Detailed Description

a DDGNode that automatically triggers its update function when asking for an output and any input changed. Similar behavior than a DataEngine, but this is NOT a component and can be used everywhere.

Note that it contains a DataTracker (m_dataTracker) to be able to check precisly which input changed if needed.

**** Implementation good rules: (similar to DataEngine)

//init addInput // indicate all inputs addOutput // indicate all outputs setDirtyValue(); // the engine must start dirty (of course, no output are up-to-date)

DataTrackerCallback is usually created using the "addUpdateCallback()" method from Base. Thus the context is usually passed to the lambda making all public & private attributes & methods of the component accessible within the callback function. example:

addUpdateCallback("name", {&name}, [this](DataTracker& tracker){ // Increment the state counter but without changing the state. return d_componentState.getValue(); }, {&d_componentState});

A member function with the same signature - core::objectmodel::ComponentState(DataTracker&) - can also be used.

The update of the inputs is done for you before calling the callback, and they are also cleaned for you after the call. Thus there's no need to manually call updateAllInputsIfDirty() or cleanDirty() (see implementation of update()

Protected Attributes
std::function< sofa::core::objectmodel::ComponentState(const DataTracker &)>	m_callback

sofa::core::objectmodel::Base *	m_owner {nullptr}

Protected Attributes inherited from sofa::core::DataTrackerDDGNode
DataTracker	m_dataTracker

Protected Attributes inherited from sofa::core::objectmodel::DDGNode
DDGLinkContainer	inputs

DDGLinkContainer	outputs

Public Member Functions
void	setCallback (std::function< sofa::core::objectmodel::ComponentState(const DataTracker &)> f)

void	update () override
	Calls the callback when one of the data has changed. More...

void	setOwner (sofa::core::objectmodel::Base *owner)

Public Member Functions inherited from sofa::core::DataTrackerDDGNode
	DataTrackerDDGNode ()

void	addInputs (std::initializer_list< sofa::core::objectmodel::BaseData * > datas)
	Create a DataCallback object associated with multiple Data fields. More...

void	addOutputs (std::initializer_list< sofa::core::objectmodel::BaseData * > datas)

virtual void	cleanDirty (const core::ExecParams *params=nullptr)

void	updateAllInputsIfDirty ()

Public Member Functions inherited from sofa::core::objectmodel::DDGNode
	DDGNode ()
	Constructor. More...

virtual	~DDGNode ()
	Destructor. Automatically remove remaining links. More...

void	addInput (DDGNode *n)
	Add a new input to this node. More...

void	delInput (DDGNode *n)
	Remove an input from this node. More...

void	addOutput (DDGNode *n)
	Add a new output to this node. More...

void	delOutput (DDGNode *n)
	Remove an output from this node. More...

const DDGLinkContainer &	getInputs ()
	Get the list of inputs for this DDGNode. More...

const DDGLinkContainer &	getOutputs ()
	Get the list of outputs for this DDGNode. More...

bool	isDirty () const
	Returns true if the DDGNode needs to be updated. More...

virtual void	setDirtyValue ()
	Indicate the value needs to be updated. More...

virtual void	setDirtyOutputs ()
	Indicate the outputs needs to be updated. This method must be called after changing the value of this node. More...

void	cleanDirty ()
	Set dirty flag to false. More...

virtual void	notifyEndEdit ()
	Notify links that the DGNode has been modified. More...

void	updateIfDirty () const
	Utility method to call update if necessary. This method should be called before reading of writing the value of this node. More...

Additional Inherited Members
Protected Member Functions inherited from sofa::core::objectmodel::DDGNode
virtual void	doAddInput (DDGNode *n)

virtual void	doDelInput (DDGNode *n)

virtual void	doAddOutput (DDGNode *n)

virtual void	doDelOutput (DDGNode *n)

void	cleanDirtyOutputsOfInputs ()
	the dirtyOutputs flags of all the inputs will be set to false More...

Attribute details

◆ m_callback

std::function<sofa::core::objectmodel::ComponentState(const DataTracker&)> sofa::core::DataTrackerCallback::m_callback

protected

◆ m_owner

sofa::core::objectmodel::Base* sofa::core::DataTrackerCallback::m_owner {nullptr}

protected

Function details

◆ setCallback()

void sofa::core::DataTrackerCallback::setCallback ( std::function< sofa::core::objectmodel::ComponentState(const DataTracker &)> f )

set the update function to call when asking for an output and any input changed.

◆ setOwner()

void sofa::core::DataTrackerCallback::setOwner ( sofa::core::objectmodel::Base * owner )

inline

◆ update()

void sofa::core::DataTrackerCallback::update ( )

overridevirtual

Calls the callback when one of the data has changed.

Implements sofa::core::objectmodel::DDGNode.