents::minimumViewHeight ( ) const

virtual

virtual void DtViewportExtents::zoomLevel ( double &  magX, double &  magY  ) const

virtual

Returns the ratio of local extends (2D) to global extents.

virtual void DtViewportExtents::zoomFromGlobal ( const DtPoint &  center, const double &  magX, const double &  magY  )

virtual

Given the magnification level, zoom in to the desired center point and screen size given the zoom size (0 to 1) along the X (width) and Y (height) dimensions.

virtual void DtViewportExtents::resizeToFitAspectRatio ( double &  width, double &  height  )

virtual

Adjusts width and height to respect current aspect ratio.

virtual void DtViewportExtents::resizeToFitAspectRatio ( DtExtent &  extent )

virtual

virtual void DtViewportExtents::setFromCorners ( const DtPoint &  nw, const DtPoint &  se  )

virtual

Given the north west (right, back, top) and south east (left, front, bottom) corners, zoom to that extent.

virtual bool DtViewportExtents::isValidWindowDisplayPointFromDatabase ( DtPoint  gd ) const

virtual

Returns true if the database point will result in a valid screen coordinate.

virtual void DtViewportExtents::recomputeTransforms ( )

protectedvirtual

transformation

virtual const double& DtViewportExtents::xMin ( ) const

protectedvirtual

virtual void DtViewportExtents::setXMin ( const double &  min )

protectedvirtual

virtual const double& DtViewportExtents::xMax ( ) const

protectedvirtual

virtual void DtViewportExtents::setXMax ( const double &  max )

protectedvirtual

virtual const double& DtViewportExtents::yMin ( ) const

protectedvirtual

virtual void DtViewportExtents::setYMin ( const double &  min )

protectedvirtual

virtual const double& DtViewportExtents::yMax ( ) const

protectedvirtual

virtual void DtViewportExtents::setYMax ( const double &  max )

protectedvirtual

virtual const double& DtViewportExtents::a ( ) const

protectedvirtual

virtual void DtViewportExtents::setA ( const double &  a )

protectedvirtual

virtual const double& DtViewportExtents::b ( ) const

protectedvirtual

virtual void DtViewportExtents::setB ( const double &  b )

protectedvirtual

virtual const double& DtViewportExtents::c ( ) const

protectedvirtual

virtual void DtViewportExtents::setC ( const double &  c )

protectedvirtual

virtual const double& DtViewportExtents::d ( ) const

protectedvirtual

virtual void DtViewportExtents::setD ( const double &  d )

protectedvirtual

virtual int DtViewportExtents::roundIt ( double  val ) const

protectedvirtual

static const int DtViewportExtents::maxWindowX ( )

static

static const int DtViewportExtents::maxWindowY ( )

static

static const int DtViewportExtents::minWindowX ( )

static

static const int DtViewportExtents::minWindowY ( )

static

Member Data Documentation

const double DtViewportExtents::theDefaultPanStep

staticprotected

const double DtViewportExtents::theDefaultMinPanStep

staticprotected

const double DtViewportExtents::theDefaultMaxPanStep

staticprotected

const double DtViewportExtents::theDefaultZoomStep

staticprotected

const double DtViewportExtents::theDefaultMinZoomStep

staticprotected

const double DtViewportExtents::theDefaultMaxZoomStep

staticprotected

const int DtViewportExtents::MAX_WINDOW_X

static

These constants describe the operating system's maximum addressable screen area.

const int DtViewportExtents::MIN_WINDOW_X

static

const int DtViewportExtents::MAX_WINDOW_Y

static

const int DtViewportExtents::MIN_WINDOW_Y

static

double DtViewportExtents::theDefaultAltitudeRange

static

double DtViewportExtents::myPanStep

protected

double DtViewportExtents::myMinPanStep

protected

double DtViewportExtents::myMaxPanStep

protected

double DtViewportExtents::myZoomStep

protected

double DtViewportExtents::myMinZoomStep

protected

double DtViewportExtents::myMaxZoomStep

protected

DtDisplaySize DtViewportExtents::myWindowSize

protected

window coords

double DtViewportExtents::myWindowAspectRatio

protected

DtExtent DtViewportExtents::myGlobalExtent

protected

database coords

double DtViewportExtents::myGlobalAspectRatio

protected

DtExtent DtViewportExtents::myLocalExtent

protected

double DtViewportExtents::myLocalAspectRatio

protected

DtPoint DtViewportExtents::myCenter

protected

double DtViewportExtents::myUMin

protected

See F&VD pg 212.

double DtViewportExtents::myUMax

protected

double DtViewportExtents::myVMin

protected

double DtViewportExtents::myVMax

protected

double DtViewportExtents::myXMin

protected

See F&VD pg 212.

double DtViewportExtents::myXMax

protected

double DtViewportExtents::myYMin

protected

double DtViewportExtents::myYMax

protected

double DtViewportExtents::myA

protected

double DtViewportExtents::myB

protected

double DtViewportExtents::myC

protected

double DtViewportExtents::myD

protected

bool DtViewportExtents::myKeepAspectRatios

protected

double DtViewportExtents::gMinimumPercent

staticprotected

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

• include/drawerNative/viewportExtents.h