选择集过滤

示例代码：禁止选中任何直线

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//AcEdSSGetFilterEx.h

#pragma once

class AcEdSSGetFilterEx:public AcEdSSGetFilter
{
virtual void
ssgetAddFilter(
int ssgetFlags,
AcEdSelectionSetService &service,
const AcDbObjectIdArray& selectionSet,
const AcDbObjectIdArray& subSelectionSet);
virtual void
endSSGet(
Acad::PromptStatus returnStatus,
int ssgetFlags,
AcEdSelectionSetService &service,
const AcDbObjectIdArray& selectionSet);
virtual void
endEntsel(
Acad::PromptStatus       returnStatus,
const AcDbObjectId&      pickedEntity,
const AcGePoint3d&       pickedPoint,
AcEdSelectionSetService& service);
//是否可以选中
virtual bool CanBeSelect(AcDbObjectId id);
//是否可以选中
virtual bool CanBeSelect(AcDbEntity* pEnt);
};

//AcEdSSGetFilterEx.cpp

#include “StdAfx.h”
#include “AcEdSSGetFilterEx.h”
void
AcEdSSGetFilterEx::ssgetAddFilter(
int ssgetFlags,
AcEdSelectionSetService &service,
const AcDbObjectIdArray& selectionSet,
const AcDbObjectIdArray& subSelectionSet)
{
acutPrintf(_T(“\r\nAcEdSSGetFilterEx::ssgetAddFilter\r\n”));
for(int i=subSelectionSet.logicalLength()-1;i>=0;i–)
{
if(CanBeSelect(subSelectionSet.at(i)))
{
continue;
}
service.remove(i);
}
}
void AcEdSSGetFilterEx::endSSGet(
Acad::PromptStatus returnStatus,
int ssgetFlags,
AcEdSelectionSetService &service,
const AcDbObjectIdArray& selectionSet)
{
acutPrintf(_T(“\r\nAcEdSSGetFilterEx::endSSGet\r\n”));
for(int i=selectionSet.logicalLength()-1;i>=0;i–)
{
if(CanBeSelect(selectionSet.at(i)))
{
continue;
}
service.remove(i);
}
}
void AcEdSSGetFilterEx::endEntsel(
Acad::PromptStatus       returnStatus,
const AcDbObjectId&      pickedEntity,
const AcGePoint3d&       pickedPoint,
AcEdSelectionSetService& service)
{
acutPrintf(_T(“\r\nAcEdSSGetFilterEx::endEntsel\r\n”));
if(CanBeSelect(pickedEntity))
{
return;
}
service.remove(0);
}
//是否可以选中
bool AcEdSSGetFilterEx::CanBeSelect(AcDbObjectId id)
{
AcDbEntity* pEnt=NULL;
Acad::ErrorStatus es=acdbOpenAcDbEntity(pEnt,id,AcDb::kForRead);
if(es!=Acad::eOk)
{
return false;
}
bool rc=CanBeSelect(pEnt);
pEnt->close();
return rc;
}
//是否可以选中
bool AcEdSSGetFilterEx::CanBeSelect(AcDbEntity* pEnt)
{
return true;
}

//MySSGetFilter.h

#pragma once
#include “AcEdSSGetFilterEx.h”
class MySSGetFilter: public AcEdSSGetFilterEx
{
public:
//是否可以选中
virtual bool CanBeSelect(AcDbEntity* pEnt);
};

//MySSGetFilter.cpp

#include “StdAfx.h”
#include “MySSGetFilter.h”
//是否可以选中
bool MySSGetFilter::CanBeSelect(AcDbEntity* pEnt)
{
if(pEnt->isKindOf(AcDbLine::desc()))
{
return false;
}
else
{
return true;
}
}

//acrxEntryPoint.cpp

#include “StdAfx.h”
#include “resource.h”
#include “MySSGetFilter.h”
MySSGetFilter m_filter;
//—————————————————————————–
#define szRDS _RXST(“”)

//—————————————————————————–
//—– ObjectARX EntryPoint
class CSSGetFilterTestApp : public AcRxArxApp {

public:
CSSGetFilterTestApp () : AcRxArxApp () {}

virtual AcRx::AppRetCode On_kInitAppMsg (void *pkt) {
// TODO: Load dependencies here

// You *must* call On_kInitAppMsg here
AcRx::AppRetCode retCode =AcRxArxApp::On_kInitAppMsg (pkt) ;

addSSgetFilterInputContextReactor(curDoc(), &m_filter);

// TODO: Add your initialization code here

return (retCode) ;
}

virtual AcRx::AppRetCode On_kUnloadAppMsg (void *pkt) {
// TODO: Add your code here

// You *must* call On_kUnloadAppMsg here
AcRx::AppRetCode retCode =AcRxArxApp::On_kUnloadAppMsg (pkt) ;

removeSSgetFilterInputContextReactor(curDoc(), &m_filter);

// TODO: Unload dependencies here

return (retCode) ;
}

virtual void RegisterServerComponents () {
}

} ;

//—————————————————————————–
IMPLEMENT_ARX_ENTRYPOINT(CSSGetFilterTestApp)