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vtkCommunity2DLayoutStrategy Class Reference

a simple fast 2D graph layout that looks for a community array on it's input and strengthens edges within a community and weakens edges not within the community. More...

#include <vtkCommunity2DLayoutStrategy.h>

Inheritance diagram for vtkCommunity2DLayoutStrategy:
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Collaboration diagram for vtkCommunity2DLayoutStrategy:
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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.
 
vtkCommunity2DLayoutStrategyNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses.
 
void Initialize () override
 This strategy sets up some data structures for faster processing of each Layout() call.
 
void Layout () override
 This is the layout method where the graph that was set in SetGraph() is laid out.
 
int IsLayoutComplete () override
 I'm an iterative layout so this method lets the caller know if I'm done laying out the graph.
 
virtual void SetRandomSeed (int)
 Seed the random number generator used to jitter point positions.
 
virtual int GetRandomSeed ()
 Seed the random number generator used to jitter point positions.
 
virtual void SetMaxNumberOfIterations (int)
 Set/Get the maximum number of iterations to be used.
 
virtual int GetMaxNumberOfIterations ()
 Set/Get the maximum number of iterations to be used.
 
virtual void SetIterationsPerLayout (int)
 Set/Get the number of iterations per layout.
 
virtual int GetIterationsPerLayout ()
 Set/Get the number of iterations per layout.
 
virtual void SetInitialTemperature (float)
 Set the initial temperature.
 
virtual float GetInitialTemperature ()
 Set the initial temperature.
 
virtual void SetCoolDownRate (double)
 Set/Get the Cool-down rate.
 
virtual double GetCoolDownRate ()
 Set/Get the Cool-down rate.
 
virtual void SetRestDistance (float)
 Manually set the resting distance.
 
virtual float GetRestDistance ()
 Manually set the resting distance.
 
virtual char * GetCommunityArrayName ()
 Get/Set the community array name.
 
virtual void SetCommunityArrayName (const char *)
 Get/Set the community array name.
 
virtual void SetCommunityStrength (float)
 Set the community 'strength'.
 
virtual float GetCommunityStrength ()
 Set the community 'strength'.
 
- Public Member Functions inherited from vtkGraphLayoutStrategy
virtual vtkTypeBool IsA (const char *type)
 Return 1 if this class is the same type of (or a subclass of) the named class.
 
vtkGraphLayoutStrategyNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses.
 
virtual void SetGraph (vtkGraph *graph)
 Setting the graph for the layout strategy.
 
virtual void Initialize ()
 This method allows the layout strategy to do initialization of data structures or whatever else it might want to do.
 
virtual void Layout ()=0
 This is the layout method where the graph that was set in SetGraph() is laid out.
 
virtual int IsLayoutComplete ()
 If your concrete class is iterative than you should overload IsLayoutComplete() otherwise it simply returns 1 by default;.
 
virtual void SetWeightEdges (bool state)
 Whether to use edge weights in the layout or not.
 
virtual bool GetWeightEdges ()
 Whether to use edge weights in the layout or not.
 
virtual void SetEdgeWeightField (const char *field)
 Set/Get the field to use for the edge weights.
 
virtual char * GetEdgeWeightField ()
 Set/Get the field to use for the edge weights.
 
- Public Member Functions inherited from vtkObject
 vtkBaseTypeMacro (vtkObject, vtkObjectBase)
 
virtual void DebugOn ()
 Turn debugging output on.
 
virtual void DebugOff ()
 Turn debugging output off.
 
bool GetDebug ()
 Get the value of the debug flag.
 
void SetDebug (bool debugFlag)
 Set the value of the debug flag.
 
virtual void Modified ()
 Update the modification time for this object.
 
virtual vtkMTimeType GetMTime ()
 Return this object's modified time.
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses.
 
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)
 
vtkTypeBool InvokeEvent (unsigned long event)
 
vtkTypeBool InvokeEvent (const char *event)
 
std::string GetObjectDescription () const override
 The object description printed in messages and PrintSelf output.
 
unsigned long AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
unsigned long AddObserver (const char *event, vtkCommand *, float priority=0.0f)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
vtkCommandGetCommand (unsigned long tag)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
void RemoveObserver (vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
void RemoveObservers (unsigned long event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
void RemoveObservers (const char *event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
vtkTypeBool HasObserver (unsigned long event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
vtkTypeBool HasObserver (const char *event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object.
 
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.
 
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.
 
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.
 
vtkTypeBool InvokeEvent (unsigned long event, void *callData)
 This method invokes an event and return whether the event was aborted or not.
 
vtkTypeBool InvokeEvent (const char *event, void *callData)
 This method invokes an event and return whether the event was aborted or not.
 
virtual void SetObjectName (const std::string &objectName)
 Set/get the name of this object for reporting purposes.
 
virtual std::string GetObjectName () const
 Set/get the name of this object for reporting purposes.
 
- Public Member Functions inherited from vtkObjectBase
const char * GetClassName () const
 Return the class name as a string.
 
virtual std::string GetObjectDescription () const
 The object description printed in messages and PrintSelf output.
 
virtual vtkTypeBool IsA (const char *name)
 Return 1 if this class is the same type of (or a subclass of) the named class.
 
virtual vtkIdType GetNumberOfGenerationsFromBase (const char *name)
 Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
 
virtual void Delete ()
 Delete a VTK object.
 
virtual void FastDelete ()
 Delete a reference to this object.
 
void InitializeObjectBase ()
 
void Print (ostream &os)
 Print an object to an ostream.
 
void Register (vtkObjectBase *o)
 Increase the reference count (mark as used by another object).
 
virtual void UnRegister (vtkObjectBase *o)
 Decrease the reference count (release by another object).
 
int GetReferenceCount ()
 Return the current reference count of this object.
 
void SetReferenceCount (int)
 Sets the reference count.
 
bool GetIsInMemkind () const
 A local state flag that remembers whether this object lives in the normal or extended memory space.
 
virtual void PrintHeader (ostream &os, vtkIndent indent)
 Methods invoked by print to print information about the object including superclasses.
 
virtual void PrintTrailer (ostream &os, vtkIndent indent)
 Methods invoked by print to print information about the object including superclasses.
 
virtual bool UsesGarbageCollector () const
 Indicate whether the class uses vtkGarbageCollector or not.
 

Static Public Member Functions

static vtkCommunity2DLayoutStrategyNew ()
 
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkCommunity2DLayoutStrategySafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkGraphLayoutStrategy
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkGraphLayoutStrategySafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkObject
static vtkObjectNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
 
static void BreakOnError ()
 This method is called when vtkErrorMacro executes.
 
static void SetGlobalWarningDisplay (vtkTypeBool val)
 This is a global flag that controls whether any debug, warning or error messages are displayed.
 
static void GlobalWarningDisplayOn ()
 This is a global flag that controls whether any debug, warning or error messages are displayed.
 
static void GlobalWarningDisplayOff ()
 This is a global flag that controls whether any debug, warning or error messages are displayed.
 
static vtkTypeBool GetGlobalWarningDisplay ()
 This is a global flag that controls whether any debug, warning or error messages are displayed.
 
- 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.
 
static vtkIdType GetNumberOfGenerationsFromBaseType (const char *name)
 Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
 
static vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
 
static void SetMemkindDirectory (const char *directoryname)
 The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.
 
static bool GetUsingMemkind ()
 A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkCommunity2DLayoutStrategy ()
 
 ~vtkCommunity2DLayoutStrategy () override
 
- Protected Member Functions inherited from vtkGraphLayoutStrategy
virtual vtkObjectBaseNewInstanceInternal () const
 
 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.
 
void InternalReleaseFocus ()
 These methods allow a command to exclusively grab all events.
 
- Protected Member Functions inherited from vtkObjectBase
 vtkObjectBase ()
 
virtual ~vtkObjectBase ()
 
virtual void RegisterInternal (vtkObjectBase *, vtkTypeBool check)
 
virtual void UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)
 
virtual void ReportReferences (vtkGarbageCollector *)
 
virtual void ObjectFinalize ()
 
 vtkObjectBase (const vtkObjectBase &)
 
void operator= (const vtkObjectBase &)
 

Protected Attributes

int MaxNumberOfIterations
 
float InitialTemperature
 
float CoolDownRate
 
- Protected Attributes inherited from vtkGraphLayoutStrategy
vtkGraphGraph
 
char * EdgeWeightField
 
bool WeightEdges
 
- Protected Attributes inherited from vtkObject
bool Debug
 
vtkTimeStamp MTime
 
vtkSubjectHelper * SubjectHelper
 
std::string ObjectName
 
- Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t > ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 

Additional Inherited Members

- Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction GetCurrentMallocFunction ()
 
static vtkReallocingFunction GetCurrentReallocFunction ()
 
static vtkFreeingFunction GetCurrentFreeFunction ()
 
static vtkFreeingFunction GetAlternateFreeFunction ()
 

Detailed Description

a simple fast 2D graph layout that looks for a community array on it's input and strengthens edges within a community and weakens edges not within the community.

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:
Thanks to Godzilla for not eating my computer so that this class could be written.
Events:
vtkCommand::ProgressEvent

Definition at line 35 of file vtkCommunity2DLayoutStrategy.h.

Member Typedef Documentation

◆ Superclass

Definition at line 40 of file vtkCommunity2DLayoutStrategy.h.

Constructor & Destructor Documentation

◆ vtkCommunity2DLayoutStrategy()

vtkCommunity2DLayoutStrategy::vtkCommunity2DLayoutStrategy ( )
protected

◆ ~vtkCommunity2DLayoutStrategy()

vtkCommunity2DLayoutStrategy::~vtkCommunity2DLayoutStrategy ( )
overrideprotected

Member Function Documentation

◆ New()

static vtkCommunity2DLayoutStrategy * vtkCommunity2DLayoutStrategy::New ( )
static

◆ IsTypeOf()

static vtkTypeBool vtkCommunity2DLayoutStrategy::IsTypeOf ( const char *  type)
static

◆ IsA()

virtual vtkTypeBool vtkCommunity2DLayoutStrategy::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.

◆ SafeDownCast()

static vtkCommunity2DLayoutStrategy * vtkCommunity2DLayoutStrategy::SafeDownCast ( vtkObjectBase o)
static

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkCommunity2DLayoutStrategy::NewInstanceInternal ( ) const
protectedvirtual

Reimplemented from vtkGraphLayoutStrategy.

◆ NewInstance()

vtkCommunity2DLayoutStrategy * vtkCommunity2DLayoutStrategy::NewInstance ( ) const

◆ PrintSelf()

void vtkCommunity2DLayoutStrategy::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 vtkObjectBase.

◆ SetRandomSeed()

virtual void vtkCommunity2DLayoutStrategy::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.

◆ GetRandomSeed()

virtual int vtkCommunity2DLayoutStrategy::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.

◆ SetMaxNumberOfIterations()

virtual void vtkCommunity2DLayoutStrategy::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. :)

◆ GetMaxNumberOfIterations()

virtual int vtkCommunity2DLayoutStrategy::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. :)

◆ SetIterationsPerLayout()

virtual void vtkCommunity2DLayoutStrategy::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 :)

◆ GetIterationsPerLayout()

virtual int vtkCommunity2DLayoutStrategy::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 :)

◆ SetInitialTemperature()

virtual void vtkCommunity2DLayoutStrategy::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. :)

◆ GetInitialTemperature()

virtual float vtkCommunity2DLayoutStrategy::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. :)

◆ SetCoolDownRate()

virtual void vtkCommunity2DLayoutStrategy::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. :)

◆ GetCoolDownRate()

virtual double vtkCommunity2DLayoutStrategy::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. :)

◆ SetRestDistance()

virtual void vtkCommunity2DLayoutStrategy::SetRestDistance ( float  )
virtual

Manually set the resting distance.

Otherwise the distance is computed automatically.

◆ GetRestDistance()

virtual float vtkCommunity2DLayoutStrategy::GetRestDistance ( )
virtual

Manually set the resting distance.

Otherwise the distance is computed automatically.

◆ Initialize()

void vtkCommunity2DLayoutStrategy::Initialize ( )
overridevirtual

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

Reimplemented from vtkGraphLayoutStrategy.

◆ Layout()

void vtkCommunity2DLayoutStrategy::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.

◆ IsLayoutComplete()

int vtkCommunity2DLayoutStrategy::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 130 of file vtkCommunity2DLayoutStrategy.h.

◆ GetCommunityArrayName()

virtual char * vtkCommunity2DLayoutStrategy::GetCommunityArrayName ( )
virtual

Get/Set the community array name.

◆ SetCommunityArrayName()

virtual void vtkCommunity2DLayoutStrategy::SetCommunityArrayName ( const char *  )
virtual

Get/Set the community array name.

◆ SetCommunityStrength()

virtual void vtkCommunity2DLayoutStrategy::SetCommunityStrength ( float  )
virtual

Set the community 'strength'.

The default is '1' which means vertices in the same community will be placed close together, values closer to .1 (minimum) will mean a layout closer to traditional force directed.

◆ GetCommunityStrength()

virtual float vtkCommunity2DLayoutStrategy::GetCommunityStrength ( )
virtual

Set the community 'strength'.

The default is '1' which means vertices in the same community will be placed close together, values closer to .1 (minimum) will mean a layout closer to traditional force directed.

Member Data Documentation

◆ MaxNumberOfIterations

int vtkCommunity2DLayoutStrategy::MaxNumberOfIterations
protected

Definition at line 155 of file vtkCommunity2DLayoutStrategy.h.

◆ InitialTemperature

float vtkCommunity2DLayoutStrategy::InitialTemperature
protected

Definition at line 156 of file vtkCommunity2DLayoutStrategy.h.

◆ CoolDownRate

float vtkCommunity2DLayoutStrategy::CoolDownRate
protected

Definition at line 157 of file vtkCommunity2DLayoutStrategy.h.


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