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ThirdParty-6/ParaView-5.0.1/ParaViewCore/ServerManager/Core/vtkSMProxyProperty.h

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/*=========================================================================
Program: ParaView
Module: vtkSMProxyProperty.h
Copyright (c) Kitware, Inc.
All rights reserved.
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkSMProxyProperty - property representing pointer(s) to vtkObject(s)
// .SECTION Description
// vtkSMProxyProperty is a concrete sub-class of vtkSMProperty representing
// pointer(s) to vtkObject(s) (through vtkSMProxy).
//
// vtkSMProperty::UpdateDomains() is called by vtkSMProperty itself whenever
// its unchecked values are modified. In case of proxy-properties, the dependent
// domains typically tend to depend on the data information provided by the
// source-proxies added to the property. Thus, to ensure that the domains get
// updated if the data information changes, vtkSMProxyProperty ensures that
// vtkSMProperty::UpdateDomains() is called whenever any of the added proxies
// fires the vtkCommand::UpdateDataEvent (which is fired whenever the pipeline
// us updated through the ServerManager indicating that the data-information
// last used may have been invalidated).
//
// Besides the standard set of attributes, the following XML attributes are
// supported:
// \li command : identifies the method to call on the VTK object e.g.
// AddRepresentation.
// \li clean_command : if present, called once before invoking the method
// specified by \c command every time the property value is pushed e.g.
// RemoveAllRepresentations. If property
// can take multiple values then the \c command is called for for each of the
// values after the clean command for every push.
// \li remove_command : an alternative to clean_command where instead of
// resetting and adding all the values for every push, this simply calls the
// specified method to remove the vtk-objects no longer referred to e.g.
// RemoveRepresentation.
// \li argument_type : identifies the type for value passed to the method on the
// VTK object. Accepted values are "VTK", "SMProxy" or "SIProxy". Default is
// VTK.
// \li null_on_empty : if set to 1, whenever the property's value changes to
// empty i.e. it contains no proxies, the command is called on the VTK object
// with NULL argument useful when there's no clean_command that can be called on
// the VTK object to unset the property e.g. SetLookupTable(NULL).
// li skip_dependency : if set to 1, this property does not result in adding a
// dependency between the proxies set as values of this property and the proxy
// to which the property belongs (which is the default behaviour). Use this with
// care as it would mean that ParaView would no realize any updates are needed
// to the pipeline if any proxy set on the property changes. This is necessary
// in some cases, e.g. if LUT proxy on a representation changes, we don't want
// to representation to treat it same as if the input pipeline changed!
// .SECTION See Also
// vtkSMProperty
#ifndef vtkSMProxyProperty_h
#define vtkSMProxyProperty_h
#include "vtkPVServerManagerCoreModule.h" //needed for exports
#include "vtkSMProperty.h"
class vtkSMProxy;
class vtkSMStateLocator;
class VTKPVSERVERMANAGERCORE_EXPORT vtkSMProxyProperty : public vtkSMProperty
{
public:
// Description:
// When we load ProxyManager state we want Proxy/InputProperty to be able to
// create the corresponding missing proxy. Although when the goal is to load
// a state on any standard proxy, we do not want that proxy property be able
// to create new proxy based on some previous state.
static void EnableProxyCreation();
static void DisableProxyCreation();
static bool CanCreateProxy();
static vtkSMProxyProperty* New();
vtkTypeMacro(vtkSMProxyProperty, vtkSMProperty);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Add/remove/set a proxy to the list of proxies. For SetProxy, the property
// automatically resizes to accommodate the index specified.
virtual void AddProxy(vtkSMProxy* proxy);
virtual void SetProxy(unsigned int idx, vtkSMProxy* proxy);
virtual void RemoveProxy(vtkSMProxy* proxy);
virtual void RemoveAllProxies();
// Description:
// Sets the value of the property to the list of proxies specified.
virtual void SetProxies(unsigned int numElements, vtkSMProxy* proxies[]);
// Description:
// Returns if the given proxy is already added to the property.
bool IsProxyAdded(vtkSMProxy* proxy);
// Description:
// Add an unchecked proxy. Does not modify the property.
// Unchecked proxies are used by domains when verifying whether
// a value is acceptable. To check if a value is in the domains,
// you can do the following:
// @verbatim
// - RemoveAllUncheckedProxies()
// - AddUncheckedProxy(proxy)
// - IsInDomains()
// @endverbatim
virtual void AddUncheckedProxy(vtkSMProxy* proxy);
virtual void SetUncheckedProxy(unsigned int idx, vtkSMProxy* proxy);
// Description:
// Removes all unchecked proxies.
virtual void RemoveAllUncheckedProxies();
// Description:
// Returns the number of proxies.
unsigned int GetNumberOfProxies();
// Description:
// Returns the number of unchecked proxies.
unsigned int GetNumberOfUncheckedProxies();
// Description:
// Set the number of proxies.
void SetNumberOfProxies(unsigned int count);
void SetNumberOfUncheckedProxies(unsigned int count);
// Description:
// Return a proxy. No bounds check is performed.
vtkSMProxy* GetProxy(unsigned int idx);
// Description:
// Return a proxy. No bounds check is performed.
vtkSMProxy* GetUncheckedProxy(unsigned int idx);
// Description:
// Copy all property values.
virtual void Copy(vtkSMProperty* src);
// Description:
// Returns whether the "skip_dependency" attribute is set.
vtkGetMacro(SkipDependency, bool);
// Description:
// Update all proxies referred by this property (if any).
virtual void UpdateAllInputs();
virtual bool IsValueDefault();
// Description:
// For properties that support specifying defaults in XML configuration, this
// method will reset the property value to the default values specified in the
// XML.
// Simply clears the property.
virtual void ResetToXMLDefaults();
//BTX
protected:
vtkSMProxyProperty();
~vtkSMProxyProperty();
// Description:
// Let the property write its content into the stream
virtual void WriteTo(vtkSMMessage* msg);
// Description:
// Let the property read and set its content from the stream
virtual void ReadFrom(const vtkSMMessage* msg, int msg_offset, vtkSMProxyLocator*);
friend class vtkSMProxy;
// Description:
// Set the appropriate ivars from the xml element. Should
// be overwritten by subclass if adding ivars.
virtual int ReadXMLAttributes(vtkSMProxy* parent,
vtkPVXMLElement* element);
// Description:
// Generic method used to generate XML state
virtual void SaveStateValues(vtkPVXMLElement* propertyElement);
// Description:
// Fill state property/proxy XML element with proxy info.
// Return the created proxy XML element that has been added as a child in the
// property definition. If prop == NULL, you must Delete yourself the result
// otherwise prop is olding a reference to the proxy element
virtual vtkPVXMLElement* AddProxyElementState(vtkPVXMLElement *prop,
unsigned int idx);
// Description:
// Updates state from an XML element. Returns 0 on failure.
virtual int LoadState(vtkPVXMLElement* element, vtkSMProxyLocator* loader);
// Description:
// Called when a producer fires the vtkCommand::UpdateDataEvent. We update all
// dependent domains since the data-information may have changed.
void OnUpdateDataEvent() { this->UpdateDomains(); }
// Static flag used to know if the locator should be used to create proxy
// or if the session should be used to find only the existing ones
static bool CreateProxyAllowed;
bool SkipDependency;
class vtkPPInternals;
friend class vtkPPInternals;
vtkPPInternals* PPInternals;
private:
vtkSMProxyProperty(const vtkSMProxyProperty&); // Not implemented
void operator=(const vtkSMProxyProperty&); // Not implemented
//ETX
};
#endif