a simple fast 2D graph layout that looks for a 'constraint' array (vtkDoubleArray). More...

#include <vtkConstrained2DLayoutStrategy.h>

Inheritance diagram for vtkConstrained2DLayoutStrategy:

Collaboration diagram for vtkConstrained2DLayoutStrategy:

Public Types
typedef vtkGraphLayoutStrategy	Superclass

Public Types inherited from vtkGraphLayoutStrategy
typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class. More...

vtkConstrained2DLayoutStrategy *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses. More...

void	Initialize () override
	This strategy sets up some data structures for faster processing of each Layout() call. More...

void	Layout () override
	This is the layout method where the graph that was set in SetGraph() is laid out. More...

int	IsLayoutComplete () override
	I'm an iterative layout so this method lets the caller know if I'm done laying out the graph. More...


virtual void	SetRandomSeed (int)
	Seed the random number generator used to jitter point positions. More...

virtual int	GetRandomSeed ()
	Seed the random number generator used to jitter point positions. More...


virtual void	SetMaxNumberOfIterations (int)
	Set/Get the maximum number of iterations to be used. More...

virtual int	GetMaxNumberOfIterations ()
	Set/Get the maximum number of iterations to be used. More...


virtual void	SetIterationsPerLayout (int)
	Set/Get the number of iterations per layout. More...

virtual int	GetIterationsPerLayout ()
	Set/Get the number of iterations per layout. More...


virtual void	SetInitialTemperature (float)
	Set the initial temperature. More...

virtual float	GetInitialTemperature ()
	Set the initial temperature. More...


virtual void	SetCoolDownRate (double)
	Set/Get the Cool-down rate. More...

virtual double	GetCoolDownRate ()
	Set/Get the Cool-down rate. More...


virtual void	SetRestDistance (float)
	Manually set the resting distance. More...

virtual float	GetRestDistance ()
	Manually set the resting distance. More...


virtual void	SetInputArrayName (const char *)
	Set/Get the input constraint array name. More...

virtual char *	GetInputArrayName ()
	Set/Get the input constraint array name. More...

Public Member Functions inherited from vtkGraphLayoutStrategy
vtkGraphLayoutStrategy *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses. More...

virtual void	SetGraph (vtkGraph *graph)
	Setting the graph for the layout strategy. More...

virtual void	SetWeightEdges (bool state)
	Whether to use edge weights in the layout or not. More...

virtual bool	GetWeightEdges ()
	Whether to use edge weights in the layout or not. More...

virtual void	SetEdgeWeightField (const char *field)
	Set/Get the field to use for the edge weights. More...

virtual char *	GetEdgeWeightField ()
	Set/Get the field to use for the edge weights. More...

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on. More...

virtual void	DebugOff ()
	Turn debugging output off. More...

bool	GetDebug ()
	Get the value of the debug flag. More...

void	SetDebug (bool debugFlag)
	Set the value of the debug flag. More...

virtual void	Modified ()
	Update the modification time for this object. More...

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time. More...

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method. More...

int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not. More...

int	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not. More...

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string. More...

virtual void	Delete ()
	Delete a VTK object. More...

virtual void	FastDelete ()
	Delete a reference to this object. More...

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream. More...

virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object). More...

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object). More...

int	GetReferenceCount ()
	Return the current reference count of this object. More...

void	SetReferenceCount (int)
	Sets the reference count. More...

void	PrintRevisions (ostream &)
	Legacy. More...

virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses. More...

virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses. More...

Static Public Member Functions
static vtkConstrained2DLayoutStrategy *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkConstrained2DLayoutStrategy *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkGraphLayoutStrategy
static vtkTypeBool	IsTypeOf (const char *type)

static vtkGraphLayoutStrategy *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes. More...

static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static int	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class. More...

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkConstrained2DLayoutStrategy ()

	~vtkConstrained2DLayoutStrategy () override

Protected Member Functions inherited from vtkGraphLayoutStrategy
	vtkGraphLayoutStrategy ()

	~vtkGraphLayoutStrategy () override

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events. More...

void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events. More...

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
int	MaxNumberOfIterations

float	InitialTemperature

float	CoolDownRate

Protected Attributes inherited from vtkGraphLayoutStrategy
vtkGraph *	Graph

char *	EdgeWeightField

bool	WeightEdges

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Detailed Description

a simple fast 2D graph layout that looks for a 'constraint' array (vtkDoubleArray).

Any entry in the constraint array will indicate the level of impedance a node has to the force calculations during the layout optimization. The array is assumed to be normalized between zero and one, with one being totally constrained, so no force will be applied to the node (i.e. no movement), and zero being full range of movement (no constraints).

This class is a density grid based force directed layout strategy. Also please note that 'fast' is relative to quite slow. :) The layout running time is O(V+E) with an extremely high constant.

Thanks:: We would like to thank Mothra for distracting Godzilla while we wrote this class.

Definition at line 51 of file vtkConstrained2DLayoutStrategy.h.

Member Typedef Documentation

typedef vtkGraphLayoutStrategy vtkConstrained2DLayoutStrategy::Superclass

Definition at line 56 of file vtkConstrained2DLayoutStrategy.h.

Constructor & Destructor Documentation

vtkConstrained2DLayoutStrategy::vtkConstrained2DLayoutStrategy ( )

protected

vtkConstrained2DLayoutStrategy::~vtkConstrained2DLayoutStrategy ( )

overrideprotected

Member Function Documentation

static vtkConstrained2DLayoutStrategy* vtkConstrained2DLayoutStrategy::New ( )

static

static vtkTypeBool vtkConstrained2DLayoutStrategy::IsTypeOf ( const char * type )

static

virtual vtkTypeBool vtkConstrained2DLayoutStrategy::IsA ( const char * name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkGraphLayoutStrategy.

static vtkConstrained2DLayoutStrategy* vtkConstrained2DLayoutStrategy::SafeDownCast ( vtkObjectBase * o )

static

virtual vtkObjectBase* vtkConstrained2DLayoutStrategy::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkGraphLayoutStrategy.

vtkConstrained2DLayoutStrategy* vtkConstrained2DLayoutStrategy::NewInstance ( ) const

void vtkConstrained2DLayoutStrategy::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkObject.

virtual void vtkConstrained2DLayoutStrategy::SetRandomSeed ( int )

virtual

Seed the random number generator used to jitter point positions.

This has a significant effect on their final positions when the layout is complete.

virtual int vtkConstrained2DLayoutStrategy::GetRandomSeed ( )

virtual

Seed the random number generator used to jitter point positions.

This has a significant effect on their final positions when the layout is complete.

virtual void vtkConstrained2DLayoutStrategy::SetMaxNumberOfIterations ( int )

virtual

Set/Get the maximum number of iterations to be used.

The higher this number, the more iterations through the algorithm is possible, and thus, the more the graph gets modified. The default is '100' for no particular reason Note: The strong recommendation is that you do not change this parameter. :)

virtual int vtkConstrained2DLayoutStrategy::GetMaxNumberOfIterations ( )

virtual

Set/Get the maximum number of iterations to be used.

The higher this number, the more iterations through the algorithm is possible, and thus, the more the graph gets modified. The default is '100' for no particular reason Note: The strong recommendation is that you do not change this parameter. :)

virtual void vtkConstrained2DLayoutStrategy::SetIterationsPerLayout ( int )

virtual

Set/Get the number of iterations per layout.

The only use for this ivar is for the application to do visualizations of the layout before it's complete. The default is '100' to match the default 'MaxNumberOfIterations' Note: Changing this parameter is just fine :)

virtual int vtkConstrained2DLayoutStrategy::GetIterationsPerLayout ( )

virtual

Set/Get the number of iterations per layout.

The only use for this ivar is for the application to do visualizations of the layout before it's complete. The default is '100' to match the default 'MaxNumberOfIterations' Note: Changing this parameter is just fine :)

virtual void vtkConstrained2DLayoutStrategy::SetInitialTemperature ( float )

virtual

Set the initial temperature.

The temperature default is '5' for no particular reason Note: The strong recommendation is that you do not change this parameter. :)

virtual float vtkConstrained2DLayoutStrategy::GetInitialTemperature ( )

virtual

Set the initial temperature.

The temperature default is '5' for no particular reason Note: The strong recommendation is that you do not change this parameter. :)

virtual void vtkConstrained2DLayoutStrategy::SetCoolDownRate ( double )

virtual

Set/Get the Cool-down rate.

The higher this number is, the longer it will take to "cool-down", and thus, the more the graph will be modified. The default is '10' for no particular reason. Note: The strong recommendation is that you do not change this parameter. :)

virtual double vtkConstrained2DLayoutStrategy::GetCoolDownRate ( )

virtual

Set/Get the Cool-down rate.

The higher this number is, the longer it will take to "cool-down", and thus, the more the graph will be modified. The default is '10' for no particular reason. Note: The strong recommendation is that you do not change this parameter. :)

virtual void vtkConstrained2DLayoutStrategy::SetRestDistance ( float )

virtual

Manually set the resting distance.

Otherwise the distance is computed automatically.

virtual float vtkConstrained2DLayoutStrategy::GetRestDistance ( )

virtual

Manually set the resting distance.

Otherwise the distance is computed automatically.

void vtkConstrained2DLayoutStrategy::Initialize ( )

overridevirtual

This strategy sets up some data structures for faster processing of each Layout() call.

Reimplemented from vtkGraphLayoutStrategy.

void vtkConstrained2DLayoutStrategy::Layout ( )

overridevirtual

This is the layout method where the graph that was set in SetGraph() is laid out.

The method can either entirely layout the graph or iteratively lay out the graph. If you have an iterative layout please implement the IsLayoutComplete() method.

Implements vtkGraphLayoutStrategy.

int vtkConstrained2DLayoutStrategy::IsLayoutComplete ( )

inlineoverridevirtual

I'm an iterative layout so this method lets the caller know if I'm done laying out the graph.

Reimplemented from vtkGraphLayoutStrategy.

Definition at line 147 of file vtkConstrained2DLayoutStrategy.h.

virtual void vtkConstrained2DLayoutStrategy::SetInputArrayName ( const char * )

virtual

Set/Get the input constraint array name.

If no input array name is set then the name 'constraint' is used.

virtual char* vtkConstrained2DLayoutStrategy::GetInputArrayName ( )

virtual