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vtkSimple2DLayoutStrategy Class Reference

a simple 2D graph layout More...

#include <vtkSimple2DLayoutStrategy.h>

Inheritance diagram for vtkSimple2DLayoutStrategy:
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Collaboration diagram for vtkSimple2DLayoutStrategy:
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Public Types

typedef vtkGraphLayoutStrategy Superclass
 
- Public Types inherited from vtkGraphLayoutStrategy
typedef vtkObject Superclass
 

Public Member Functions

virtual int IsA (const char *type)
 Return 1 if this class is the same type of (or a subclass of) the named class. More...
 
vtkSimple2DLayoutStrategyNewInstance () 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 SetJitter (bool)
 Set Random jitter of the nodes at initialization to on or off. More...
 
virtual bool GetJitter ()
 Set Random jitter of the nodes at initialization to on or off. More...
 
virtual void SetRestDistance (float)
 Manually set the resting distance. More...
 
virtual float GetRestDistance ()
 Manually set the resting distance. More...
 
- Public Member Functions inherited from vtkGraphLayoutStrategy
vtkGraphLayoutStrategyNewInstance () const
 
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 ()
 
int HasObserver (unsigned long event)
 
int 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...
 
vtkCommandGetCommand (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...
 
int HasObserver (unsigned long event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
int 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 vtkSimple2DLayoutStrategyNew ()
 
static int IsTypeOf (const char *type)
 
static vtkSimple2DLayoutStrategySafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkGraphLayoutStrategy
static int 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. 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 vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkSimple2DLayoutStrategy ()
 
 ~vtkSimple2DLayoutStrategy () 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
vtkGraphGraph
 
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 2D graph layout

This class is an implementation of the work presented in: Fruchterman & Reingold "Graph Drawing by Force-directed Placement" Software-Practice and Experience 21(11) 1991). The class includes some optimizations but nothing too fancy.

Thanks:
Thanks to Brian Wylie from Sandia National Laboratories for creating this class.
Examples:
vtkSimple2DLayoutStrategy (Examples)
Tests:
vtkSimple2DLayoutStrategy (Tests)

Definition at line 49 of file vtkSimple2DLayoutStrategy.h.

Member Typedef Documentation

Definition at line 54 of file vtkSimple2DLayoutStrategy.h.

Constructor & Destructor Documentation

vtkSimple2DLayoutStrategy::vtkSimple2DLayoutStrategy ( )
protected
vtkSimple2DLayoutStrategy::~vtkSimple2DLayoutStrategy ( )
overrideprotected

Member Function Documentation

static vtkSimple2DLayoutStrategy* vtkSimple2DLayoutStrategy::New ( )
static
static int vtkSimple2DLayoutStrategy::IsTypeOf ( const char *  type)
static
virtual int vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy* vtkSimple2DLayoutStrategy::SafeDownCast ( vtkObjectBase o)
static
virtual vtkObjectBase* vtkSimple2DLayoutStrategy::NewInstanceInternal ( ) const
protectedvirtual

Reimplemented from vtkGraphLayoutStrategy.

vtkSimple2DLayoutStrategy* vtkSimple2DLayoutStrategy::NewInstance ( ) const
void vtkSimple2DLayoutStrategy::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 vtkGraphLayoutStrategy.

virtual void vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::SetJitter ( bool  )
virtual

Set Random jitter of the nodes at initialization to on or off.

Note: It's strongly recommendation to have jitter ON even if you have initial coordinates in your graph. Default is ON

virtual bool vtkSimple2DLayoutStrategy::GetJitter ( )
virtual

Set Random jitter of the nodes at initialization to on or off.

Note: It's strongly recommendation to have jitter ON even if you have initial coordinates in your graph. Default is ON

virtual void vtkSimple2DLayoutStrategy::SetRestDistance ( float  )
virtual

Manually set the resting distance.

Otherwise the distance is computed automatically.

virtual float vtkSimple2DLayoutStrategy::GetRestDistance ( )
virtual

Manually set the resting distance.

Otherwise the distance is computed automatically.

void vtkSimple2DLayoutStrategy::Initialize ( )
overridevirtual

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

Reimplemented from vtkGraphLayoutStrategy.

void vtkSimple2DLayoutStrategy::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 vtkSimple2DLayoutStrategy::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 156 of file vtkSimple2DLayoutStrategy.h.

Member Data Documentation

int vtkSimple2DLayoutStrategy::MaxNumberOfIterations
protected

Definition at line 162 of file vtkSimple2DLayoutStrategy.h.

float vtkSimple2DLayoutStrategy::InitialTemperature
protected

Definition at line 163 of file vtkSimple2DLayoutStrategy.h.

float vtkSimple2DLayoutStrategy::CoolDownRate
protected

Definition at line 164 of file vtkSimple2DLayoutStrategy.h.


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