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// File: NIS_SelectFilter.hxx
// Created: 20.08.07 13:49
// Author: Alexander GRIGORIEV
// Copyright: Open Cascade 2007
#ifndef NIS_SelectFilter_HeaderFile
#define NIS_SelectFilter_HeaderFile
#include <Standard_DefineHandle.hxx>
#include <Standard_Transient.hxx>
class NIS_InteractiveObject;
class Handle_Standard_Type;
/**
* Interface for selection filters. It can be used in NIS_InteractiveContext
* by methods SetFilter and GetFilter.<br>
* Unlike in AIS, only one filter can be installed in InteractiveContext. If
* you need more than one filter instance to work together, create a composite
* NIS_SelectFilter specialization that would hold a list of simpler Filter
* instances.
*/
class NIS_SelectFilter : public Standard_Transient
{
public:
// ---------- PUBLIC METHODS ----------
/**
* Empty constructor.
*/
inline NIS_SelectFilter () {}
/**
* Indicate that the given NIS_InteractiveObject passes the Filter.
* @return
* True - theObject is kept in the Selection, False - excluded from it.
*/
virtual Standard_Boolean
IsOk (const NIS_InteractiveObject * theObject) const = 0;
/**
* Check if the type of InteractiveObject is allowed for selection.
* Default implementation returns always True.
* @return
* True if objects of the given Type should be checked, False if such
* objects are excluded from Selection before any checking.
*/
Standard_EXPORT virtual Standard_Boolean
ActsOn (const Handle_Standard_Type& theType) const;
protected:
// ---------- PROTECTED METHODS ----------
public:
// Declaration of CASCADE RTTI
DEFINE_STANDARD_RTTI (NIS_SelectFilter)
};
// Definition of HANDLE object using Standard_DefineHandle.hxx
DEFINE_STANDARD_HANDLE (NIS_SelectFilter, Standard_Transient)
#endif
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